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) 2008-2010 Rising Tide Systems
   7  * Copyright (c) 2008-2010 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 <linux/version.h>
  27 #include <generated/utsrelease.h>
  28 #include <linux/utsname.h>
  29 #include <linux/init.h>
  30 #include <linux/fs.h>
  31 #include <linux/namei.h>
  32 #include <linux/slab.h>
  33 #include <linux/types.h>
  34 #include <linux/delay.h>
  35 #include <linux/unistd.h>
  36 #include <linux/string.h>
  37 #include <linux/parser.h>
  38 #include <linux/syscalls.h>
  39 #include <linux/configfs.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
  54 static struct list_head g_tf_list;
  55 static struct mutex g_tf_lock;
  56
  57 struct target_core_configfs_attribute {
  58         struct configfs_attribute attr;
  59         ssize_t (*show)(void *, char *);
  60         ssize_t (*store)(void *, const char *, size_t);
  61 };
  62
  63 static inline struct se_hba *
  64 item_to_hba(struct config_item *item)
  65 {
  66         return container_of(to_config_group(item), struct se_hba, hba_group);
  67 }
  68
  69 /*
  70  * Attributes for /sys/kernel/config/target/
  71  */
  72 static ssize_t target_core_attr_show(struct config_item *item,
  73                                       struct configfs_attribute *attr,
  74                                       char *page)
  75 {
  76         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  77                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  78                 utsname()->sysname, utsname()->machine);
  79 }
  80
  81 static struct configfs_item_operations target_core_fabric_item_ops = {
  82         .show_attribute = target_core_attr_show,
  83 };
  84
  85 static struct configfs_attribute target_core_item_attr_version = {
  86         .ca_owner       = THIS_MODULE,
  87         .ca_name        = "version",
  88         .ca_mode        = S_IRUGO,
  89 };
  90
  91 static struct target_fabric_configfs *target_core_get_fabric(
  92         const char *name)
  93 {
  94         struct target_fabric_configfs *tf;
  95
  96         if (!(name))
  97                 return NULL;
  98
  99         mutex_lock(&g_tf_lock);
 100         list_for_each_entry(tf, &g_tf_list, tf_list) {
 101                 if (!(strcmp(tf->tf_name, name))) {
 102                         atomic_inc(&tf->tf_access_cnt);
 103                         mutex_unlock(&g_tf_lock);
 104                         return tf;
 105                 }
 106         }
 107         mutex_unlock(&g_tf_lock);
 108
 109         return NULL;
 110 }
 111
 112 /*
 113  * Called from struct target_core_group_ops->make_group()
 114  */
 115 static struct config_group *target_core_register_fabric(
 116         struct config_group *group,
 117         const char *name)
 118 {
 119         struct target_fabric_configfs *tf;
 120         int ret;
 121
 122         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
 123                         " %s\n", group, name);
 124         /*
 125          * Ensure that TCM subsystem plugins are loaded at this point for
 126          * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
 127          * LUN symlinks.
 128          */
 129         if (transport_subsystem_check_init() < 0)
 130                 return ERR_PTR(-EINVAL);
 131
 132         /*
 133          * Below are some hardcoded request_module() calls to automatically
 134          * local fabric modules when the following is called:
 135          *
 136          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 137          *
 138          * Note that this does not limit which TCM fabric module can be
 139          * registered, but simply provids auto loading logic for modules with
 140          * mkdir(2) system calls with known TCM fabric modules.
 141          */
 142         if (!(strncmp(name, "iscsi", 5))) {
 143                 /*
 144                  * Automatically load the LIO Target fabric module when the
 145                  * following is called:
 146                  *
 147                  * mkdir -p $CONFIGFS/target/iscsi
 148                  */
 149                 ret = request_module("iscsi_target_mod");
 150                 if (ret < 0) {
 151                         printk(KERN_ERR "request_module() failed for"
 152                                 " iscsi_target_mod.ko: %d\n", ret);
 153                         return ERR_PTR(-EINVAL);
 154                 }
 155         } else if (!(strncmp(name, "loopback", 8))) {
 156                 /*
 157                  * Automatically load the tcm_loop fabric module when the
 158                  * following is called:
 159                  *
 160                  * mkdir -p $CONFIGFS/target/loopback
 161                  */
 162                 ret = request_module("tcm_loop");
 163                 if (ret < 0) {
 164                         printk(KERN_ERR "request_module() failed for"
 165                                 " tcm_loop.ko: %d\n", ret);
 166                         return ERR_PTR(-EINVAL);
 167                 }
 168         }
 169
 170         tf = target_core_get_fabric(name);
 171         if (!(tf)) {
 172                 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
 173                         name);
 174                 return ERR_PTR(-EINVAL);
 175         }
 176         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
 177                         " %s\n", tf->tf_name);
 178         /*
 179          * On a successful target_core_get_fabric() look, the returned
 180          * struct target_fabric_configfs *tf will contain a usage reference.
 181          */
 182         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 183                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 184
 185         tf->tf_group.default_groups = tf->tf_default_groups;
 186         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 187         tf->tf_group.default_groups[1] = NULL;
 188
 189         config_group_init_type_name(&tf->tf_group, name,
 190                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 191         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 192                         &TF_CIT_TMPL(tf)->tfc_discovery_cit);
 193
 194         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 195                         " %s\n", tf->tf_group.cg_item.ci_name);
 196         /*
 197          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 198          */
 199         tf->tf_ops.tf_subsys = tf->tf_subsys;
 200         tf->tf_fabric = &tf->tf_group.cg_item;
 201         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 202                         " for %s\n", name);
 203
 204         return &tf->tf_group;
 205 }
 206
 207 /*
 208  * Called from struct target_core_group_ops->drop_item()
 209  */
 210 static void target_core_deregister_fabric(
 211         struct config_group *group,
 212         struct config_item *item)
 213 {
 214         struct target_fabric_configfs *tf = container_of(
 215                 to_config_group(item), struct target_fabric_configfs, tf_group);
 216         struct config_group *tf_group;
 217         struct config_item *df_item;
 218         int i;
 219
 220         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 221                 " tf list\n", config_item_name(item));
 222
 223         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 224                         " %s\n", tf->tf_name);
 225         atomic_dec(&tf->tf_access_cnt);
 226
 227         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
 228                         " tf->tf_fabric for %s\n", tf->tf_name);
 229         tf->tf_fabric = NULL;
 230
 231         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 232                         " %s\n", config_item_name(item));
 233
 234         tf_group = &tf->tf_group;
 235         for (i = 0; tf_group->default_groups[i]; i++) {
 236                 df_item = &tf_group->default_groups[i]->cg_item;
 237                 tf_group->default_groups[i] = NULL;
 238                 config_item_put(df_item);
 239         }
 240         config_item_put(item);
 241 }
 242
 243 static struct configfs_group_operations target_core_fabric_group_ops = {
 244         .make_group     = &target_core_register_fabric,
 245         .drop_item      = &target_core_deregister_fabric,
 246 };
 247
 248 /*
 249  * All item attributes appearing in /sys/kernel/target/ appear here.
 250  */
 251 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 252         &target_core_item_attr_version,
 253         NULL,
 254 };
 255
 256 /*
 257  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 258  */
 259 static struct config_item_type target_core_fabrics_item = {
 260         .ct_item_ops    = &target_core_fabric_item_ops,
 261         .ct_group_ops   = &target_core_fabric_group_ops,
 262         .ct_attrs       = target_core_fabric_item_attrs,
 263         .ct_owner       = THIS_MODULE,
 264 };
 265
 266 static struct configfs_subsystem target_core_fabrics = {
 267         .su_group = {
 268                 .cg_item = {
 269                         .ci_namebuf = "target",
 270                         .ci_type = &target_core_fabrics_item,
 271                 },
 272         },
 273 };
 274
 275 static struct configfs_subsystem *target_core_subsystem[] = {
 276         &target_core_fabrics,
 277         NULL,
 278 };
 279
 280 /*##############################################################################
 281 // Start functions called by external Target Fabrics Modules
 282 //############################################################################*/
 283
 284 /*
 285  * First function called by fabric modules to:
 286  *
 287  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 288  * 2) Add struct target_fabric_configfs to g_tf_list
 289  * 3) Return struct target_fabric_configfs to fabric module to be passed
 290  *    into target_fabric_configfs_register().
 291  */
 292 struct target_fabric_configfs *target_fabric_configfs_init(
 293         struct module *fabric_mod,
 294         const char *name)
 295 {
 296         struct target_fabric_configfs *tf;
 297
 298         if (!(fabric_mod)) {
 299                 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
 300                 return NULL;
 301         }
 302         if (!(name)) {
 303                 printk(KERN_ERR "Unable to locate passed fabric name\n");
 304                 return NULL;
 305         }
 306         if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
 307                 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
 308                         "_NAME_SIZE\n", name);
 309                 return NULL;
 310         }
 311
 312         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 313         if (!(tf))
 314                 return ERR_PTR(-ENOMEM);
 315
 316         INIT_LIST_HEAD(&tf->tf_list);
 317         atomic_set(&tf->tf_access_cnt, 0);
 318         /*
 319          * Setup the default generic struct config_item_type's (cits) in
 320          * struct target_fabric_configfs->tf_cit_tmpl
 321          */
 322         tf->tf_module = fabric_mod;
 323         target_fabric_setup_cits(tf);
 324
 325         tf->tf_subsys = target_core_subsystem[0];
 326         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 327
 328         mutex_lock(&g_tf_lock);
 329         list_add_tail(&tf->tf_list, &g_tf_list);
 330         mutex_unlock(&g_tf_lock);
 331
 332         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 333                         ">>>>>>>>>>>>>>\n");
 334         printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
 335                         " %s\n", tf, tf->tf_name);
 336         return tf;
 337 }
 338 EXPORT_SYMBOL(target_fabric_configfs_init);
 339
 340 /*
 341  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 342  */
 343 void target_fabric_configfs_free(
 344         struct target_fabric_configfs *tf)
 345 {
 346         mutex_lock(&g_tf_lock);
 347         list_del(&tf->tf_list);
 348         mutex_unlock(&g_tf_lock);
 349
 350         kfree(tf);
 351 }
 352 EXPORT_SYMBOL(target_fabric_configfs_free);
 353
 354 /*
 355  * Perform a sanity check of the passed tf->tf_ops before completing
 356  * TCM fabric module registration.
 357  */
 358 static int target_fabric_tf_ops_check(
 359         struct target_fabric_configfs *tf)
 360 {
 361         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 362
 363         if (!(tfo->get_fabric_name)) {
 364                 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
 365                 return -EINVAL;
 366         }
 367         if (!(tfo->get_fabric_proto_ident)) {
 368                 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
 369                 return -EINVAL;
 370         }
 371         if (!(tfo->tpg_get_wwn)) {
 372                 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
 373                 return -EINVAL;
 374         }
 375         if (!(tfo->tpg_get_tag)) {
 376                 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
 377                 return -EINVAL;
 378         }
 379         if (!(tfo->tpg_get_default_depth)) {
 380                 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
 381                 return -EINVAL;
 382         }
 383         if (!(tfo->tpg_get_pr_transport_id)) {
 384                 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
 385                 return -EINVAL;
 386         }
 387         if (!(tfo->tpg_get_pr_transport_id_len)) {
 388                 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
 389                 return -EINVAL;
 390         }
 391         if (!(tfo->tpg_check_demo_mode)) {
 392                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
 393                 return -EINVAL;
 394         }
 395         if (!(tfo->tpg_check_demo_mode_cache)) {
 396                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
 397                 return -EINVAL;
 398         }
 399         if (!(tfo->tpg_check_demo_mode_write_protect)) {
 400                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
 401                 return -EINVAL;
 402         }
 403         if (!(tfo->tpg_check_prod_mode_write_protect)) {
 404                 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
 405                 return -EINVAL;
 406         }
 407         if (!(tfo->tpg_alloc_fabric_acl)) {
 408                 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
 409                 return -EINVAL;
 410         }
 411         if (!(tfo->tpg_release_fabric_acl)) {
 412                 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
 413                 return -EINVAL;
 414         }
 415         if (!(tfo->tpg_get_inst_index)) {
 416                 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
 417                 return -EINVAL;
 418         }
 419         if (!(tfo->release_cmd_to_pool)) {
 420                 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
 421                 return -EINVAL;
 422         }
 423         if (!(tfo->release_cmd_direct)) {
 424                 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
 425                 return -EINVAL;
 426         }
 427         if (!(tfo->shutdown_session)) {
 428                 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
 429                 return -EINVAL;
 430         }
 431         if (!(tfo->close_session)) {
 432                 printk(KERN_ERR "Missing tfo->close_session()\n");
 433                 return -EINVAL;
 434         }
 435         if (!(tfo->stop_session)) {
 436                 printk(KERN_ERR "Missing tfo->stop_session()\n");
 437                 return -EINVAL;
 438         }
 439         if (!(tfo->fall_back_to_erl0)) {
 440                 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
 441                 return -EINVAL;
 442         }
 443         if (!(tfo->sess_logged_in)) {
 444                 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
 445                 return -EINVAL;
 446         }
 447         if (!(tfo->sess_get_index)) {
 448                 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
 449                 return -EINVAL;
 450         }
 451         if (!(tfo->write_pending)) {
 452                 printk(KERN_ERR "Missing tfo->write_pending()\n");
 453                 return -EINVAL;
 454         }
 455         if (!(tfo->write_pending_status)) {
 456                 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
 457                 return -EINVAL;
 458         }
 459         if (!(tfo->set_default_node_attributes)) {
 460                 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
 461                 return -EINVAL;
 462         }
 463         if (!(tfo->get_task_tag)) {
 464                 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
 465                 return -EINVAL;
 466         }
 467         if (!(tfo->get_cmd_state)) {
 468                 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
 469                 return -EINVAL;
 470         }
 471         if (!(tfo->new_cmd_failure)) {
 472                 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
 473                 return -EINVAL;
 474         }
 475         if (!(tfo->queue_data_in)) {
 476                 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
 477                 return -EINVAL;
 478         }
 479         if (!(tfo->queue_status)) {
 480                 printk(KERN_ERR "Missing tfo->queue_status()\n");
 481                 return -EINVAL;
 482         }
 483         if (!(tfo->queue_tm_rsp)) {
 484                 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
 485                 return -EINVAL;
 486         }
 487         if (!(tfo->set_fabric_sense_len)) {
 488                 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
 489                 return -EINVAL;
 490         }
 491         if (!(tfo->get_fabric_sense_len)) {
 492                 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
 493                 return -EINVAL;
 494         }
 495         if (!(tfo->is_state_remove)) {
 496                 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
 497                 return -EINVAL;
 498         }
 499         if (!(tfo->pack_lun)) {
 500                 printk(KERN_ERR "Missing tfo->pack_lun()\n");
 501                 return -EINVAL;
 502         }
 503         /*
 504          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 505          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 506          * target_core_fabric_configfs.c WWN+TPG group context code.
 507          */
 508         if (!(tfo->fabric_make_wwn)) {
 509                 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
 510                 return -EINVAL;
 511         }
 512         if (!(tfo->fabric_drop_wwn)) {
 513                 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
 514                 return -EINVAL;
 515         }
 516         if (!(tfo->fabric_make_tpg)) {
 517                 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
 518                 return -EINVAL;
 519         }
 520         if (!(tfo->fabric_drop_tpg)) {
 521                 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
 522                 return -EINVAL;
 523         }
 524
 525         return 0;
 526 }
 527
 528 /*
 529  * Called 2nd from fabric module with returned parameter of
 530  * struct target_fabric_configfs * from target_fabric_configfs_init().
 531  *
 532  * Upon a successful registration, the new fabric's struct config_item is
 533  * return.  Also, a pointer to this struct is set in the passed
 534  * struct target_fabric_configfs.
 535  */
 536 int target_fabric_configfs_register(
 537         struct target_fabric_configfs *tf)
 538 {
 539         struct config_group *su_group;
 540         int ret;
 541
 542         if (!(tf)) {
 543                 printk(KERN_ERR "Unable to locate target_fabric_configfs"
 544                         " pointer\n");
 545                 return -EINVAL;
 546         }
 547         if (!(tf->tf_subsys)) {
 548                 printk(KERN_ERR "Unable to target struct config_subsystem"
 549                         " pointer\n");
 550                 return -EINVAL;
 551         }
 552         su_group = &tf->tf_subsys->su_group;
 553         if (!(su_group)) {
 554                 printk(KERN_ERR "Unable to locate target struct config_group"
 555                         " pointer\n");
 556                 return -EINVAL;
 557         }
 558         ret = target_fabric_tf_ops_check(tf);
 559         if (ret < 0)
 560                 return ret;
 561
 562         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 563                 ">>>>>>>>>>\n");
 564         return 0;
 565 }
 566 EXPORT_SYMBOL(target_fabric_configfs_register);
 567
 568 void target_fabric_configfs_deregister(
 569         struct target_fabric_configfs *tf)
 570 {
 571         struct config_group *su_group;
 572         struct configfs_subsystem *su;
 573
 574         if (!(tf)) {
 575                 printk(KERN_ERR "Unable to locate passed target_fabric_"
 576                         "configfs\n");
 577                 return;
 578         }
 579         su = tf->tf_subsys;
 580         if (!(su)) {
 581                 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
 582                         " pointer\n");
 583                 return;
 584         }
 585         su_group = &tf->tf_subsys->su_group;
 586         if (!(su_group)) {
 587                 printk(KERN_ERR "Unable to locate target struct config_group"
 588                         " pointer\n");
 589                 return;
 590         }
 591
 592         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 593                         ">>>>>>>>>>>>\n");
 594         mutex_lock(&g_tf_lock);
 595         if (atomic_read(&tf->tf_access_cnt)) {
 596                 mutex_unlock(&g_tf_lock);
 597                 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
 598                         tf->tf_name);
 599                 BUG();
 600         }
 601         list_del(&tf->tf_list);
 602         mutex_unlock(&g_tf_lock);
 603
 604         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 605                         " %s\n", tf->tf_name);
 606         tf->tf_module = NULL;
 607         tf->tf_subsys = NULL;
 608         kfree(tf);
 609
 610         printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 611                         ">>>>>\n");
 612         return;
 613 }
 614 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 615
 616 /*##############################################################################
 617 // Stop functions called by external Target Fabrics Modules
 618 //############################################################################*/
 619
 620 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 621
 622 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 623 static ssize_t target_core_dev_show_attr_##_name(                       \
 624         struct se_dev_attrib *da,                                       \
 625         char *page)                                                     \
 626 {                                                                       \
 627         struct se_device *dev;                                          \
 628         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 629         ssize_t rb;                                                     \
 630                                                                         \
 631         spin_lock(&se_dev->se_dev_lock);                                \
 632         dev = se_dev->se_dev_ptr;                                       \
 633         if (!(dev)) {                                                   \
 634                 spin_unlock(&se_dev->se_dev_lock);                      \
 635                 return -ENODEV;                                         \
 636         }                                                               \
 637         rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
 638         spin_unlock(&se_dev->se_dev_lock);                              \
 639                                                                         \
 640         return rb;                                                      \
 641 }
 642
 643 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 644 static ssize_t target_core_dev_store_attr_##_name(                      \
 645         struct se_dev_attrib *da,                                       \
 646         const char *page,                                               \
 647         size_t count)                                                   \
 648 {                                                                       \
 649         struct se_device *dev;                                          \
 650         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 651         unsigned long val;                                              \
 652         int ret;                                                        \
 653                                                                         \
 654         spin_lock(&se_dev->se_dev_lock);                                \
 655         dev = se_dev->se_dev_ptr;                                       \
 656         if (!(dev)) {                                                   \
 657                 spin_unlock(&se_dev->se_dev_lock);                      \
 658                 return -ENODEV;                                         \
 659         }                                                               \
 660         ret = strict_strtoul(page, 0, &val);                            \
 661         if (ret < 0) {                                                  \
 662                 spin_unlock(&se_dev->se_dev_lock);                      \
 663                 printk(KERN_ERR "strict_strtoul() failed with"          \
 664                         " ret: %d\n", ret);                             \
 665                 return -EINVAL;                                         \
 666         }                                                               \
 667         ret = se_dev_set_##_name(dev, (u32)val);                        \
 668         spin_unlock(&se_dev->se_dev_lock);                              \
 669                                                                         \
 670         return (!ret) ? count : -EINVAL;                                \
 671 }
 672
 673 #define DEF_DEV_ATTRIB(_name)                                           \
 674 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 675 DEF_DEV_ATTRIB_STORE(_name);
 676
 677 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 678 DEF_DEV_ATTRIB_SHOW(_name);
 679
 680 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 681 #define SE_DEV_ATTR(_name, _mode)                                       \
 682 static struct target_core_dev_attrib_attribute                          \
 683                         target_core_dev_attrib_##_name =                \
 684                 __CONFIGFS_EATTR(_name, _mode,                          \
 685                 target_core_dev_show_attr_##_name,                      \
 686                 target_core_dev_store_attr_##_name);
 687
 688 #define SE_DEV_ATTR_RO(_name);                                          \
 689 static struct target_core_dev_attrib_attribute                          \
 690                         target_core_dev_attrib_##_name =                \
 691         __CONFIGFS_EATTR_RO(_name,                                      \
 692         target_core_dev_show_attr_##_name);
 693
 694 DEF_DEV_ATTRIB(emulate_dpo);
 695 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 696
 697 DEF_DEV_ATTRIB(emulate_fua_write);
 698 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 699
 700 DEF_DEV_ATTRIB(emulate_fua_read);
 701 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 702
 703 DEF_DEV_ATTRIB(emulate_write_cache);
 704 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 705
 706 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 707 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 708
 709 DEF_DEV_ATTRIB(emulate_tas);
 710 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 711
 712 DEF_DEV_ATTRIB(emulate_tpu);
 713 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 714
 715 DEF_DEV_ATTRIB(emulate_tpws);
 716 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 717
 718 DEF_DEV_ATTRIB(enforce_pr_isids);
 719 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 720
 721 DEF_DEV_ATTRIB_RO(hw_block_size);
 722 SE_DEV_ATTR_RO(hw_block_size);
 723
 724 DEF_DEV_ATTRIB(block_size);
 725 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 726
 727 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 728 SE_DEV_ATTR_RO(hw_max_sectors);
 729
 730 DEF_DEV_ATTRIB(max_sectors);
 731 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
 732
 733 DEF_DEV_ATTRIB(optimal_sectors);
 734 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 735
 736 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 737 SE_DEV_ATTR_RO(hw_queue_depth);
 738
 739 DEF_DEV_ATTRIB(queue_depth);
 740 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 741
 742 DEF_DEV_ATTRIB(task_timeout);
 743 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
 744
 745 DEF_DEV_ATTRIB(max_unmap_lba_count);
 746 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 747
 748 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 749 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 750
 751 DEF_DEV_ATTRIB(unmap_granularity);
 752 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 753
 754 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 755 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 756
 757 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 758
 759 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 760         &target_core_dev_attrib_emulate_dpo.attr,
 761         &target_core_dev_attrib_emulate_fua_write.attr,
 762         &target_core_dev_attrib_emulate_fua_read.attr,
 763         &target_core_dev_attrib_emulate_write_cache.attr,
 764         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 765         &target_core_dev_attrib_emulate_tas.attr,
 766         &target_core_dev_attrib_emulate_tpu.attr,
 767         &target_core_dev_attrib_emulate_tpws.attr,
 768         &target_core_dev_attrib_enforce_pr_isids.attr,
 769         &target_core_dev_attrib_hw_block_size.attr,
 770         &target_core_dev_attrib_block_size.attr,
 771         &target_core_dev_attrib_hw_max_sectors.attr,
 772         &target_core_dev_attrib_max_sectors.attr,
 773         &target_core_dev_attrib_optimal_sectors.attr,
 774         &target_core_dev_attrib_hw_queue_depth.attr,
 775         &target_core_dev_attrib_queue_depth.attr,
 776         &target_core_dev_attrib_task_timeout.attr,
 777         &target_core_dev_attrib_max_unmap_lba_count.attr,
 778         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 779         &target_core_dev_attrib_unmap_granularity.attr,
 780         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 781         NULL,
 782 };
 783
 784 static struct configfs_item_operations target_core_dev_attrib_ops = {
 785         .show_attribute         = target_core_dev_attrib_attr_show,
 786         .store_attribute        = target_core_dev_attrib_attr_store,
 787 };
 788
 789 static struct config_item_type target_core_dev_attrib_cit = {
 790         .ct_item_ops            = &target_core_dev_attrib_ops,
 791         .ct_attrs               = target_core_dev_attrib_attrs,
 792         .ct_owner               = THIS_MODULE,
 793 };
 794
 795 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 796
 797 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 798
 799 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 800 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 801 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 802                 __CONFIGFS_EATTR(_name, _mode,                          \
 803                 target_core_dev_wwn_show_attr_##_name,                  \
 804                 target_core_dev_wwn_store_attr_##_name);
 805
 806 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 807 do {                                                                    \
 808         static struct target_core_dev_wwn_attribute                     \
 809                         target_core_dev_wwn_##_name =                   \
 810                 __CONFIGFS_EATTR_RO(_name,                              \
 811                 target_core_dev_wwn_show_attr_##_name);                 \
 812 } while (0);
 813
 814 /*
 815  * VPD page 0x80 Unit serial
 816  */
 817 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 818         struct t10_wwn *t10_wwn,
 819         char *page)
 820 {
 821         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 822         struct se_device *dev;
 823
 824         dev = se_dev->se_dev_ptr;
 825         if (!(dev))
 826                 return -ENODEV;
 827
 828         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 829                 &t10_wwn->unit_serial[0]);
 830 }
 831
 832 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 833         struct t10_wwn *t10_wwn,
 834         const char *page,
 835         size_t count)
 836 {
 837         struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
 838         struct se_device *dev;
 839         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 840
 841         /*
 842          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 843          * from the struct scsi_device level firmware, do not allow
 844          * VPD Unit Serial to be emulated.
 845          *
 846          * Note this struct scsi_device could also be emulating VPD
 847          * information from its drivers/scsi LLD.  But for now we assume
 848          * it is doing 'the right thing' wrt a world wide unique
 849          * VPD Unit Serial Number that OS dependent multipath can depend on.
 850          */
 851         if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
 852                 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
 853                         " Unit Serial, ignoring request\n");
 854                 return -EOPNOTSUPP;
 855         }
 856
 857         if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
 858                 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
 859                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 860                 return -EOVERFLOW;
 861         }
 862         /*
 863          * Check to see if any active $FABRIC_MOD exports exist.  If they
 864          * do exist, fail here as changing this information on the fly
 865          * (underneath the initiator side OS dependent multipath code)
 866          * could cause negative effects.
 867          */
 868         dev = su_dev->se_dev_ptr;
 869         if ((dev)) {
 870                 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
 871                         printk(KERN_ERR "Unable to set VPD Unit Serial while"
 872                                 " active %d $FABRIC_MOD exports exist\n",
 873                                 atomic_read(&dev->dev_export_obj.obj_access_count));
 874                         return -EINVAL;
 875                 }
 876         }
 877         /*
 878          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 879          *
 880          * Also, strip any newline added from the userspace
 881          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 882          */
 883         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 884         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 885         snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 886                         "%s", strstrip(buf));
 887         su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
 888
 889         printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 890                         " %s\n", su_dev->t10_wwn.unit_serial);
 891
 892         return count;
 893 }
 894
 895 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 896
 897 /*
 898  * VPD page 0x83 Protocol Identifier
 899  */
 900 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 901         struct t10_wwn *t10_wwn,
 902         char *page)
 903 {
 904         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 905         struct se_device *dev;
 906         struct t10_vpd *vpd;
 907         unsigned char buf[VPD_TMP_BUF_SIZE];
 908         ssize_t len = 0;
 909
 910         dev = se_dev->se_dev_ptr;
 911         if (!(dev))
 912                 return -ENODEV;
 913
 914         memset(buf, 0, VPD_TMP_BUF_SIZE);
 915
 916         spin_lock(&t10_wwn->t10_vpd_lock);
 917         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 918                 if (!(vpd->protocol_identifier_set))
 919                         continue;
 920
 921                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 922
 923                 if ((len + strlen(buf) > PAGE_SIZE))
 924                         break;
 925
 926                 len += sprintf(page+len, "%s", buf);
 927         }
 928         spin_unlock(&t10_wwn->t10_vpd_lock);
 929
 930         return len;
 931 }
 932
 933 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 934         struct t10_wwn *t10_wwn,
 935         const char *page,
 936         size_t count)
 937 {
 938         return -ENOSYS;
 939 }
 940
 941 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 942
 943 /*
 944  * Generic wrapper for dumping VPD identifiers by association.
 945  */
 946 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 947 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 948         struct t10_wwn *t10_wwn,                                        \
 949         char *page)                                                     \
 950 {                                                                       \
 951         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;         \
 952         struct se_device *dev;                                          \
 953         struct t10_vpd *vpd;                                                    \
 954         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 955         ssize_t len = 0;                                                \
 956                                                                         \
 957         dev = se_dev->se_dev_ptr;                                       \
 958         if (!(dev))                                                     \
 959                 return -ENODEV;                                         \
 960                                                                         \
 961         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 962         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 963                 if (vpd->association != _assoc)                         \
 964                         continue;                                       \
 965                                                                         \
 966                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 967                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 968                 if ((len + strlen(buf) > PAGE_SIZE))                    \
 969                         break;                                          \
 970                 len += sprintf(page+len, "%s", buf);                    \
 971                                                                         \
 972                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 973                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 974                 if ((len + strlen(buf) > PAGE_SIZE))                    \
 975                         break;                                          \
 976                 len += sprintf(page+len, "%s", buf);                    \
 977                                                                         \
 978                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 979                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 980                 if ((len + strlen(buf) > PAGE_SIZE))                    \
 981                         break;                                          \
 982                 len += sprintf(page+len, "%s", buf);                    \
 983         }                                                               \
 984         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 985                                                                         \
 986         return len;                                                     \
 987 }
 988
 989 /*
 990  * VPD page 0x83 Assoication: Logical Unit
 991  */
 992 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 993
 994 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 995         struct t10_wwn *t10_wwn,
 996         const char *page,
 997         size_t count)
 998 {
 999         return -ENOSYS;
1000 }
1001
1002 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1003
1004 /*
1005  * VPD page 0x83 Association: Target Port
1006  */
1007 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1008
1009 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1010         struct t10_wwn *t10_wwn,
1011         const char *page,
1012         size_t count)
1013 {
1014         return -ENOSYS;
1015 }
1016
1017 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1018
1019 /*
1020  * VPD page 0x83 Association: SCSI Target Device
1021  */
1022 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1023
1024 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1025         struct t10_wwn *t10_wwn,
1026         const char *page,
1027         size_t count)
1028 {
1029         return -ENOSYS;
1030 }
1031
1032 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1033
1034 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1035
1036 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1037         &target_core_dev_wwn_vpd_unit_serial.attr,
1038         &target_core_dev_wwn_vpd_protocol_identifier.attr,
1039         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1040         &target_core_dev_wwn_vpd_assoc_target_port.attr,
1041         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1042         NULL,
1043 };
1044
1045 static struct configfs_item_operations target_core_dev_wwn_ops = {
1046         .show_attribute         = target_core_dev_wwn_attr_show,
1047         .store_attribute        = target_core_dev_wwn_attr_store,
1048 };
1049
1050 static struct config_item_type target_core_dev_wwn_cit = {
1051         .ct_item_ops            = &target_core_dev_wwn_ops,
1052         .ct_attrs               = target_core_dev_wwn_attrs,
1053         .ct_owner               = THIS_MODULE,
1054 };
1055
1056 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1057
1058 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
1059
1060 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1061 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1062 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1063         __CONFIGFS_EATTR(_name, _mode,                                  \
1064         target_core_dev_pr_show_attr_##_name,                           \
1065         target_core_dev_pr_store_attr_##_name);
1066
1067 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1068 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1069         __CONFIGFS_EATTR_RO(_name,                                      \
1070         target_core_dev_pr_show_attr_##_name);
1071
1072 /*
1073  * res_holder
1074  */
1075 static ssize_t target_core_dev_pr_show_spc3_res(
1076         struct se_device *dev,
1077         char *page,
1078         ssize_t *len)
1079 {
1080         struct se_node_acl *se_nacl;
1081         struct t10_pr_registration *pr_reg;
1082         char i_buf[PR_REG_ISID_ID_LEN];
1083         int prf_isid;
1084
1085         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1086
1087         spin_lock(&dev->dev_reservation_lock);
1088         pr_reg = dev->dev_pr_res_holder;
1089         if (!(pr_reg)) {
1090                 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1091                 spin_unlock(&dev->dev_reservation_lock);
1092                 return *len;
1093         }
1094         se_nacl = pr_reg->pr_reg_nacl;
1095         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1096                                 PR_REG_ISID_ID_LEN);
1097
1098         *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1099                 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1100                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1101         spin_unlock(&dev->dev_reservation_lock);
1102
1103         return *len;
1104 }
1105
1106 static ssize_t target_core_dev_pr_show_spc2_res(
1107         struct se_device *dev,
1108         char *page,
1109         ssize_t *len)
1110 {
1111         struct se_node_acl *se_nacl;
1112
1113         spin_lock(&dev->dev_reservation_lock);
1114         se_nacl = dev->dev_reserved_node_acl;
1115         if (!(se_nacl)) {
1116                 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1117                 spin_unlock(&dev->dev_reservation_lock);
1118                 return *len;
1119         }
1120         *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1121                 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1122                 se_nacl->initiatorname);
1123         spin_unlock(&dev->dev_reservation_lock);
1124
1125         return *len;
1126 }
1127
1128 static ssize_t target_core_dev_pr_show_attr_res_holder(
1129         struct se_subsystem_dev *su_dev,
1130         char *page)
1131 {
1132         ssize_t len = 0;
1133
1134         if (!(su_dev->se_dev_ptr))
1135                 return -ENODEV;
1136
1137         switch (T10_RES(su_dev)->res_type) {
1138         case SPC3_PERSISTENT_RESERVATIONS:
1139                 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1140                                 page, &len);
1141                 break;
1142         case SPC2_RESERVATIONS:
1143                 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1144                                 page, &len);
1145                 break;
1146         case SPC_PASSTHROUGH:
1147                 len += sprintf(page+len, "Passthrough\n");
1148                 break;
1149         default:
1150                 len += sprintf(page+len, "Unknown\n");
1151                 break;
1152         }
1153
1154         return len;
1155 }
1156
1157 SE_DEV_PR_ATTR_RO(res_holder);
1158
1159 /*
1160  * res_pr_all_tgt_pts
1161  */
1162 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1163         struct se_subsystem_dev *su_dev,
1164         char *page)
1165 {
1166         struct se_device *dev;
1167         struct t10_pr_registration *pr_reg;
1168         ssize_t len = 0;
1169
1170         dev = su_dev->se_dev_ptr;
1171         if (!(dev))
1172                 return -ENODEV;
1173
1174         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1175                 return len;
1176
1177         spin_lock(&dev->dev_reservation_lock);
1178         pr_reg = dev->dev_pr_res_holder;
1179         if (!(pr_reg)) {
1180                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1181                 spin_unlock(&dev->dev_reservation_lock);
1182                 return len;
1183         }
1184         /*
1185          * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1186          * Basic PERSISTENT RESERVER OUT parameter list, page 290
1187          */
1188         if (pr_reg->pr_reg_all_tg_pt)
1189                 len = sprintf(page, "SPC-3 Reservation: All Target"
1190                         " Ports registration\n");
1191         else
1192                 len = sprintf(page, "SPC-3 Reservation: Single"
1193                         " Target Port registration\n");
1194         spin_unlock(&dev->dev_reservation_lock);
1195
1196         return len;
1197 }
1198
1199 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1200
1201 /*
1202  * res_pr_generation
1203  */
1204 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1205         struct se_subsystem_dev *su_dev,
1206         char *page)
1207 {
1208         if (!(su_dev->se_dev_ptr))
1209                 return -ENODEV;
1210
1211         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1212                 return 0;
1213
1214         return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
1215 }
1216
1217 SE_DEV_PR_ATTR_RO(res_pr_generation);
1218
1219 /*
1220  * res_pr_holder_tg_port
1221  */
1222 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1223         struct se_subsystem_dev *su_dev,
1224         char *page)
1225 {
1226         struct se_device *dev;
1227         struct se_node_acl *se_nacl;
1228         struct se_lun *lun;
1229         struct se_portal_group *se_tpg;
1230         struct t10_pr_registration *pr_reg;
1231         struct target_core_fabric_ops *tfo;
1232         ssize_t len = 0;
1233
1234         dev = su_dev->se_dev_ptr;
1235         if (!(dev))
1236                 return -ENODEV;
1237
1238         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1239                 return len;
1240
1241         spin_lock(&dev->dev_reservation_lock);
1242         pr_reg = dev->dev_pr_res_holder;
1243         if (!(pr_reg)) {
1244                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1245                 spin_unlock(&dev->dev_reservation_lock);
1246                 return len;
1247         }
1248         se_nacl = pr_reg->pr_reg_nacl;
1249         se_tpg = se_nacl->se_tpg;
1250         lun = pr_reg->pr_reg_tg_pt_lun;
1251         tfo = TPG_TFO(se_tpg);
1252
1253         len += sprintf(page+len, "SPC-3 Reservation: %s"
1254                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1255                 tfo->tpg_get_wwn(se_tpg));
1256         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1257                 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1258                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1259                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1260                 tfo->get_fabric_name(), lun->unpacked_lun);
1261         spin_unlock(&dev->dev_reservation_lock);
1262
1263         return len;
1264 }
1265
1266 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1267
1268 /*
1269  * res_pr_registered_i_pts
1270  */
1271 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1272         struct se_subsystem_dev *su_dev,
1273         char *page)
1274 {
1275         struct target_core_fabric_ops *tfo;
1276         struct t10_pr_registration *pr_reg;
1277         unsigned char buf[384];
1278         char i_buf[PR_REG_ISID_ID_LEN];
1279         ssize_t len = 0;
1280         int reg_count = 0, prf_isid;
1281
1282         if (!(su_dev->se_dev_ptr))
1283                 return -ENODEV;
1284
1285         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1286                 return len;
1287
1288         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1289
1290         spin_lock(&T10_RES(su_dev)->registration_lock);
1291         list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
1292                         pr_reg_list) {
1293
1294                 memset(buf, 0, 384);
1295                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1296                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1297                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1298                                         PR_REG_ISID_ID_LEN);
1299                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1300                         tfo->get_fabric_name(),
1301                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1302                         &i_buf[0] : "", pr_reg->pr_res_key,
1303                         pr_reg->pr_res_generation);
1304
1305                 if ((len + strlen(buf) > PAGE_SIZE))
1306                         break;
1307
1308                 len += sprintf(page+len, "%s", buf);
1309                 reg_count++;
1310         }
1311         spin_unlock(&T10_RES(su_dev)->registration_lock);
1312
1313         if (!(reg_count))
1314                 len += sprintf(page+len, "None\n");
1315
1316         return len;
1317 }
1318
1319 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1320
1321 /*
1322  * res_pr_type
1323  */
1324 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1325         struct se_subsystem_dev *su_dev,
1326         char *page)
1327 {
1328         struct se_device *dev;
1329         struct t10_pr_registration *pr_reg;
1330         ssize_t len = 0;
1331
1332         dev = su_dev->se_dev_ptr;
1333         if (!(dev))
1334                 return -ENODEV;
1335
1336         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1337                 return len;
1338
1339         spin_lock(&dev->dev_reservation_lock);
1340         pr_reg = dev->dev_pr_res_holder;
1341         if (!(pr_reg)) {
1342                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1343                 spin_unlock(&dev->dev_reservation_lock);
1344                 return len;
1345         }
1346         len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1347                 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1348         spin_unlock(&dev->dev_reservation_lock);
1349
1350         return len;
1351 }
1352
1353 SE_DEV_PR_ATTR_RO(res_pr_type);
1354
1355 /*
1356  * res_type
1357  */
1358 static ssize_t target_core_dev_pr_show_attr_res_type(
1359         struct se_subsystem_dev *su_dev,
1360         char *page)
1361 {
1362         ssize_t len = 0;
1363
1364         if (!(su_dev->se_dev_ptr))
1365                 return -ENODEV;
1366
1367         switch (T10_RES(su_dev)->res_type) {
1368         case SPC3_PERSISTENT_RESERVATIONS:
1369                 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1370                 break;
1371         case SPC2_RESERVATIONS:
1372                 len = sprintf(page, "SPC2_RESERVATIONS\n");
1373                 break;
1374         case SPC_PASSTHROUGH:
1375                 len = sprintf(page, "SPC_PASSTHROUGH\n");
1376                 break;
1377         default:
1378                 len = sprintf(page, "UNKNOWN\n");
1379                 break;
1380         }
1381
1382         return len;
1383 }
1384
1385 SE_DEV_PR_ATTR_RO(res_type);
1386
1387 /*
1388  * res_aptpl_active
1389  */
1390
1391 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1392         struct se_subsystem_dev *su_dev,
1393         char *page)
1394 {
1395         if (!(su_dev->se_dev_ptr))
1396                 return -ENODEV;
1397
1398         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1399                 return 0;
1400
1401         return sprintf(page, "APTPL Bit Status: %s\n",
1402                 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
1403 }
1404
1405 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1406
1407 /*
1408  * res_aptpl_metadata
1409  */
1410 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1411         struct se_subsystem_dev *su_dev,
1412         char *page)
1413 {
1414         if (!(su_dev->se_dev_ptr))
1415                 return -ENODEV;
1416
1417         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1418                 return 0;
1419
1420         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1421 }
1422
1423 enum {
1424         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1425         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1426         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1427         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1428 };
1429
1430 static match_table_t tokens = {
1431         {Opt_initiator_fabric, "initiator_fabric=%s"},
1432         {Opt_initiator_node, "initiator_node=%s"},
1433         {Opt_initiator_sid, "initiator_sid=%s"},
1434         {Opt_sa_res_key, "sa_res_key=%s"},
1435         {Opt_res_holder, "res_holder=%d"},
1436         {Opt_res_type, "res_type=%d"},
1437         {Opt_res_scope, "res_scope=%d"},
1438         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1439         {Opt_mapped_lun, "mapped_lun=%d"},
1440         {Opt_target_fabric, "target_fabric=%s"},
1441         {Opt_target_node, "target_node=%s"},
1442         {Opt_tpgt, "tpgt=%d"},
1443         {Opt_port_rtpi, "port_rtpi=%d"},
1444         {Opt_target_lun, "target_lun=%d"},
1445         {Opt_err, NULL}
1446 };
1447
1448 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1449         struct se_subsystem_dev *su_dev,
1450         const char *page,
1451         size_t count)
1452 {
1453         struct se_device *dev;
1454         unsigned char *i_fabric, *t_fabric, *i_port = NULL, *t_port = NULL;
1455         unsigned char *isid = NULL;
1456         char *orig, *ptr, *arg_p, *opts;
1457         substring_t args[MAX_OPT_ARGS];
1458         unsigned long long tmp_ll;
1459         u64 sa_res_key = 0;
1460         u32 mapped_lun = 0, target_lun = 0;
1461         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1462         u16 port_rpti = 0, tpgt = 0;
1463         u8 type = 0, scope;
1464
1465         dev = su_dev->se_dev_ptr;
1466         if (!(dev))
1467                 return -ENODEV;
1468
1469         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1470                 return 0;
1471
1472         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1473                 printk(KERN_INFO "Unable to process APTPL metadata while"
1474                         " active fabric exports exist\n");
1475                 return -EINVAL;
1476         }
1477
1478         opts = kstrdup(page, GFP_KERNEL);
1479         if (!opts)
1480                 return -ENOMEM;
1481
1482         orig = opts;
1483         while ((ptr = strsep(&opts, ",")) != NULL) {
1484                 if (!*ptr)
1485                         continue;
1486
1487                 token = match_token(ptr, tokens, args);
1488                 switch (token) {
1489                 case Opt_initiator_fabric:
1490                         i_fabric = match_strdup(&args[0]);
1491                         break;
1492                 case Opt_initiator_node:
1493                         i_port = match_strdup(&args[0]);
1494                         if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) {
1495                                 printk(KERN_ERR "APTPL metadata initiator_node="
1496                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1497                                         PR_APTPL_MAX_IPORT_LEN);
1498                                 ret = -EINVAL;
1499                                 break;
1500                         }
1501                         break;
1502                 case Opt_initiator_sid:
1503                         isid = match_strdup(&args[0]);
1504                         if (strlen(isid) > PR_REG_ISID_LEN) {
1505                                 printk(KERN_ERR "APTPL metadata initiator_isid"
1506                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1507                                         PR_REG_ISID_LEN);
1508                                 ret = -EINVAL;
1509                                 break;
1510                         }
1511                         break;
1512                 case Opt_sa_res_key:
1513                         arg_p = match_strdup(&args[0]);
1514                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1515                         if (ret < 0) {
1516                                 printk(KERN_ERR "strict_strtoull() failed for"
1517                                         " sa_res_key=\n");
1518                                 goto out;
1519                         }
1520                         sa_res_key = (u64)tmp_ll;
1521                         break;
1522                 /*
1523                  * PR APTPL Metadata for Reservation
1524                  */
1525                 case Opt_res_holder:
1526                         match_int(args, &arg);
1527                         res_holder = arg;
1528                         break;
1529                 case Opt_res_type:
1530                         match_int(args, &arg);
1531                         type = (u8)arg;
1532                         break;
1533                 case Opt_res_scope:
1534                         match_int(args, &arg);
1535                         scope = (u8)arg;
1536                         break;
1537                 case Opt_res_all_tg_pt:
1538                         match_int(args, &arg);
1539                         all_tg_pt = (int)arg;
1540                         break;
1541                 case Opt_mapped_lun:
1542                         match_int(args, &arg);
1543                         mapped_lun = (u32)arg;
1544                         break;
1545                 /*
1546                  * PR APTPL Metadata for Target Port
1547                  */
1548                 case Opt_target_fabric:
1549                         t_fabric = match_strdup(&args[0]);
1550                         break;
1551                 case Opt_target_node:
1552                         t_port = match_strdup(&args[0]);
1553                         if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) {
1554                                 printk(KERN_ERR "APTPL metadata target_node="
1555                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1556                                         PR_APTPL_MAX_TPORT_LEN);
1557                                 ret = -EINVAL;
1558                                 break;
1559                         }
1560                         break;
1561                 case Opt_tpgt:
1562                         match_int(args, &arg);
1563                         tpgt = (u16)arg;
1564                         break;
1565                 case Opt_port_rtpi:
1566                         match_int(args, &arg);
1567                         port_rpti = (u16)arg;
1568                         break;
1569                 case Opt_target_lun:
1570                         match_int(args, &arg);
1571                         target_lun = (u32)arg;
1572                         break;
1573                 default:
1574                         break;
1575                 }
1576         }
1577
1578         if (!(i_port) || !(t_port) || !(sa_res_key)) {
1579                 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1580                 ret = -EINVAL;
1581                 goto out;
1582         }
1583
1584         if (res_holder && !(type)) {
1585                 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1586                                 " holder\n", type);
1587                 ret = -EINVAL;
1588                 goto out;
1589         }
1590
1591         ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
1592                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1593                         res_holder, all_tg_pt, type);
1594 out:
1595         kfree(orig);
1596         return (ret == 0) ? count : ret;
1597 }
1598
1599 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1600
1601 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1602
1603 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1604         &target_core_dev_pr_res_holder.attr,
1605         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1606         &target_core_dev_pr_res_pr_generation.attr,
1607         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1608         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1609         &target_core_dev_pr_res_pr_type.attr,
1610         &target_core_dev_pr_res_type.attr,
1611         &target_core_dev_pr_res_aptpl_active.attr,
1612         &target_core_dev_pr_res_aptpl_metadata.attr,
1613         NULL,
1614 };
1615
1616 static struct configfs_item_operations target_core_dev_pr_ops = {
1617         .show_attribute         = target_core_dev_pr_attr_show,
1618         .store_attribute        = target_core_dev_pr_attr_store,
1619 };
1620
1621 static struct config_item_type target_core_dev_pr_cit = {
1622         .ct_item_ops            = &target_core_dev_pr_ops,
1623         .ct_attrs               = target_core_dev_pr_attrs,
1624         .ct_owner               = THIS_MODULE,
1625 };
1626
1627 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1628
1629 /*  Start functions for struct config_item_type target_core_dev_cit */
1630
1631 static ssize_t target_core_show_dev_info(void *p, char *page)
1632 {
1633         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1634         struct se_hba *hba = se_dev->se_dev_hba;
1635         struct se_subsystem_api *t = hba->transport;
1636         int bl = 0;
1637         ssize_t read_bytes = 0;
1638
1639         if (!(se_dev->se_dev_ptr))
1640                 return -ENODEV;
1641
1642         transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1643         read_bytes += bl;
1644         read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1645         return read_bytes;
1646 }
1647
1648 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1649         .attr   = { .ca_owner = THIS_MODULE,
1650                     .ca_name = "info",
1651                     .ca_mode = S_IRUGO },
1652         .show   = target_core_show_dev_info,
1653         .store  = NULL,
1654 };
1655
1656 static ssize_t target_core_store_dev_control(
1657         void *p,
1658         const char *page,
1659         size_t count)
1660 {
1661         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1662         struct se_hba *hba = se_dev->se_dev_hba;
1663         struct se_subsystem_api *t = hba->transport;
1664
1665         if (!(se_dev->se_dev_su_ptr)) {
1666                 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1667                                 "_dev_su_ptr\n");
1668                 return -EINVAL;
1669         }
1670
1671         return t->set_configfs_dev_params(hba, se_dev, page, count);
1672 }
1673
1674 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1675         .attr   = { .ca_owner = THIS_MODULE,
1676                     .ca_name = "control",
1677                     .ca_mode = S_IWUSR },
1678         .show   = NULL,
1679         .store  = target_core_store_dev_control,
1680 };
1681
1682 static ssize_t target_core_show_dev_alias(void *p, char *page)
1683 {
1684         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1685
1686         if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1687                 return 0;
1688
1689         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1690 }
1691
1692 static ssize_t target_core_store_dev_alias(
1693         void *p,
1694         const char *page,
1695         size_t count)
1696 {
1697         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1698         struct se_hba *hba = se_dev->se_dev_hba;
1699         ssize_t read_bytes;
1700
1701         if (count > (SE_DEV_ALIAS_LEN-1)) {
1702                 printk(KERN_ERR "alias count: %d exceeds"
1703                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1704                         SE_DEV_ALIAS_LEN-1);
1705                 return -EINVAL;
1706         }
1707
1708         se_dev->su_dev_flags |= SDF_USING_ALIAS;
1709         read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1710                         "%s", page);
1711
1712         printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1713                 config_item_name(&hba->hba_group.cg_item),
1714                 config_item_name(&se_dev->se_dev_group.cg_item),
1715                 se_dev->se_dev_alias);
1716
1717         return read_bytes;
1718 }
1719
1720 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1721         .attr   = { .ca_owner = THIS_MODULE,
1722                     .ca_name = "alias",
1723                     .ca_mode =  S_IRUGO | S_IWUSR },
1724         .show   = target_core_show_dev_alias,
1725         .store  = target_core_store_dev_alias,
1726 };
1727
1728 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1729 {
1730         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1731
1732         if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1733                 return 0;
1734
1735         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1736 }
1737
1738 static ssize_t target_core_store_dev_udev_path(
1739         void *p,
1740         const char *page,
1741         size_t count)
1742 {
1743         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1744         struct se_hba *hba = se_dev->se_dev_hba;
1745         ssize_t read_bytes;
1746
1747         if (count > (SE_UDEV_PATH_LEN-1)) {
1748                 printk(KERN_ERR "udev_path count: %d exceeds"
1749                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1750                         SE_UDEV_PATH_LEN-1);
1751                 return -EINVAL;
1752         }
1753
1754         se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1755         read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1756                         "%s", page);
1757
1758         printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1759                 config_item_name(&hba->hba_group.cg_item),
1760                 config_item_name(&se_dev->se_dev_group.cg_item),
1761                 se_dev->se_dev_udev_path);
1762
1763         return read_bytes;
1764 }
1765
1766 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1767         .attr   = { .ca_owner = THIS_MODULE,
1768                     .ca_name = "udev_path",
1769                     .ca_mode =  S_IRUGO | S_IWUSR },
1770         .show   = target_core_show_dev_udev_path,
1771         .store  = target_core_store_dev_udev_path,
1772 };
1773
1774 static ssize_t target_core_store_dev_enable(
1775         void *p,
1776         const char *page,
1777         size_t count)
1778 {
1779         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1780         struct se_device *dev;
1781         struct se_hba *hba = se_dev->se_dev_hba;
1782         struct se_subsystem_api *t = hba->transport;
1783         char *ptr;
1784
1785         ptr = strstr(page, "1");
1786         if (!(ptr)) {
1787                 printk(KERN_ERR "For dev_enable ops, only valid value"
1788                                 " is \"1\"\n");
1789                 return -EINVAL;
1790         }
1791         if ((se_dev->se_dev_ptr)) {
1792                 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1793                                 " object\n");
1794                 return -EEXIST;
1795         }
1796
1797         if (t->check_configfs_dev_params(hba, se_dev) < 0)
1798                 return -EINVAL;
1799
1800         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1801         if (!(dev) || IS_ERR(dev))
1802                 return -EINVAL;
1803
1804         se_dev->se_dev_ptr = dev;
1805         printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1806                 " %p\n", se_dev->se_dev_ptr);
1807
1808         return count;
1809 }
1810
1811 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1812         .attr   = { .ca_owner = THIS_MODULE,
1813                     .ca_name = "enable",
1814                     .ca_mode = S_IWUSR },
1815         .show   = NULL,
1816         .store  = target_core_store_dev_enable,
1817 };
1818
1819 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1820 {
1821         struct se_device *dev;
1822         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1823         struct config_item *lu_ci;
1824         struct t10_alua_lu_gp *lu_gp;
1825         struct t10_alua_lu_gp_member *lu_gp_mem;
1826         ssize_t len = 0;
1827
1828         dev = su_dev->se_dev_ptr;
1829         if (!(dev))
1830                 return -ENODEV;
1831
1832         if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
1833                 return len;
1834
1835         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1836         if (!(lu_gp_mem)) {
1837                 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1838                                 " pointer\n");
1839                 return -EINVAL;
1840         }
1841
1842         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1843         lu_gp = lu_gp_mem->lu_gp;
1844         if ((lu_gp)) {
1845                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1846                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1847                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1848         }
1849         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1850
1851         return len;
1852 }
1853
1854 static ssize_t target_core_store_alua_lu_gp(
1855         void *p,
1856         const char *page,
1857         size_t count)
1858 {
1859         struct se_device *dev;
1860         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1861         struct se_hba *hba = su_dev->se_dev_hba;
1862         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1863         struct t10_alua_lu_gp_member *lu_gp_mem;
1864         unsigned char buf[LU_GROUP_NAME_BUF];
1865         int move = 0;
1866
1867         dev = su_dev->se_dev_ptr;
1868         if (!(dev))
1869                 return -ENODEV;
1870
1871         if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
1872                 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1873                         config_item_name(&hba->hba_group.cg_item),
1874                         config_item_name(&su_dev->se_dev_group.cg_item));
1875                 return -EINVAL;
1876         }
1877         if (count > LU_GROUP_NAME_BUF) {
1878                 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1879                 return -EINVAL;
1880         }
1881         memset(buf, 0, LU_GROUP_NAME_BUF);
1882         memcpy(buf, page, count);
1883         /*
1884          * Any ALUA logical unit alias besides "NULL" means we will be
1885          * making a new group association.
1886          */
1887         if (strcmp(strstrip(buf), "NULL")) {
1888                 /*
1889                  * core_alua_get_lu_gp_by_name() will increment reference to
1890                  * struct t10_alua_lu_gp.  This reference is released with
1891                  * core_alua_get_lu_gp_by_name below().
1892                  */
1893                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1894                 if (!(lu_gp_new))
1895                         return -ENODEV;
1896         }
1897         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1898         if (!(lu_gp_mem)) {
1899                 if (lu_gp_new)
1900                         core_alua_put_lu_gp_from_name(lu_gp_new);
1901                 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1902                                 " pointer\n");
1903                 return -EINVAL;
1904         }
1905
1906         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1907         lu_gp = lu_gp_mem->lu_gp;
1908         if ((lu_gp)) {
1909                 /*
1910                  * Clearing an existing lu_gp association, and replacing
1911                  * with NULL
1912                  */
1913                 if (!(lu_gp_new)) {
1914                         printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1915                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1916                                 " %hu\n",
1917                                 config_item_name(&hba->hba_group.cg_item),
1918                                 config_item_name(&su_dev->se_dev_group.cg_item),
1919                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1920                                 lu_gp->lu_gp_id);
1921
1922                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1923                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1924
1925                         return count;
1926                 }
1927                 /*
1928                  * Removing existing association of lu_gp_mem with lu_gp
1929                  */
1930                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1931                 move = 1;
1932         }
1933         /*
1934          * Associate lu_gp_mem with lu_gp_new.
1935          */
1936         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1937         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1938
1939         printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1940                 " core/alua/lu_gps/%s, ID: %hu\n",
1941                 (move) ? "Moving" : "Adding",
1942                 config_item_name(&hba->hba_group.cg_item),
1943                 config_item_name(&su_dev->se_dev_group.cg_item),
1944                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1945                 lu_gp_new->lu_gp_id);
1946
1947         core_alua_put_lu_gp_from_name(lu_gp_new);
1948         return count;
1949 }
1950
1951 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1952         .attr   = { .ca_owner = THIS_MODULE,
1953                     .ca_name = "alua_lu_gp",
1954                     .ca_mode = S_IRUGO | S_IWUSR },
1955         .show   = target_core_show_alua_lu_gp,
1956         .store  = target_core_store_alua_lu_gp,
1957 };
1958
1959 static struct configfs_attribute *lio_core_dev_attrs[] = {
1960         &target_core_attr_dev_info.attr,
1961         &target_core_attr_dev_control.attr,
1962         &target_core_attr_dev_alias.attr,
1963         &target_core_attr_dev_udev_path.attr,
1964         &target_core_attr_dev_enable.attr,
1965         &target_core_attr_dev_alua_lu_gp.attr,
1966         NULL,
1967 };
1968
1969 static void target_core_dev_release(struct config_item *item)
1970 {
1971         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1972                                 struct se_subsystem_dev, se_dev_group);
1973         struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1974         struct se_subsystem_api *t = hba->transport;
1975         struct config_group *dev_cg = &se_dev->se_dev_group;
1976
1977         kfree(dev_cg->default_groups);
1978         /*
1979          * This pointer will set when the storage is enabled with:
1980          *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1981          */
1982         if (se_dev->se_dev_ptr) {
1983                 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
1984                         "virtual_device() for se_dev_ptr: %p\n",
1985                         se_dev->se_dev_ptr);
1986
1987                 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1988         } else {
1989                 /*
1990                  * Release struct se_subsystem_dev->se_dev_su_ptr..
1991                  */
1992                 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
1993                         "device() for se_dev_su_ptr: %p\n",
1994                         se_dev->se_dev_su_ptr);
1995
1996                 t->free_device(se_dev->se_dev_su_ptr);
1997         }
1998
1999         printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2000                         "_dev_t: %p\n", se_dev);
2001         kfree(se_dev);
2002 }
2003
2004 static ssize_t target_core_dev_show(struct config_item *item,
2005                                      struct configfs_attribute *attr,
2006                                      char *page)
2007 {
2008         struct se_subsystem_dev *se_dev = container_of(
2009                         to_config_group(item), struct se_subsystem_dev,
2010                         se_dev_group);
2011         struct target_core_configfs_attribute *tc_attr = container_of(
2012                         attr, struct target_core_configfs_attribute, attr);
2013
2014         if (!(tc_attr->show))
2015                 return -EINVAL;
2016
2017         return tc_attr->show((void *)se_dev, page);
2018 }
2019
2020 static ssize_t target_core_dev_store(struct config_item *item,
2021                                       struct configfs_attribute *attr,
2022                                       const char *page, size_t count)
2023 {
2024         struct se_subsystem_dev *se_dev = container_of(
2025                         to_config_group(item), struct se_subsystem_dev,
2026                         se_dev_group);
2027         struct target_core_configfs_attribute *tc_attr = container_of(
2028                         attr, struct target_core_configfs_attribute, attr);
2029
2030         if (!(tc_attr->store))
2031                 return -EINVAL;
2032
2033         return tc_attr->store((void *)se_dev, page, count);
2034 }
2035
2036 static struct configfs_item_operations target_core_dev_item_ops = {
2037         .release                = target_core_dev_release,
2038         .show_attribute         = target_core_dev_show,
2039         .store_attribute        = target_core_dev_store,
2040 };
2041
2042 static struct config_item_type target_core_dev_cit = {
2043         .ct_item_ops            = &target_core_dev_item_ops,
2044         .ct_attrs               = lio_core_dev_attrs,
2045         .ct_owner               = THIS_MODULE,
2046 };
2047
2048 /* End functions for struct config_item_type target_core_dev_cit */
2049
2050 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2051
2052 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2053 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2054 static struct target_core_alua_lu_gp_attribute                          \
2055                         target_core_alua_lu_gp_##_name =                \
2056         __CONFIGFS_EATTR(_name, _mode,                                  \
2057         target_core_alua_lu_gp_show_attr_##_name,                       \
2058         target_core_alua_lu_gp_store_attr_##_name);
2059
2060 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2061 static struct target_core_alua_lu_gp_attribute                          \
2062                         target_core_alua_lu_gp_##_name =                \
2063         __CONFIGFS_EATTR_RO(_name,                                      \
2064         target_core_alua_lu_gp_show_attr_##_name);
2065
2066 /*
2067  * lu_gp_id
2068  */
2069 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2070         struct t10_alua_lu_gp *lu_gp,
2071         char *page)
2072 {
2073         if (!(lu_gp->lu_gp_valid_id))
2074                 return 0;
2075
2076         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2077 }
2078
2079 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2080         struct t10_alua_lu_gp *lu_gp,
2081         const char *page,
2082         size_t count)
2083 {
2084         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2085         unsigned long lu_gp_id;
2086         int ret;
2087
2088         ret = strict_strtoul(page, 0, &lu_gp_id);
2089         if (ret < 0) {
2090                 printk(KERN_ERR "strict_strtoul() returned %d for"
2091                         " lu_gp_id\n", ret);
2092                 return -EINVAL;
2093         }
2094         if (lu_gp_id > 0x0000ffff) {
2095                 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2096                         " 0x0000ffff\n", lu_gp_id);
2097                 return -EINVAL;
2098         }
2099
2100         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2101         if (ret < 0)
2102                 return -EINVAL;
2103
2104         printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2105                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2106                 config_item_name(&alua_lu_gp_cg->cg_item),
2107                 lu_gp->lu_gp_id);
2108
2109         return count;
2110 }
2111
2112 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2113
2114 /*
2115  * members
2116  */
2117 static ssize_t target_core_alua_lu_gp_show_attr_members(
2118         struct t10_alua_lu_gp *lu_gp,
2119         char *page)
2120 {
2121         struct se_device *dev;
2122         struct se_hba *hba;
2123         struct se_subsystem_dev *su_dev;
2124         struct t10_alua_lu_gp_member *lu_gp_mem;
2125         ssize_t len = 0, cur_len;
2126         unsigned char buf[LU_GROUP_NAME_BUF];
2127
2128         memset(buf, 0, LU_GROUP_NAME_BUF);
2129
2130         spin_lock(&lu_gp->lu_gp_lock);
2131         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2132                 dev = lu_gp_mem->lu_gp_mem_dev;
2133                 su_dev = dev->se_sub_dev;
2134                 hba = su_dev->se_dev_hba;
2135
2136                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2137                         config_item_name(&hba->hba_group.cg_item),
2138                         config_item_name(&su_dev->se_dev_group.cg_item));
2139                 cur_len++; /* Extra byte for NULL terminator */
2140
2141                 if ((cur_len + len) > PAGE_SIZE) {
2142                         printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2143                                 "_members buffer\n");
2144                         break;
2145                 }
2146                 memcpy(page+len, buf, cur_len);
2147                 len += cur_len;
2148         }
2149         spin_unlock(&lu_gp->lu_gp_lock);
2150
2151         return len;
2152 }
2153
2154 SE_DEV_ALUA_LU_ATTR_RO(members);
2155
2156 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2157
2158 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2159         &target_core_alua_lu_gp_lu_gp_id.attr,
2160         &target_core_alua_lu_gp_members.attr,
2161         NULL,
2162 };
2163
2164 static void target_core_alua_lu_gp_release(struct config_item *item)
2165 {
2166         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2167                         struct t10_alua_lu_gp, lu_gp_group);
2168
2169         core_alua_free_lu_gp(lu_gp);
2170 }
2171
2172 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2173         .release                = target_core_alua_lu_gp_release,
2174         .show_attribute         = target_core_alua_lu_gp_attr_show,
2175         .store_attribute        = target_core_alua_lu_gp_attr_store,
2176 };
2177
2178 static struct config_item_type target_core_alua_lu_gp_cit = {
2179         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2180         .ct_attrs               = target_core_alua_lu_gp_attrs,
2181         .ct_owner               = THIS_MODULE,
2182 };
2183
2184 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2185
2186 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2187
2188 static struct config_group *target_core_alua_create_lu_gp(
2189         struct config_group *group,
2190         const char *name)
2191 {
2192         struct t10_alua_lu_gp *lu_gp;
2193         struct config_group *alua_lu_gp_cg = NULL;
2194         struct config_item *alua_lu_gp_ci = NULL;
2195
2196         lu_gp = core_alua_allocate_lu_gp(name, 0);
2197         if (IS_ERR(lu_gp))
2198                 return NULL;
2199
2200         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2201         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2202
2203         config_group_init_type_name(alua_lu_gp_cg, name,
2204                         &target_core_alua_lu_gp_cit);
2205
2206         printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2207                 " Group: core/alua/lu_gps/%s\n",
2208                 config_item_name(alua_lu_gp_ci));
2209
2210         return alua_lu_gp_cg;
2211
2212 }
2213
2214 static void target_core_alua_drop_lu_gp(
2215         struct config_group *group,
2216         struct config_item *item)
2217 {
2218         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2219                         struct t10_alua_lu_gp, lu_gp_group);
2220
2221         printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2222                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2223                 config_item_name(item), lu_gp->lu_gp_id);
2224         /*
2225          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2226          * -> target_core_alua_lu_gp_release()
2227          */
2228         config_item_put(item);
2229 }
2230
2231 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2232         .make_group             = &target_core_alua_create_lu_gp,
2233         .drop_item              = &target_core_alua_drop_lu_gp,
2234 };
2235
2236 static struct config_item_type target_core_alua_lu_gps_cit = {
2237         .ct_item_ops            = NULL,
2238         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2239         .ct_owner               = THIS_MODULE,
2240 };
2241
2242 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2243
2244 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2245
2246 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2247 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2248 static struct target_core_alua_tg_pt_gp_attribute                       \
2249                         target_core_alua_tg_pt_gp_##_name =             \
2250         __CONFIGFS_EATTR(_name, _mode,                                  \
2251         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2252         target_core_alua_tg_pt_gp_store_attr_##_name);
2253
2254 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2255 static struct target_core_alua_tg_pt_gp_attribute                       \
2256                         target_core_alua_tg_pt_gp_##_name =             \
2257         __CONFIGFS_EATTR_RO(_name,                                      \
2258         target_core_alua_tg_pt_gp_show_attr_##_name);
2259
2260 /*
2261  * alua_access_state
2262  */
2263 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2264         struct t10_alua_tg_pt_gp *tg_pt_gp,
2265         char *page)
2266 {
2267         return sprintf(page, "%d\n",
2268                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2269 }
2270
2271 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2272         struct t10_alua_tg_pt_gp *tg_pt_gp,
2273         const char *page,
2274         size_t count)
2275 {
2276         struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2277         unsigned long tmp;
2278         int new_state, ret;
2279
2280         if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2281                 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2282                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2283                 return -EINVAL;
2284         }
2285
2286         ret = strict_strtoul(page, 0, &tmp);
2287         if (ret < 0) {
2288                 printk("Unable to extract new ALUA access state from"
2289                                 " %s\n", page);
2290                 return -EINVAL;
2291         }
2292         new_state = (int)tmp;
2293
2294         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2295                 printk(KERN_ERR "Unable to process implict configfs ALUA"
2296                         " transition while TPGS_IMPLICT_ALUA is diabled\n");
2297                 return -EINVAL;
2298         }
2299
2300         ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2301                                         NULL, NULL, new_state, 0);
2302         return (!ret) ? count : -EINVAL;
2303 }
2304
2305 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2306
2307 /*
2308  * alua_access_status
2309  */
2310 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2311         struct t10_alua_tg_pt_gp *tg_pt_gp,
2312         char *page)
2313 {
2314         return sprintf(page, "%s\n",
2315                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2316 }
2317
2318 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2319         struct t10_alua_tg_pt_gp *tg_pt_gp,
2320         const char *page,
2321         size_t count)
2322 {
2323         unsigned long tmp;
2324         int new_status, ret;
2325
2326         if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2327                 printk(KERN_ERR "Unable to do set ALUA access status on non"
2328                         " valid tg_pt_gp ID: %hu\n",
2329                         tg_pt_gp->tg_pt_gp_valid_id);
2330                 return -EINVAL;
2331         }
2332
2333         ret = strict_strtoul(page, 0, &tmp);
2334         if (ret < 0) {
2335                 printk(KERN_ERR "Unable to extract new ALUA access status"
2336                                 " from %s\n", page);
2337                 return -EINVAL;
2338         }
2339         new_status = (int)tmp;
2340
2341         if ((new_status != ALUA_STATUS_NONE) &&
2342             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2343             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2344                 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2345                                 new_status);
2346                 return -EINVAL;
2347         }
2348
2349         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2350         return count;
2351 }
2352
2353 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2354
2355 /*
2356  * alua_access_type
2357  */
2358 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2359         struct t10_alua_tg_pt_gp *tg_pt_gp,
2360         char *page)
2361 {
2362         return core_alua_show_access_type(tg_pt_gp, page);
2363 }
2364
2365 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2366         struct t10_alua_tg_pt_gp *tg_pt_gp,
2367         const char *page,
2368         size_t count)
2369 {
2370         return core_alua_store_access_type(tg_pt_gp, page, count);
2371 }
2372
2373 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2374
2375 /*
2376  * alua_write_metadata
2377  */
2378 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2379         struct t10_alua_tg_pt_gp *tg_pt_gp,
2380         char *page)
2381 {
2382         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2383 }
2384
2385 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2386         struct t10_alua_tg_pt_gp *tg_pt_gp,
2387         const char *page,
2388         size_t count)
2389 {
2390         unsigned long tmp;
2391         int ret;
2392
2393         ret = strict_strtoul(page, 0, &tmp);
2394         if (ret < 0) {
2395                 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2396                 return -EINVAL;
2397         }
2398
2399         if ((tmp != 0) && (tmp != 1)) {
2400                 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2401                         " %lu\n", tmp);
2402                 return -EINVAL;
2403         }
2404         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2405
2406         return count;
2407 }
2408
2409 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2410
2411
2412
2413 /*
2414  * nonop_delay_msecs
2415  */
2416 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2417         struct t10_alua_tg_pt_gp *tg_pt_gp,
2418         char *page)
2419 {
2420         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2421
2422 }
2423
2424 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2425         struct t10_alua_tg_pt_gp *tg_pt_gp,
2426         const char *page,
2427         size_t count)
2428 {
2429         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2430 }
2431
2432 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2433
2434 /*
2435  * trans_delay_msecs
2436  */
2437 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2438         struct t10_alua_tg_pt_gp *tg_pt_gp,
2439         char *page)
2440 {
2441         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2442 }
2443
2444 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2445         struct t10_alua_tg_pt_gp *tg_pt_gp,
2446         const char *page,
2447         size_t count)
2448 {
2449         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2450 }
2451
2452 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2453
2454 /*
2455  * preferred
2456  */
2457
2458 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2459         struct t10_alua_tg_pt_gp *tg_pt_gp,
2460         char *page)
2461 {
2462         return core_alua_show_preferred_bit(tg_pt_gp, page);
2463 }
2464
2465 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2466         struct t10_alua_tg_pt_gp *tg_pt_gp,
2467         const char *page,
2468         size_t count)
2469 {
2470         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2471 }
2472
2473 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2474
2475 /*
2476  * tg_pt_gp_id
2477  */
2478 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2479         struct t10_alua_tg_pt_gp *tg_pt_gp,
2480         char *page)
2481 {
2482         if (!(tg_pt_gp->tg_pt_gp_valid_id))
2483                 return 0;
2484
2485         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2486 }
2487
2488 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2489         struct t10_alua_tg_pt_gp *tg_pt_gp,
2490         const char *page,
2491         size_t count)
2492 {
2493         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2494         unsigned long tg_pt_gp_id;
2495         int ret;
2496
2497         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2498         if (ret < 0) {
2499                 printk(KERN_ERR "strict_strtoul() returned %d for"
2500                         " tg_pt_gp_id\n", ret);
2501                 return -EINVAL;
2502         }
2503         if (tg_pt_gp_id > 0x0000ffff) {
2504                 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2505                         " 0x0000ffff\n", tg_pt_gp_id);
2506                 return -EINVAL;
2507         }
2508
2509         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2510         if (ret < 0)
2511                 return -EINVAL;
2512
2513         printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2514                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2515                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2516                 tg_pt_gp->tg_pt_gp_id);
2517
2518         return count;
2519 }
2520
2521 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2522
2523 /*
2524  * members
2525  */
2526 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2527         struct t10_alua_tg_pt_gp *tg_pt_gp,
2528         char *page)
2529 {
2530         struct se_port *port;
2531         struct se_portal_group *tpg;
2532         struct se_lun *lun;
2533         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2534         ssize_t len = 0, cur_len;
2535         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2536
2537         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2538
2539         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2540         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2541                         tg_pt_gp_mem_list) {
2542                 port = tg_pt_gp_mem->tg_pt;
2543                 tpg = port->sep_tpg;
2544                 lun = port->sep_lun;
2545
2546                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2547                         "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
2548                         TPG_TFO(tpg)->tpg_get_wwn(tpg),
2549                         TPG_TFO(tpg)->tpg_get_tag(tpg),
2550                         config_item_name(&lun->lun_group.cg_item));
2551                 cur_len++; /* Extra byte for NULL terminator */
2552
2553                 if ((cur_len + len) > PAGE_SIZE) {
2554                         printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2555                                 "_members buffer\n");
2556                         break;
2557                 }
2558                 memcpy(page+len, buf, cur_len);
2559                 len += cur_len;
2560         }
2561         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2562
2563         return len;
2564 }
2565
2566 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2567
2568 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2569                         tg_pt_gp_group);
2570
2571 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2572         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2573         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2574         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2575         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2576         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2577         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2578         &target_core_alua_tg_pt_gp_preferred.attr,
2579         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2580         &target_core_alua_tg_pt_gp_members.attr,
2581         NULL,
2582 };
2583
2584 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2585 {
2586         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2587                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2588
2589         core_alua_free_tg_pt_gp(tg_pt_gp);
2590 }
2591
2592 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2593         .release                = target_core_alua_tg_pt_gp_release,
2594         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2595         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2596 };
2597
2598 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2599         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2600         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2601         .ct_owner               = THIS_MODULE,
2602 };
2603
2604 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2605
2606 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2607
2608 static struct config_group *target_core_alua_create_tg_pt_gp(
2609         struct config_group *group,
2610         const char *name)
2611 {
2612         struct t10_alua *alua = container_of(group, struct t10_alua,
2613                                         alua_tg_pt_gps_group);
2614         struct t10_alua_tg_pt_gp *tg_pt_gp;
2615         struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2616         struct config_group *alua_tg_pt_gp_cg = NULL;
2617         struct config_item *alua_tg_pt_gp_ci = NULL;
2618
2619         tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2620         if (!(tg_pt_gp))
2621                 return NULL;
2622
2623         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2624         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2625
2626         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2627                         &target_core_alua_tg_pt_gp_cit);
2628
2629         printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2630                 " Group: alua/tg_pt_gps/%s\n",
2631                 config_item_name(alua_tg_pt_gp_ci));
2632
2633         return alua_tg_pt_gp_cg;
2634 }
2635
2636 static void target_core_alua_drop_tg_pt_gp(
2637         struct config_group *group,
2638         struct config_item *item)
2639 {
2640         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2641                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2642
2643         printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2644                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2645                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2646         /*
2647          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2648          * -> target_core_alua_tg_pt_gp_release().
2649          */
2650         config_item_put(item);
2651 }
2652
2653 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2654         .make_group             = &target_core_alua_create_tg_pt_gp,
2655         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2656 };
2657
2658 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2659         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2660         .ct_owner               = THIS_MODULE,
2661 };
2662
2663 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2664
2665 /* Start functions for struct config_item_type target_core_alua_cit */
2666
2667 /*
2668  * target_core_alua_cit is a ConfigFS group that lives under
2669  * /sys/kernel/config/target/core/alua.  There are default groups
2670  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2671  * target_core_alua_cit in target_core_init_configfs() below.
2672  */
2673 static struct config_item_type target_core_alua_cit = {
2674         .ct_item_ops            = NULL,
2675         .ct_attrs               = NULL,
2676         .ct_owner               = THIS_MODULE,
2677 };
2678
2679 /* End functions for struct config_item_type target_core_alua_cit */
2680
2681 /* Start functions for struct config_item_type target_core_hba_cit */
2682
2683 static struct config_group *target_core_make_subdev(
2684         struct config_group *group,
2685         const char *name)
2686 {
2687         struct t10_alua_tg_pt_gp *tg_pt_gp;
2688         struct se_subsystem_dev *se_dev;
2689         struct se_subsystem_api *t;
2690         struct config_item *hba_ci = &group->cg_item;
2691         struct se_hba *hba = item_to_hba(hba_ci);
2692         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2693
2694         if (mutex_lock_interruptible(&hba->hba_access_mutex))
2695                 return NULL;
2696
2697         /*
2698          * Locate the struct se_subsystem_api from parent's struct se_hba.
2699          */
2700         t = hba->transport;
2701
2702         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2703         if (!se_dev) {
2704                 printk(KERN_ERR "Unable to allocate memory for"
2705                                 " struct se_subsystem_dev\n");
2706                 goto unlock;
2707         }
2708         INIT_LIST_HEAD(&se_dev->g_se_dev_list);
2709         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2710         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2711         INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
2712         INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
2713         spin_lock_init(&se_dev->t10_reservation.registration_lock);
2714         spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
2715         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2716         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2717         spin_lock_init(&se_dev->se_dev_lock);
2718         se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2719         se_dev->t10_wwn.t10_sub_dev = se_dev;
2720         se_dev->t10_alua.t10_sub_dev = se_dev;
2721         se_dev->se_dev_attrib.da_sub_dev = se_dev;
2722
2723         se_dev->se_dev_hba = hba;
2724         dev_cg = &se_dev->se_dev_group;
2725
2726         dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
2727                         GFP_KERNEL);
2728         if (!(dev_cg->default_groups))
2729                 goto out;
2730         /*
2731          * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2732          * for ->allocate_virtdevice()
2733          *
2734          * se_dev->se_dev_ptr will be set after ->create_virtdev()
2735          * has been called successfully in the next level up in the
2736          * configfs tree for device object's struct config_group.
2737          */
2738         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2739         if (!(se_dev->se_dev_su_ptr)) {
2740                 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2741                         " from allocate_virtdevice()\n");
2742                 goto out;
2743         }
2744         spin_lock(&se_global->g_device_lock);
2745         list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
2746         spin_unlock(&se_global->g_device_lock);
2747
2748         config_group_init_type_name(&se_dev->se_dev_group, name,
2749                         &target_core_dev_cit);
2750         config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2751                         &target_core_dev_attrib_cit);
2752         config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2753                         &target_core_dev_pr_cit);
2754         config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2755                         &target_core_dev_wwn_cit);
2756         config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2757                         "alua", &target_core_alua_tg_pt_gps_cit);
2758         dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2759         dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2760         dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2761         dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2762         dev_cg->default_groups[4] = NULL;
2763         /*
2764          * Add core/$HBA/$DEV/alua/tg_pt_gps/default_tg_pt_gp
2765          */
2766         tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2767         if (!(tg_pt_gp))
2768                 goto out;
2769
2770         tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2771         tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2772                                 GFP_KERNEL);
2773         if (!(tg_pt_gp_cg->default_groups)) {
2774                 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2775                                 "default_groups\n");
2776                 goto out;
2777         }
2778
2779         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2780                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2781         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2782         tg_pt_gp_cg->default_groups[1] = NULL;
2783         T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
2784
2785         printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2786                 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2787
2788         mutex_unlock(&hba->hba_access_mutex);
2789         return &se_dev->se_dev_group;
2790 out:
2791         if (T10_ALUA(se_dev)->default_tg_pt_gp) {
2792                 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2793                 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2794         }
2795         if (tg_pt_gp_cg)
2796                 kfree(tg_pt_gp_cg->default_groups);
2797         if (dev_cg)
2798                 kfree(dev_cg->default_groups);
2799         if (se_dev->se_dev_su_ptr)
2800                 t->free_device(se_dev->se_dev_su_ptr);
2801         kfree(se_dev);
2802 unlock:
2803         mutex_unlock(&hba->hba_access_mutex);
2804         return NULL;
2805 }
2806
2807 static void target_core_drop_subdev(
2808         struct config_group *group,
2809         struct config_item *item)
2810 {
2811         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2812                                 struct se_subsystem_dev, se_dev_group);
2813         struct se_hba *hba;
2814         struct se_subsystem_api *t;
2815         struct config_item *df_item;
2816         struct config_group *dev_cg, *tg_pt_gp_cg;
2817         int i;
2818
2819         hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2820
2821         mutex_lock(&hba->hba_access_mutex);
2822         t = hba->transport;
2823
2824         spin_lock(&se_global->g_device_lock);
2825         list_del(&se_dev->g_se_dev_list);
2826         spin_unlock(&se_global->g_device_lock);
2827
2828         tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2829         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2830                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2831                 tg_pt_gp_cg->default_groups[i] = NULL;
2832                 config_item_put(df_item);
2833         }
2834         kfree(tg_pt_gp_cg->default_groups);
2835         /*
2836          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2837          * directly from target_core_alua_tg_pt_gp_release().
2838          */
2839         T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2840
2841         dev_cg = &se_dev->se_dev_group;
2842         for (i = 0; dev_cg->default_groups[i]; i++) {
2843                 df_item = &dev_cg->default_groups[i]->cg_item;
2844                 dev_cg->default_groups[i] = NULL;
2845                 config_item_put(df_item);
2846         }
2847         /*
2848          * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2849          * from target_core_dev_item_ops->release() ->target_core_dev_release().
2850          */
2851         config_item_put(item);
2852         mutex_unlock(&hba->hba_access_mutex);
2853 }
2854
2855 static struct configfs_group_operations target_core_hba_group_ops = {
2856         .make_group             = target_core_make_subdev,
2857         .drop_item              = target_core_drop_subdev,
2858 };
2859
2860 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2861 #define SE_HBA_ATTR(_name, _mode)                               \
2862 static struct target_core_hba_attribute                         \
2863                 target_core_hba_##_name =                       \
2864                 __CONFIGFS_EATTR(_name, _mode,                  \
2865                 target_core_hba_show_attr_##_name,              \
2866                 target_core_hba_store_attr_##_name);
2867
2868 #define SE_HBA_ATTR_RO(_name)                                   \
2869 static struct target_core_hba_attribute                         \
2870                 target_core_hba_##_name =                       \
2871                 __CONFIGFS_EATTR_RO(_name,                      \
2872                 target_core_hba_show_attr_##_name);
2873
2874 static ssize_t target_core_hba_show_attr_hba_info(
2875         struct se_hba *hba,
2876         char *page)
2877 {
2878         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2879                         hba->hba_id, hba->transport->name,
2880                         TARGET_CORE_CONFIGFS_VERSION);
2881 }
2882
2883 SE_HBA_ATTR_RO(hba_info);
2884
2885 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2886                                 char *page)
2887 {
2888         int hba_mode = 0;
2889
2890         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2891                 hba_mode = 1;
2892
2893         return sprintf(page, "%d\n", hba_mode);
2894 }
2895
2896 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2897                                 const char *page, size_t count)
2898 {
2899         struct se_subsystem_api *transport = hba->transport;
2900         unsigned long mode_flag;
2901         int ret;
2902
2903         if (transport->pmode_enable_hba == NULL)
2904                 return -EINVAL;
2905
2906         ret = strict_strtoul(page, 0, &mode_flag);
2907         if (ret < 0) {
2908                 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2909                 return -EINVAL;
2910         }
2911
2912         spin_lock(&hba->device_lock);
2913         if (!(list_empty(&hba->hba_dev_list))) {
2914                 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
2915                 spin_unlock(&hba->device_lock);
2916                 return -EINVAL;
2917         }
2918         spin_unlock(&hba->device_lock);
2919
2920         ret = transport->pmode_enable_hba(hba, mode_flag);
2921         if (ret < 0)
2922                 return -EINVAL;
2923         if (ret > 0)
2924                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2925         else if (ret == 0)
2926                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2927
2928         return count;
2929 }
2930
2931 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2932
2933 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2934
2935 static void target_core_hba_release(struct config_item *item)
2936 {
2937         struct se_hba *hba = container_of(to_config_group(item),
2938                                 struct se_hba, hba_group);
2939         core_delete_hba(hba);
2940 }
2941
2942 static struct configfs_attribute *target_core_hba_attrs[] = {
2943         &target_core_hba_hba_info.attr,
2944         &target_core_hba_hba_mode.attr,
2945         NULL,
2946 };
2947
2948 static struct configfs_item_operations target_core_hba_item_ops = {
2949         .release                = target_core_hba_release,
2950         .show_attribute         = target_core_hba_attr_show,
2951         .store_attribute        = target_core_hba_attr_store,
2952 };
2953
2954 static struct config_item_type target_core_hba_cit = {
2955         .ct_item_ops            = &target_core_hba_item_ops,
2956         .ct_group_ops           = &target_core_hba_group_ops,
2957         .ct_attrs               = target_core_hba_attrs,
2958         .ct_owner               = THIS_MODULE,
2959 };
2960
2961 static struct config_group *target_core_call_addhbatotarget(
2962         struct config_group *group,
2963         const char *name)
2964 {
2965         char *se_plugin_str, *str, *str2;
2966         struct se_hba *hba;
2967         char buf[TARGET_CORE_NAME_MAX_LEN];
2968         unsigned long plugin_dep_id = 0;
2969         int ret;
2970
2971         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2972         if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) {
2973                 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
2974                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2975                         TARGET_CORE_NAME_MAX_LEN);
2976                 return ERR_PTR(-ENAMETOOLONG);
2977         }
2978         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2979
2980         str = strstr(buf, "_");
2981         if (!(str)) {
2982                 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2983                 return ERR_PTR(-EINVAL);
2984         }
2985         se_plugin_str = buf;
2986         /*
2987          * Special case for subsystem plugins that have "_" in their names.
2988          * Namely rd_direct and rd_mcp..
2989          */
2990         str2 = strstr(str+1, "_");
2991         if ((str2)) {
2992                 *str2 = '\0'; /* Terminate for *se_plugin_str */
2993                 str2++; /* Skip to start of plugin dependent ID */
2994                 str = str2;
2995         } else {
2996                 *str = '\0'; /* Terminate for *se_plugin_str */
2997                 str++; /* Skip to start of plugin dependent ID */
2998         }
2999
3000         ret = strict_strtoul(str, 0, &plugin_dep_id);
3001         if (ret < 0) {
3002                 printk(KERN_ERR "strict_strtoul() returned %d for"
3003                                 " plugin_dep_id\n", ret);
3004                 return ERR_PTR(-EINVAL);
3005         }
3006         /*
3007          * Load up TCM subsystem plugins if they have not already been loaded.
3008          */
3009         if (transport_subsystem_check_init() < 0)
3010                 return ERR_PTR(-EINVAL);
3011
3012         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3013         if (IS_ERR(hba))
3014                 return ERR_CAST(hba);
3015
3016         config_group_init_type_name(&hba->hba_group, name,
3017                         &target_core_hba_cit);
3018
3019         return &hba->hba_group;
3020 }
3021
3022 static void target_core_call_delhbafromtarget(
3023         struct config_group *group,
3024         struct config_item *item)
3025 {
3026         /*
3027          * core_delete_hba() is called from target_core_hba_item_ops->release()
3028          * -> target_core_hba_release()
3029          */
3030         config_item_put(item);
3031 }
3032
3033 static struct configfs_group_operations target_core_group_ops = {
3034         .make_group     = target_core_call_addhbatotarget,
3035         .drop_item      = target_core_call_delhbafromtarget,
3036 };
3037
3038 static struct config_item_type target_core_cit = {
3039         .ct_item_ops    = NULL,
3040         .ct_group_ops   = &target_core_group_ops,
3041         .ct_attrs       = NULL,
3042         .ct_owner       = THIS_MODULE,
3043 };
3044
3045 /* Stop functions for struct config_item_type target_core_hba_cit */
3046
3047 static int target_core_init_configfs(void)
3048 {
3049         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3050         struct config_group *lu_gp_cg = NULL;
3051         struct configfs_subsystem *subsys;
3052         struct t10_alua_lu_gp *lu_gp;
3053         int ret;
3054
3055         printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3056                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3057                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3058
3059         subsys = target_core_subsystem[0];
3060         config_group_init(&subsys->su_group);
3061         mutex_init(&subsys->su_mutex);
3062
3063         INIT_LIST_HEAD(&g_tf_list);
3064         mutex_init(&g_tf_lock);
3065         init_scsi_index_table();
3066         ret = init_se_global();
3067         if (ret < 0)
3068                 return -1;
3069         /*
3070          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3071          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3072          */
3073         target_cg = &subsys->su_group;
3074         target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3075                                 GFP_KERNEL);
3076         if (!(target_cg->default_groups)) {
3077                 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3078                 goto out_global;
3079         }
3080
3081         config_group_init_type_name(&se_global->target_core_hbagroup,
3082                         "core", &target_core_cit);
3083         target_cg->default_groups[0] = &se_global->target_core_hbagroup;
3084         target_cg->default_groups[1] = NULL;
3085         /*
3086          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3087          */
3088         hba_cg = &se_global->target_core_hbagroup;
3089         hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3090                                 GFP_KERNEL);
3091         if (!(hba_cg->default_groups)) {
3092                 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3093                 goto out_global;
3094         }
3095         config_group_init_type_name(&se_global->alua_group,
3096                         "alua", &target_core_alua_cit);
3097         hba_cg->default_groups[0] = &se_global->alua_group;
3098         hba_cg->default_groups[1] = NULL;
3099         /*
3100          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3101          * groups under /sys/kernel/config/target/core/alua/
3102          */
3103         alua_cg = &se_global->alua_group;
3104         alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3105                         GFP_KERNEL);
3106         if (!(alua_cg->default_groups)) {
3107                 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3108                 goto out_global;
3109         }
3110
3111         config_group_init_type_name(&se_global->alua_lu_gps_group,
3112                         "lu_gps", &target_core_alua_lu_gps_cit);
3113         alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
3114         alua_cg->default_groups[1] = NULL;
3115         /*
3116          * Add core/alua/lu_gps/default_lu_gp
3117          */
3118         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3119         if (IS_ERR(lu_gp))
3120                 goto out_global;
3121
3122         lu_gp_cg = &se_global->alua_lu_gps_group;
3123         lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3124                         GFP_KERNEL);
3125         if (!(lu_gp_cg->default_groups)) {
3126                 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3127                 goto out_global;
3128         }
3129
3130         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3131                                 &target_core_alua_lu_gp_cit);
3132         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3133         lu_gp_cg->default_groups[1] = NULL;
3134         se_global->default_lu_gp = lu_gp;
3135         /*
3136          * Register the target_core_mod subsystem with configfs.
3137          */
3138         ret = configfs_register_subsystem(subsys);
3139         if (ret < 0) {
3140                 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3141                         ret, subsys->su_group.cg_item.ci_namebuf);
3142                 goto out_global;
3143         }
3144         printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3145                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3146                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3147         /*
3148          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3149          */
3150         ret = rd_module_init();
3151         if (ret < 0)
3152                 goto out;
3153
3154         if (core_dev_setup_virtual_lun0() < 0)
3155                 goto out;
3156
3157         return 0;
3158
3159 out:
3160         configfs_unregister_subsystem(subsys);
3161         core_dev_release_virtual_lun0();
3162         rd_module_exit();
3163 out_global:
3164         if (se_global->default_lu_gp) {
3165                 core_alua_free_lu_gp(se_global->default_lu_gp);
3166                 se_global->default_lu_gp = NULL;
3167         }
3168         if (lu_gp_cg)
3169                 kfree(lu_gp_cg->default_groups);
3170         if (alua_cg)
3171                 kfree(alua_cg->default_groups);
3172         if (hba_cg)
3173                 kfree(hba_cg->default_groups);
3174         kfree(target_cg->default_groups);
3175         release_se_global();
3176         return -1;
3177 }
3178
3179 static void target_core_exit_configfs(void)
3180 {
3181         struct configfs_subsystem *subsys;
3182         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3183         struct config_item *item;
3184         int i;
3185
3186         se_global->in_shutdown = 1;
3187         subsys = target_core_subsystem[0];
3188
3189         lu_gp_cg = &se_global->alua_lu_gps_group;
3190         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3191                 item = &lu_gp_cg->default_groups[i]->cg_item;
3192                 lu_gp_cg->default_groups[i] = NULL;
3193                 config_item_put(item);
3194         }
3195         kfree(lu_gp_cg->default_groups);
3196         lu_gp_cg->default_groups = NULL;
3197
3198         alua_cg = &se_global->alua_group;
3199         for (i = 0; alua_cg->default_groups[i]; i++) {
3200                 item = &alua_cg->default_groups[i]->cg_item;
3201                 alua_cg->default_groups[i] = NULL;
3202                 config_item_put(item);
3203         }
3204         kfree(alua_cg->default_groups);
3205         alua_cg->default_groups = NULL;
3206
3207         hba_cg = &se_global->target_core_hbagroup;
3208         for (i = 0; hba_cg->default_groups[i]; i++) {
3209                 item = &hba_cg->default_groups[i]->cg_item;
3210                 hba_cg->default_groups[i] = NULL;
3211                 config_item_put(item);
3212         }
3213         kfree(hba_cg->default_groups);
3214         hba_cg->default_groups = NULL;
3215         /*
3216          * We expect subsys->su_group.default_groups to be released
3217          * by configfs subsystem provider logic..
3218          */
3219         configfs_unregister_subsystem(subsys);
3220         kfree(subsys->su_group.default_groups);
3221
3222         core_alua_free_lu_gp(se_global->default_lu_gp);
3223         se_global->default_lu_gp = NULL;
3224
3225         printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3226                         " Infrastructure\n");
3227
3228         core_dev_release_virtual_lun0();
3229         rd_module_exit();
3230         release_se_global();
3231
3232         return;
3233 }
3234
3235 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3236 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3237 MODULE_LICENSE("GPL");
3238
3239 module_init(target_core_init_configfs);
3240 module_exit(target_core_exit_configfs);