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         if (!tfo->get_fabric_sense_len) {
 465                 pr_err("Missing tfo->get_fabric_sense_len()\n");
 466                 return -EINVAL;
 467         }
 468         /*
 469          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 470          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 471          * target_core_fabric_configfs.c WWN+TPG group context code.
 472          */
 473         if (!tfo->fabric_make_wwn) {
 474                 pr_err("Missing tfo->fabric_make_wwn()\n");
 475                 return -EINVAL;
 476         }
 477         if (!tfo->fabric_drop_wwn) {
 478                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 479                 return -EINVAL;
 480         }
 481         if (!tfo->fabric_make_tpg) {
 482                 pr_err("Missing tfo->fabric_make_tpg()\n");
 483                 return -EINVAL;
 484         }
 485         if (!tfo->fabric_drop_tpg) {
 486                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 487                 return -EINVAL;
 488         }
 489
 490         return 0;
 491 }
 492
 493 /*
 494  * Called 2nd from fabric module with returned parameter of
 495  * struct target_fabric_configfs * from target_fabric_configfs_init().
 496  *
 497  * Upon a successful registration, the new fabric's struct config_item is
 498  * return.  Also, a pointer to this struct is set in the passed
 499  * struct target_fabric_configfs.
 500  */
 501 int target_fabric_configfs_register(
 502         struct target_fabric_configfs *tf)
 503 {
 504         int ret;
 505
 506         if (!tf) {
 507                 pr_err("Unable to locate target_fabric_configfs"
 508                         " pointer\n");
 509                 return -EINVAL;
 510         }
 511         if (!tf->tf_subsys) {
 512                 pr_err("Unable to target struct config_subsystem"
 513                         " pointer\n");
 514                 return -EINVAL;
 515         }
 516         ret = target_fabric_tf_ops_check(tf);
 517         if (ret < 0)
 518                 return ret;
 519
 520         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 521                 ">>>>>>>>>>\n");
 522         return 0;
 523 }
 524 EXPORT_SYMBOL(target_fabric_configfs_register);
 525
 526 void target_fabric_configfs_deregister(
 527         struct target_fabric_configfs *tf)
 528 {
 529         struct configfs_subsystem *su;
 530
 531         if (!tf) {
 532                 pr_err("Unable to locate passed target_fabric_"
 533                         "configfs\n");
 534                 return;
 535         }
 536         su = tf->tf_subsys;
 537         if (!su) {
 538                 pr_err("Unable to locate passed tf->tf_subsys"
 539                         " pointer\n");
 540                 return;
 541         }
 542         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 543                         ">>>>>>>>>>>>\n");
 544         mutex_lock(&g_tf_lock);
 545         if (atomic_read(&tf->tf_access_cnt)) {
 546                 mutex_unlock(&g_tf_lock);
 547                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 548                         tf->tf_name);
 549                 BUG();
 550         }
 551         list_del(&tf->tf_list);
 552         mutex_unlock(&g_tf_lock);
 553
 554         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 555                         " %s\n", tf->tf_name);
 556         tf->tf_module = NULL;
 557         tf->tf_subsys = NULL;
 558         kfree(tf);
 559
 560         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 561                         ">>>>>\n");
 562 }
 563 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 564
 565 /*##############################################################################
 566 // Stop functions called by external Target Fabrics Modules
 567 //############################################################################*/
 568
 569 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 570
 571 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 572 static ssize_t target_core_dev_show_attr_##_name(                       \
 573         struct se_dev_attrib *da,                                       \
 574         char *page)                                                     \
 575 {                                                                       \
 576         struct se_device *dev;                                          \
 577         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 578         ssize_t rb;                                                     \
 579                                                                         \
 580         spin_lock(&se_dev->se_dev_lock);                                \
 581         dev = se_dev->se_dev_ptr;                                       \
 582         if (!dev) {                                                     \
 583                 spin_unlock(&se_dev->se_dev_lock);                      \
 584                 return -ENODEV;                                         \
 585         }                                                               \
 586         rb = snprintf(page, PAGE_SIZE, "%u\n",                          \
 587                 (u32)dev->se_sub_dev->se_dev_attrib._name);             \
 588         spin_unlock(&se_dev->se_dev_lock);                              \
 589                                                                         \
 590         return rb;                                                      \
 591 }
 592
 593 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 594 static ssize_t target_core_dev_store_attr_##_name(                      \
 595         struct se_dev_attrib *da,                                       \
 596         const char *page,                                               \
 597         size_t count)                                                   \
 598 {                                                                       \
 599         struct se_device *dev;                                          \
 600         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 601         unsigned long val;                                              \
 602         int ret;                                                        \
 603                                                                         \
 604         spin_lock(&se_dev->se_dev_lock);                                \
 605         dev = se_dev->se_dev_ptr;                                       \
 606         if (!dev) {                                                     \
 607                 spin_unlock(&se_dev->se_dev_lock);                      \
 608                 return -ENODEV;                                         \
 609         }                                                               \
 610         ret = strict_strtoul(page, 0, &val);                            \
 611         if (ret < 0) {                                                  \
 612                 spin_unlock(&se_dev->se_dev_lock);                      \
 613                 pr_err("strict_strtoul() failed with"           \
 614                         " ret: %d\n", ret);                             \
 615                 return -EINVAL;                                         \
 616         }                                                               \
 617         ret = se_dev_set_##_name(dev, (u32)val);                        \
 618         spin_unlock(&se_dev->se_dev_lock);                              \
 619                                                                         \
 620         return (!ret) ? count : -EINVAL;                                \
 621 }
 622
 623 #define DEF_DEV_ATTRIB(_name)                                           \
 624 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 625 DEF_DEV_ATTRIB_STORE(_name);
 626
 627 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 628 DEF_DEV_ATTRIB_SHOW(_name);
 629
 630 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 631 #define SE_DEV_ATTR(_name, _mode)                                       \
 632 static struct target_core_dev_attrib_attribute                          \
 633                         target_core_dev_attrib_##_name =                \
 634                 __CONFIGFS_EATTR(_name, _mode,                          \
 635                 target_core_dev_show_attr_##_name,                      \
 636                 target_core_dev_store_attr_##_name);
 637
 638 #define SE_DEV_ATTR_RO(_name);                                          \
 639 static struct target_core_dev_attrib_attribute                          \
 640                         target_core_dev_attrib_##_name =                \
 641         __CONFIGFS_EATTR_RO(_name,                                      \
 642         target_core_dev_show_attr_##_name);
 643
 644 DEF_DEV_ATTRIB(emulate_dpo);
 645 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 646
 647 DEF_DEV_ATTRIB(emulate_fua_write);
 648 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 649
 650 DEF_DEV_ATTRIB(emulate_fua_read);
 651 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 652
 653 DEF_DEV_ATTRIB(emulate_write_cache);
 654 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 655
 656 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 657 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 658
 659 DEF_DEV_ATTRIB(emulate_tas);
 660 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 661
 662 DEF_DEV_ATTRIB(emulate_tpu);
 663 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 664
 665 DEF_DEV_ATTRIB(emulate_tpws);
 666 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 667
 668 DEF_DEV_ATTRIB(enforce_pr_isids);
 669 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 670
 671 DEF_DEV_ATTRIB(is_nonrot);
 672 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 673
 674 DEF_DEV_ATTRIB(emulate_rest_reord);
 675 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 676
 677 DEF_DEV_ATTRIB_RO(hw_block_size);
 678 SE_DEV_ATTR_RO(hw_block_size);
 679
 680 DEF_DEV_ATTRIB(block_size);
 681 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 682
 683 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 684 SE_DEV_ATTR_RO(hw_max_sectors);
 685
 686 DEF_DEV_ATTRIB(max_sectors);
 687 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
 688
 689 DEF_DEV_ATTRIB(fabric_max_sectors);
 690 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 691
 692 DEF_DEV_ATTRIB(optimal_sectors);
 693 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 694
 695 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 696 SE_DEV_ATTR_RO(hw_queue_depth);
 697
 698 DEF_DEV_ATTRIB(queue_depth);
 699 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 700
 701 DEF_DEV_ATTRIB(max_unmap_lba_count);
 702 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 703
 704 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 705 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 706
 707 DEF_DEV_ATTRIB(unmap_granularity);
 708 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 709
 710 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 711 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 712
 713 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 714
 715 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 716         &target_core_dev_attrib_emulate_dpo.attr,
 717         &target_core_dev_attrib_emulate_fua_write.attr,
 718         &target_core_dev_attrib_emulate_fua_read.attr,
 719         &target_core_dev_attrib_emulate_write_cache.attr,
 720         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 721         &target_core_dev_attrib_emulate_tas.attr,
 722         &target_core_dev_attrib_emulate_tpu.attr,
 723         &target_core_dev_attrib_emulate_tpws.attr,
 724         &target_core_dev_attrib_enforce_pr_isids.attr,
 725         &target_core_dev_attrib_is_nonrot.attr,
 726         &target_core_dev_attrib_emulate_rest_reord.attr,
 727         &target_core_dev_attrib_hw_block_size.attr,
 728         &target_core_dev_attrib_block_size.attr,
 729         &target_core_dev_attrib_hw_max_sectors.attr,
 730         &target_core_dev_attrib_max_sectors.attr,
 731         &target_core_dev_attrib_fabric_max_sectors.attr,
 732         &target_core_dev_attrib_optimal_sectors.attr,
 733         &target_core_dev_attrib_hw_queue_depth.attr,
 734         &target_core_dev_attrib_queue_depth.attr,
 735         &target_core_dev_attrib_max_unmap_lba_count.attr,
 736         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 737         &target_core_dev_attrib_unmap_granularity.attr,
 738         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 739         NULL,
 740 };
 741
 742 static struct configfs_item_operations target_core_dev_attrib_ops = {
 743         .show_attribute         = target_core_dev_attrib_attr_show,
 744         .store_attribute        = target_core_dev_attrib_attr_store,
 745 };
 746
 747 static struct config_item_type target_core_dev_attrib_cit = {
 748         .ct_item_ops            = &target_core_dev_attrib_ops,
 749         .ct_attrs               = target_core_dev_attrib_attrs,
 750         .ct_owner               = THIS_MODULE,
 751 };
 752
 753 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 754
 755 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 756
 757 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 758 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 759 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 760                 __CONFIGFS_EATTR(_name, _mode,                          \
 761                 target_core_dev_wwn_show_attr_##_name,                  \
 762                 target_core_dev_wwn_store_attr_##_name);
 763
 764 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 765 do {                                                                    \
 766         static struct target_core_dev_wwn_attribute                     \
 767                         target_core_dev_wwn_##_name =                   \
 768                 __CONFIGFS_EATTR_RO(_name,                              \
 769                 target_core_dev_wwn_show_attr_##_name);                 \
 770 } while (0);
 771
 772 /*
 773  * VPD page 0x80 Unit serial
 774  */
 775 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 776         struct t10_wwn *t10_wwn,
 777         char *page)
 778 {
 779         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 780         struct se_device *dev;
 781
 782         dev = se_dev->se_dev_ptr;
 783         if (!dev)
 784                 return -ENODEV;
 785
 786         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 787                 &t10_wwn->unit_serial[0]);
 788 }
 789
 790 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 791         struct t10_wwn *t10_wwn,
 792         const char *page,
 793         size_t count)
 794 {
 795         struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
 796         struct se_device *dev;
 797         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 798
 799         /*
 800          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 801          * from the struct scsi_device level firmware, do not allow
 802          * VPD Unit Serial to be emulated.
 803          *
 804          * Note this struct scsi_device could also be emulating VPD
 805          * information from its drivers/scsi LLD.  But for now we assume
 806          * it is doing 'the right thing' wrt a world wide unique
 807          * VPD Unit Serial Number that OS dependent multipath can depend on.
 808          */
 809         if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
 810                 pr_err("Underlying SCSI device firmware provided VPD"
 811                         " Unit Serial, ignoring request\n");
 812                 return -EOPNOTSUPP;
 813         }
 814
 815         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 816                 pr_err("Emulated VPD Unit Serial exceeds"
 817                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 818                 return -EOVERFLOW;
 819         }
 820         /*
 821          * Check to see if any active $FABRIC_MOD exports exist.  If they
 822          * do exist, fail here as changing this information on the fly
 823          * (underneath the initiator side OS dependent multipath code)
 824          * could cause negative effects.
 825          */
 826         dev = su_dev->se_dev_ptr;
 827         if (dev) {
 828                 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
 829                         pr_err("Unable to set VPD Unit Serial while"
 830                                 " active %d $FABRIC_MOD exports exist\n",
 831                                 atomic_read(&dev->dev_export_obj.obj_access_count));
 832                         return -EINVAL;
 833                 }
 834         }
 835         /*
 836          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 837          *
 838          * Also, strip any newline added from the userspace
 839          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 840          */
 841         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 842         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 843         snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 844                         "%s", strstrip(buf));
 845         su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
 846
 847         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 848                         " %s\n", su_dev->t10_wwn.unit_serial);
 849
 850         return count;
 851 }
 852
 853 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 854
 855 /*
 856  * VPD page 0x83 Protocol Identifier
 857  */
 858 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 859         struct t10_wwn *t10_wwn,
 860         char *page)
 861 {
 862         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 863         struct se_device *dev;
 864         struct t10_vpd *vpd;
 865         unsigned char buf[VPD_TMP_BUF_SIZE];
 866         ssize_t len = 0;
 867
 868         dev = se_dev->se_dev_ptr;
 869         if (!dev)
 870                 return -ENODEV;
 871
 872         memset(buf, 0, VPD_TMP_BUF_SIZE);
 873
 874         spin_lock(&t10_wwn->t10_vpd_lock);
 875         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 876                 if (!vpd->protocol_identifier_set)
 877                         continue;
 878
 879                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 880
 881                 if (len + strlen(buf) >= PAGE_SIZE)
 882                         break;
 883
 884                 len += sprintf(page+len, "%s", buf);
 885         }
 886         spin_unlock(&t10_wwn->t10_vpd_lock);
 887
 888         return len;
 889 }
 890
 891 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 892         struct t10_wwn *t10_wwn,
 893         const char *page,
 894         size_t count)
 895 {
 896         return -ENOSYS;
 897 }
 898
 899 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 900
 901 /*
 902  * Generic wrapper for dumping VPD identifiers by association.
 903  */
 904 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 905 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 906         struct t10_wwn *t10_wwn,                                        \
 907         char *page)                                                     \
 908 {                                                                       \
 909         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;         \
 910         struct se_device *dev;                                          \
 911         struct t10_vpd *vpd;                                                    \
 912         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 913         ssize_t len = 0;                                                \
 914                                                                         \
 915         dev = se_dev->se_dev_ptr;                                       \
 916         if (!dev)                                                       \
 917                 return -ENODEV;                                         \
 918                                                                         \
 919         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 920         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 921                 if (vpd->association != _assoc)                         \
 922                         continue;                                       \
 923                                                                         \
 924                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 925                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 926                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 927                         break;                                          \
 928                 len += sprintf(page+len, "%s", buf);                    \
 929                                                                         \
 930                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 931                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 932                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 933                         break;                                          \
 934                 len += sprintf(page+len, "%s", buf);                    \
 935                                                                         \
 936                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 937                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 938                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 939                         break;                                          \
 940                 len += sprintf(page+len, "%s", buf);                    \
 941         }                                                               \
 942         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 943                                                                         \
 944         return len;                                                     \
 945 }
 946
 947 /*
 948  * VPD page 0x83 Association: Logical Unit
 949  */
 950 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 951
 952 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 953         struct t10_wwn *t10_wwn,
 954         const char *page,
 955         size_t count)
 956 {
 957         return -ENOSYS;
 958 }
 959
 960 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 961
 962 /*
 963  * VPD page 0x83 Association: Target Port
 964  */
 965 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 966
 967 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 968         struct t10_wwn *t10_wwn,
 969         const char *page,
 970         size_t count)
 971 {
 972         return -ENOSYS;
 973 }
 974
 975 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 976
 977 /*
 978  * VPD page 0x83 Association: SCSI Target Device
 979  */
 980 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 981
 982 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 983         struct t10_wwn *t10_wwn,
 984         const char *page,
 985         size_t count)
 986 {
 987         return -ENOSYS;
 988 }
 989
 990 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 991
 992 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 993
 994 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 995         &target_core_dev_wwn_vpd_unit_serial.attr,
 996         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 997         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 998         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 999         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1000         NULL,
1001 };
1002
1003 static struct configfs_item_operations target_core_dev_wwn_ops = {
1004         .show_attribute         = target_core_dev_wwn_attr_show,
1005         .store_attribute        = target_core_dev_wwn_attr_store,
1006 };
1007
1008 static struct config_item_type target_core_dev_wwn_cit = {
1009         .ct_item_ops            = &target_core_dev_wwn_ops,
1010         .ct_attrs               = target_core_dev_wwn_attrs,
1011         .ct_owner               = THIS_MODULE,
1012 };
1013
1014 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1015
1016 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
1017
1018 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1019 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1020 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1021         __CONFIGFS_EATTR(_name, _mode,                                  \
1022         target_core_dev_pr_show_attr_##_name,                           \
1023         target_core_dev_pr_store_attr_##_name);
1024
1025 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1026 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1027         __CONFIGFS_EATTR_RO(_name,                                      \
1028         target_core_dev_pr_show_attr_##_name);
1029
1030 /*
1031  * res_holder
1032  */
1033 static ssize_t target_core_dev_pr_show_spc3_res(
1034         struct se_device *dev,
1035         char *page,
1036         ssize_t *len)
1037 {
1038         struct se_node_acl *se_nacl;
1039         struct t10_pr_registration *pr_reg;
1040         char i_buf[PR_REG_ISID_ID_LEN];
1041         int prf_isid;
1042
1043         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1044
1045         spin_lock(&dev->dev_reservation_lock);
1046         pr_reg = dev->dev_pr_res_holder;
1047         if (!pr_reg) {
1048                 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1049                 spin_unlock(&dev->dev_reservation_lock);
1050                 return *len;
1051         }
1052         se_nacl = pr_reg->pr_reg_nacl;
1053         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1054                                 PR_REG_ISID_ID_LEN);
1055
1056         *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1057                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1058                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1059         spin_unlock(&dev->dev_reservation_lock);
1060
1061         return *len;
1062 }
1063
1064 static ssize_t target_core_dev_pr_show_spc2_res(
1065         struct se_device *dev,
1066         char *page,
1067         ssize_t *len)
1068 {
1069         struct se_node_acl *se_nacl;
1070
1071         spin_lock(&dev->dev_reservation_lock);
1072         se_nacl = dev->dev_reserved_node_acl;
1073         if (!se_nacl) {
1074                 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1075                 spin_unlock(&dev->dev_reservation_lock);
1076                 return *len;
1077         }
1078         *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1079                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1080                 se_nacl->initiatorname);
1081         spin_unlock(&dev->dev_reservation_lock);
1082
1083         return *len;
1084 }
1085
1086 static ssize_t target_core_dev_pr_show_attr_res_holder(
1087         struct se_subsystem_dev *su_dev,
1088         char *page)
1089 {
1090         ssize_t len = 0;
1091
1092         if (!su_dev->se_dev_ptr)
1093                 return -ENODEV;
1094
1095         switch (su_dev->t10_pr.res_type) {
1096         case SPC3_PERSISTENT_RESERVATIONS:
1097                 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1098                                 page, &len);
1099                 break;
1100         case SPC2_RESERVATIONS:
1101                 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1102                                 page, &len);
1103                 break;
1104         case SPC_PASSTHROUGH:
1105                 len += sprintf(page+len, "Passthrough\n");
1106                 break;
1107         default:
1108                 len += sprintf(page+len, "Unknown\n");
1109                 break;
1110         }
1111
1112         return len;
1113 }
1114
1115 SE_DEV_PR_ATTR_RO(res_holder);
1116
1117 /*
1118  * res_pr_all_tgt_pts
1119  */
1120 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1121         struct se_subsystem_dev *su_dev,
1122         char *page)
1123 {
1124         struct se_device *dev;
1125         struct t10_pr_registration *pr_reg;
1126         ssize_t len = 0;
1127
1128         dev = su_dev->se_dev_ptr;
1129         if (!dev)
1130                 return -ENODEV;
1131
1132         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1133                 return len;
1134
1135         spin_lock(&dev->dev_reservation_lock);
1136         pr_reg = dev->dev_pr_res_holder;
1137         if (!pr_reg) {
1138                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1139                 spin_unlock(&dev->dev_reservation_lock);
1140                 return len;
1141         }
1142         /*
1143          * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1144          * Basic PERSISTENT RESERVER OUT parameter list, page 290
1145          */
1146         if (pr_reg->pr_reg_all_tg_pt)
1147                 len = sprintf(page, "SPC-3 Reservation: All Target"
1148                         " Ports registration\n");
1149         else
1150                 len = sprintf(page, "SPC-3 Reservation: Single"
1151                         " Target Port registration\n");
1152         spin_unlock(&dev->dev_reservation_lock);
1153
1154         return len;
1155 }
1156
1157 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1158
1159 /*
1160  * res_pr_generation
1161  */
1162 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1163         struct se_subsystem_dev *su_dev,
1164         char *page)
1165 {
1166         if (!su_dev->se_dev_ptr)
1167                 return -ENODEV;
1168
1169         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1170                 return 0;
1171
1172         return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1173 }
1174
1175 SE_DEV_PR_ATTR_RO(res_pr_generation);
1176
1177 /*
1178  * res_pr_holder_tg_port
1179  */
1180 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1181         struct se_subsystem_dev *su_dev,
1182         char *page)
1183 {
1184         struct se_device *dev;
1185         struct se_node_acl *se_nacl;
1186         struct se_lun *lun;
1187         struct se_portal_group *se_tpg;
1188         struct t10_pr_registration *pr_reg;
1189         struct target_core_fabric_ops *tfo;
1190         ssize_t len = 0;
1191
1192         dev = su_dev->se_dev_ptr;
1193         if (!dev)
1194                 return -ENODEV;
1195
1196         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1197                 return len;
1198
1199         spin_lock(&dev->dev_reservation_lock);
1200         pr_reg = dev->dev_pr_res_holder;
1201         if (!pr_reg) {
1202                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1203                 spin_unlock(&dev->dev_reservation_lock);
1204                 return len;
1205         }
1206         se_nacl = pr_reg->pr_reg_nacl;
1207         se_tpg = se_nacl->se_tpg;
1208         lun = pr_reg->pr_reg_tg_pt_lun;
1209         tfo = se_tpg->se_tpg_tfo;
1210
1211         len += sprintf(page+len, "SPC-3 Reservation: %s"
1212                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1213                 tfo->tpg_get_wwn(se_tpg));
1214         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1215                 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1216                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1217                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1218                 tfo->get_fabric_name(), lun->unpacked_lun);
1219         spin_unlock(&dev->dev_reservation_lock);
1220
1221         return len;
1222 }
1223
1224 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1225
1226 /*
1227  * res_pr_registered_i_pts
1228  */
1229 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1230         struct se_subsystem_dev *su_dev,
1231         char *page)
1232 {
1233         struct target_core_fabric_ops *tfo;
1234         struct t10_pr_registration *pr_reg;
1235         unsigned char buf[384];
1236         char i_buf[PR_REG_ISID_ID_LEN];
1237         ssize_t len = 0;
1238         int reg_count = 0, prf_isid;
1239
1240         if (!su_dev->se_dev_ptr)
1241                 return -ENODEV;
1242
1243         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1244                 return len;
1245
1246         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1247
1248         spin_lock(&su_dev->t10_pr.registration_lock);
1249         list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1250                         pr_reg_list) {
1251
1252                 memset(buf, 0, 384);
1253                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1254                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1255                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1256                                         PR_REG_ISID_ID_LEN);
1257                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1258                         tfo->get_fabric_name(),
1259                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1260                         &i_buf[0] : "", pr_reg->pr_res_key,
1261                         pr_reg->pr_res_generation);
1262
1263                 if (len + strlen(buf) >= PAGE_SIZE)
1264                         break;
1265
1266                 len += sprintf(page+len, "%s", buf);
1267                 reg_count++;
1268         }
1269         spin_unlock(&su_dev->t10_pr.registration_lock);
1270
1271         if (!reg_count)
1272                 len += sprintf(page+len, "None\n");
1273
1274         return len;
1275 }
1276
1277 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1278
1279 /*
1280  * res_pr_type
1281  */
1282 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1283         struct se_subsystem_dev *su_dev,
1284         char *page)
1285 {
1286         struct se_device *dev;
1287         struct t10_pr_registration *pr_reg;
1288         ssize_t len = 0;
1289
1290         dev = su_dev->se_dev_ptr;
1291         if (!dev)
1292                 return -ENODEV;
1293
1294         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1295                 return len;
1296
1297         spin_lock(&dev->dev_reservation_lock);
1298         pr_reg = dev->dev_pr_res_holder;
1299         if (!pr_reg) {
1300                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1301                 spin_unlock(&dev->dev_reservation_lock);
1302                 return len;
1303         }
1304         len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1305                 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1306         spin_unlock(&dev->dev_reservation_lock);
1307
1308         return len;
1309 }
1310
1311 SE_DEV_PR_ATTR_RO(res_pr_type);
1312
1313 /*
1314  * res_type
1315  */
1316 static ssize_t target_core_dev_pr_show_attr_res_type(
1317         struct se_subsystem_dev *su_dev,
1318         char *page)
1319 {
1320         ssize_t len = 0;
1321
1322         if (!su_dev->se_dev_ptr)
1323                 return -ENODEV;
1324
1325         switch (su_dev->t10_pr.res_type) {
1326         case SPC3_PERSISTENT_RESERVATIONS:
1327                 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1328                 break;
1329         case SPC2_RESERVATIONS:
1330                 len = sprintf(page, "SPC2_RESERVATIONS\n");
1331                 break;
1332         case SPC_PASSTHROUGH:
1333                 len = sprintf(page, "SPC_PASSTHROUGH\n");
1334                 break;
1335         default:
1336                 len = sprintf(page, "UNKNOWN\n");
1337                 break;
1338         }
1339
1340         return len;
1341 }
1342
1343 SE_DEV_PR_ATTR_RO(res_type);
1344
1345 /*
1346  * res_aptpl_active
1347  */
1348
1349 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1350         struct se_subsystem_dev *su_dev,
1351         char *page)
1352 {
1353         if (!su_dev->se_dev_ptr)
1354                 return -ENODEV;
1355
1356         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1357                 return 0;
1358
1359         return sprintf(page, "APTPL Bit Status: %s\n",
1360                 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1361 }
1362
1363 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1364
1365 /*
1366  * res_aptpl_metadata
1367  */
1368 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1369         struct se_subsystem_dev *su_dev,
1370         char *page)
1371 {
1372         if (!su_dev->se_dev_ptr)
1373                 return -ENODEV;
1374
1375         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1376                 return 0;
1377
1378         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1379 }
1380
1381 enum {
1382         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1383         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1384         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1385         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1386 };
1387
1388 static match_table_t tokens = {
1389         {Opt_initiator_fabric, "initiator_fabric=%s"},
1390         {Opt_initiator_node, "initiator_node=%s"},
1391         {Opt_initiator_sid, "initiator_sid=%s"},
1392         {Opt_sa_res_key, "sa_res_key=%s"},
1393         {Opt_res_holder, "res_holder=%d"},
1394         {Opt_res_type, "res_type=%d"},
1395         {Opt_res_scope, "res_scope=%d"},
1396         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1397         {Opt_mapped_lun, "mapped_lun=%d"},
1398         {Opt_target_fabric, "target_fabric=%s"},
1399         {Opt_target_node, "target_node=%s"},
1400         {Opt_tpgt, "tpgt=%d"},
1401         {Opt_port_rtpi, "port_rtpi=%d"},
1402         {Opt_target_lun, "target_lun=%d"},
1403         {Opt_err, NULL}
1404 };
1405
1406 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1407         struct se_subsystem_dev *su_dev,
1408         const char *page,
1409         size_t count)
1410 {
1411         struct se_device *dev;
1412         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1413         unsigned char *t_fabric = NULL, *t_port = NULL;
1414         char *orig, *ptr, *arg_p, *opts;
1415         substring_t args[MAX_OPT_ARGS];
1416         unsigned long long tmp_ll;
1417         u64 sa_res_key = 0;
1418         u32 mapped_lun = 0, target_lun = 0;
1419         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1420         u16 port_rpti = 0, tpgt = 0;
1421         u8 type = 0, scope;
1422
1423         dev = su_dev->se_dev_ptr;
1424         if (!dev)
1425                 return -ENODEV;
1426
1427         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1428                 return 0;
1429
1430         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1431                 pr_debug("Unable to process APTPL metadata while"
1432                         " active fabric exports exist\n");
1433                 return -EINVAL;
1434         }
1435
1436         opts = kstrdup(page, GFP_KERNEL);
1437         if (!opts)
1438                 return -ENOMEM;
1439
1440         orig = opts;
1441         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1442                 if (!*ptr)
1443                         continue;
1444
1445                 token = match_token(ptr, tokens, args);
1446                 switch (token) {
1447                 case Opt_initiator_fabric:
1448                         i_fabric = match_strdup(&args[0]);
1449                         if (!i_fabric) {
1450                                 ret = -ENOMEM;
1451                                 goto out;
1452                         }
1453                         break;
1454                 case Opt_initiator_node:
1455                         i_port = match_strdup(&args[0]);
1456                         if (!i_port) {
1457                                 ret = -ENOMEM;
1458                                 goto out;
1459                         }
1460                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1461                                 pr_err("APTPL metadata initiator_node="
1462                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1463                                         PR_APTPL_MAX_IPORT_LEN);
1464                                 ret = -EINVAL;
1465                                 break;
1466                         }
1467                         break;
1468                 case Opt_initiator_sid:
1469                         isid = match_strdup(&args[0]);
1470                         if (!isid) {
1471                                 ret = -ENOMEM;
1472                                 goto out;
1473                         }
1474                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1475                                 pr_err("APTPL metadata initiator_isid"
1476                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1477                                         PR_REG_ISID_LEN);
1478                                 ret = -EINVAL;
1479                                 break;
1480                         }
1481                         break;
1482                 case Opt_sa_res_key:
1483                         arg_p = match_strdup(&args[0]);
1484                         if (!arg_p) {
1485                                 ret = -ENOMEM;
1486                                 goto out;
1487                         }
1488                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1489                         if (ret < 0) {
1490                                 pr_err("strict_strtoull() failed for"
1491                                         " sa_res_key=\n");
1492                                 goto out;
1493                         }
1494                         sa_res_key = (u64)tmp_ll;
1495                         break;
1496                 /*
1497                  * PR APTPL Metadata for Reservation
1498                  */
1499                 case Opt_res_holder:
1500                         match_int(args, &arg);
1501                         res_holder = arg;
1502                         break;
1503                 case Opt_res_type:
1504                         match_int(args, &arg);
1505                         type = (u8)arg;
1506                         break;
1507                 case Opt_res_scope:
1508                         match_int(args, &arg);
1509                         scope = (u8)arg;
1510                         break;
1511                 case Opt_res_all_tg_pt:
1512                         match_int(args, &arg);
1513                         all_tg_pt = (int)arg;
1514                         break;
1515                 case Opt_mapped_lun:
1516                         match_int(args, &arg);
1517                         mapped_lun = (u32)arg;
1518                         break;
1519                 /*
1520                  * PR APTPL Metadata for Target Port
1521                  */
1522                 case Opt_target_fabric:
1523                         t_fabric = match_strdup(&args[0]);
1524                         if (!t_fabric) {
1525                                 ret = -ENOMEM;
1526                                 goto out;
1527                         }
1528                         break;
1529                 case Opt_target_node:
1530                         t_port = match_strdup(&args[0]);
1531                         if (!t_port) {
1532                                 ret = -ENOMEM;
1533                                 goto out;
1534                         }
1535                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1536                                 pr_err("APTPL metadata target_node="
1537                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1538                                         PR_APTPL_MAX_TPORT_LEN);
1539                                 ret = -EINVAL;
1540                                 break;
1541                         }
1542                         break;
1543                 case Opt_tpgt:
1544                         match_int(args, &arg);
1545                         tpgt = (u16)arg;
1546                         break;
1547                 case Opt_port_rtpi:
1548                         match_int(args, &arg);
1549                         port_rpti = (u16)arg;
1550                         break;
1551                 case Opt_target_lun:
1552                         match_int(args, &arg);
1553                         target_lun = (u32)arg;
1554                         break;
1555                 default:
1556                         break;
1557                 }
1558         }
1559
1560         if (!i_port || !t_port || !sa_res_key) {
1561                 pr_err("Illegal parameters for APTPL registration\n");
1562                 ret = -EINVAL;
1563                 goto out;
1564         }
1565
1566         if (res_holder && !(type)) {
1567                 pr_err("Illegal PR type: 0x%02x for reservation"
1568                                 " holder\n", type);
1569                 ret = -EINVAL;
1570                 goto out;
1571         }
1572
1573         ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1574                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1575                         res_holder, all_tg_pt, type);
1576 out:
1577         kfree(i_fabric);
1578         kfree(i_port);
1579         kfree(isid);
1580         kfree(t_fabric);
1581         kfree(t_port);
1582         kfree(orig);
1583         return (ret == 0) ? count : ret;
1584 }
1585
1586 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1587
1588 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1589
1590 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1591         &target_core_dev_pr_res_holder.attr,
1592         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1593         &target_core_dev_pr_res_pr_generation.attr,
1594         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1595         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1596         &target_core_dev_pr_res_pr_type.attr,
1597         &target_core_dev_pr_res_type.attr,
1598         &target_core_dev_pr_res_aptpl_active.attr,
1599         &target_core_dev_pr_res_aptpl_metadata.attr,
1600         NULL,
1601 };
1602
1603 static struct configfs_item_operations target_core_dev_pr_ops = {
1604         .show_attribute         = target_core_dev_pr_attr_show,
1605         .store_attribute        = target_core_dev_pr_attr_store,
1606 };
1607
1608 static struct config_item_type target_core_dev_pr_cit = {
1609         .ct_item_ops            = &target_core_dev_pr_ops,
1610         .ct_attrs               = target_core_dev_pr_attrs,
1611         .ct_owner               = THIS_MODULE,
1612 };
1613
1614 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1615
1616 /*  Start functions for struct config_item_type target_core_dev_cit */
1617
1618 static ssize_t target_core_show_dev_info(void *p, char *page)
1619 {
1620         struct se_subsystem_dev *se_dev = p;
1621         struct se_hba *hba = se_dev->se_dev_hba;
1622         struct se_subsystem_api *t = hba->transport;
1623         int bl = 0;
1624         ssize_t read_bytes = 0;
1625
1626         if (!se_dev->se_dev_ptr)
1627                 return -ENODEV;
1628
1629         transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1630         read_bytes += bl;
1631         read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1632         return read_bytes;
1633 }
1634
1635 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1636         .attr   = { .ca_owner = THIS_MODULE,
1637                     .ca_name = "info",
1638                     .ca_mode = S_IRUGO },
1639         .show   = target_core_show_dev_info,
1640         .store  = NULL,
1641 };
1642
1643 static ssize_t target_core_store_dev_control(
1644         void *p,
1645         const char *page,
1646         size_t count)
1647 {
1648         struct se_subsystem_dev *se_dev = p;
1649         struct se_hba *hba = se_dev->se_dev_hba;
1650         struct se_subsystem_api *t = hba->transport;
1651
1652         if (!se_dev->se_dev_su_ptr) {
1653                 pr_err("Unable to locate struct se_subsystem_dev>se"
1654                                 "_dev_su_ptr\n");
1655                 return -EINVAL;
1656         }
1657
1658         return t->set_configfs_dev_params(hba, se_dev, page, count);
1659 }
1660
1661 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1662         .attr   = { .ca_owner = THIS_MODULE,
1663                     .ca_name = "control",
1664                     .ca_mode = S_IWUSR },
1665         .show   = NULL,
1666         .store  = target_core_store_dev_control,
1667 };
1668
1669 static ssize_t target_core_show_dev_alias(void *p, char *page)
1670 {
1671         struct se_subsystem_dev *se_dev = p;
1672
1673         if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1674                 return 0;
1675
1676         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1677 }
1678
1679 static ssize_t target_core_store_dev_alias(
1680         void *p,
1681         const char *page,
1682         size_t count)
1683 {
1684         struct se_subsystem_dev *se_dev = p;
1685         struct se_hba *hba = se_dev->se_dev_hba;
1686         ssize_t read_bytes;
1687
1688         if (count > (SE_DEV_ALIAS_LEN-1)) {
1689                 pr_err("alias count: %d exceeds"
1690                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1691                         SE_DEV_ALIAS_LEN-1);
1692                 return -EINVAL;
1693         }
1694
1695         read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1696                         "%s", page);
1697         if (!read_bytes)
1698                 return -EINVAL;
1699         if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
1700                 se_dev->se_dev_alias[read_bytes - 1] = '\0';
1701
1702         se_dev->su_dev_flags |= SDF_USING_ALIAS;
1703
1704         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1705                 config_item_name(&hba->hba_group.cg_item),
1706                 config_item_name(&se_dev->se_dev_group.cg_item),
1707                 se_dev->se_dev_alias);
1708
1709         return read_bytes;
1710 }
1711
1712 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1713         .attr   = { .ca_owner = THIS_MODULE,
1714                     .ca_name = "alias",
1715                     .ca_mode =  S_IRUGO | S_IWUSR },
1716         .show   = target_core_show_dev_alias,
1717         .store  = target_core_store_dev_alias,
1718 };
1719
1720 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1721 {
1722         struct se_subsystem_dev *se_dev = p;
1723
1724         if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1725                 return 0;
1726
1727         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1728 }
1729
1730 static ssize_t target_core_store_dev_udev_path(
1731         void *p,
1732         const char *page,
1733         size_t count)
1734 {
1735         struct se_subsystem_dev *se_dev = p;
1736         struct se_hba *hba = se_dev->se_dev_hba;
1737         ssize_t read_bytes;
1738
1739         if (count > (SE_UDEV_PATH_LEN-1)) {
1740                 pr_err("udev_path count: %d exceeds"
1741                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1742                         SE_UDEV_PATH_LEN-1);
1743                 return -EINVAL;
1744         }
1745
1746         read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1747                         "%s", page);
1748         if (!read_bytes)
1749                 return -EINVAL;
1750         if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
1751                 se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
1752
1753         se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1754
1755         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1756                 config_item_name(&hba->hba_group.cg_item),
1757                 config_item_name(&se_dev->se_dev_group.cg_item),
1758                 se_dev->se_dev_udev_path);
1759
1760         return read_bytes;
1761 }
1762
1763 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1764         .attr   = { .ca_owner = THIS_MODULE,
1765                     .ca_name = "udev_path",
1766                     .ca_mode =  S_IRUGO | S_IWUSR },
1767         .show   = target_core_show_dev_udev_path,
1768         .store  = target_core_store_dev_udev_path,
1769 };
1770
1771 static ssize_t target_core_store_dev_enable(
1772         void *p,
1773         const char *page,
1774         size_t count)
1775 {
1776         struct se_subsystem_dev *se_dev = p;
1777         struct se_device *dev;
1778         struct se_hba *hba = se_dev->se_dev_hba;
1779         struct se_subsystem_api *t = hba->transport;
1780         char *ptr;
1781
1782         ptr = strstr(page, "1");
1783         if (!ptr) {
1784                 pr_err("For dev_enable ops, only valid value"
1785                                 " is \"1\"\n");
1786                 return -EINVAL;
1787         }
1788         if (se_dev->se_dev_ptr) {
1789                 pr_err("se_dev->se_dev_ptr already set for storage"
1790                                 " object\n");
1791                 return -EEXIST;
1792         }
1793
1794         if (t->check_configfs_dev_params(hba, se_dev) < 0)
1795                 return -EINVAL;
1796
1797         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1798         if (IS_ERR(dev))
1799                 return PTR_ERR(dev);
1800         else if (!dev)
1801                 return -EINVAL;
1802
1803         se_dev->se_dev_ptr = dev;
1804         pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1805                 " %p\n", se_dev->se_dev_ptr);
1806
1807         return count;
1808 }
1809
1810 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1811         .attr   = { .ca_owner = THIS_MODULE,
1812                     .ca_name = "enable",
1813                     .ca_mode = S_IWUSR },
1814         .show   = NULL,
1815         .store  = target_core_store_dev_enable,
1816 };
1817
1818 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1819 {
1820         struct se_device *dev;
1821         struct se_subsystem_dev *su_dev = p;
1822         struct config_item *lu_ci;
1823         struct t10_alua_lu_gp *lu_gp;
1824         struct t10_alua_lu_gp_member *lu_gp_mem;
1825         ssize_t len = 0;
1826
1827         dev = su_dev->se_dev_ptr;
1828         if (!dev)
1829                 return -ENODEV;
1830
1831         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1832                 return len;
1833
1834         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1835         if (!lu_gp_mem) {
1836                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1837                                 " pointer\n");
1838                 return -EINVAL;
1839         }
1840
1841         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1842         lu_gp = lu_gp_mem->lu_gp;
1843         if (lu_gp) {
1844                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1845                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1846                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1847         }
1848         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1849
1850         return len;
1851 }
1852
1853 static ssize_t target_core_store_alua_lu_gp(
1854         void *p,
1855         const char *page,
1856         size_t count)
1857 {
1858         struct se_device *dev;
1859         struct se_subsystem_dev *su_dev = p;
1860         struct se_hba *hba = su_dev->se_dev_hba;
1861         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1862         struct t10_alua_lu_gp_member *lu_gp_mem;
1863         unsigned char buf[LU_GROUP_NAME_BUF];
1864         int move = 0;
1865
1866         dev = su_dev->se_dev_ptr;
1867         if (!dev)
1868                 return -ENODEV;
1869
1870         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1871                 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1872                         config_item_name(&hba->hba_group.cg_item),
1873                         config_item_name(&su_dev->se_dev_group.cg_item));
1874                 return -EINVAL;
1875         }
1876         if (count > LU_GROUP_NAME_BUF) {
1877                 pr_err("ALUA LU Group Alias too large!\n");
1878                 return -EINVAL;
1879         }
1880         memset(buf, 0, LU_GROUP_NAME_BUF);
1881         memcpy(buf, page, count);
1882         /*
1883          * Any ALUA logical unit alias besides "NULL" means we will be
1884          * making a new group association.
1885          */
1886         if (strcmp(strstrip(buf), "NULL")) {
1887                 /*
1888                  * core_alua_get_lu_gp_by_name() will increment reference to
1889                  * struct t10_alua_lu_gp.  This reference is released with
1890                  * core_alua_get_lu_gp_by_name below().
1891                  */
1892                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1893                 if (!lu_gp_new)
1894                         return -ENODEV;
1895         }
1896         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1897         if (!lu_gp_mem) {
1898                 if (lu_gp_new)
1899                         core_alua_put_lu_gp_from_name(lu_gp_new);
1900                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1901                                 " pointer\n");
1902                 return -EINVAL;
1903         }
1904
1905         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1906         lu_gp = lu_gp_mem->lu_gp;
1907         if (lu_gp) {
1908                 /*
1909                  * Clearing an existing lu_gp association, and replacing
1910                  * with NULL
1911                  */
1912                 if (!lu_gp_new) {
1913                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1914                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1915                                 " %hu\n",
1916                                 config_item_name(&hba->hba_group.cg_item),
1917                                 config_item_name(&su_dev->se_dev_group.cg_item),
1918                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1919                                 lu_gp->lu_gp_id);
1920
1921                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1922                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1923
1924                         return count;
1925                 }
1926                 /*
1927                  * Removing existing association of lu_gp_mem with lu_gp
1928                  */
1929                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1930                 move = 1;
1931         }
1932         /*
1933          * Associate lu_gp_mem with lu_gp_new.
1934          */
1935         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1936         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1937
1938         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1939                 " core/alua/lu_gps/%s, ID: %hu\n",
1940                 (move) ? "Moving" : "Adding",
1941                 config_item_name(&hba->hba_group.cg_item),
1942                 config_item_name(&su_dev->se_dev_group.cg_item),
1943                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1944                 lu_gp_new->lu_gp_id);
1945
1946         core_alua_put_lu_gp_from_name(lu_gp_new);
1947         return count;
1948 }
1949
1950 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1951         .attr   = { .ca_owner = THIS_MODULE,
1952                     .ca_name = "alua_lu_gp",
1953                     .ca_mode = S_IRUGO | S_IWUSR },
1954         .show   = target_core_show_alua_lu_gp,
1955         .store  = target_core_store_alua_lu_gp,
1956 };
1957
1958 static struct configfs_attribute *lio_core_dev_attrs[] = {
1959         &target_core_attr_dev_info.attr,
1960         &target_core_attr_dev_control.attr,
1961         &target_core_attr_dev_alias.attr,
1962         &target_core_attr_dev_udev_path.attr,
1963         &target_core_attr_dev_enable.attr,
1964         &target_core_attr_dev_alua_lu_gp.attr,
1965         NULL,
1966 };
1967
1968 static void target_core_dev_release(struct config_item *item)
1969 {
1970         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1971                                 struct se_subsystem_dev, se_dev_group);
1972         struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1973         struct se_subsystem_api *t = hba->transport;
1974         struct config_group *dev_cg = &se_dev->se_dev_group;
1975
1976         kfree(dev_cg->default_groups);
1977         /*
1978          * This pointer will set when the storage is enabled with:
1979          *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1980          */
1981         if (se_dev->se_dev_ptr) {
1982                 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1983                         "virtual_device() for se_dev_ptr: %p\n",
1984                         se_dev->se_dev_ptr);
1985
1986                 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1987         } else {
1988                 /*
1989                  * Release struct se_subsystem_dev->se_dev_su_ptr..
1990                  */
1991                 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1992                         "device() for se_dev_su_ptr: %p\n",
1993                         se_dev->se_dev_su_ptr);
1994
1995                 t->free_device(se_dev->se_dev_su_ptr);
1996         }
1997
1998         pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
1999                         "_dev_t: %p\n", se_dev);
2000         kfree(se_dev);
2001 }
2002
2003 static ssize_t target_core_dev_show(struct config_item *item,
2004                                      struct configfs_attribute *attr,
2005                                      char *page)
2006 {
2007         struct se_subsystem_dev *se_dev = container_of(
2008                         to_config_group(item), struct se_subsystem_dev,
2009                         se_dev_group);
2010         struct target_core_configfs_attribute *tc_attr = container_of(
2011                         attr, struct target_core_configfs_attribute, attr);
2012
2013         if (!tc_attr->show)
2014                 return -EINVAL;
2015
2016         return tc_attr->show(se_dev, page);
2017 }
2018
2019 static ssize_t target_core_dev_store(struct config_item *item,
2020                                       struct configfs_attribute *attr,
2021                                       const char *page, size_t count)
2022 {
2023         struct se_subsystem_dev *se_dev = container_of(
2024                         to_config_group(item), struct se_subsystem_dev,
2025                         se_dev_group);
2026         struct target_core_configfs_attribute *tc_attr = container_of(
2027                         attr, struct target_core_configfs_attribute, attr);
2028
2029         if (!tc_attr->store)
2030                 return -EINVAL;
2031
2032         return tc_attr->store(se_dev, page, count);
2033 }
2034
2035 static struct configfs_item_operations target_core_dev_item_ops = {
2036         .release                = target_core_dev_release,
2037         .show_attribute         = target_core_dev_show,
2038         .store_attribute        = target_core_dev_store,
2039 };
2040
2041 static struct config_item_type target_core_dev_cit = {
2042         .ct_item_ops            = &target_core_dev_item_ops,
2043         .ct_attrs               = lio_core_dev_attrs,
2044         .ct_owner               = THIS_MODULE,
2045 };
2046
2047 /* End functions for struct config_item_type target_core_dev_cit */
2048
2049 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2050
2051 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2052 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2053 static struct target_core_alua_lu_gp_attribute                          \
2054                         target_core_alua_lu_gp_##_name =                \
2055         __CONFIGFS_EATTR(_name, _mode,                                  \
2056         target_core_alua_lu_gp_show_attr_##_name,                       \
2057         target_core_alua_lu_gp_store_attr_##_name);
2058
2059 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2060 static struct target_core_alua_lu_gp_attribute                          \
2061                         target_core_alua_lu_gp_##_name =                \
2062         __CONFIGFS_EATTR_RO(_name,                                      \
2063         target_core_alua_lu_gp_show_attr_##_name);
2064
2065 /*
2066  * lu_gp_id
2067  */
2068 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2069         struct t10_alua_lu_gp *lu_gp,
2070         char *page)
2071 {
2072         if (!lu_gp->lu_gp_valid_id)
2073                 return 0;
2074
2075         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2076 }
2077
2078 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2079         struct t10_alua_lu_gp *lu_gp,
2080         const char *page,
2081         size_t count)
2082 {
2083         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2084         unsigned long lu_gp_id;
2085         int ret;
2086
2087         ret = strict_strtoul(page, 0, &lu_gp_id);
2088         if (ret < 0) {
2089                 pr_err("strict_strtoul() returned %d for"
2090                         " lu_gp_id\n", ret);
2091                 return -EINVAL;
2092         }
2093         if (lu_gp_id > 0x0000ffff) {
2094                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2095                         " 0x0000ffff\n", lu_gp_id);
2096                 return -EINVAL;
2097         }
2098
2099         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2100         if (ret < 0)
2101                 return -EINVAL;
2102
2103         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2104                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2105                 config_item_name(&alua_lu_gp_cg->cg_item),
2106                 lu_gp->lu_gp_id);
2107
2108         return count;
2109 }
2110
2111 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2112
2113 /*
2114  * members
2115  */
2116 static ssize_t target_core_alua_lu_gp_show_attr_members(
2117         struct t10_alua_lu_gp *lu_gp,
2118         char *page)
2119 {
2120         struct se_device *dev;
2121         struct se_hba *hba;
2122         struct se_subsystem_dev *su_dev;
2123         struct t10_alua_lu_gp_member *lu_gp_mem;
2124         ssize_t len = 0, cur_len;
2125         unsigned char buf[LU_GROUP_NAME_BUF];
2126
2127         memset(buf, 0, LU_GROUP_NAME_BUF);
2128
2129         spin_lock(&lu_gp->lu_gp_lock);
2130         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2131                 dev = lu_gp_mem->lu_gp_mem_dev;
2132                 su_dev = dev->se_sub_dev;
2133                 hba = su_dev->se_dev_hba;
2134
2135                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2136                         config_item_name(&hba->hba_group.cg_item),
2137                         config_item_name(&su_dev->se_dev_group.cg_item));
2138                 cur_len++; /* Extra byte for NULL terminator */
2139
2140                 if ((cur_len + len) > PAGE_SIZE) {
2141                         pr_warn("Ran out of lu_gp_show_attr"
2142                                 "_members buffer\n");
2143                         break;
2144                 }
2145                 memcpy(page+len, buf, cur_len);
2146                 len += cur_len;
2147         }
2148         spin_unlock(&lu_gp->lu_gp_lock);
2149
2150         return len;
2151 }
2152
2153 SE_DEV_ALUA_LU_ATTR_RO(members);
2154
2155 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2156
2157 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2158         &target_core_alua_lu_gp_lu_gp_id.attr,
2159         &target_core_alua_lu_gp_members.attr,
2160         NULL,
2161 };
2162
2163 static void target_core_alua_lu_gp_release(struct config_item *item)
2164 {
2165         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2166                         struct t10_alua_lu_gp, lu_gp_group);
2167
2168         core_alua_free_lu_gp(lu_gp);
2169 }
2170
2171 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2172         .release                = target_core_alua_lu_gp_release,
2173         .show_attribute         = target_core_alua_lu_gp_attr_show,
2174         .store_attribute        = target_core_alua_lu_gp_attr_store,
2175 };
2176
2177 static struct config_item_type target_core_alua_lu_gp_cit = {
2178         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2179         .ct_attrs               = target_core_alua_lu_gp_attrs,
2180         .ct_owner               = THIS_MODULE,
2181 };
2182
2183 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2184
2185 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2186
2187 static struct config_group *target_core_alua_create_lu_gp(
2188         struct config_group *group,
2189         const char *name)
2190 {
2191         struct t10_alua_lu_gp *lu_gp;
2192         struct config_group *alua_lu_gp_cg = NULL;
2193         struct config_item *alua_lu_gp_ci = NULL;
2194
2195         lu_gp = core_alua_allocate_lu_gp(name, 0);
2196         if (IS_ERR(lu_gp))
2197                 return NULL;
2198
2199         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2200         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2201
2202         config_group_init_type_name(alua_lu_gp_cg, name,
2203                         &target_core_alua_lu_gp_cit);
2204
2205         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2206                 " Group: core/alua/lu_gps/%s\n",
2207                 config_item_name(alua_lu_gp_ci));
2208
2209         return alua_lu_gp_cg;
2210
2211 }
2212
2213 static void target_core_alua_drop_lu_gp(
2214         struct config_group *group,
2215         struct config_item *item)
2216 {
2217         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2218                         struct t10_alua_lu_gp, lu_gp_group);
2219
2220         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2221                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2222                 config_item_name(item), lu_gp->lu_gp_id);
2223         /*
2224          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2225          * -> target_core_alua_lu_gp_release()
2226          */
2227         config_item_put(item);
2228 }
2229
2230 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2231         .make_group             = &target_core_alua_create_lu_gp,
2232         .drop_item              = &target_core_alua_drop_lu_gp,
2233 };
2234
2235 static struct config_item_type target_core_alua_lu_gps_cit = {
2236         .ct_item_ops            = NULL,
2237         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2238         .ct_owner               = THIS_MODULE,
2239 };
2240
2241 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2242
2243 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2244
2245 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2246 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2247 static struct target_core_alua_tg_pt_gp_attribute                       \
2248                         target_core_alua_tg_pt_gp_##_name =             \
2249         __CONFIGFS_EATTR(_name, _mode,                                  \
2250         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2251         target_core_alua_tg_pt_gp_store_attr_##_name);
2252
2253 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2254 static struct target_core_alua_tg_pt_gp_attribute                       \
2255                         target_core_alua_tg_pt_gp_##_name =             \
2256         __CONFIGFS_EATTR_RO(_name,                                      \
2257         target_core_alua_tg_pt_gp_show_attr_##_name);
2258
2259 /*
2260  * alua_access_state
2261  */
2262 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2263         struct t10_alua_tg_pt_gp *tg_pt_gp,
2264         char *page)
2265 {
2266         return sprintf(page, "%d\n",
2267                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2268 }
2269
2270 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2271         struct t10_alua_tg_pt_gp *tg_pt_gp,
2272         const char *page,
2273         size_t count)
2274 {
2275         struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2276         unsigned long tmp;
2277         int new_state, ret;
2278
2279         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2280                 pr_err("Unable to do implict ALUA on non valid"
2281                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2282                 return -EINVAL;
2283         }
2284
2285         ret = strict_strtoul(page, 0, &tmp);
2286         if (ret < 0) {
2287                 pr_err("Unable to extract new ALUA access state from"
2288                                 " %s\n", page);
2289                 return -EINVAL;
2290         }
2291         new_state = (int)tmp;
2292
2293         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2294                 pr_err("Unable to process implict configfs ALUA"
2295                         " transition while TPGS_IMPLICT_ALUA is disabled\n");
2296                 return -EINVAL;
2297         }
2298
2299         ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2300                                         NULL, NULL, new_state, 0);
2301         return (!ret) ? count : -EINVAL;
2302 }
2303
2304 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2305
2306 /*
2307  * alua_access_status
2308  */
2309 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2310         struct t10_alua_tg_pt_gp *tg_pt_gp,
2311         char *page)
2312 {
2313         return sprintf(page, "%s\n",
2314                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2315 }
2316
2317 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2318         struct t10_alua_tg_pt_gp *tg_pt_gp,
2319         const char *page,
2320         size_t count)
2321 {
2322         unsigned long tmp;
2323         int new_status, ret;
2324
2325         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2326                 pr_err("Unable to do set ALUA access status on non"
2327                         " valid tg_pt_gp ID: %hu\n",
2328                         tg_pt_gp->tg_pt_gp_valid_id);
2329                 return -EINVAL;
2330         }
2331
2332         ret = strict_strtoul(page, 0, &tmp);
2333         if (ret < 0) {
2334                 pr_err("Unable to extract new ALUA access status"
2335                                 " from %s\n", page);
2336                 return -EINVAL;
2337         }
2338         new_status = (int)tmp;
2339
2340         if ((new_status != ALUA_STATUS_NONE) &&
2341             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2342             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2343                 pr_err("Illegal ALUA access status: 0x%02x\n",
2344                                 new_status);
2345                 return -EINVAL;
2346         }
2347
2348         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2349         return count;
2350 }
2351
2352 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2353
2354 /*
2355  * alua_access_type
2356  */
2357 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2358         struct t10_alua_tg_pt_gp *tg_pt_gp,
2359         char *page)
2360 {
2361         return core_alua_show_access_type(tg_pt_gp, page);
2362 }
2363
2364 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2365         struct t10_alua_tg_pt_gp *tg_pt_gp,
2366         const char *page,
2367         size_t count)
2368 {
2369         return core_alua_store_access_type(tg_pt_gp, page, count);
2370 }
2371
2372 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2373
2374 /*
2375  * alua_write_metadata
2376  */
2377 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2378         struct t10_alua_tg_pt_gp *tg_pt_gp,
2379         char *page)
2380 {
2381         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2382 }
2383
2384 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2385         struct t10_alua_tg_pt_gp *tg_pt_gp,
2386         const char *page,
2387         size_t count)
2388 {
2389         unsigned long tmp;
2390         int ret;
2391
2392         ret = strict_strtoul(page, 0, &tmp);
2393         if (ret < 0) {
2394                 pr_err("Unable to extract alua_write_metadata\n");
2395                 return -EINVAL;
2396         }
2397
2398         if ((tmp != 0) && (tmp != 1)) {
2399                 pr_err("Illegal value for alua_write_metadata:"
2400                         " %lu\n", tmp);
2401                 return -EINVAL;
2402         }
2403         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2404
2405         return count;
2406 }
2407
2408 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2409
2410
2411
2412 /*
2413  * nonop_delay_msecs
2414  */
2415 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2416         struct t10_alua_tg_pt_gp *tg_pt_gp,
2417         char *page)
2418 {
2419         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2420
2421 }
2422
2423 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2424         struct t10_alua_tg_pt_gp *tg_pt_gp,
2425         const char *page,
2426         size_t count)
2427 {
2428         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2429 }
2430
2431 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2432
2433 /*
2434  * trans_delay_msecs
2435  */
2436 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2437         struct t10_alua_tg_pt_gp *tg_pt_gp,
2438         char *page)
2439 {
2440         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2441 }
2442
2443 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2444         struct t10_alua_tg_pt_gp *tg_pt_gp,
2445         const char *page,
2446         size_t count)
2447 {
2448         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2449 }
2450
2451 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2452
2453 /*
2454  * preferred
2455  */
2456
2457 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2458         struct t10_alua_tg_pt_gp *tg_pt_gp,
2459         char *page)
2460 {
2461         return core_alua_show_preferred_bit(tg_pt_gp, page);
2462 }
2463
2464 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2465         struct t10_alua_tg_pt_gp *tg_pt_gp,
2466         const char *page,
2467         size_t count)
2468 {
2469         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2470 }
2471
2472 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2473
2474 /*
2475  * tg_pt_gp_id
2476  */
2477 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2478         struct t10_alua_tg_pt_gp *tg_pt_gp,
2479         char *page)
2480 {
2481         if (!tg_pt_gp->tg_pt_gp_valid_id)
2482                 return 0;
2483
2484         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2485 }
2486
2487 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2488         struct t10_alua_tg_pt_gp *tg_pt_gp,
2489         const char *page,
2490         size_t count)
2491 {
2492         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2493         unsigned long tg_pt_gp_id;
2494         int ret;
2495
2496         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2497         if (ret < 0) {
2498                 pr_err("strict_strtoul() returned %d for"
2499                         " tg_pt_gp_id\n", ret);
2500                 return -EINVAL;
2501         }
2502         if (tg_pt_gp_id > 0x0000ffff) {
2503                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2504                         " 0x0000ffff\n", tg_pt_gp_id);
2505                 return -EINVAL;
2506         }
2507
2508         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2509         if (ret < 0)
2510                 return -EINVAL;
2511
2512         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2513                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2514                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2515                 tg_pt_gp->tg_pt_gp_id);
2516
2517         return count;
2518 }
2519
2520 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2521
2522 /*
2523  * members
2524  */
2525 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2526         struct t10_alua_tg_pt_gp *tg_pt_gp,
2527         char *page)
2528 {
2529         struct se_port *port;
2530         struct se_portal_group *tpg;
2531         struct se_lun *lun;
2532         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2533         ssize_t len = 0, cur_len;
2534         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2535
2536         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2537
2538         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2539         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2540                         tg_pt_gp_mem_list) {
2541                 port = tg_pt_gp_mem->tg_pt;
2542                 tpg = port->sep_tpg;
2543                 lun = port->sep_lun;
2544
2545                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2546                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2547                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2548                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2549                         config_item_name(&lun->lun_group.cg_item));
2550                 cur_len++; /* Extra byte for NULL terminator */
2551
2552                 if ((cur_len + len) > PAGE_SIZE) {
2553                         pr_warn("Ran out of lu_gp_show_attr"
2554                                 "_members buffer\n");
2555                         break;
2556                 }
2557                 memcpy(page+len, buf, cur_len);
2558                 len += cur_len;
2559         }
2560         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2561
2562         return len;
2563 }
2564
2565 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2566
2567 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2568                         tg_pt_gp_group);
2569
2570 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2571         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2572         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2573         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2574         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2575         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2576         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2577         &target_core_alua_tg_pt_gp_preferred.attr,
2578         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2579         &target_core_alua_tg_pt_gp_members.attr,
2580         NULL,
2581 };
2582
2583 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2584 {
2585         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2586                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2587
2588         core_alua_free_tg_pt_gp(tg_pt_gp);
2589 }
2590
2591 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2592         .release                = target_core_alua_tg_pt_gp_release,
2593         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2594         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2595 };
2596
2597 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2598         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2599         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2600         .ct_owner               = THIS_MODULE,
2601 };
2602
2603 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2604
2605 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2606
2607 static struct config_group *target_core_alua_create_tg_pt_gp(
2608         struct config_group *group,
2609         const char *name)
2610 {
2611         struct t10_alua *alua = container_of(group, struct t10_alua,
2612                                         alua_tg_pt_gps_group);
2613         struct t10_alua_tg_pt_gp *tg_pt_gp;
2614         struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2615         struct config_group *alua_tg_pt_gp_cg = NULL;
2616         struct config_item *alua_tg_pt_gp_ci = NULL;
2617
2618         tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2619         if (!tg_pt_gp)
2620                 return NULL;
2621
2622         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2623         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2624
2625         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2626                         &target_core_alua_tg_pt_gp_cit);
2627
2628         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2629                 " Group: alua/tg_pt_gps/%s\n",
2630                 config_item_name(alua_tg_pt_gp_ci));
2631
2632         return alua_tg_pt_gp_cg;
2633 }
2634
2635 static void target_core_alua_drop_tg_pt_gp(
2636         struct config_group *group,
2637         struct config_item *item)
2638 {
2639         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2640                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2641
2642         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2643                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2644                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2645         /*
2646          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2647          * -> target_core_alua_tg_pt_gp_release().
2648          */
2649         config_item_put(item);
2650 }
2651
2652 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2653         .make_group             = &target_core_alua_create_tg_pt_gp,
2654         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2655 };
2656
2657 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2658         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2659         .ct_owner               = THIS_MODULE,
2660 };
2661
2662 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2663
2664 /* Start functions for struct config_item_type target_core_alua_cit */
2665
2666 /*
2667  * target_core_alua_cit is a ConfigFS group that lives under
2668  * /sys/kernel/config/target/core/alua.  There are default groups
2669  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2670  * target_core_alua_cit in target_core_init_configfs() below.
2671  */
2672 static struct config_item_type target_core_alua_cit = {
2673         .ct_item_ops            = NULL,
2674         .ct_attrs               = NULL,
2675         .ct_owner               = THIS_MODULE,
2676 };
2677
2678 /* End functions for struct config_item_type target_core_alua_cit */
2679
2680 /* Start functions for struct config_item_type target_core_stat_cit */
2681
2682 static struct config_group *target_core_stat_mkdir(
2683         struct config_group *group,
2684         const char *name)
2685 {
2686         return ERR_PTR(-ENOSYS);
2687 }
2688
2689 static void target_core_stat_rmdir(
2690         struct config_group *group,
2691         struct config_item *item)
2692 {
2693         return;
2694 }
2695
2696 static struct configfs_group_operations target_core_stat_group_ops = {
2697         .make_group             = &target_core_stat_mkdir,
2698         .drop_item              = &target_core_stat_rmdir,
2699 };
2700
2701 static struct config_item_type target_core_stat_cit = {
2702         .ct_group_ops           = &target_core_stat_group_ops,
2703         .ct_owner               = THIS_MODULE,
2704 };
2705
2706 /* End functions for struct config_item_type target_core_stat_cit */
2707
2708 /* Start functions for struct config_item_type target_core_hba_cit */
2709
2710 static struct config_group *target_core_make_subdev(
2711         struct config_group *group,
2712         const char *name)
2713 {
2714         struct t10_alua_tg_pt_gp *tg_pt_gp;
2715         struct se_subsystem_dev *se_dev;
2716         struct se_subsystem_api *t;
2717         struct config_item *hba_ci = &group->cg_item;
2718         struct se_hba *hba = item_to_hba(hba_ci);
2719         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2720         struct config_group *dev_stat_grp = NULL;
2721         int errno = -ENOMEM, ret;
2722
2723         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2724         if (ret)
2725                 return ERR_PTR(ret);
2726         /*
2727          * Locate the struct se_subsystem_api from parent's struct se_hba.
2728          */
2729         t = hba->transport;
2730
2731         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2732         if (!se_dev) {
2733                 pr_err("Unable to allocate memory for"
2734                                 " struct se_subsystem_dev\n");
2735                 goto unlock;
2736         }
2737         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2738         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2739         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2740         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2741         spin_lock_init(&se_dev->t10_pr.registration_lock);
2742         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2743         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2744         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2745         spin_lock_init(&se_dev->se_dev_lock);
2746         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2747         se_dev->t10_wwn.t10_sub_dev = se_dev;
2748         se_dev->t10_alua.t10_sub_dev = se_dev;
2749         se_dev->se_dev_attrib.da_sub_dev = se_dev;
2750
2751         se_dev->se_dev_hba = hba;
2752         dev_cg = &se_dev->se_dev_group;
2753
2754         dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2755                         GFP_KERNEL);
2756         if (!dev_cg->default_groups)
2757                 goto out;
2758         /*
2759          * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2760          * for ->allocate_virtdevice()
2761          *
2762          * se_dev->se_dev_ptr will be set after ->create_virtdev()
2763          * has been called successfully in the next level up in the
2764          * configfs tree for device object's struct config_group.
2765          */
2766         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2767         if (!se_dev->se_dev_su_ptr) {
2768                 pr_err("Unable to locate subsystem dependent pointer"
2769                         " from allocate_virtdevice()\n");
2770                 goto out;
2771         }
2772
2773         config_group_init_type_name(&se_dev->se_dev_group, name,
2774                         &target_core_dev_cit);
2775         config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2776                         &target_core_dev_attrib_cit);
2777         config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2778                         &target_core_dev_pr_cit);
2779         config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2780                         &target_core_dev_wwn_cit);
2781         config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2782                         "alua", &target_core_alua_tg_pt_gps_cit);
2783         config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2784                         "statistics", &target_core_stat_cit);
2785
2786         dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2787         dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2788         dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2789         dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2790         dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2791         dev_cg->default_groups[5] = NULL;
2792         /*
2793          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2794          */
2795         tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2796         if (!tg_pt_gp)
2797                 goto out;
2798
2799         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2800         tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2801                                 GFP_KERNEL);
2802         if (!tg_pt_gp_cg->default_groups) {
2803                 pr_err("Unable to allocate tg_pt_gp_cg->"
2804                                 "default_groups\n");
2805                 goto out;
2806         }
2807
2808         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2809                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2810         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2811         tg_pt_gp_cg->default_groups[1] = NULL;
2812         se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2813         /*
2814          * Add core/$HBA/$DEV/statistics/ default groups
2815          */
2816         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2817         dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2818                                 GFP_KERNEL);
2819         if (!dev_stat_grp->default_groups) {
2820                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2821                 goto out;
2822         }
2823         target_stat_setup_dev_default_groups(se_dev);
2824
2825         pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2826                 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2827
2828         mutex_unlock(&hba->hba_access_mutex);
2829         return &se_dev->se_dev_group;
2830 out:
2831         if (se_dev->t10_alua.default_tg_pt_gp) {
2832                 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2833                 se_dev->t10_alua.default_tg_pt_gp = NULL;
2834         }
2835         if (dev_stat_grp)
2836                 kfree(dev_stat_grp->default_groups);
2837         if (tg_pt_gp_cg)
2838                 kfree(tg_pt_gp_cg->default_groups);
2839         if (dev_cg)
2840                 kfree(dev_cg->default_groups);
2841         if (se_dev->se_dev_su_ptr)
2842                 t->free_device(se_dev->se_dev_su_ptr);
2843         kfree(se_dev);
2844 unlock:
2845         mutex_unlock(&hba->hba_access_mutex);
2846         return ERR_PTR(errno);
2847 }
2848
2849 static void target_core_drop_subdev(
2850         struct config_group *group,
2851         struct config_item *item)
2852 {
2853         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2854                                 struct se_subsystem_dev, se_dev_group);
2855         struct se_hba *hba;
2856         struct config_item *df_item;
2857         struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2858         int i;
2859
2860         hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2861
2862         mutex_lock(&hba->hba_access_mutex);
2863
2864         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2865         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2866                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2867                 dev_stat_grp->default_groups[i] = NULL;
2868                 config_item_put(df_item);
2869         }
2870         kfree(dev_stat_grp->default_groups);
2871
2872         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2873         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2874                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2875                 tg_pt_gp_cg->default_groups[i] = NULL;
2876                 config_item_put(df_item);
2877         }
2878         kfree(tg_pt_gp_cg->default_groups);
2879         /*
2880          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2881          * directly from target_core_alua_tg_pt_gp_release().
2882          */
2883         se_dev->t10_alua.default_tg_pt_gp = NULL;
2884
2885         dev_cg = &se_dev->se_dev_group;
2886         for (i = 0; dev_cg->default_groups[i]; i++) {
2887                 df_item = &dev_cg->default_groups[i]->cg_item;
2888                 dev_cg->default_groups[i] = NULL;
2889                 config_item_put(df_item);
2890         }
2891         /*
2892          * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2893          * from target_core_dev_item_ops->release() ->target_core_dev_release().
2894          */
2895         config_item_put(item);
2896         mutex_unlock(&hba->hba_access_mutex);
2897 }
2898
2899 static struct configfs_group_operations target_core_hba_group_ops = {
2900         .make_group             = target_core_make_subdev,
2901         .drop_item              = target_core_drop_subdev,
2902 };
2903
2904 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2905 #define SE_HBA_ATTR(_name, _mode)                               \
2906 static struct target_core_hba_attribute                         \
2907                 target_core_hba_##_name =                       \
2908                 __CONFIGFS_EATTR(_name, _mode,                  \
2909                 target_core_hba_show_attr_##_name,              \
2910                 target_core_hba_store_attr_##_name);
2911
2912 #define SE_HBA_ATTR_RO(_name)                                   \
2913 static struct target_core_hba_attribute                         \
2914                 target_core_hba_##_name =                       \
2915                 __CONFIGFS_EATTR_RO(_name,                      \
2916                 target_core_hba_show_attr_##_name);
2917
2918 static ssize_t target_core_hba_show_attr_hba_info(
2919         struct se_hba *hba,
2920         char *page)
2921 {
2922         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2923                         hba->hba_id, hba->transport->name,
2924                         TARGET_CORE_CONFIGFS_VERSION);
2925 }
2926
2927 SE_HBA_ATTR_RO(hba_info);
2928
2929 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2930                                 char *page)
2931 {
2932         int hba_mode = 0;
2933
2934         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2935                 hba_mode = 1;
2936
2937         return sprintf(page, "%d\n", hba_mode);
2938 }
2939
2940 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2941                                 const char *page, size_t count)
2942 {
2943         struct se_subsystem_api *transport = hba->transport;
2944         unsigned long mode_flag;
2945         int ret;
2946
2947         if (transport->pmode_enable_hba == NULL)
2948                 return -EINVAL;
2949
2950         ret = strict_strtoul(page, 0, &mode_flag);
2951         if (ret < 0) {
2952                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2953                 return -EINVAL;
2954         }
2955
2956         spin_lock(&hba->device_lock);
2957         if (!list_empty(&hba->hba_dev_list)) {
2958                 pr_err("Unable to set hba_mode with active devices\n");
2959                 spin_unlock(&hba->device_lock);
2960                 return -EINVAL;
2961         }
2962         spin_unlock(&hba->device_lock);
2963
2964         ret = transport->pmode_enable_hba(hba, mode_flag);
2965         if (ret < 0)
2966                 return -EINVAL;
2967         if (ret > 0)
2968                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2969         else if (ret == 0)
2970                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2971
2972         return count;
2973 }
2974
2975 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2976
2977 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2978
2979 static void target_core_hba_release(struct config_item *item)
2980 {
2981         struct se_hba *hba = container_of(to_config_group(item),
2982                                 struct se_hba, hba_group);
2983         core_delete_hba(hba);
2984 }
2985
2986 static struct configfs_attribute *target_core_hba_attrs[] = {
2987         &target_core_hba_hba_info.attr,
2988         &target_core_hba_hba_mode.attr,
2989         NULL,
2990 };
2991
2992 static struct configfs_item_operations target_core_hba_item_ops = {
2993         .release                = target_core_hba_release,
2994         .show_attribute         = target_core_hba_attr_show,
2995         .store_attribute        = target_core_hba_attr_store,
2996 };
2997
2998 static struct config_item_type target_core_hba_cit = {
2999         .ct_item_ops            = &target_core_hba_item_ops,
3000         .ct_group_ops           = &target_core_hba_group_ops,
3001         .ct_attrs               = target_core_hba_attrs,
3002         .ct_owner               = THIS_MODULE,
3003 };
3004
3005 static struct config_group *target_core_call_addhbatotarget(
3006         struct config_group *group,
3007         const char *name)
3008 {
3009         char *se_plugin_str, *str, *str2;
3010         struct se_hba *hba;
3011         char buf[TARGET_CORE_NAME_MAX_LEN];
3012         unsigned long plugin_dep_id = 0;
3013         int ret;
3014
3015         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3016         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3017                 pr_err("Passed *name strlen(): %d exceeds"
3018                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3019                         TARGET_CORE_NAME_MAX_LEN);
3020                 return ERR_PTR(-ENAMETOOLONG);
3021         }
3022         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3023
3024         str = strstr(buf, "_");
3025         if (!str) {
3026                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3027                 return ERR_PTR(-EINVAL);
3028         }
3029         se_plugin_str = buf;
3030         /*
3031          * Special case for subsystem plugins that have "_" in their names.
3032          * Namely rd_direct and rd_mcp..
3033          */
3034         str2 = strstr(str+1, "_");
3035         if (str2) {
3036                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3037                 str2++; /* Skip to start of plugin dependent ID */
3038                 str = str2;
3039         } else {
3040                 *str = '\0'; /* Terminate for *se_plugin_str */
3041                 str++; /* Skip to start of plugin dependent ID */
3042         }
3043
3044         ret = strict_strtoul(str, 0, &plugin_dep_id);
3045         if (ret < 0) {
3046                 pr_err("strict_strtoul() returned %d for"
3047                                 " plugin_dep_id\n", ret);
3048                 return ERR_PTR(-EINVAL);
3049         }
3050         /*
3051          * Load up TCM subsystem plugins if they have not already been loaded.
3052          */
3053         transport_subsystem_check_init();
3054
3055         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3056         if (IS_ERR(hba))
3057                 return ERR_CAST(hba);
3058
3059         config_group_init_type_name(&hba->hba_group, name,
3060                         &target_core_hba_cit);
3061
3062         return &hba->hba_group;
3063 }
3064
3065 static void target_core_call_delhbafromtarget(
3066         struct config_group *group,
3067         struct config_item *item)
3068 {
3069         /*
3070          * core_delete_hba() is called from target_core_hba_item_ops->release()
3071          * -> target_core_hba_release()
3072          */
3073         config_item_put(item);
3074 }
3075
3076 static struct configfs_group_operations target_core_group_ops = {
3077         .make_group     = target_core_call_addhbatotarget,
3078         .drop_item      = target_core_call_delhbafromtarget,
3079 };
3080
3081 static struct config_item_type target_core_cit = {
3082         .ct_item_ops    = NULL,
3083         .ct_group_ops   = &target_core_group_ops,
3084         .ct_attrs       = NULL,
3085         .ct_owner       = THIS_MODULE,
3086 };
3087
3088 /* Stop functions for struct config_item_type target_core_hba_cit */
3089
3090 static int __init target_core_init_configfs(void)
3091 {
3092         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3093         struct config_group *lu_gp_cg = NULL;
3094         struct configfs_subsystem *subsys;
3095         struct t10_alua_lu_gp *lu_gp;
3096         int ret;
3097
3098         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3099                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3100                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3101
3102         subsys = target_core_subsystem[0];
3103         config_group_init(&subsys->su_group);
3104         mutex_init(&subsys->su_mutex);
3105
3106         ret = init_se_kmem_caches();
3107         if (ret < 0)
3108                 return ret;
3109         /*
3110          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3111          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3112          */
3113         target_cg = &subsys->su_group;
3114         target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3115                                 GFP_KERNEL);
3116         if (!target_cg->default_groups) {
3117                 pr_err("Unable to allocate target_cg->default_groups\n");
3118                 goto out_global;
3119         }
3120
3121         config_group_init_type_name(&target_core_hbagroup,
3122                         "core", &target_core_cit);
3123         target_cg->default_groups[0] = &target_core_hbagroup;
3124         target_cg->default_groups[1] = NULL;
3125         /*
3126          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3127          */
3128         hba_cg = &target_core_hbagroup;
3129         hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3130                                 GFP_KERNEL);
3131         if (!hba_cg->default_groups) {
3132                 pr_err("Unable to allocate hba_cg->default_groups\n");
3133                 goto out_global;
3134         }
3135         config_group_init_type_name(&alua_group,
3136                         "alua", &target_core_alua_cit);
3137         hba_cg->default_groups[0] = &alua_group;
3138         hba_cg->default_groups[1] = NULL;
3139         /*
3140          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3141          * groups under /sys/kernel/config/target/core/alua/
3142          */
3143         alua_cg = &alua_group;
3144         alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3145                         GFP_KERNEL);
3146         if (!alua_cg->default_groups) {
3147                 pr_err("Unable to allocate alua_cg->default_groups\n");
3148                 goto out_global;
3149         }
3150
3151         config_group_init_type_name(&alua_lu_gps_group,
3152                         "lu_gps", &target_core_alua_lu_gps_cit);
3153         alua_cg->default_groups[0] = &alua_lu_gps_group;
3154         alua_cg->default_groups[1] = NULL;
3155         /*
3156          * Add core/alua/lu_gps/default_lu_gp
3157          */
3158         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3159         if (IS_ERR(lu_gp))
3160                 goto out_global;
3161
3162         lu_gp_cg = &alua_lu_gps_group;
3163         lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3164                         GFP_KERNEL);
3165         if (!lu_gp_cg->default_groups) {
3166                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3167                 goto out_global;
3168         }
3169
3170         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3171                                 &target_core_alua_lu_gp_cit);
3172         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3173         lu_gp_cg->default_groups[1] = NULL;
3174         default_lu_gp = lu_gp;
3175         /*
3176          * Register the target_core_mod subsystem with configfs.
3177          */
3178         ret = configfs_register_subsystem(subsys);
3179         if (ret < 0) {
3180                 pr_err("Error %d while registering subsystem %s\n",
3181                         ret, subsys->su_group.cg_item.ci_namebuf);
3182                 goto out_global;
3183         }
3184         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3185                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3186                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3187         /*
3188          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3189          */
3190         ret = rd_module_init();
3191         if (ret < 0)
3192                 goto out;
3193
3194         if (core_dev_setup_virtual_lun0() < 0)
3195                 goto out;
3196
3197         return 0;
3198
3199 out:
3200         configfs_unregister_subsystem(subsys);
3201         core_dev_release_virtual_lun0();
3202         rd_module_exit();
3203 out_global:
3204         if (default_lu_gp) {
3205                 core_alua_free_lu_gp(default_lu_gp);
3206                 default_lu_gp = NULL;
3207         }
3208         if (lu_gp_cg)
3209                 kfree(lu_gp_cg->default_groups);
3210         if (alua_cg)
3211                 kfree(alua_cg->default_groups);
3212         if (hba_cg)
3213                 kfree(hba_cg->default_groups);
3214         kfree(target_cg->default_groups);
3215         release_se_kmem_caches();
3216         return ret;
3217 }
3218
3219 static void __exit target_core_exit_configfs(void)
3220 {
3221         struct configfs_subsystem *subsys;
3222         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3223         struct config_item *item;
3224         int i;
3225
3226         subsys = target_core_subsystem[0];
3227
3228         lu_gp_cg = &alua_lu_gps_group;
3229         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3230                 item = &lu_gp_cg->default_groups[i]->cg_item;
3231                 lu_gp_cg->default_groups[i] = NULL;
3232                 config_item_put(item);
3233         }
3234         kfree(lu_gp_cg->default_groups);
3235         lu_gp_cg->default_groups = NULL;
3236
3237         alua_cg = &alua_group;
3238         for (i = 0; alua_cg->default_groups[i]; i++) {
3239                 item = &alua_cg->default_groups[i]->cg_item;
3240                 alua_cg->default_groups[i] = NULL;
3241                 config_item_put(item);
3242         }
3243         kfree(alua_cg->default_groups);
3244         alua_cg->default_groups = NULL;
3245
3246         hba_cg = &target_core_hbagroup;
3247         for (i = 0; hba_cg->default_groups[i]; i++) {
3248                 item = &hba_cg->default_groups[i]->cg_item;
3249                 hba_cg->default_groups[i] = NULL;
3250                 config_item_put(item);
3251         }
3252         kfree(hba_cg->default_groups);
3253         hba_cg->default_groups = NULL;
3254         /*
3255          * We expect subsys->su_group.default_groups to be released
3256          * by configfs subsystem provider logic..
3257          */
3258         configfs_unregister_subsystem(subsys);
3259         kfree(subsys->su_group.default_groups);
3260
3261         core_alua_free_lu_gp(default_lu_gp);
3262         default_lu_gp = NULL;
3263
3264         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3265                         " Infrastructure\n");
3266
3267         core_dev_release_virtual_lun0();
3268         rd_module_exit();
3269         release_se_kmem_caches();
3270 }
3271
3272 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3273 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3274 MODULE_LICENSE("GPL");
3275
3276 module_init(target_core_init_configfs);
3277 module_exit(target_core_exit_configfs);