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_device.h>
  43 #include <target/target_core_transport.h>
  44 #include <target/target_core_fabric_ops.h>
  45 #include <target/target_core_fabric_configfs.h>
  46 #include <target/target_core_configfs.h>
  47 #include <target/configfs_macros.h>
  48
  49 #include "target_core_alua.h"
  50 #include "target_core_hba.h"
  51 #include "target_core_pr.h"
  52 #include "target_core_rd.h"
  53 #include "target_core_stat.h"
  54
  55 extern struct t10_alua_lu_gp *default_lu_gp;
  56
  57 static struct list_head g_tf_list;
  58 static struct mutex g_tf_lock;
  59
  60 struct target_core_configfs_attribute {
  61         struct configfs_attribute attr;
  62         ssize_t (*show)(void *, char *);
  63         ssize_t (*store)(void *, const char *, size_t);
  64 };
  65
  66 static struct config_group target_core_hbagroup;
  67 static struct config_group alua_group;
  68 static struct config_group alua_lu_gps_group;
  69
  70 static inline struct se_hba *
  71 item_to_hba(struct config_item *item)
  72 {
  73         return container_of(to_config_group(item), struct se_hba, hba_group);
  74 }
  75
  76 /*
  77  * Attributes for /sys/kernel/config/target/
  78  */
  79 static ssize_t target_core_attr_show(struct config_item *item,
  80                                       struct configfs_attribute *attr,
  81                                       char *page)
  82 {
  83         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  84                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  85                 utsname()->sysname, utsname()->machine);
  86 }
  87
  88 static struct configfs_item_operations target_core_fabric_item_ops = {
  89         .show_attribute = target_core_attr_show,
  90 };
  91
  92 static struct configfs_attribute target_core_item_attr_version = {
  93         .ca_owner       = THIS_MODULE,
  94         .ca_name        = "version",
  95         .ca_mode        = S_IRUGO,
  96 };
  97
  98 static struct target_fabric_configfs *target_core_get_fabric(
  99         const char *name)
 100 {
 101         struct target_fabric_configfs *tf;
 102
 103         if (!name)
 104                 return NULL;
 105
 106         mutex_lock(&g_tf_lock);
 107         list_for_each_entry(tf, &g_tf_list, tf_list) {
 108                 if (!strcmp(tf->tf_name, name)) {
 109                         atomic_inc(&tf->tf_access_cnt);
 110                         mutex_unlock(&g_tf_lock);
 111                         return tf;
 112                 }
 113         }
 114         mutex_unlock(&g_tf_lock);
 115
 116         return NULL;
 117 }
 118
 119 /*
 120  * Called from struct target_core_group_ops->make_group()
 121  */
 122 static struct config_group *target_core_register_fabric(
 123         struct config_group *group,
 124         const char *name)
 125 {
 126         struct target_fabric_configfs *tf;
 127         int ret;
 128
 129         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 130                         " %s\n", group, name);
 131         /*
 132          * Below are some hardcoded request_module() calls to automatically
 133          * local fabric modules when the following is called:
 134          *
 135          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 136          *
 137          * Note that this does not limit which TCM fabric module can be
 138          * registered, but simply provids auto loading logic for modules with
 139          * mkdir(2) system calls with known TCM fabric modules.
 140          */
 141         if (!strncmp(name, "iscsi", 5)) {
 142                 /*
 143                  * Automatically load the LIO Target fabric module when the
 144                  * following is called:
 145                  *
 146                  * mkdir -p $CONFIGFS/target/iscsi
 147                  */
 148                 ret = request_module("iscsi_target_mod");
 149                 if (ret < 0) {
 150                         pr_err("request_module() failed for"
 151                                 " iscsi_target_mod.ko: %d\n", ret);
 152                         return ERR_PTR(-EINVAL);
 153                 }
 154         } else if (!strncmp(name, "loopback", 8)) {
 155                 /*
 156                  * Automatically load the tcm_loop fabric module when the
 157                  * following is called:
 158                  *
 159                  * mkdir -p $CONFIGFS/target/loopback
 160                  */
 161                 ret = request_module("tcm_loop");
 162                 if (ret < 0) {
 163                         pr_err("request_module() failed for"
 164                                 " tcm_loop.ko: %d\n", ret);
 165                         return ERR_PTR(-EINVAL);
 166                 }
 167         }
 168
 169         tf = target_core_get_fabric(name);
 170         if (!tf) {
 171                 pr_err("target_core_get_fabric() failed for %s\n",
 172                         name);
 173                 return ERR_PTR(-EINVAL);
 174         }
 175         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 176                         " %s\n", tf->tf_name);
 177         /*
 178          * On a successful target_core_get_fabric() look, the returned
 179          * struct target_fabric_configfs *tf will contain a usage reference.
 180          */
 181         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 182                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 183
 184         tf->tf_group.default_groups = tf->tf_default_groups;
 185         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 186         tf->tf_group.default_groups[1] = NULL;
 187
 188         config_group_init_type_name(&tf->tf_group, name,
 189                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 190         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 191                         &TF_CIT_TMPL(tf)->tfc_discovery_cit);
 192
 193         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 194                         " %s\n", tf->tf_group.cg_item.ci_name);
 195         /*
 196          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 197          */
 198         tf->tf_ops.tf_subsys = tf->tf_subsys;
 199         tf->tf_fabric = &tf->tf_group.cg_item;
 200         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 201                         " for %s\n", name);
 202
 203         return &tf->tf_group;
 204 }
 205
 206 /*
 207  * Called from struct target_core_group_ops->drop_item()
 208  */
 209 static void target_core_deregister_fabric(
 210         struct config_group *group,
 211         struct config_item *item)
 212 {
 213         struct target_fabric_configfs *tf = container_of(
 214                 to_config_group(item), struct target_fabric_configfs, tf_group);
 215         struct config_group *tf_group;
 216         struct config_item *df_item;
 217         int i;
 218
 219         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 220                 " tf list\n", config_item_name(item));
 221
 222         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 223                         " %s\n", tf->tf_name);
 224         atomic_dec(&tf->tf_access_cnt);
 225
 226         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 227                         " tf->tf_fabric for %s\n", tf->tf_name);
 228         tf->tf_fabric = NULL;
 229
 230         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 231                         " %s\n", config_item_name(item));
 232
 233         tf_group = &tf->tf_group;
 234         for (i = 0; tf_group->default_groups[i]; i++) {
 235                 df_item = &tf_group->default_groups[i]->cg_item;
 236                 tf_group->default_groups[i] = NULL;
 237                 config_item_put(df_item);
 238         }
 239         config_item_put(item);
 240 }
 241
 242 static struct configfs_group_operations target_core_fabric_group_ops = {
 243         .make_group     = &target_core_register_fabric,
 244         .drop_item      = &target_core_deregister_fabric,
 245 };
 246
 247 /*
 248  * All item attributes appearing in /sys/kernel/target/ appear here.
 249  */
 250 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 251         &target_core_item_attr_version,
 252         NULL,
 253 };
 254
 255 /*
 256  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 257  */
 258 static struct config_item_type target_core_fabrics_item = {
 259         .ct_item_ops    = &target_core_fabric_item_ops,
 260         .ct_group_ops   = &target_core_fabric_group_ops,
 261         .ct_attrs       = target_core_fabric_item_attrs,
 262         .ct_owner       = THIS_MODULE,
 263 };
 264
 265 static struct configfs_subsystem target_core_fabrics = {
 266         .su_group = {
 267                 .cg_item = {
 268                         .ci_namebuf = "target",
 269                         .ci_type = &target_core_fabrics_item,
 270                 },
 271         },
 272 };
 273
 274 static struct configfs_subsystem *target_core_subsystem[] = {
 275         &target_core_fabrics,
 276         NULL,
 277 };
 278
 279 /*##############################################################################
 280 // Start functions called by external Target Fabrics Modules
 281 //############################################################################*/
 282
 283 /*
 284  * First function called by fabric modules to:
 285  *
 286  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 287  * 2) Add struct target_fabric_configfs to g_tf_list
 288  * 3) Return struct target_fabric_configfs to fabric module to be passed
 289  *    into target_fabric_configfs_register().
 290  */
 291 struct target_fabric_configfs *target_fabric_configfs_init(
 292         struct module *fabric_mod,
 293         const char *name)
 294 {
 295         struct target_fabric_configfs *tf;
 296
 297         if (!(name)) {
 298                 pr_err("Unable to locate passed fabric name\n");
 299                 return ERR_PTR(-EINVAL);
 300         }
 301         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 302                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 303                         "_NAME_SIZE\n", name);
 304                 return ERR_PTR(-EINVAL);
 305         }
 306
 307         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 308         if (!tf)
 309                 return ERR_PTR(-ENOMEM);
 310
 311         INIT_LIST_HEAD(&tf->tf_list);
 312         atomic_set(&tf->tf_access_cnt, 0);
 313         /*
 314          * Setup the default generic struct config_item_type's (cits) in
 315          * struct target_fabric_configfs->tf_cit_tmpl
 316          */
 317         tf->tf_module = fabric_mod;
 318         target_fabric_setup_cits(tf);
 319
 320         tf->tf_subsys = target_core_subsystem[0];
 321         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 322
 323         mutex_lock(&g_tf_lock);
 324         list_add_tail(&tf->tf_list, &g_tf_list);
 325         mutex_unlock(&g_tf_lock);
 326
 327         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 328                         ">>>>>>>>>>>>>>\n");
 329         pr_debug("Initialized struct target_fabric_configfs: %p for"
 330                         " %s\n", tf, tf->tf_name);
 331         return tf;
 332 }
 333 EXPORT_SYMBOL(target_fabric_configfs_init);
 334
 335 /*
 336  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 337  */
 338 void target_fabric_configfs_free(
 339         struct target_fabric_configfs *tf)
 340 {
 341         mutex_lock(&g_tf_lock);
 342         list_del(&tf->tf_list);
 343         mutex_unlock(&g_tf_lock);
 344
 345         kfree(tf);
 346 }
 347 EXPORT_SYMBOL(target_fabric_configfs_free);
 348
 349 /*
 350  * Perform a sanity check of the passed tf->tf_ops before completing
 351  * TCM fabric module registration.
 352  */
 353 static int target_fabric_tf_ops_check(
 354         struct target_fabric_configfs *tf)
 355 {
 356         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 357
 358         if (!tfo->get_fabric_name) {
 359                 pr_err("Missing tfo->get_fabric_name()\n");
 360                 return -EINVAL;
 361         }
 362         if (!tfo->get_fabric_proto_ident) {
 363                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 364                 return -EINVAL;
 365         }
 366         if (!tfo->tpg_get_wwn) {
 367                 pr_err("Missing tfo->tpg_get_wwn()\n");
 368                 return -EINVAL;
 369         }
 370         if (!tfo->tpg_get_tag) {
 371                 pr_err("Missing tfo->tpg_get_tag()\n");
 372                 return -EINVAL;
 373         }
 374         if (!tfo->tpg_get_default_depth) {
 375                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 376                 return -EINVAL;
 377         }
 378         if (!tfo->tpg_get_pr_transport_id) {
 379                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 380                 return -EINVAL;
 381         }
 382         if (!tfo->tpg_get_pr_transport_id_len) {
 383                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 384                 return -EINVAL;
 385         }
 386         if (!tfo->tpg_check_demo_mode) {
 387                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 388                 return -EINVAL;
 389         }
 390         if (!tfo->tpg_check_demo_mode_cache) {
 391                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 392                 return -EINVAL;
 393         }
 394         if (!tfo->tpg_check_demo_mode_write_protect) {
 395                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 396                 return -EINVAL;
 397         }
 398         if (!tfo->tpg_check_prod_mode_write_protect) {
 399                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 400                 return -EINVAL;
 401         }
 402         if (!tfo->tpg_alloc_fabric_acl) {
 403                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 404                 return -EINVAL;
 405         }
 406         if (!tfo->tpg_release_fabric_acl) {
 407                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 408                 return -EINVAL;
 409         }
 410         if (!tfo->tpg_get_inst_index) {
 411                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 412                 return -EINVAL;
 413         }
 414         if (!tfo->release_cmd) {
 415                 pr_err("Missing tfo->release_cmd()\n");
 416                 return -EINVAL;
 417         }
 418         if (!tfo->shutdown_session) {
 419                 pr_err("Missing tfo->shutdown_session()\n");
 420                 return -EINVAL;
 421         }
 422         if (!tfo->close_session) {
 423                 pr_err("Missing tfo->close_session()\n");
 424                 return -EINVAL;
 425         }
 426         if (!tfo->stop_session) {
 427                 pr_err("Missing tfo->stop_session()\n");
 428                 return -EINVAL;
 429         }
 430         if (!tfo->fall_back_to_erl0) {
 431                 pr_err("Missing tfo->fall_back_to_erl0()\n");
 432                 return -EINVAL;
 433         }
 434         if (!tfo->sess_logged_in) {
 435                 pr_err("Missing tfo->sess_logged_in()\n");
 436                 return -EINVAL;
 437         }
 438         if (!tfo->sess_get_index) {
 439                 pr_err("Missing tfo->sess_get_index()\n");
 440                 return -EINVAL;
 441         }
 442         if (!tfo->write_pending) {
 443                 pr_err("Missing tfo->write_pending()\n");
 444                 return -EINVAL;
 445         }
 446         if (!tfo->write_pending_status) {
 447                 pr_err("Missing tfo->write_pending_status()\n");
 448                 return -EINVAL;
 449         }
 450         if (!tfo->set_default_node_attributes) {
 451                 pr_err("Missing tfo->set_default_node_attributes()\n");
 452                 return -EINVAL;
 453         }
 454         if (!tfo->get_task_tag) {
 455                 pr_err("Missing tfo->get_task_tag()\n");
 456                 return -EINVAL;
 457         }
 458         if (!tfo->get_cmd_state) {
 459                 pr_err("Missing tfo->get_cmd_state()\n");
 460                 return -EINVAL;
 461         }
 462         if (!tfo->queue_data_in) {
 463                 pr_err("Missing tfo->queue_data_in()\n");
 464                 return -EINVAL;
 465         }
 466         if (!tfo->queue_status) {
 467                 pr_err("Missing tfo->queue_status()\n");
 468                 return -EINVAL;
 469         }
 470         if (!tfo->queue_tm_rsp) {
 471                 pr_err("Missing tfo->queue_tm_rsp()\n");
 472                 return -EINVAL;
 473         }
 474         if (!tfo->set_fabric_sense_len) {
 475                 pr_err("Missing tfo->set_fabric_sense_len()\n");
 476                 return -EINVAL;
 477         }
 478         if (!tfo->get_fabric_sense_len) {
 479                 pr_err("Missing tfo->get_fabric_sense_len()\n");
 480                 return -EINVAL;
 481         }
 482         if (!tfo->is_state_remove) {
 483                 pr_err("Missing tfo->is_state_remove()\n");
 484                 return -EINVAL;
 485         }
 486         /*
 487          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 488          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 489          * target_core_fabric_configfs.c WWN+TPG group context code.
 490          */
 491         if (!tfo->fabric_make_wwn) {
 492                 pr_err("Missing tfo->fabric_make_wwn()\n");
 493                 return -EINVAL;
 494         }
 495         if (!tfo->fabric_drop_wwn) {
 496                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 497                 return -EINVAL;
 498         }
 499         if (!tfo->fabric_make_tpg) {
 500                 pr_err("Missing tfo->fabric_make_tpg()\n");
 501                 return -EINVAL;
 502         }
 503         if (!tfo->fabric_drop_tpg) {
 504                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 505                 return -EINVAL;
 506         }
 507
 508         return 0;
 509 }
 510
 511 /*
 512  * Called 2nd from fabric module with returned parameter of
 513  * struct target_fabric_configfs * from target_fabric_configfs_init().
 514  *
 515  * Upon a successful registration, the new fabric's struct config_item is
 516  * return.  Also, a pointer to this struct is set in the passed
 517  * struct target_fabric_configfs.
 518  */
 519 int target_fabric_configfs_register(
 520         struct target_fabric_configfs *tf)
 521 {
 522         int ret;
 523
 524         if (!tf) {
 525                 pr_err("Unable to locate target_fabric_configfs"
 526                         " pointer\n");
 527                 return -EINVAL;
 528         }
 529         if (!tf->tf_subsys) {
 530                 pr_err("Unable to target struct config_subsystem"
 531                         " pointer\n");
 532                 return -EINVAL;
 533         }
 534         ret = target_fabric_tf_ops_check(tf);
 535         if (ret < 0)
 536                 return ret;
 537
 538         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 539                 ">>>>>>>>>>\n");
 540         return 0;
 541 }
 542 EXPORT_SYMBOL(target_fabric_configfs_register);
 543
 544 void target_fabric_configfs_deregister(
 545         struct target_fabric_configfs *tf)
 546 {
 547         struct configfs_subsystem *su;
 548
 549         if (!tf) {
 550                 pr_err("Unable to locate passed target_fabric_"
 551                         "configfs\n");
 552                 return;
 553         }
 554         su = tf->tf_subsys;
 555         if (!su) {
 556                 pr_err("Unable to locate passed tf->tf_subsys"
 557                         " pointer\n");
 558                 return;
 559         }
 560         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 561                         ">>>>>>>>>>>>\n");
 562         mutex_lock(&g_tf_lock);
 563         if (atomic_read(&tf->tf_access_cnt)) {
 564                 mutex_unlock(&g_tf_lock);
 565                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 566                         tf->tf_name);
 567                 BUG();
 568         }
 569         list_del(&tf->tf_list);
 570         mutex_unlock(&g_tf_lock);
 571
 572         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 573                         " %s\n", tf->tf_name);
 574         tf->tf_module = NULL;
 575         tf->tf_subsys = NULL;
 576         kfree(tf);
 577
 578         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 579                         ">>>>>\n");
 580 }
 581 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 582
 583 /*##############################################################################
 584 // Stop functions called by external Target Fabrics Modules
 585 //############################################################################*/
 586
 587 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 588
 589 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 590 static ssize_t target_core_dev_show_attr_##_name(                       \
 591         struct se_dev_attrib *da,                                       \
 592         char *page)                                                     \
 593 {                                                                       \
 594         struct se_device *dev;                                          \
 595         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 596         ssize_t rb;                                                     \
 597                                                                         \
 598         spin_lock(&se_dev->se_dev_lock);                                \
 599         dev = se_dev->se_dev_ptr;                                       \
 600         if (!dev) {                                                     \
 601                 spin_unlock(&se_dev->se_dev_lock);                      \
 602                 return -ENODEV;                                         \
 603         }                                                               \
 604         rb = snprintf(page, PAGE_SIZE, "%u\n",                          \
 605                 (u32)dev->se_sub_dev->se_dev_attrib._name);             \
 606         spin_unlock(&se_dev->se_dev_lock);                              \
 607                                                                         \
 608         return rb;                                                      \
 609 }
 610
 611 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 612 static ssize_t target_core_dev_store_attr_##_name(                      \
 613         struct se_dev_attrib *da,                                       \
 614         const char *page,                                               \
 615         size_t count)                                                   \
 616 {                                                                       \
 617         struct se_device *dev;                                          \
 618         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 619         unsigned long val;                                              \
 620         int ret;                                                        \
 621                                                                         \
 622         spin_lock(&se_dev->se_dev_lock);                                \
 623         dev = se_dev->se_dev_ptr;                                       \
 624         if (!dev) {                                                     \
 625                 spin_unlock(&se_dev->se_dev_lock);                      \
 626                 return -ENODEV;                                         \
 627         }                                                               \
 628         ret = strict_strtoul(page, 0, &val);                            \
 629         if (ret < 0) {                                                  \
 630                 spin_unlock(&se_dev->se_dev_lock);                      \
 631                 pr_err("strict_strtoul() failed with"           \
 632                         " ret: %d\n", ret);                             \
 633                 return -EINVAL;                                         \
 634         }                                                               \
 635         ret = se_dev_set_##_name(dev, (u32)val);                        \
 636         spin_unlock(&se_dev->se_dev_lock);                              \
 637                                                                         \
 638         return (!ret) ? count : -EINVAL;                                \
 639 }
 640
 641 #define DEF_DEV_ATTRIB(_name)                                           \
 642 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 643 DEF_DEV_ATTRIB_STORE(_name);
 644
 645 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 646 DEF_DEV_ATTRIB_SHOW(_name);
 647
 648 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 649 #define SE_DEV_ATTR(_name, _mode)                                       \
 650 static struct target_core_dev_attrib_attribute                          \
 651                         target_core_dev_attrib_##_name =                \
 652                 __CONFIGFS_EATTR(_name, _mode,                          \
 653                 target_core_dev_show_attr_##_name,                      \
 654                 target_core_dev_store_attr_##_name);
 655
 656 #define SE_DEV_ATTR_RO(_name);                                          \
 657 static struct target_core_dev_attrib_attribute                          \
 658                         target_core_dev_attrib_##_name =                \
 659         __CONFIGFS_EATTR_RO(_name,                                      \
 660         target_core_dev_show_attr_##_name);
 661
 662 DEF_DEV_ATTRIB(emulate_dpo);
 663 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 664
 665 DEF_DEV_ATTRIB(emulate_fua_write);
 666 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 667
 668 DEF_DEV_ATTRIB(emulate_fua_read);
 669 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 670
 671 DEF_DEV_ATTRIB(emulate_write_cache);
 672 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 673
 674 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 675 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 676
 677 DEF_DEV_ATTRIB(emulate_tas);
 678 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 679
 680 DEF_DEV_ATTRIB(emulate_tpu);
 681 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 682
 683 DEF_DEV_ATTRIB(emulate_tpws);
 684 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 685
 686 DEF_DEV_ATTRIB(enforce_pr_isids);
 687 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 688
 689 DEF_DEV_ATTRIB(is_nonrot);
 690 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 691
 692 DEF_DEV_ATTRIB(emulate_rest_reord);
 693 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 694
 695 DEF_DEV_ATTRIB_RO(hw_block_size);
 696 SE_DEV_ATTR_RO(hw_block_size);
 697
 698 DEF_DEV_ATTRIB(block_size);
 699 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 700
 701 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 702 SE_DEV_ATTR_RO(hw_max_sectors);
 703
 704 DEF_DEV_ATTRIB(max_sectors);
 705 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
 706
 707 DEF_DEV_ATTRIB(optimal_sectors);
 708 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 709
 710 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 711 SE_DEV_ATTR_RO(hw_queue_depth);
 712
 713 DEF_DEV_ATTRIB(queue_depth);
 714 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 715
 716 DEF_DEV_ATTRIB(max_unmap_lba_count);
 717 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 718
 719 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 720 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 721
 722 DEF_DEV_ATTRIB(unmap_granularity);
 723 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 724
 725 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 726 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 727
 728 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 729
 730 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 731         &target_core_dev_attrib_emulate_dpo.attr,
 732         &target_core_dev_attrib_emulate_fua_write.attr,
 733         &target_core_dev_attrib_emulate_fua_read.attr,
 734         &target_core_dev_attrib_emulate_write_cache.attr,
 735         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 736         &target_core_dev_attrib_emulate_tas.attr,
 737         &target_core_dev_attrib_emulate_tpu.attr,
 738         &target_core_dev_attrib_emulate_tpws.attr,
 739         &target_core_dev_attrib_enforce_pr_isids.attr,
 740         &target_core_dev_attrib_is_nonrot.attr,
 741         &target_core_dev_attrib_emulate_rest_reord.attr,
 742         &target_core_dev_attrib_hw_block_size.attr,
 743         &target_core_dev_attrib_block_size.attr,
 744         &target_core_dev_attrib_hw_max_sectors.attr,
 745         &target_core_dev_attrib_max_sectors.attr,
 746         &target_core_dev_attrib_optimal_sectors.attr,
 747         &target_core_dev_attrib_hw_queue_depth.attr,
 748         &target_core_dev_attrib_queue_depth.attr,
 749         &target_core_dev_attrib_max_unmap_lba_count.attr,
 750         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 751         &target_core_dev_attrib_unmap_granularity.attr,
 752         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 753         NULL,
 754 };
 755
 756 static struct configfs_item_operations target_core_dev_attrib_ops = {
 757         .show_attribute         = target_core_dev_attrib_attr_show,
 758         .store_attribute        = target_core_dev_attrib_attr_store,
 759 };
 760
 761 static struct config_item_type target_core_dev_attrib_cit = {
 762         .ct_item_ops            = &target_core_dev_attrib_ops,
 763         .ct_attrs               = target_core_dev_attrib_attrs,
 764         .ct_owner               = THIS_MODULE,
 765 };
 766
 767 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 768
 769 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 770
 771 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 772 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 773 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 774                 __CONFIGFS_EATTR(_name, _mode,                          \
 775                 target_core_dev_wwn_show_attr_##_name,                  \
 776                 target_core_dev_wwn_store_attr_##_name);
 777
 778 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 779 do {                                                                    \
 780         static struct target_core_dev_wwn_attribute                     \
 781                         target_core_dev_wwn_##_name =                   \
 782                 __CONFIGFS_EATTR_RO(_name,                              \
 783                 target_core_dev_wwn_show_attr_##_name);                 \
 784 } while (0);
 785
 786 /*
 787  * VPD page 0x80 Unit serial
 788  */
 789 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 790         struct t10_wwn *t10_wwn,
 791         char *page)
 792 {
 793         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 794         struct se_device *dev;
 795
 796         dev = se_dev->se_dev_ptr;
 797         if (!dev)
 798                 return -ENODEV;
 799
 800         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 801                 &t10_wwn->unit_serial[0]);
 802 }
 803
 804 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 805         struct t10_wwn *t10_wwn,
 806         const char *page,
 807         size_t count)
 808 {
 809         struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
 810         struct se_device *dev;
 811         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 812
 813         /*
 814          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 815          * from the struct scsi_device level firmware, do not allow
 816          * VPD Unit Serial to be emulated.
 817          *
 818          * Note this struct scsi_device could also be emulating VPD
 819          * information from its drivers/scsi LLD.  But for now we assume
 820          * it is doing 'the right thing' wrt a world wide unique
 821          * VPD Unit Serial Number that OS dependent multipath can depend on.
 822          */
 823         if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
 824                 pr_err("Underlying SCSI device firmware provided VPD"
 825                         " Unit Serial, ignoring request\n");
 826                 return -EOPNOTSUPP;
 827         }
 828
 829         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 830                 pr_err("Emulated VPD Unit Serial exceeds"
 831                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 832                 return -EOVERFLOW;
 833         }
 834         /*
 835          * Check to see if any active $FABRIC_MOD exports exist.  If they
 836          * do exist, fail here as changing this information on the fly
 837          * (underneath the initiator side OS dependent multipath code)
 838          * could cause negative effects.
 839          */
 840         dev = su_dev->se_dev_ptr;
 841         if (dev) {
 842                 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
 843                         pr_err("Unable to set VPD Unit Serial while"
 844                                 " active %d $FABRIC_MOD exports exist\n",
 845                                 atomic_read(&dev->dev_export_obj.obj_access_count));
 846                         return -EINVAL;
 847                 }
 848         }
 849         /*
 850          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 851          *
 852          * Also, strip any newline added from the userspace
 853          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 854          */
 855         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 856         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 857         snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 858                         "%s", strstrip(buf));
 859         su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
 860
 861         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 862                         " %s\n", su_dev->t10_wwn.unit_serial);
 863
 864         return count;
 865 }
 866
 867 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 868
 869 /*
 870  * VPD page 0x83 Protocol Identifier
 871  */
 872 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 873         struct t10_wwn *t10_wwn,
 874         char *page)
 875 {
 876         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 877         struct se_device *dev;
 878         struct t10_vpd *vpd;
 879         unsigned char buf[VPD_TMP_BUF_SIZE];
 880         ssize_t len = 0;
 881
 882         dev = se_dev->se_dev_ptr;
 883         if (!dev)
 884                 return -ENODEV;
 885
 886         memset(buf, 0, VPD_TMP_BUF_SIZE);
 887
 888         spin_lock(&t10_wwn->t10_vpd_lock);
 889         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 890                 if (!vpd->protocol_identifier_set)
 891                         continue;
 892
 893                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 894
 895                 if (len + strlen(buf) >= PAGE_SIZE)
 896                         break;
 897
 898                 len += sprintf(page+len, "%s", buf);
 899         }
 900         spin_unlock(&t10_wwn->t10_vpd_lock);
 901
 902         return len;
 903 }
 904
 905 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 906         struct t10_wwn *t10_wwn,
 907         const char *page,
 908         size_t count)
 909 {
 910         return -ENOSYS;
 911 }
 912
 913 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 914
 915 /*
 916  * Generic wrapper for dumping VPD identifiers by association.
 917  */
 918 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 919 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 920         struct t10_wwn *t10_wwn,                                        \
 921         char *page)                                                     \
 922 {                                                                       \
 923         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;         \
 924         struct se_device *dev;                                          \
 925         struct t10_vpd *vpd;                                                    \
 926         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 927         ssize_t len = 0;                                                \
 928                                                                         \
 929         dev = se_dev->se_dev_ptr;                                       \
 930         if (!dev)                                                       \
 931                 return -ENODEV;                                         \
 932                                                                         \
 933         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 934         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 935                 if (vpd->association != _assoc)                         \
 936                         continue;                                       \
 937                                                                         \
 938                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 939                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 940                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 941                         break;                                          \
 942                 len += sprintf(page+len, "%s", buf);                    \
 943                                                                         \
 944                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 945                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 946                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 947                         break;                                          \
 948                 len += sprintf(page+len, "%s", buf);                    \
 949                                                                         \
 950                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 951                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 952                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 953                         break;                                          \
 954                 len += sprintf(page+len, "%s", buf);                    \
 955         }                                                               \
 956         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 957                                                                         \
 958         return len;                                                     \
 959 }
 960
 961 /*
 962  * VPD page 0x83 Association: Logical Unit
 963  */
 964 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 965
 966 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 967         struct t10_wwn *t10_wwn,
 968         const char *page,
 969         size_t count)
 970 {
 971         return -ENOSYS;
 972 }
 973
 974 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 975
 976 /*
 977  * VPD page 0x83 Association: Target Port
 978  */
 979 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 980
 981 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 982         struct t10_wwn *t10_wwn,
 983         const char *page,
 984         size_t count)
 985 {
 986         return -ENOSYS;
 987 }
 988
 989 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 990
 991 /*
 992  * VPD page 0x83 Association: SCSI Target Device
 993  */
 994 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 995
 996 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 997         struct t10_wwn *t10_wwn,
 998         const char *page,
 999         size_t count)
1000 {
1001         return -ENOSYS;
1002 }
1003
1004 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1005
1006 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1007
1008 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1009         &target_core_dev_wwn_vpd_unit_serial.attr,
1010         &target_core_dev_wwn_vpd_protocol_identifier.attr,
1011         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1012         &target_core_dev_wwn_vpd_assoc_target_port.attr,
1013         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1014         NULL,
1015 };
1016
1017 static struct configfs_item_operations target_core_dev_wwn_ops = {
1018         .show_attribute         = target_core_dev_wwn_attr_show,
1019         .store_attribute        = target_core_dev_wwn_attr_store,
1020 };
1021
1022 static struct config_item_type target_core_dev_wwn_cit = {
1023         .ct_item_ops            = &target_core_dev_wwn_ops,
1024         .ct_attrs               = target_core_dev_wwn_attrs,
1025         .ct_owner               = THIS_MODULE,
1026 };
1027
1028 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1029
1030 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
1031
1032 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1033 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1034 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1035         __CONFIGFS_EATTR(_name, _mode,                                  \
1036         target_core_dev_pr_show_attr_##_name,                           \
1037         target_core_dev_pr_store_attr_##_name);
1038
1039 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1040 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1041         __CONFIGFS_EATTR_RO(_name,                                      \
1042         target_core_dev_pr_show_attr_##_name);
1043
1044 /*
1045  * res_holder
1046  */
1047 static ssize_t target_core_dev_pr_show_spc3_res(
1048         struct se_device *dev,
1049         char *page,
1050         ssize_t *len)
1051 {
1052         struct se_node_acl *se_nacl;
1053         struct t10_pr_registration *pr_reg;
1054         char i_buf[PR_REG_ISID_ID_LEN];
1055         int prf_isid;
1056
1057         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1058
1059         spin_lock(&dev->dev_reservation_lock);
1060         pr_reg = dev->dev_pr_res_holder;
1061         if (!pr_reg) {
1062                 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1063                 spin_unlock(&dev->dev_reservation_lock);
1064                 return *len;
1065         }
1066         se_nacl = pr_reg->pr_reg_nacl;
1067         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1068                                 PR_REG_ISID_ID_LEN);
1069
1070         *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1071                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1072                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1073         spin_unlock(&dev->dev_reservation_lock);
1074
1075         return *len;
1076 }
1077
1078 static ssize_t target_core_dev_pr_show_spc2_res(
1079         struct se_device *dev,
1080         char *page,
1081         ssize_t *len)
1082 {
1083         struct se_node_acl *se_nacl;
1084
1085         spin_lock(&dev->dev_reservation_lock);
1086         se_nacl = dev->dev_reserved_node_acl;
1087         if (!se_nacl) {
1088                 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1089                 spin_unlock(&dev->dev_reservation_lock);
1090                 return *len;
1091         }
1092         *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1093                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1094                 se_nacl->initiatorname);
1095         spin_unlock(&dev->dev_reservation_lock);
1096
1097         return *len;
1098 }
1099
1100 static ssize_t target_core_dev_pr_show_attr_res_holder(
1101         struct se_subsystem_dev *su_dev,
1102         char *page)
1103 {
1104         ssize_t len = 0;
1105
1106         if (!su_dev->se_dev_ptr)
1107                 return -ENODEV;
1108
1109         switch (su_dev->t10_pr.res_type) {
1110         case SPC3_PERSISTENT_RESERVATIONS:
1111                 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1112                                 page, &len);
1113                 break;
1114         case SPC2_RESERVATIONS:
1115                 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1116                                 page, &len);
1117                 break;
1118         case SPC_PASSTHROUGH:
1119                 len += sprintf(page+len, "Passthrough\n");
1120                 break;
1121         default:
1122                 len += sprintf(page+len, "Unknown\n");
1123                 break;
1124         }
1125
1126         return len;
1127 }
1128
1129 SE_DEV_PR_ATTR_RO(res_holder);
1130
1131 /*
1132  * res_pr_all_tgt_pts
1133  */
1134 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1135         struct se_subsystem_dev *su_dev,
1136         char *page)
1137 {
1138         struct se_device *dev;
1139         struct t10_pr_registration *pr_reg;
1140         ssize_t len = 0;
1141
1142         dev = su_dev->se_dev_ptr;
1143         if (!dev)
1144                 return -ENODEV;
1145
1146         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1147                 return len;
1148
1149         spin_lock(&dev->dev_reservation_lock);
1150         pr_reg = dev->dev_pr_res_holder;
1151         if (!pr_reg) {
1152                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1153                 spin_unlock(&dev->dev_reservation_lock);
1154                 return len;
1155         }
1156         /*
1157          * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1158          * Basic PERSISTENT RESERVER OUT parameter list, page 290
1159          */
1160         if (pr_reg->pr_reg_all_tg_pt)
1161                 len = sprintf(page, "SPC-3 Reservation: All Target"
1162                         " Ports registration\n");
1163         else
1164                 len = sprintf(page, "SPC-3 Reservation: Single"
1165                         " Target Port registration\n");
1166         spin_unlock(&dev->dev_reservation_lock);
1167
1168         return len;
1169 }
1170
1171 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1172
1173 /*
1174  * res_pr_generation
1175  */
1176 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1177         struct se_subsystem_dev *su_dev,
1178         char *page)
1179 {
1180         if (!su_dev->se_dev_ptr)
1181                 return -ENODEV;
1182
1183         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1184                 return 0;
1185
1186         return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1187 }
1188
1189 SE_DEV_PR_ATTR_RO(res_pr_generation);
1190
1191 /*
1192  * res_pr_holder_tg_port
1193  */
1194 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1195         struct se_subsystem_dev *su_dev,
1196         char *page)
1197 {
1198         struct se_device *dev;
1199         struct se_node_acl *se_nacl;
1200         struct se_lun *lun;
1201         struct se_portal_group *se_tpg;
1202         struct t10_pr_registration *pr_reg;
1203         struct target_core_fabric_ops *tfo;
1204         ssize_t len = 0;
1205
1206         dev = su_dev->se_dev_ptr;
1207         if (!dev)
1208                 return -ENODEV;
1209
1210         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1211                 return len;
1212
1213         spin_lock(&dev->dev_reservation_lock);
1214         pr_reg = dev->dev_pr_res_holder;
1215         if (!pr_reg) {
1216                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1217                 spin_unlock(&dev->dev_reservation_lock);
1218                 return len;
1219         }
1220         se_nacl = pr_reg->pr_reg_nacl;
1221         se_tpg = se_nacl->se_tpg;
1222         lun = pr_reg->pr_reg_tg_pt_lun;
1223         tfo = se_tpg->se_tpg_tfo;
1224
1225         len += sprintf(page+len, "SPC-3 Reservation: %s"
1226                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1227                 tfo->tpg_get_wwn(se_tpg));
1228         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1229                 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1230                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1231                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1232                 tfo->get_fabric_name(), lun->unpacked_lun);
1233         spin_unlock(&dev->dev_reservation_lock);
1234
1235         return len;
1236 }
1237
1238 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1239
1240 /*
1241  * res_pr_registered_i_pts
1242  */
1243 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1244         struct se_subsystem_dev *su_dev,
1245         char *page)
1246 {
1247         struct target_core_fabric_ops *tfo;
1248         struct t10_pr_registration *pr_reg;
1249         unsigned char buf[384];
1250         char i_buf[PR_REG_ISID_ID_LEN];
1251         ssize_t len = 0;
1252         int reg_count = 0, prf_isid;
1253
1254         if (!su_dev->se_dev_ptr)
1255                 return -ENODEV;
1256
1257         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1258                 return len;
1259
1260         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1261
1262         spin_lock(&su_dev->t10_pr.registration_lock);
1263         list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1264                         pr_reg_list) {
1265
1266                 memset(buf, 0, 384);
1267                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1268                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1269                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1270                                         PR_REG_ISID_ID_LEN);
1271                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1272                         tfo->get_fabric_name(),
1273                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1274                         &i_buf[0] : "", pr_reg->pr_res_key,
1275                         pr_reg->pr_res_generation);
1276
1277                 if (len + strlen(buf) >= PAGE_SIZE)
1278                         break;
1279
1280                 len += sprintf(page+len, "%s", buf);
1281                 reg_count++;
1282         }
1283         spin_unlock(&su_dev->t10_pr.registration_lock);
1284
1285         if (!reg_count)
1286                 len += sprintf(page+len, "None\n");
1287
1288         return len;
1289 }
1290
1291 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1292
1293 /*
1294  * res_pr_type
1295  */
1296 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1297         struct se_subsystem_dev *su_dev,
1298         char *page)
1299 {
1300         struct se_device *dev;
1301         struct t10_pr_registration *pr_reg;
1302         ssize_t len = 0;
1303
1304         dev = su_dev->se_dev_ptr;
1305         if (!dev)
1306                 return -ENODEV;
1307
1308         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1309                 return len;
1310
1311         spin_lock(&dev->dev_reservation_lock);
1312         pr_reg = dev->dev_pr_res_holder;
1313         if (!pr_reg) {
1314                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1315                 spin_unlock(&dev->dev_reservation_lock);
1316                 return len;
1317         }
1318         len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1319                 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1320         spin_unlock(&dev->dev_reservation_lock);
1321
1322         return len;
1323 }
1324
1325 SE_DEV_PR_ATTR_RO(res_pr_type);
1326
1327 /*
1328  * res_type
1329  */
1330 static ssize_t target_core_dev_pr_show_attr_res_type(
1331         struct se_subsystem_dev *su_dev,
1332         char *page)
1333 {
1334         ssize_t len = 0;
1335
1336         if (!su_dev->se_dev_ptr)
1337                 return -ENODEV;
1338
1339         switch (su_dev->t10_pr.res_type) {
1340         case SPC3_PERSISTENT_RESERVATIONS:
1341                 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1342                 break;
1343         case SPC2_RESERVATIONS:
1344                 len = sprintf(page, "SPC2_RESERVATIONS\n");
1345                 break;
1346         case SPC_PASSTHROUGH:
1347                 len = sprintf(page, "SPC_PASSTHROUGH\n");
1348                 break;
1349         default:
1350                 len = sprintf(page, "UNKNOWN\n");
1351                 break;
1352         }
1353
1354         return len;
1355 }
1356
1357 SE_DEV_PR_ATTR_RO(res_type);
1358
1359 /*
1360  * res_aptpl_active
1361  */
1362
1363 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1364         struct se_subsystem_dev *su_dev,
1365         char *page)
1366 {
1367         if (!su_dev->se_dev_ptr)
1368                 return -ENODEV;
1369
1370         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1371                 return 0;
1372
1373         return sprintf(page, "APTPL Bit Status: %s\n",
1374                 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1375 }
1376
1377 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1378
1379 /*
1380  * res_aptpl_metadata
1381  */
1382 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1383         struct se_subsystem_dev *su_dev,
1384         char *page)
1385 {
1386         if (!su_dev->se_dev_ptr)
1387                 return -ENODEV;
1388
1389         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1390                 return 0;
1391
1392         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1393 }
1394
1395 enum {
1396         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1397         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1398         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1399         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1400 };
1401
1402 static match_table_t tokens = {
1403         {Opt_initiator_fabric, "initiator_fabric=%s"},
1404         {Opt_initiator_node, "initiator_node=%s"},
1405         {Opt_initiator_sid, "initiator_sid=%s"},
1406         {Opt_sa_res_key, "sa_res_key=%s"},
1407         {Opt_res_holder, "res_holder=%d"},
1408         {Opt_res_type, "res_type=%d"},
1409         {Opt_res_scope, "res_scope=%d"},
1410         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1411         {Opt_mapped_lun, "mapped_lun=%d"},
1412         {Opt_target_fabric, "target_fabric=%s"},
1413         {Opt_target_node, "target_node=%s"},
1414         {Opt_tpgt, "tpgt=%d"},
1415         {Opt_port_rtpi, "port_rtpi=%d"},
1416         {Opt_target_lun, "target_lun=%d"},
1417         {Opt_err, NULL}
1418 };
1419
1420 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1421         struct se_subsystem_dev *su_dev,
1422         const char *page,
1423         size_t count)
1424 {
1425         struct se_device *dev;
1426         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1427         unsigned char *t_fabric = NULL, *t_port = NULL;
1428         char *orig, *ptr, *arg_p, *opts;
1429         substring_t args[MAX_OPT_ARGS];
1430         unsigned long long tmp_ll;
1431         u64 sa_res_key = 0;
1432         u32 mapped_lun = 0, target_lun = 0;
1433         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1434         u16 port_rpti = 0, tpgt = 0;
1435         u8 type = 0, scope;
1436
1437         dev = su_dev->se_dev_ptr;
1438         if (!dev)
1439                 return -ENODEV;
1440
1441         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1442                 return 0;
1443
1444         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1445                 pr_debug("Unable to process APTPL metadata while"
1446                         " active fabric exports exist\n");
1447                 return -EINVAL;
1448         }
1449
1450         opts = kstrdup(page, GFP_KERNEL);
1451         if (!opts)
1452                 return -ENOMEM;
1453
1454         orig = opts;
1455         while ((ptr = strsep(&opts, ",")) != NULL) {
1456                 if (!*ptr)
1457                         continue;
1458
1459                 token = match_token(ptr, tokens, args);
1460                 switch (token) {
1461                 case Opt_initiator_fabric:
1462                         i_fabric = match_strdup(&args[0]);
1463                         if (!i_fabric) {
1464                                 ret = -ENOMEM;
1465                                 goto out;
1466                         }
1467                         break;
1468                 case Opt_initiator_node:
1469                         i_port = match_strdup(&args[0]);
1470                         if (!i_port) {
1471                                 ret = -ENOMEM;
1472                                 goto out;
1473                         }
1474                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1475                                 pr_err("APTPL metadata initiator_node="
1476                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1477                                         PR_APTPL_MAX_IPORT_LEN);
1478                                 ret = -EINVAL;
1479                                 break;
1480                         }
1481                         break;
1482                 case Opt_initiator_sid:
1483                         isid = match_strdup(&args[0]);
1484                         if (!isid) {
1485                                 ret = -ENOMEM;
1486                                 goto out;
1487                         }
1488                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1489                                 pr_err("APTPL metadata initiator_isid"
1490                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1491                                         PR_REG_ISID_LEN);
1492                                 ret = -EINVAL;
1493                                 break;
1494                         }
1495                         break;
1496                 case Opt_sa_res_key:
1497                         arg_p = match_strdup(&args[0]);
1498                         if (!arg_p) {
1499                                 ret = -ENOMEM;
1500                                 goto out;
1501                         }
1502                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1503                         if (ret < 0) {
1504                                 pr_err("strict_strtoull() failed for"
1505                                         " sa_res_key=\n");
1506                                 goto out;
1507                         }
1508                         sa_res_key = (u64)tmp_ll;
1509                         break;
1510                 /*
1511                  * PR APTPL Metadata for Reservation
1512                  */
1513                 case Opt_res_holder:
1514                         match_int(args, &arg);
1515                         res_holder = arg;
1516                         break;
1517                 case Opt_res_type:
1518                         match_int(args, &arg);
1519                         type = (u8)arg;
1520                         break;
1521                 case Opt_res_scope:
1522                         match_int(args, &arg);
1523                         scope = (u8)arg;
1524                         break;
1525                 case Opt_res_all_tg_pt:
1526                         match_int(args, &arg);
1527                         all_tg_pt = (int)arg;
1528                         break;
1529                 case Opt_mapped_lun:
1530                         match_int(args, &arg);
1531                         mapped_lun = (u32)arg;
1532                         break;
1533                 /*
1534                  * PR APTPL Metadata for Target Port
1535                  */
1536                 case Opt_target_fabric:
1537                         t_fabric = match_strdup(&args[0]);
1538                         if (!t_fabric) {
1539                                 ret = -ENOMEM;
1540                                 goto out;
1541                         }
1542                         break;
1543                 case Opt_target_node:
1544                         t_port = match_strdup(&args[0]);
1545                         if (!t_port) {
1546                                 ret = -ENOMEM;
1547                                 goto out;
1548                         }
1549                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1550                                 pr_err("APTPL metadata target_node="
1551                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1552                                         PR_APTPL_MAX_TPORT_LEN);
1553                                 ret = -EINVAL;
1554                                 break;
1555                         }
1556                         break;
1557                 case Opt_tpgt:
1558                         match_int(args, &arg);
1559                         tpgt = (u16)arg;
1560                         break;
1561                 case Opt_port_rtpi:
1562                         match_int(args, &arg);
1563                         port_rpti = (u16)arg;
1564                         break;
1565                 case Opt_target_lun:
1566                         match_int(args, &arg);
1567                         target_lun = (u32)arg;
1568                         break;
1569                 default:
1570                         break;
1571                 }
1572         }
1573
1574         if (!i_port || !t_port || !sa_res_key) {
1575                 pr_err("Illegal parameters for APTPL registration\n");
1576                 ret = -EINVAL;
1577                 goto out;
1578         }
1579
1580         if (res_holder && !(type)) {
1581                 pr_err("Illegal PR type: 0x%02x for reservation"
1582                                 " holder\n", type);
1583                 ret = -EINVAL;
1584                 goto out;
1585         }
1586
1587         ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1588                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1589                         res_holder, all_tg_pt, type);
1590 out:
1591         kfree(i_fabric);
1592         kfree(i_port);
1593         kfree(isid);
1594         kfree(t_fabric);
1595         kfree(t_port);
1596         kfree(orig);
1597         return (ret == 0) ? count : ret;
1598 }
1599
1600 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1601
1602 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1603
1604 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1605         &target_core_dev_pr_res_holder.attr,
1606         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1607         &target_core_dev_pr_res_pr_generation.attr,
1608         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1609         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1610         &target_core_dev_pr_res_pr_type.attr,
1611         &target_core_dev_pr_res_type.attr,
1612         &target_core_dev_pr_res_aptpl_active.attr,
1613         &target_core_dev_pr_res_aptpl_metadata.attr,
1614         NULL,
1615 };
1616
1617 static struct configfs_item_operations target_core_dev_pr_ops = {
1618         .show_attribute         = target_core_dev_pr_attr_show,
1619         .store_attribute        = target_core_dev_pr_attr_store,
1620 };
1621
1622 static struct config_item_type target_core_dev_pr_cit = {
1623         .ct_item_ops            = &target_core_dev_pr_ops,
1624         .ct_attrs               = target_core_dev_pr_attrs,
1625         .ct_owner               = THIS_MODULE,
1626 };
1627
1628 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1629
1630 /*  Start functions for struct config_item_type target_core_dev_cit */
1631
1632 static ssize_t target_core_show_dev_info(void *p, char *page)
1633 {
1634         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1635         struct se_hba *hba = se_dev->se_dev_hba;
1636         struct se_subsystem_api *t = hba->transport;
1637         int bl = 0;
1638         ssize_t read_bytes = 0;
1639
1640         if (!se_dev->se_dev_ptr)
1641                 return -ENODEV;
1642
1643         transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1644         read_bytes += bl;
1645         read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1646         return read_bytes;
1647 }
1648
1649 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1650         .attr   = { .ca_owner = THIS_MODULE,
1651                     .ca_name = "info",
1652                     .ca_mode = S_IRUGO },
1653         .show   = target_core_show_dev_info,
1654         .store  = NULL,
1655 };
1656
1657 static ssize_t target_core_store_dev_control(
1658         void *p,
1659         const char *page,
1660         size_t count)
1661 {
1662         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1663         struct se_hba *hba = se_dev->se_dev_hba;
1664         struct se_subsystem_api *t = hba->transport;
1665
1666         if (!se_dev->se_dev_su_ptr) {
1667                 pr_err("Unable to locate struct se_subsystem_dev>se"
1668                                 "_dev_su_ptr\n");
1669                 return -EINVAL;
1670         }
1671
1672         return t->set_configfs_dev_params(hba, se_dev, page, count);
1673 }
1674
1675 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1676         .attr   = { .ca_owner = THIS_MODULE,
1677                     .ca_name = "control",
1678                     .ca_mode = S_IWUSR },
1679         .show   = NULL,
1680         .store  = target_core_store_dev_control,
1681 };
1682
1683 static ssize_t target_core_show_dev_alias(void *p, char *page)
1684 {
1685         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1686
1687         if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1688                 return 0;
1689
1690         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1691 }
1692
1693 static ssize_t target_core_store_dev_alias(
1694         void *p,
1695         const char *page,
1696         size_t count)
1697 {
1698         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1699         struct se_hba *hba = se_dev->se_dev_hba;
1700         ssize_t read_bytes;
1701
1702         if (count > (SE_DEV_ALIAS_LEN-1)) {
1703                 pr_err("alias count: %d exceeds"
1704                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1705                         SE_DEV_ALIAS_LEN-1);
1706                 return -EINVAL;
1707         }
1708
1709         se_dev->su_dev_flags |= SDF_USING_ALIAS;
1710         read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1711                         "%s", page);
1712
1713         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1714                 config_item_name(&hba->hba_group.cg_item),
1715                 config_item_name(&se_dev->se_dev_group.cg_item),
1716                 se_dev->se_dev_alias);
1717
1718         return read_bytes;
1719 }
1720
1721 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1722         .attr   = { .ca_owner = THIS_MODULE,
1723                     .ca_name = "alias",
1724                     .ca_mode =  S_IRUGO | S_IWUSR },
1725         .show   = target_core_show_dev_alias,
1726         .store  = target_core_store_dev_alias,
1727 };
1728
1729 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1730 {
1731         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1732
1733         if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1734                 return 0;
1735
1736         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1737 }
1738
1739 static ssize_t target_core_store_dev_udev_path(
1740         void *p,
1741         const char *page,
1742         size_t count)
1743 {
1744         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1745         struct se_hba *hba = se_dev->se_dev_hba;
1746         ssize_t read_bytes;
1747
1748         if (count > (SE_UDEV_PATH_LEN-1)) {
1749                 pr_err("udev_path count: %d exceeds"
1750                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1751                         SE_UDEV_PATH_LEN-1);
1752                 return -EINVAL;
1753         }
1754
1755         se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1756         read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1757                         "%s", page);
1758
1759         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1760                 config_item_name(&hba->hba_group.cg_item),
1761                 config_item_name(&se_dev->se_dev_group.cg_item),
1762                 se_dev->se_dev_udev_path);
1763
1764         return read_bytes;
1765 }
1766
1767 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1768         .attr   = { .ca_owner = THIS_MODULE,
1769                     .ca_name = "udev_path",
1770                     .ca_mode =  S_IRUGO | S_IWUSR },
1771         .show   = target_core_show_dev_udev_path,
1772         .store  = target_core_store_dev_udev_path,
1773 };
1774
1775 static ssize_t target_core_store_dev_enable(
1776         void *p,
1777         const char *page,
1778         size_t count)
1779 {
1780         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1781         struct se_device *dev;
1782         struct se_hba *hba = se_dev->se_dev_hba;
1783         struct se_subsystem_api *t = hba->transport;
1784         char *ptr;
1785
1786         ptr = strstr(page, "1");
1787         if (!ptr) {
1788                 pr_err("For dev_enable ops, only valid value"
1789                                 " is \"1\"\n");
1790                 return -EINVAL;
1791         }
1792         if (se_dev->se_dev_ptr) {
1793                 pr_err("se_dev->se_dev_ptr already set for storage"
1794                                 " object\n");
1795                 return -EEXIST;
1796         }
1797
1798         if (t->check_configfs_dev_params(hba, se_dev) < 0)
1799                 return -EINVAL;
1800
1801         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1802         if (IS_ERR(dev))
1803                 return PTR_ERR(dev);
1804         else if (!dev)
1805                 return -EINVAL;
1806
1807         se_dev->se_dev_ptr = dev;
1808         pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1809                 " %p\n", se_dev->se_dev_ptr);
1810
1811         return count;
1812 }
1813
1814 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1815         .attr   = { .ca_owner = THIS_MODULE,
1816                     .ca_name = "enable",
1817                     .ca_mode = S_IWUSR },
1818         .show   = NULL,
1819         .store  = target_core_store_dev_enable,
1820 };
1821
1822 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1823 {
1824         struct se_device *dev;
1825         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1826         struct config_item *lu_ci;
1827         struct t10_alua_lu_gp *lu_gp;
1828         struct t10_alua_lu_gp_member *lu_gp_mem;
1829         ssize_t len = 0;
1830
1831         dev = su_dev->se_dev_ptr;
1832         if (!dev)
1833                 return -ENODEV;
1834
1835         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1836                 return len;
1837
1838         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1839         if (!lu_gp_mem) {
1840                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1841                                 " pointer\n");
1842                 return -EINVAL;
1843         }
1844
1845         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1846         lu_gp = lu_gp_mem->lu_gp;
1847         if (lu_gp) {
1848                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1849                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1850                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1851         }
1852         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1853
1854         return len;
1855 }
1856
1857 static ssize_t target_core_store_alua_lu_gp(
1858         void *p,
1859         const char *page,
1860         size_t count)
1861 {
1862         struct se_device *dev;
1863         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1864         struct se_hba *hba = su_dev->se_dev_hba;
1865         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1866         struct t10_alua_lu_gp_member *lu_gp_mem;
1867         unsigned char buf[LU_GROUP_NAME_BUF];
1868         int move = 0;
1869
1870         dev = su_dev->se_dev_ptr;
1871         if (!dev)
1872                 return -ENODEV;
1873
1874         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1875                 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1876                         config_item_name(&hba->hba_group.cg_item),
1877                         config_item_name(&su_dev->se_dev_group.cg_item));
1878                 return -EINVAL;
1879         }
1880         if (count > LU_GROUP_NAME_BUF) {
1881                 pr_err("ALUA LU Group Alias too large!\n");
1882                 return -EINVAL;
1883         }
1884         memset(buf, 0, LU_GROUP_NAME_BUF);
1885         memcpy(buf, page, count);
1886         /*
1887          * Any ALUA logical unit alias besides "NULL" means we will be
1888          * making a new group association.
1889          */
1890         if (strcmp(strstrip(buf), "NULL")) {
1891                 /*
1892                  * core_alua_get_lu_gp_by_name() will increment reference to
1893                  * struct t10_alua_lu_gp.  This reference is released with
1894                  * core_alua_get_lu_gp_by_name below().
1895                  */
1896                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1897                 if (!lu_gp_new)
1898                         return -ENODEV;
1899         }
1900         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1901         if (!lu_gp_mem) {
1902                 if (lu_gp_new)
1903                         core_alua_put_lu_gp_from_name(lu_gp_new);
1904                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1905                                 " pointer\n");
1906                 return -EINVAL;
1907         }
1908
1909         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1910         lu_gp = lu_gp_mem->lu_gp;
1911         if (lu_gp) {
1912                 /*
1913                  * Clearing an existing lu_gp association, and replacing
1914                  * with NULL
1915                  */
1916                 if (!lu_gp_new) {
1917                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1918                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1919                                 " %hu\n",
1920                                 config_item_name(&hba->hba_group.cg_item),
1921                                 config_item_name(&su_dev->se_dev_group.cg_item),
1922                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1923                                 lu_gp->lu_gp_id);
1924
1925                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1926                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1927
1928                         return count;
1929                 }
1930                 /*
1931                  * Removing existing association of lu_gp_mem with lu_gp
1932                  */
1933                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1934                 move = 1;
1935         }
1936         /*
1937          * Associate lu_gp_mem with lu_gp_new.
1938          */
1939         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1940         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1941
1942         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1943                 " core/alua/lu_gps/%s, ID: %hu\n",
1944                 (move) ? "Moving" : "Adding",
1945                 config_item_name(&hba->hba_group.cg_item),
1946                 config_item_name(&su_dev->se_dev_group.cg_item),
1947                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1948                 lu_gp_new->lu_gp_id);
1949
1950         core_alua_put_lu_gp_from_name(lu_gp_new);
1951         return count;
1952 }
1953
1954 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1955         .attr   = { .ca_owner = THIS_MODULE,
1956                     .ca_name = "alua_lu_gp",
1957                     .ca_mode = S_IRUGO | S_IWUSR },
1958         .show   = target_core_show_alua_lu_gp,
1959         .store  = target_core_store_alua_lu_gp,
1960 };
1961
1962 static struct configfs_attribute *lio_core_dev_attrs[] = {
1963         &target_core_attr_dev_info.attr,
1964         &target_core_attr_dev_control.attr,
1965         &target_core_attr_dev_alias.attr,
1966         &target_core_attr_dev_udev_path.attr,
1967         &target_core_attr_dev_enable.attr,
1968         &target_core_attr_dev_alua_lu_gp.attr,
1969         NULL,
1970 };
1971
1972 static void target_core_dev_release(struct config_item *item)
1973 {
1974         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1975                                 struct se_subsystem_dev, se_dev_group);
1976         struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1977         struct se_subsystem_api *t = hba->transport;
1978         struct config_group *dev_cg = &se_dev->se_dev_group;
1979
1980         kfree(dev_cg->default_groups);
1981         /*
1982          * This pointer will set when the storage is enabled with:
1983          *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1984          */
1985         if (se_dev->se_dev_ptr) {
1986                 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1987                         "virtual_device() for se_dev_ptr: %p\n",
1988                         se_dev->se_dev_ptr);
1989
1990                 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1991         } else {
1992                 /*
1993                  * Release struct se_subsystem_dev->se_dev_su_ptr..
1994                  */
1995                 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1996                         "device() for se_dev_su_ptr: %p\n",
1997                         se_dev->se_dev_su_ptr);
1998
1999                 t->free_device(se_dev->se_dev_su_ptr);
2000         }
2001
2002         pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
2003                         "_dev_t: %p\n", se_dev);
2004         kfree(se_dev);
2005 }
2006
2007 static ssize_t target_core_dev_show(struct config_item *item,
2008                                      struct configfs_attribute *attr,
2009                                      char *page)
2010 {
2011         struct se_subsystem_dev *se_dev = container_of(
2012                         to_config_group(item), struct se_subsystem_dev,
2013                         se_dev_group);
2014         struct target_core_configfs_attribute *tc_attr = container_of(
2015                         attr, struct target_core_configfs_attribute, attr);
2016
2017         if (!tc_attr->show)
2018                 return -EINVAL;
2019
2020         return tc_attr->show(se_dev, page);
2021 }
2022
2023 static ssize_t target_core_dev_store(struct config_item *item,
2024                                       struct configfs_attribute *attr,
2025                                       const char *page, size_t count)
2026 {
2027         struct se_subsystem_dev *se_dev = container_of(
2028                         to_config_group(item), struct se_subsystem_dev,
2029                         se_dev_group);
2030         struct target_core_configfs_attribute *tc_attr = container_of(
2031                         attr, struct target_core_configfs_attribute, attr);
2032
2033         if (!tc_attr->store)
2034                 return -EINVAL;
2035
2036         return tc_attr->store(se_dev, page, count);
2037 }
2038
2039 static struct configfs_item_operations target_core_dev_item_ops = {
2040         .release                = target_core_dev_release,
2041         .show_attribute         = target_core_dev_show,
2042         .store_attribute        = target_core_dev_store,
2043 };
2044
2045 static struct config_item_type target_core_dev_cit = {
2046         .ct_item_ops            = &target_core_dev_item_ops,
2047         .ct_attrs               = lio_core_dev_attrs,
2048         .ct_owner               = THIS_MODULE,
2049 };
2050
2051 /* End functions for struct config_item_type target_core_dev_cit */
2052
2053 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2054
2055 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2056 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2057 static struct target_core_alua_lu_gp_attribute                          \
2058                         target_core_alua_lu_gp_##_name =                \
2059         __CONFIGFS_EATTR(_name, _mode,                                  \
2060         target_core_alua_lu_gp_show_attr_##_name,                       \
2061         target_core_alua_lu_gp_store_attr_##_name);
2062
2063 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2064 static struct target_core_alua_lu_gp_attribute                          \
2065                         target_core_alua_lu_gp_##_name =                \
2066         __CONFIGFS_EATTR_RO(_name,                                      \
2067         target_core_alua_lu_gp_show_attr_##_name);
2068
2069 /*
2070  * lu_gp_id
2071  */
2072 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2073         struct t10_alua_lu_gp *lu_gp,
2074         char *page)
2075 {
2076         if (!lu_gp->lu_gp_valid_id)
2077                 return 0;
2078
2079         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2080 }
2081
2082 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2083         struct t10_alua_lu_gp *lu_gp,
2084         const char *page,
2085         size_t count)
2086 {
2087         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2088         unsigned long lu_gp_id;
2089         int ret;
2090
2091         ret = strict_strtoul(page, 0, &lu_gp_id);
2092         if (ret < 0) {
2093                 pr_err("strict_strtoul() returned %d for"
2094                         " lu_gp_id\n", ret);
2095                 return -EINVAL;
2096         }
2097         if (lu_gp_id > 0x0000ffff) {
2098                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2099                         " 0x0000ffff\n", lu_gp_id);
2100                 return -EINVAL;
2101         }
2102
2103         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2104         if (ret < 0)
2105                 return -EINVAL;
2106
2107         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2108                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2109                 config_item_name(&alua_lu_gp_cg->cg_item),
2110                 lu_gp->lu_gp_id);
2111
2112         return count;
2113 }
2114
2115 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2116
2117 /*
2118  * members
2119  */
2120 static ssize_t target_core_alua_lu_gp_show_attr_members(
2121         struct t10_alua_lu_gp *lu_gp,
2122         char *page)
2123 {
2124         struct se_device *dev;
2125         struct se_hba *hba;
2126         struct se_subsystem_dev *su_dev;
2127         struct t10_alua_lu_gp_member *lu_gp_mem;
2128         ssize_t len = 0, cur_len;
2129         unsigned char buf[LU_GROUP_NAME_BUF];
2130
2131         memset(buf, 0, LU_GROUP_NAME_BUF);
2132
2133         spin_lock(&lu_gp->lu_gp_lock);
2134         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2135                 dev = lu_gp_mem->lu_gp_mem_dev;
2136                 su_dev = dev->se_sub_dev;
2137                 hba = su_dev->se_dev_hba;
2138
2139                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2140                         config_item_name(&hba->hba_group.cg_item),
2141                         config_item_name(&su_dev->se_dev_group.cg_item));
2142                 cur_len++; /* Extra byte for NULL terminator */
2143
2144                 if ((cur_len + len) > PAGE_SIZE) {
2145                         pr_warn("Ran out of lu_gp_show_attr"
2146                                 "_members buffer\n");
2147                         break;
2148                 }
2149                 memcpy(page+len, buf, cur_len);
2150                 len += cur_len;
2151         }
2152         spin_unlock(&lu_gp->lu_gp_lock);
2153
2154         return len;
2155 }
2156
2157 SE_DEV_ALUA_LU_ATTR_RO(members);
2158
2159 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2160
2161 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2162         &target_core_alua_lu_gp_lu_gp_id.attr,
2163         &target_core_alua_lu_gp_members.attr,
2164         NULL,
2165 };
2166
2167 static void target_core_alua_lu_gp_release(struct config_item *item)
2168 {
2169         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2170                         struct t10_alua_lu_gp, lu_gp_group);
2171
2172         core_alua_free_lu_gp(lu_gp);
2173 }
2174
2175 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2176         .release                = target_core_alua_lu_gp_release,
2177         .show_attribute         = target_core_alua_lu_gp_attr_show,
2178         .store_attribute        = target_core_alua_lu_gp_attr_store,
2179 };
2180
2181 static struct config_item_type target_core_alua_lu_gp_cit = {
2182         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2183         .ct_attrs               = target_core_alua_lu_gp_attrs,
2184         .ct_owner               = THIS_MODULE,
2185 };
2186
2187 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2188
2189 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2190
2191 static struct config_group *target_core_alua_create_lu_gp(
2192         struct config_group *group,
2193         const char *name)
2194 {
2195         struct t10_alua_lu_gp *lu_gp;
2196         struct config_group *alua_lu_gp_cg = NULL;
2197         struct config_item *alua_lu_gp_ci = NULL;
2198
2199         lu_gp = core_alua_allocate_lu_gp(name, 0);
2200         if (IS_ERR(lu_gp))
2201                 return NULL;
2202
2203         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2204         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2205
2206         config_group_init_type_name(alua_lu_gp_cg, name,
2207                         &target_core_alua_lu_gp_cit);
2208
2209         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2210                 " Group: core/alua/lu_gps/%s\n",
2211                 config_item_name(alua_lu_gp_ci));
2212
2213         return alua_lu_gp_cg;
2214
2215 }
2216
2217 static void target_core_alua_drop_lu_gp(
2218         struct config_group *group,
2219         struct config_item *item)
2220 {
2221         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2222                         struct t10_alua_lu_gp, lu_gp_group);
2223
2224         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2225                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2226                 config_item_name(item), lu_gp->lu_gp_id);
2227         /*
2228          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2229          * -> target_core_alua_lu_gp_release()
2230          */
2231         config_item_put(item);
2232 }
2233
2234 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2235         .make_group             = &target_core_alua_create_lu_gp,
2236         .drop_item              = &target_core_alua_drop_lu_gp,
2237 };
2238
2239 static struct config_item_type target_core_alua_lu_gps_cit = {
2240         .ct_item_ops            = NULL,
2241         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2242         .ct_owner               = THIS_MODULE,
2243 };
2244
2245 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2246
2247 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2248
2249 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2250 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2251 static struct target_core_alua_tg_pt_gp_attribute                       \
2252                         target_core_alua_tg_pt_gp_##_name =             \
2253         __CONFIGFS_EATTR(_name, _mode,                                  \
2254         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2255         target_core_alua_tg_pt_gp_store_attr_##_name);
2256
2257 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2258 static struct target_core_alua_tg_pt_gp_attribute                       \
2259                         target_core_alua_tg_pt_gp_##_name =             \
2260         __CONFIGFS_EATTR_RO(_name,                                      \
2261         target_core_alua_tg_pt_gp_show_attr_##_name);
2262
2263 /*
2264  * alua_access_state
2265  */
2266 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2267         struct t10_alua_tg_pt_gp *tg_pt_gp,
2268         char *page)
2269 {
2270         return sprintf(page, "%d\n",
2271                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2272 }
2273
2274 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2275         struct t10_alua_tg_pt_gp *tg_pt_gp,
2276         const char *page,
2277         size_t count)
2278 {
2279         struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2280         unsigned long tmp;
2281         int new_state, ret;
2282
2283         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2284                 pr_err("Unable to do implict ALUA on non valid"
2285                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2286                 return -EINVAL;
2287         }
2288
2289         ret = strict_strtoul(page, 0, &tmp);
2290         if (ret < 0) {
2291                 pr_err("Unable to extract new ALUA access state from"
2292                                 " %s\n", page);
2293                 return -EINVAL;
2294         }
2295         new_state = (int)tmp;
2296
2297         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2298                 pr_err("Unable to process implict configfs ALUA"
2299                         " transition while TPGS_IMPLICT_ALUA is diabled\n");
2300                 return -EINVAL;
2301         }
2302
2303         ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2304                                         NULL, NULL, new_state, 0);
2305         return (!ret) ? count : -EINVAL;
2306 }
2307
2308 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2309
2310 /*
2311  * alua_access_status
2312  */
2313 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2314         struct t10_alua_tg_pt_gp *tg_pt_gp,
2315         char *page)
2316 {
2317         return sprintf(page, "%s\n",
2318                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2319 }
2320
2321 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2322         struct t10_alua_tg_pt_gp *tg_pt_gp,
2323         const char *page,
2324         size_t count)
2325 {
2326         unsigned long tmp;
2327         int new_status, ret;
2328
2329         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2330                 pr_err("Unable to do set ALUA access status on non"
2331                         " valid tg_pt_gp ID: %hu\n",
2332                         tg_pt_gp->tg_pt_gp_valid_id);
2333                 return -EINVAL;
2334         }
2335
2336         ret = strict_strtoul(page, 0, &tmp);
2337         if (ret < 0) {
2338                 pr_err("Unable to extract new ALUA access status"
2339                                 " from %s\n", page);
2340                 return -EINVAL;
2341         }
2342         new_status = (int)tmp;
2343
2344         if ((new_status != ALUA_STATUS_NONE) &&
2345             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2346             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2347                 pr_err("Illegal ALUA access status: 0x%02x\n",
2348                                 new_status);
2349                 return -EINVAL;
2350         }
2351
2352         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2353         return count;
2354 }
2355
2356 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2357
2358 /*
2359  * alua_access_type
2360  */
2361 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2362         struct t10_alua_tg_pt_gp *tg_pt_gp,
2363         char *page)
2364 {
2365         return core_alua_show_access_type(tg_pt_gp, page);
2366 }
2367
2368 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2369         struct t10_alua_tg_pt_gp *tg_pt_gp,
2370         const char *page,
2371         size_t count)
2372 {
2373         return core_alua_store_access_type(tg_pt_gp, page, count);
2374 }
2375
2376 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2377
2378 /*
2379  * alua_write_metadata
2380  */
2381 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2382         struct t10_alua_tg_pt_gp *tg_pt_gp,
2383         char *page)
2384 {
2385         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2386 }
2387
2388 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2389         struct t10_alua_tg_pt_gp *tg_pt_gp,
2390         const char *page,
2391         size_t count)
2392 {
2393         unsigned long tmp;
2394         int ret;
2395
2396         ret = strict_strtoul(page, 0, &tmp);
2397         if (ret < 0) {
2398                 pr_err("Unable to extract alua_write_metadata\n");
2399                 return -EINVAL;
2400         }
2401
2402         if ((tmp != 0) && (tmp != 1)) {
2403                 pr_err("Illegal value for alua_write_metadata:"
2404                         " %lu\n", tmp);
2405                 return -EINVAL;
2406         }
2407         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2408
2409         return count;
2410 }
2411
2412 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2413
2414
2415
2416 /*
2417  * nonop_delay_msecs
2418  */
2419 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2420         struct t10_alua_tg_pt_gp *tg_pt_gp,
2421         char *page)
2422 {
2423         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2424
2425 }
2426
2427 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2428         struct t10_alua_tg_pt_gp *tg_pt_gp,
2429         const char *page,
2430         size_t count)
2431 {
2432         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2433 }
2434
2435 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2436
2437 /*
2438  * trans_delay_msecs
2439  */
2440 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2441         struct t10_alua_tg_pt_gp *tg_pt_gp,
2442         char *page)
2443 {
2444         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2445 }
2446
2447 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2448         struct t10_alua_tg_pt_gp *tg_pt_gp,
2449         const char *page,
2450         size_t count)
2451 {
2452         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2453 }
2454
2455 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2456
2457 /*
2458  * preferred
2459  */
2460
2461 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2462         struct t10_alua_tg_pt_gp *tg_pt_gp,
2463         char *page)
2464 {
2465         return core_alua_show_preferred_bit(tg_pt_gp, page);
2466 }
2467
2468 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2469         struct t10_alua_tg_pt_gp *tg_pt_gp,
2470         const char *page,
2471         size_t count)
2472 {
2473         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2474 }
2475
2476 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2477
2478 /*
2479  * tg_pt_gp_id
2480  */
2481 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2482         struct t10_alua_tg_pt_gp *tg_pt_gp,
2483         char *page)
2484 {
2485         if (!tg_pt_gp->tg_pt_gp_valid_id)
2486                 return 0;
2487
2488         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2489 }
2490
2491 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2492         struct t10_alua_tg_pt_gp *tg_pt_gp,
2493         const char *page,
2494         size_t count)
2495 {
2496         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2497         unsigned long tg_pt_gp_id;
2498         int ret;
2499
2500         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2501         if (ret < 0) {
2502                 pr_err("strict_strtoul() returned %d for"
2503                         " tg_pt_gp_id\n", ret);
2504                 return -EINVAL;
2505         }
2506         if (tg_pt_gp_id > 0x0000ffff) {
2507                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2508                         " 0x0000ffff\n", tg_pt_gp_id);
2509                 return -EINVAL;
2510         }
2511
2512         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2513         if (ret < 0)
2514                 return -EINVAL;
2515
2516         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2517                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2518                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2519                 tg_pt_gp->tg_pt_gp_id);
2520
2521         return count;
2522 }
2523
2524 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2525
2526 /*
2527  * members
2528  */
2529 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2530         struct t10_alua_tg_pt_gp *tg_pt_gp,
2531         char *page)
2532 {
2533         struct se_port *port;
2534         struct se_portal_group *tpg;
2535         struct se_lun *lun;
2536         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2537         ssize_t len = 0, cur_len;
2538         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2539
2540         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2541
2542         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2543         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2544                         tg_pt_gp_mem_list) {
2545                 port = tg_pt_gp_mem->tg_pt;
2546                 tpg = port->sep_tpg;
2547                 lun = port->sep_lun;
2548
2549                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2550                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2551                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2552                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2553                         config_item_name(&lun->lun_group.cg_item));
2554                 cur_len++; /* Extra byte for NULL terminator */
2555
2556                 if ((cur_len + len) > PAGE_SIZE) {
2557                         pr_warn("Ran out of lu_gp_show_attr"
2558                                 "_members buffer\n");
2559                         break;
2560                 }
2561                 memcpy(page+len, buf, cur_len);
2562                 len += cur_len;
2563         }
2564         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2565
2566         return len;
2567 }
2568
2569 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2570
2571 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2572                         tg_pt_gp_group);
2573
2574 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2575         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2576         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2577         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2578         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2579         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2580         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2581         &target_core_alua_tg_pt_gp_preferred.attr,
2582         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2583         &target_core_alua_tg_pt_gp_members.attr,
2584         NULL,
2585 };
2586
2587 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2588 {
2589         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2590                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2591
2592         core_alua_free_tg_pt_gp(tg_pt_gp);
2593 }
2594
2595 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2596         .release                = target_core_alua_tg_pt_gp_release,
2597         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2598         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2599 };
2600
2601 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2602         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2603         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2604         .ct_owner               = THIS_MODULE,
2605 };
2606
2607 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2608
2609 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2610
2611 static struct config_group *target_core_alua_create_tg_pt_gp(
2612         struct config_group *group,
2613         const char *name)
2614 {
2615         struct t10_alua *alua = container_of(group, struct t10_alua,
2616                                         alua_tg_pt_gps_group);
2617         struct t10_alua_tg_pt_gp *tg_pt_gp;
2618         struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2619         struct config_group *alua_tg_pt_gp_cg = NULL;
2620         struct config_item *alua_tg_pt_gp_ci = NULL;
2621
2622         tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2623         if (!tg_pt_gp)
2624                 return NULL;
2625
2626         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2627         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2628
2629         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2630                         &target_core_alua_tg_pt_gp_cit);
2631
2632         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2633                 " Group: alua/tg_pt_gps/%s\n",
2634                 config_item_name(alua_tg_pt_gp_ci));
2635
2636         return alua_tg_pt_gp_cg;
2637 }
2638
2639 static void target_core_alua_drop_tg_pt_gp(
2640         struct config_group *group,
2641         struct config_item *item)
2642 {
2643         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2644                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2645
2646         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2647                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2648                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2649         /*
2650          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2651          * -> target_core_alua_tg_pt_gp_release().
2652          */
2653         config_item_put(item);
2654 }
2655
2656 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2657         .make_group             = &target_core_alua_create_tg_pt_gp,
2658         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2659 };
2660
2661 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2662         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2663         .ct_owner               = THIS_MODULE,
2664 };
2665
2666 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2667
2668 /* Start functions for struct config_item_type target_core_alua_cit */
2669
2670 /*
2671  * target_core_alua_cit is a ConfigFS group that lives under
2672  * /sys/kernel/config/target/core/alua.  There are default groups
2673  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2674  * target_core_alua_cit in target_core_init_configfs() below.
2675  */
2676 static struct config_item_type target_core_alua_cit = {
2677         .ct_item_ops            = NULL,
2678         .ct_attrs               = NULL,
2679         .ct_owner               = THIS_MODULE,
2680 };
2681
2682 /* End functions for struct config_item_type target_core_alua_cit */
2683
2684 /* Start functions for struct config_item_type target_core_stat_cit */
2685
2686 static struct config_group *target_core_stat_mkdir(
2687         struct config_group *group,
2688         const char *name)
2689 {
2690         return ERR_PTR(-ENOSYS);
2691 }
2692
2693 static void target_core_stat_rmdir(
2694         struct config_group *group,
2695         struct config_item *item)
2696 {
2697         return;
2698 }
2699
2700 static struct configfs_group_operations target_core_stat_group_ops = {
2701         .make_group             = &target_core_stat_mkdir,
2702         .drop_item              = &target_core_stat_rmdir,
2703 };
2704
2705 static struct config_item_type target_core_stat_cit = {
2706         .ct_group_ops           = &target_core_stat_group_ops,
2707         .ct_owner               = THIS_MODULE,
2708 };
2709
2710 /* End functions for struct config_item_type target_core_stat_cit */
2711
2712 /* Start functions for struct config_item_type target_core_hba_cit */
2713
2714 static struct config_group *target_core_make_subdev(
2715         struct config_group *group,
2716         const char *name)
2717 {
2718         struct t10_alua_tg_pt_gp *tg_pt_gp;
2719         struct se_subsystem_dev *se_dev;
2720         struct se_subsystem_api *t;
2721         struct config_item *hba_ci = &group->cg_item;
2722         struct se_hba *hba = item_to_hba(hba_ci);
2723         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2724         struct config_group *dev_stat_grp = NULL;
2725         int errno = -ENOMEM, ret;
2726
2727         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2728         if (ret)
2729                 return ERR_PTR(ret);
2730         /*
2731          * Locate the struct se_subsystem_api from parent's struct se_hba.
2732          */
2733         t = hba->transport;
2734
2735         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2736         if (!se_dev) {
2737                 pr_err("Unable to allocate memory for"
2738                                 " struct se_subsystem_dev\n");
2739                 goto unlock;
2740         }
2741         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2742         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2743         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2744         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2745         spin_lock_init(&se_dev->t10_pr.registration_lock);
2746         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2747         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2748         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2749         spin_lock_init(&se_dev->se_dev_lock);
2750         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2751         se_dev->t10_wwn.t10_sub_dev = se_dev;
2752         se_dev->t10_alua.t10_sub_dev = se_dev;
2753         se_dev->se_dev_attrib.da_sub_dev = se_dev;
2754
2755         se_dev->se_dev_hba = hba;
2756         dev_cg = &se_dev->se_dev_group;
2757
2758         dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2759                         GFP_KERNEL);
2760         if (!dev_cg->default_groups)
2761                 goto out;
2762         /*
2763          * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2764          * for ->allocate_virtdevice()
2765          *
2766          * se_dev->se_dev_ptr will be set after ->create_virtdev()
2767          * has been called successfully in the next level up in the
2768          * configfs tree for device object's struct config_group.
2769          */
2770         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2771         if (!se_dev->se_dev_su_ptr) {
2772                 pr_err("Unable to locate subsystem dependent pointer"
2773                         " from allocate_virtdevice()\n");
2774                 goto out;
2775         }
2776
2777         config_group_init_type_name(&se_dev->se_dev_group, name,
2778                         &target_core_dev_cit);
2779         config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2780                         &target_core_dev_attrib_cit);
2781         config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2782                         &target_core_dev_pr_cit);
2783         config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2784                         &target_core_dev_wwn_cit);
2785         config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2786                         "alua", &target_core_alua_tg_pt_gps_cit);
2787         config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2788                         "statistics", &target_core_stat_cit);
2789
2790         dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2791         dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2792         dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2793         dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2794         dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2795         dev_cg->default_groups[5] = NULL;
2796         /*
2797          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2798          */
2799         tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2800         if (!tg_pt_gp)
2801                 goto out;
2802
2803         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2804         tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2805                                 GFP_KERNEL);
2806         if (!tg_pt_gp_cg->default_groups) {
2807                 pr_err("Unable to allocate tg_pt_gp_cg->"
2808                                 "default_groups\n");
2809                 goto out;
2810         }
2811
2812         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2813                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2814         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2815         tg_pt_gp_cg->default_groups[1] = NULL;
2816         se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2817         /*
2818          * Add core/$HBA/$DEV/statistics/ default groups
2819          */
2820         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2821         dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2822                                 GFP_KERNEL);
2823         if (!dev_stat_grp->default_groups) {
2824                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2825                 goto out;
2826         }
2827         target_stat_setup_dev_default_groups(se_dev);
2828
2829         pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2830                 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2831
2832         mutex_unlock(&hba->hba_access_mutex);
2833         return &se_dev->se_dev_group;
2834 out:
2835         if (se_dev->t10_alua.default_tg_pt_gp) {
2836                 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2837                 se_dev->t10_alua.default_tg_pt_gp = NULL;
2838         }
2839         if (dev_stat_grp)
2840                 kfree(dev_stat_grp->default_groups);
2841         if (tg_pt_gp_cg)
2842                 kfree(tg_pt_gp_cg->default_groups);
2843         if (dev_cg)
2844                 kfree(dev_cg->default_groups);
2845         if (se_dev->se_dev_su_ptr)
2846                 t->free_device(se_dev->se_dev_su_ptr);
2847         kfree(se_dev);
2848 unlock:
2849         mutex_unlock(&hba->hba_access_mutex);
2850         return ERR_PTR(errno);
2851 }
2852
2853 static void target_core_drop_subdev(
2854         struct config_group *group,
2855         struct config_item *item)
2856 {
2857         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2858                                 struct se_subsystem_dev, se_dev_group);
2859         struct se_hba *hba;
2860         struct se_subsystem_api *t;
2861         struct config_item *df_item;
2862         struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2863         int i;
2864
2865         hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2866
2867         mutex_lock(&hba->hba_access_mutex);
2868         t = hba->transport;
2869
2870         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2871         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2872                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2873                 dev_stat_grp->default_groups[i] = NULL;
2874                 config_item_put(df_item);
2875         }
2876         kfree(dev_stat_grp->default_groups);
2877
2878         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2879         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2880                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2881                 tg_pt_gp_cg->default_groups[i] = NULL;
2882                 config_item_put(df_item);
2883         }
2884         kfree(tg_pt_gp_cg->default_groups);
2885         /*
2886          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2887          * directly from target_core_alua_tg_pt_gp_release().
2888          */
2889         se_dev->t10_alua.default_tg_pt_gp = NULL;
2890
2891         dev_cg = &se_dev->se_dev_group;
2892         for (i = 0; dev_cg->default_groups[i]; i++) {
2893                 df_item = &dev_cg->default_groups[i]->cg_item;
2894                 dev_cg->default_groups[i] = NULL;
2895                 config_item_put(df_item);
2896         }
2897         /*
2898          * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2899          * from target_core_dev_item_ops->release() ->target_core_dev_release().
2900          */
2901         config_item_put(item);
2902         mutex_unlock(&hba->hba_access_mutex);
2903 }
2904
2905 static struct configfs_group_operations target_core_hba_group_ops = {
2906         .make_group             = target_core_make_subdev,
2907         .drop_item              = target_core_drop_subdev,
2908 };
2909
2910 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2911 #define SE_HBA_ATTR(_name, _mode)                               \
2912 static struct target_core_hba_attribute                         \
2913                 target_core_hba_##_name =                       \
2914                 __CONFIGFS_EATTR(_name, _mode,                  \
2915                 target_core_hba_show_attr_##_name,              \
2916                 target_core_hba_store_attr_##_name);
2917
2918 #define SE_HBA_ATTR_RO(_name)                                   \
2919 static struct target_core_hba_attribute                         \
2920                 target_core_hba_##_name =                       \
2921                 __CONFIGFS_EATTR_RO(_name,                      \
2922                 target_core_hba_show_attr_##_name);
2923
2924 static ssize_t target_core_hba_show_attr_hba_info(
2925         struct se_hba *hba,
2926         char *page)
2927 {
2928         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2929                         hba->hba_id, hba->transport->name,
2930                         TARGET_CORE_CONFIGFS_VERSION);
2931 }
2932
2933 SE_HBA_ATTR_RO(hba_info);
2934
2935 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2936                                 char *page)
2937 {
2938         int hba_mode = 0;
2939
2940         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2941                 hba_mode = 1;
2942
2943         return sprintf(page, "%d\n", hba_mode);
2944 }
2945
2946 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2947                                 const char *page, size_t count)
2948 {
2949         struct se_subsystem_api *transport = hba->transport;
2950         unsigned long mode_flag;
2951         int ret;
2952
2953         if (transport->pmode_enable_hba == NULL)
2954                 return -EINVAL;
2955
2956         ret = strict_strtoul(page, 0, &mode_flag);
2957         if (ret < 0) {
2958                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2959                 return -EINVAL;
2960         }
2961
2962         spin_lock(&hba->device_lock);
2963         if (!list_empty(&hba->hba_dev_list)) {
2964                 pr_err("Unable to set hba_mode with active devices\n");
2965                 spin_unlock(&hba->device_lock);
2966                 return -EINVAL;
2967         }
2968         spin_unlock(&hba->device_lock);
2969
2970         ret = transport->pmode_enable_hba(hba, mode_flag);
2971         if (ret < 0)
2972                 return -EINVAL;
2973         if (ret > 0)
2974                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2975         else if (ret == 0)
2976                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2977
2978         return count;
2979 }
2980
2981 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2982
2983 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2984
2985 static void target_core_hba_release(struct config_item *item)
2986 {
2987         struct se_hba *hba = container_of(to_config_group(item),
2988                                 struct se_hba, hba_group);
2989         core_delete_hba(hba);
2990 }
2991
2992 static struct configfs_attribute *target_core_hba_attrs[] = {
2993         &target_core_hba_hba_info.attr,
2994         &target_core_hba_hba_mode.attr,
2995         NULL,
2996 };
2997
2998 static struct configfs_item_operations target_core_hba_item_ops = {
2999         .release                = target_core_hba_release,
3000         .show_attribute         = target_core_hba_attr_show,
3001         .store_attribute        = target_core_hba_attr_store,
3002 };
3003
3004 static struct config_item_type target_core_hba_cit = {
3005         .ct_item_ops            = &target_core_hba_item_ops,
3006         .ct_group_ops           = &target_core_hba_group_ops,
3007         .ct_attrs               = target_core_hba_attrs,
3008         .ct_owner               = THIS_MODULE,
3009 };
3010
3011 static struct config_group *target_core_call_addhbatotarget(
3012         struct config_group *group,
3013         const char *name)
3014 {
3015         char *se_plugin_str, *str, *str2;
3016         struct se_hba *hba;
3017         char buf[TARGET_CORE_NAME_MAX_LEN];
3018         unsigned long plugin_dep_id = 0;
3019         int ret;
3020
3021         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3022         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3023                 pr_err("Passed *name strlen(): %d exceeds"
3024                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3025                         TARGET_CORE_NAME_MAX_LEN);
3026                 return ERR_PTR(-ENAMETOOLONG);
3027         }
3028         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3029
3030         str = strstr(buf, "_");
3031         if (!str) {
3032                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3033                 return ERR_PTR(-EINVAL);
3034         }
3035         se_plugin_str = buf;
3036         /*
3037          * Special case for subsystem plugins that have "_" in their names.
3038          * Namely rd_direct and rd_mcp..
3039          */
3040         str2 = strstr(str+1, "_");
3041         if (str2) {
3042                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3043                 str2++; /* Skip to start of plugin dependent ID */
3044                 str = str2;
3045         } else {
3046                 *str = '\0'; /* Terminate for *se_plugin_str */
3047                 str++; /* Skip to start of plugin dependent ID */
3048         }
3049
3050         ret = strict_strtoul(str, 0, &plugin_dep_id);
3051         if (ret < 0) {
3052                 pr_err("strict_strtoul() returned %d for"
3053                                 " plugin_dep_id\n", ret);
3054                 return ERR_PTR(-EINVAL);
3055         }
3056         /*
3057          * Load up TCM subsystem plugins if they have not already been loaded.
3058          */
3059         transport_subsystem_check_init();
3060
3061         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3062         if (IS_ERR(hba))
3063                 return ERR_CAST(hba);
3064
3065         config_group_init_type_name(&hba->hba_group, name,
3066                         &target_core_hba_cit);
3067
3068         return &hba->hba_group;
3069 }
3070
3071 static void target_core_call_delhbafromtarget(
3072         struct config_group *group,
3073         struct config_item *item)
3074 {
3075         /*
3076          * core_delete_hba() is called from target_core_hba_item_ops->release()
3077          * -> target_core_hba_release()
3078          */
3079         config_item_put(item);
3080 }
3081
3082 static struct configfs_group_operations target_core_group_ops = {
3083         .make_group     = target_core_call_addhbatotarget,
3084         .drop_item      = target_core_call_delhbafromtarget,
3085 };
3086
3087 static struct config_item_type target_core_cit = {
3088         .ct_item_ops    = NULL,
3089         .ct_group_ops   = &target_core_group_ops,
3090         .ct_attrs       = NULL,
3091         .ct_owner       = THIS_MODULE,
3092 };
3093
3094 /* Stop functions for struct config_item_type target_core_hba_cit */
3095
3096 static int __init target_core_init_configfs(void)
3097 {
3098         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3099         struct config_group *lu_gp_cg = NULL;
3100         struct configfs_subsystem *subsys;
3101         struct t10_alua_lu_gp *lu_gp;
3102         int ret;
3103
3104         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3105                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3106                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3107
3108         subsys = target_core_subsystem[0];
3109         config_group_init(&subsys->su_group);
3110         mutex_init(&subsys->su_mutex);
3111
3112         INIT_LIST_HEAD(&g_tf_list);
3113         mutex_init(&g_tf_lock);
3114         ret = init_se_kmem_caches();
3115         if (ret < 0)
3116                 return ret;
3117         /*
3118          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3119          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3120          */
3121         target_cg = &subsys->su_group;
3122         target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3123                                 GFP_KERNEL);
3124         if (!target_cg->default_groups) {
3125                 pr_err("Unable to allocate target_cg->default_groups\n");
3126                 goto out_global;
3127         }
3128
3129         config_group_init_type_name(&target_core_hbagroup,
3130                         "core", &target_core_cit);
3131         target_cg->default_groups[0] = &target_core_hbagroup;
3132         target_cg->default_groups[1] = NULL;
3133         /*
3134          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3135          */
3136         hba_cg = &target_core_hbagroup;
3137         hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3138                                 GFP_KERNEL);
3139         if (!hba_cg->default_groups) {
3140                 pr_err("Unable to allocate hba_cg->default_groups\n");
3141                 goto out_global;
3142         }
3143         config_group_init_type_name(&alua_group,
3144                         "alua", &target_core_alua_cit);
3145         hba_cg->default_groups[0] = &alua_group;
3146         hba_cg->default_groups[1] = NULL;
3147         /*
3148          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3149          * groups under /sys/kernel/config/target/core/alua/
3150          */
3151         alua_cg = &alua_group;
3152         alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3153                         GFP_KERNEL);
3154         if (!alua_cg->default_groups) {
3155                 pr_err("Unable to allocate alua_cg->default_groups\n");
3156                 goto out_global;
3157         }
3158
3159         config_group_init_type_name(&alua_lu_gps_group,
3160                         "lu_gps", &target_core_alua_lu_gps_cit);
3161         alua_cg->default_groups[0] = &alua_lu_gps_group;
3162         alua_cg->default_groups[1] = NULL;
3163         /*
3164          * Add core/alua/lu_gps/default_lu_gp
3165          */
3166         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3167         if (IS_ERR(lu_gp))
3168                 goto out_global;
3169
3170         lu_gp_cg = &alua_lu_gps_group;
3171         lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3172                         GFP_KERNEL);
3173         if (!lu_gp_cg->default_groups) {
3174                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3175                 goto out_global;
3176         }
3177
3178         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3179                                 &target_core_alua_lu_gp_cit);
3180         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3181         lu_gp_cg->default_groups[1] = NULL;
3182         default_lu_gp = lu_gp;
3183         /*
3184          * Register the target_core_mod subsystem with configfs.
3185          */
3186         ret = configfs_register_subsystem(subsys);
3187         if (ret < 0) {
3188                 pr_err("Error %d while registering subsystem %s\n",
3189                         ret, subsys->su_group.cg_item.ci_namebuf);
3190                 goto out_global;
3191         }
3192         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3193                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3194                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3195         /*
3196          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3197          */
3198         ret = rd_module_init();
3199         if (ret < 0)
3200                 goto out;
3201
3202         if (core_dev_setup_virtual_lun0() < 0)
3203                 goto out;
3204
3205         return 0;
3206
3207 out:
3208         configfs_unregister_subsystem(subsys);
3209         core_dev_release_virtual_lun0();
3210         rd_module_exit();
3211 out_global:
3212         if (default_lu_gp) {
3213                 core_alua_free_lu_gp(default_lu_gp);
3214                 default_lu_gp = NULL;
3215         }
3216         if (lu_gp_cg)
3217                 kfree(lu_gp_cg->default_groups);
3218         if (alua_cg)
3219                 kfree(alua_cg->default_groups);
3220         if (hba_cg)
3221                 kfree(hba_cg->default_groups);
3222         kfree(target_cg->default_groups);
3223         release_se_kmem_caches();
3224         return ret;
3225 }
3226
3227 static void __exit target_core_exit_configfs(void)
3228 {
3229         struct configfs_subsystem *subsys;
3230         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3231         struct config_item *item;
3232         int i;
3233
3234         subsys = target_core_subsystem[0];
3235
3236         lu_gp_cg = &alua_lu_gps_group;
3237         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3238                 item = &lu_gp_cg->default_groups[i]->cg_item;
3239                 lu_gp_cg->default_groups[i] = NULL;
3240                 config_item_put(item);
3241         }
3242         kfree(lu_gp_cg->default_groups);
3243         lu_gp_cg->default_groups = NULL;
3244
3245         alua_cg = &alua_group;
3246         for (i = 0; alua_cg->default_groups[i]; i++) {
3247                 item = &alua_cg->default_groups[i]->cg_item;
3248                 alua_cg->default_groups[i] = NULL;
3249                 config_item_put(item);
3250         }
3251         kfree(alua_cg->default_groups);
3252         alua_cg->default_groups = NULL;
3253
3254         hba_cg = &target_core_hbagroup;
3255         for (i = 0; hba_cg->default_groups[i]; i++) {
3256                 item = &hba_cg->default_groups[i]->cg_item;
3257                 hba_cg->default_groups[i] = NULL;
3258                 config_item_put(item);
3259         }
3260         kfree(hba_cg->default_groups);
3261         hba_cg->default_groups = NULL;
3262         /*
3263          * We expect subsys->su_group.default_groups to be released
3264          * by configfs subsystem provider logic..
3265          */
3266         configfs_unregister_subsystem(subsys);
3267         kfree(subsys->su_group.default_groups);
3268
3269         core_alua_free_lu_gp(default_lu_gp);
3270         default_lu_gp = NULL;
3271
3272         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3273                         " Infrastructure\n");
3274
3275         core_dev_release_virtual_lun0();
3276         rd_module_exit();
3277         release_se_kmem_caches();
3278 }
3279
3280 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3281 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3282 MODULE_LICENSE("GPL");
3283
3284 module_init(target_core_init_configfs);
3285 module_exit(target_core_exit_configfs);