drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * Copyright (c) 2008-2011 Rising Tide Systems
   7  * Copyright (c) 2008-2011 Linux-iSCSI.org
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  ****************************************************************************/
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <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 #include "target_core_stat.h"
  54
  55 static struct list_head g_tf_list;
  56 static struct mutex g_tf_lock;
  57
  58 struct target_core_configfs_attribute {
  59         struct configfs_attribute attr;
  60         ssize_t (*show)(void *, char *);
  61         ssize_t (*store)(void *, const char *, size_t);
  62 };
  63
  64 static inline struct se_hba *
  65 item_to_hba(struct config_item *item)
  66 {
  67         return container_of(to_config_group(item), struct se_hba, hba_group);
  68 }
  69
  70 /*
  71  * Attributes for /sys/kernel/config/target/
  72  */
  73 static ssize_t target_core_attr_show(struct config_item *item,
  74                                       struct configfs_attribute *attr,
  75                                       char *page)
  76 {
  77         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  78                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  79                 utsname()->sysname, utsname()->machine);
  80 }
  81
  82 static struct configfs_item_operations target_core_fabric_item_ops = {
  83         .show_attribute = target_core_attr_show,
  84 };
  85
  86 static struct configfs_attribute target_core_item_attr_version = {
  87         .ca_owner       = THIS_MODULE,
  88         .ca_name        = "version",
  89         .ca_mode        = S_IRUGO,
  90 };
  91
  92 static struct target_fabric_configfs *target_core_get_fabric(
  93         const char *name)
  94 {
  95         struct target_fabric_configfs *tf;
  96
  97         if (!(name))
  98                 return NULL;
  99
 100         mutex_lock(&g_tf_lock);
 101         list_for_each_entry(tf, &g_tf_list, tf_list) {
 102                 if (!(strcmp(tf->tf_name, name))) {
 103                         atomic_inc(&tf->tf_access_cnt);
 104                         mutex_unlock(&g_tf_lock);
 105                         return tf;
 106                 }
 107         }
 108         mutex_unlock(&g_tf_lock);
 109
 110         return NULL;
 111 }
 112
 113 /*
 114  * Called from struct target_core_group_ops->make_group()
 115  */
 116 static struct config_group *target_core_register_fabric(
 117         struct config_group *group,
 118         const char *name)
 119 {
 120         struct target_fabric_configfs *tf;
 121         int ret;
 122
 123         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
 124                         " %s\n", group, name);
 125         /*
 126          * Ensure that TCM subsystem plugins are loaded at this point for
 127          * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
 128          * LUN symlinks.
 129          */
 130         if (transport_subsystem_check_init() < 0)
 131                 return ERR_PTR(-EINVAL);
 132
 133         /*
 134          * Below are some hardcoded request_module() calls to automatically
 135          * local fabric modules when the following is called:
 136          *
 137          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 138          *
 139          * Note that this does not limit which TCM fabric module can be
 140          * registered, but simply provids auto loading logic for modules with
 141          * mkdir(2) system calls with known TCM fabric modules.
 142          */
 143         if (!(strncmp(name, "iscsi", 5))) {
 144                 /*
 145                  * Automatically load the LIO Target fabric module when the
 146                  * following is called:
 147                  *
 148                  * mkdir -p $CONFIGFS/target/iscsi
 149                  */
 150                 ret = request_module("iscsi_target_mod");
 151                 if (ret < 0) {
 152                         printk(KERN_ERR "request_module() failed for"
 153                                 " iscsi_target_mod.ko: %d\n", ret);
 154                         return ERR_PTR(-EINVAL);
 155                 }
 156         } else if (!(strncmp(name, "loopback", 8))) {
 157                 /*
 158                  * Automatically load the tcm_loop fabric module when the
 159                  * following is called:
 160                  *
 161                  * mkdir -p $CONFIGFS/target/loopback
 162                  */
 163                 ret = request_module("tcm_loop");
 164                 if (ret < 0) {
 165                         printk(KERN_ERR "request_module() failed for"
 166                                 " tcm_loop.ko: %d\n", ret);
 167                         return ERR_PTR(-EINVAL);
 168                 }
 169         }
 170
 171         tf = target_core_get_fabric(name);
 172         if (!(tf)) {
 173                 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
 174                         name);
 175                 return ERR_PTR(-EINVAL);
 176         }
 177         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
 178                         " %s\n", tf->tf_name);
 179         /*
 180          * On a successful target_core_get_fabric() look, the returned
 181          * struct target_fabric_configfs *tf will contain a usage reference.
 182          */
 183         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 184                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 185
 186         tf->tf_group.default_groups = tf->tf_default_groups;
 187         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 188         tf->tf_group.default_groups[1] = NULL;
 189
 190         config_group_init_type_name(&tf->tf_group, name,
 191                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 192         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 193                         &TF_CIT_TMPL(tf)->tfc_discovery_cit);
 194
 195         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 196                         " %s\n", tf->tf_group.cg_item.ci_name);
 197         /*
 198          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 199          */
 200         tf->tf_ops.tf_subsys = tf->tf_subsys;
 201         tf->tf_fabric = &tf->tf_group.cg_item;
 202         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 203                         " for %s\n", name);
 204
 205         return &tf->tf_group;
 206 }
 207
 208 /*
 209  * Called from struct target_core_group_ops->drop_item()
 210  */
 211 static void target_core_deregister_fabric(
 212         struct config_group *group,
 213         struct config_item *item)
 214 {
 215         struct target_fabric_configfs *tf = container_of(
 216                 to_config_group(item), struct target_fabric_configfs, tf_group);
 217         struct config_group *tf_group;
 218         struct config_item *df_item;
 219         int i;
 220
 221         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 222                 " tf list\n", config_item_name(item));
 223
 224         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 225                         " %s\n", tf->tf_name);
 226         atomic_dec(&tf->tf_access_cnt);
 227
 228         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
 229                         " tf->tf_fabric for %s\n", tf->tf_name);
 230         tf->tf_fabric = NULL;
 231
 232         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 233                         " %s\n", config_item_name(item));
 234
 235         tf_group = &tf->tf_group;
 236         for (i = 0; tf_group->default_groups[i]; i++) {
 237                 df_item = &tf_group->default_groups[i]->cg_item;
 238                 tf_group->default_groups[i] = NULL;
 239                 config_item_put(df_item);
 240         }
 241         config_item_put(item);
 242 }
 243
 244 static struct configfs_group_operations target_core_fabric_group_ops = {
 245         .make_group     = &target_core_register_fabric,
 246         .drop_item      = &target_core_deregister_fabric,
 247 };
 248
 249 /*
 250  * All item attributes appearing in /sys/kernel/target/ appear here.
 251  */
 252 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 253         &target_core_item_attr_version,
 254         NULL,
 255 };
 256
 257 /*
 258  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 259  */
 260 static struct config_item_type target_core_fabrics_item = {
 261         .ct_item_ops    = &target_core_fabric_item_ops,
 262         .ct_group_ops   = &target_core_fabric_group_ops,
 263         .ct_attrs       = target_core_fabric_item_attrs,
 264         .ct_owner       = THIS_MODULE,
 265 };
 266
 267 static struct configfs_subsystem target_core_fabrics = {
 268         .su_group = {
 269                 .cg_item = {
 270                         .ci_namebuf = "target",
 271                         .ci_type = &target_core_fabrics_item,
 272                 },
 273         },
 274 };
 275
 276 static struct configfs_subsystem *target_core_subsystem[] = {
 277         &target_core_fabrics,
 278         NULL,
 279 };
 280
 281 /*##############################################################################
 282 // Start functions called by external Target Fabrics Modules
 283 //############################################################################*/
 284
 285 /*
 286  * First function called by fabric modules to:
 287  *
 288  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 289  * 2) Add struct target_fabric_configfs to g_tf_list
 290  * 3) Return struct target_fabric_configfs to fabric module to be passed
 291  *    into target_fabric_configfs_register().
 292  */
 293 struct target_fabric_configfs *target_fabric_configfs_init(
 294         struct module *fabric_mod,
 295         const char *name)
 296 {
 297         struct target_fabric_configfs *tf;
 298
 299         if (!(fabric_mod)) {
 300                 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
 301                 return NULL;
 302         }
 303         if (!(name)) {
 304                 printk(KERN_ERR "Unable to locate passed fabric name\n");
 305                 return NULL;
 306         }
 307         if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
 308                 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
 309                         "_NAME_SIZE\n", name);
 310                 return NULL;
 311         }
 312
 313         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 314         if (!(tf))
 315                 return ERR_PTR(-ENOMEM);
 316
 317         INIT_LIST_HEAD(&tf->tf_list);
 318         atomic_set(&tf->tf_access_cnt, 0);
 319         /*
 320          * Setup the default generic struct config_item_type's (cits) in
 321          * struct target_fabric_configfs->tf_cit_tmpl
 322          */
 323         tf->tf_module = fabric_mod;
 324         target_fabric_setup_cits(tf);
 325
 326         tf->tf_subsys = target_core_subsystem[0];
 327         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 328
 329         mutex_lock(&g_tf_lock);
 330         list_add_tail(&tf->tf_list, &g_tf_list);
 331         mutex_unlock(&g_tf_lock);
 332
 333         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 334                         ">>>>>>>>>>>>>>\n");
 335         printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
 336                         " %s\n", tf, tf->tf_name);
 337         return tf;
 338 }
 339 EXPORT_SYMBOL(target_fabric_configfs_init);
 340
 341 /*
 342  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 343  */
 344 void target_fabric_configfs_free(
 345         struct target_fabric_configfs *tf)
 346 {
 347         mutex_lock(&g_tf_lock);
 348         list_del(&tf->tf_list);
 349         mutex_unlock(&g_tf_lock);
 350
 351         kfree(tf);
 352 }
 353 EXPORT_SYMBOL(target_fabric_configfs_free);
 354
 355 /*
 356  * Perform a sanity check of the passed tf->tf_ops before completing
 357  * TCM fabric module registration.
 358  */
 359 static int target_fabric_tf_ops_check(
 360         struct target_fabric_configfs *tf)
 361 {
 362         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 363
 364         if (!(tfo->get_fabric_name)) {
 365                 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
 366                 return -EINVAL;
 367         }
 368         if (!(tfo->get_fabric_proto_ident)) {
 369                 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
 370                 return -EINVAL;
 371         }
 372         if (!(tfo->tpg_get_wwn)) {
 373                 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
 374                 return -EINVAL;
 375         }
 376         if (!(tfo->tpg_get_tag)) {
 377                 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
 378                 return -EINVAL;
 379         }
 380         if (!(tfo->tpg_get_default_depth)) {
 381                 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
 382                 return -EINVAL;
 383         }
 384         if (!(tfo->tpg_get_pr_transport_id)) {
 385                 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
 386                 return -EINVAL;
 387         }
 388         if (!(tfo->tpg_get_pr_transport_id_len)) {
 389                 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
 390                 return -EINVAL;
 391         }
 392         if (!(tfo->tpg_check_demo_mode)) {
 393                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
 394                 return -EINVAL;
 395         }
 396         if (!(tfo->tpg_check_demo_mode_cache)) {
 397                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
 398                 return -EINVAL;
 399         }
 400         if (!(tfo->tpg_check_demo_mode_write_protect)) {
 401                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
 402                 return -EINVAL;
 403         }
 404         if (!(tfo->tpg_check_prod_mode_write_protect)) {
 405                 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
 406                 return -EINVAL;
 407         }
 408         if (!(tfo->tpg_alloc_fabric_acl)) {
 409                 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
 410                 return -EINVAL;
 411         }
 412         if (!(tfo->tpg_release_fabric_acl)) {
 413                 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
 414                 return -EINVAL;
 415         }
 416         if (!(tfo->tpg_get_inst_index)) {
 417                 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
 418                 return -EINVAL;
 419         }
 420         if (!(tfo->release_cmd_to_pool)) {
 421                 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
 422                 return -EINVAL;
 423         }
 424         if (!(tfo->release_cmd_direct)) {
 425                 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
 426                 return -EINVAL;
 427         }
 428         if (!(tfo->shutdown_session)) {
 429                 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
 430                 return -EINVAL;
 431         }
 432         if (!(tfo->close_session)) {
 433                 printk(KERN_ERR "Missing tfo->close_session()\n");
 434                 return -EINVAL;
 435         }
 436         if (!(tfo->stop_session)) {
 437                 printk(KERN_ERR "Missing tfo->stop_session()\n");
 438                 return -EINVAL;
 439         }
 440         if (!(tfo->fall_back_to_erl0)) {
 441                 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
 442                 return -EINVAL;
 443         }
 444         if (!(tfo->sess_logged_in)) {
 445                 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
 446                 return -EINVAL;
 447         }
 448         if (!(tfo->sess_get_index)) {
 449                 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
 450                 return -EINVAL;
 451         }
 452         if (!(tfo->write_pending)) {
 453                 printk(KERN_ERR "Missing tfo->write_pending()\n");
 454                 return -EINVAL;
 455         }
 456         if (!(tfo->write_pending_status)) {
 457                 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
 458                 return -EINVAL;
 459         }
 460         if (!(tfo->set_default_node_attributes)) {
 461                 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
 462                 return -EINVAL;
 463         }
 464         if (!(tfo->get_task_tag)) {
 465                 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
 466                 return -EINVAL;
 467         }
 468         if (!(tfo->get_cmd_state)) {
 469                 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
 470                 return -EINVAL;
 471         }
 472         if (!(tfo->new_cmd_failure)) {
 473                 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
 474                 return -EINVAL;
 475         }
 476         if (!(tfo->queue_data_in)) {
 477                 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
 478                 return -EINVAL;
 479         }
 480         if (!(tfo->queue_status)) {
 481                 printk(KERN_ERR "Missing tfo->queue_status()\n");
 482                 return -EINVAL;
 483         }
 484         if (!(tfo->queue_tm_rsp)) {
 485                 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
 486                 return -EINVAL;
 487         }
 488         if (!(tfo->set_fabric_sense_len)) {
 489                 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
 490                 return -EINVAL;
 491         }
 492         if (!(tfo->get_fabric_sense_len)) {
 493                 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
 494                 return -EINVAL;
 495         }
 496         if (!(tfo->is_state_remove)) {
 497                 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
 498                 return -EINVAL;
 499         }
 500         if (!(tfo->pack_lun)) {
 501                 printk(KERN_ERR "Missing tfo->pack_lun()\n");
 502                 return -EINVAL;
 503         }
 504         /*
 505          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 506          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 507          * target_core_fabric_configfs.c WWN+TPG group context code.
 508          */
 509         if (!(tfo->fabric_make_wwn)) {
 510                 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
 511                 return -EINVAL;
 512         }
 513         if (!(tfo->fabric_drop_wwn)) {
 514                 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
 515                 return -EINVAL;
 516         }
 517         if (!(tfo->fabric_make_tpg)) {
 518                 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
 519                 return -EINVAL;
 520         }
 521         if (!(tfo->fabric_drop_tpg)) {
 522                 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
 523                 return -EINVAL;
 524         }
 525
 526         return 0;
 527 }
 528
 529 /*
 530  * Called 2nd from fabric module with returned parameter of
 531  * struct target_fabric_configfs * from target_fabric_configfs_init().
 532  *
 533  * Upon a successful registration, the new fabric's struct config_item is
 534  * return.  Also, a pointer to this struct is set in the passed
 535  * struct target_fabric_configfs.
 536  */
 537 int target_fabric_configfs_register(
 538         struct target_fabric_configfs *tf)
 539 {
 540         struct config_group *su_group;
 541         int ret;
 542
 543         if (!(tf)) {
 544                 printk(KERN_ERR "Unable to locate target_fabric_configfs"
 545                         " pointer\n");
 546                 return -EINVAL;
 547         }
 548         if (!(tf->tf_subsys)) {
 549                 printk(KERN_ERR "Unable to target struct config_subsystem"
 550                         " pointer\n");
 551                 return -EINVAL;
 552         }
 553         su_group = &tf->tf_subsys->su_group;
 554         if (!(su_group)) {
 555                 printk(KERN_ERR "Unable to locate target struct config_group"
 556                         " pointer\n");
 557                 return -EINVAL;
 558         }
 559         ret = target_fabric_tf_ops_check(tf);
 560         if (ret < 0)
 561                 return ret;
 562
 563         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 564                 ">>>>>>>>>>\n");
 565         return 0;
 566 }
 567 EXPORT_SYMBOL(target_fabric_configfs_register);
 568
 569 void target_fabric_configfs_deregister(
 570         struct target_fabric_configfs *tf)
 571 {
 572         struct config_group *su_group;
 573         struct configfs_subsystem *su;
 574
 575         if (!(tf)) {
 576                 printk(KERN_ERR "Unable to locate passed target_fabric_"
 577                         "configfs\n");
 578                 return;
 579         }
 580         su = tf->tf_subsys;
 581         if (!(su)) {
 582                 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
 583                         " pointer\n");
 584                 return;
 585         }
 586         su_group = &tf->tf_subsys->su_group;
 587         if (!(su_group)) {
 588                 printk(KERN_ERR "Unable to locate target struct config_group"
 589                         " pointer\n");
 590                 return;
 591         }
 592
 593         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 594                         ">>>>>>>>>>>>\n");
 595         mutex_lock(&g_tf_lock);
 596         if (atomic_read(&tf->tf_access_cnt)) {
 597                 mutex_unlock(&g_tf_lock);
 598                 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
 599                         tf->tf_name);
 600                 BUG();
 601         }
 602         list_del(&tf->tf_list);
 603         mutex_unlock(&g_tf_lock);
 604
 605         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 606                         " %s\n", tf->tf_name);
 607         tf->tf_module = NULL;
 608         tf->tf_subsys = NULL;
 609         kfree(tf);
 610
 611         printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 612                         ">>>>>\n");
 613         return;
 614 }
 615 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 616
 617 /*##############################################################################
 618 // Stop functions called by external Target Fabrics Modules
 619 //############################################################################*/
 620
 621 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 622
 623 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 624 static ssize_t target_core_dev_show_attr_##_name(                       \
 625         struct se_dev_attrib *da,                                       \
 626         char *page)                                                     \
 627 {                                                                       \
 628         struct se_device *dev;                                          \
 629         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 630         ssize_t rb;                                                     \
 631                                                                         \
 632         spin_lock(&se_dev->se_dev_lock);                                \
 633         dev = se_dev->se_dev_ptr;                                       \
 634         if (!(dev)) {                                                   \
 635                 spin_unlock(&se_dev->se_dev_lock);                      \
 636                 return -ENODEV;                                         \
 637         }                                                               \
 638         rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
 639         spin_unlock(&se_dev->se_dev_lock);                              \
 640                                                                         \
 641         return rb;                                                      \
 642 }
 643
 644 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 645 static ssize_t target_core_dev_store_attr_##_name(                      \
 646         struct se_dev_attrib *da,                                       \
 647         const char *page,                                               \
 648         size_t count)                                                   \
 649 {                                                                       \
 650         struct se_device *dev;                                          \
 651         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 652         unsigned long val;                                              \
 653         int ret;                                                        \
 654                                                                         \
 655         spin_lock(&se_dev->se_dev_lock);                                \
 656         dev = se_dev->se_dev_ptr;                                       \
 657         if (!(dev)) {                                                   \
 658                 spin_unlock(&se_dev->se_dev_lock);                      \
 659                 return -ENODEV;                                         \
 660         }                                                               \
 661         ret = strict_strtoul(page, 0, &val);                            \
 662         if (ret < 0) {                                                  \
 663                 spin_unlock(&se_dev->se_dev_lock);                      \
 664                 printk(KERN_ERR "strict_strtoul() failed with"          \
 665                         " ret: %d\n", ret);                             \
 666                 return -EINVAL;                                         \
 667         }                                                               \
 668         ret = se_dev_set_##_name(dev, (u32)val);                        \
 669         spin_unlock(&se_dev->se_dev_lock);                              \
 670                                                                         \
 671         return (!ret) ? count : -EINVAL;                                \
 672 }
 673
 674 #define DEF_DEV_ATTRIB(_name)                                           \
 675 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 676 DEF_DEV_ATTRIB_STORE(_name);
 677
 678 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 679 DEF_DEV_ATTRIB_SHOW(_name);
 680
 681 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 682 #define SE_DEV_ATTR(_name, _mode)                                       \
 683 static struct target_core_dev_attrib_attribute                          \
 684                         target_core_dev_attrib_##_name =                \
 685                 __CONFIGFS_EATTR(_name, _mode,                          \
 686                 target_core_dev_show_attr_##_name,                      \
 687                 target_core_dev_store_attr_##_name);
 688
 689 #define SE_DEV_ATTR_RO(_name);                                          \
 690 static struct target_core_dev_attrib_attribute                          \
 691                         target_core_dev_attrib_##_name =                \
 692         __CONFIGFS_EATTR_RO(_name,                                      \
 693         target_core_dev_show_attr_##_name);
 694
 695 DEF_DEV_ATTRIB(emulate_dpo);
 696 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 697
 698 DEF_DEV_ATTRIB(emulate_fua_write);
 699 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 700
 701 DEF_DEV_ATTRIB(emulate_fua_read);
 702 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 703
 704 DEF_DEV_ATTRIB(emulate_write_cache);
 705 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 706
 707 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 708 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 709
 710 DEF_DEV_ATTRIB(emulate_tas);
 711 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 712
 713 DEF_DEV_ATTRIB(emulate_tpu);
 714 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 715
 716 DEF_DEV_ATTRIB(emulate_tpws);
 717 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 718
 719 DEF_DEV_ATTRIB(enforce_pr_isids);
 720 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 721
 722 DEF_DEV_ATTRIB_RO(hw_block_size);
 723 SE_DEV_ATTR_RO(hw_block_size);
 724
 725 DEF_DEV_ATTRIB(block_size);
 726 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 727
 728 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 729 SE_DEV_ATTR_RO(hw_max_sectors);
 730
 731 DEF_DEV_ATTRIB(max_sectors);
 732 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
 733
 734 DEF_DEV_ATTRIB(optimal_sectors);
 735 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 736
 737 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 738 SE_DEV_ATTR_RO(hw_queue_depth);
 739
 740 DEF_DEV_ATTRIB(queue_depth);
 741 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 742
 743 DEF_DEV_ATTRIB(task_timeout);
 744 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
 745
 746 DEF_DEV_ATTRIB(max_unmap_lba_count);
 747 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 748
 749 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 750 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 751
 752 DEF_DEV_ATTRIB(unmap_granularity);
 753 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 754
 755 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 756 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 757
 758 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 759
 760 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 761         &target_core_dev_attrib_emulate_dpo.attr,
 762         &target_core_dev_attrib_emulate_fua_write.attr,
 763         &target_core_dev_attrib_emulate_fua_read.attr,
 764         &target_core_dev_attrib_emulate_write_cache.attr,
 765         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 766         &target_core_dev_attrib_emulate_tas.attr,
 767         &target_core_dev_attrib_emulate_tpu.attr,
 768         &target_core_dev_attrib_emulate_tpws.attr,
 769         &target_core_dev_attrib_enforce_pr_isids.attr,
 770         &target_core_dev_attrib_hw_block_size.attr,
 771         &target_core_dev_attrib_block_size.attr,
 772         &target_core_dev_attrib_hw_max_sectors.attr,
 773         &target_core_dev_attrib_max_sectors.attr,
 774         &target_core_dev_attrib_optimal_sectors.attr,
 775         &target_core_dev_attrib_hw_queue_depth.attr,
 776         &target_core_dev_attrib_queue_depth.attr,
 777         &target_core_dev_attrib_task_timeout.attr,
 778         &target_core_dev_attrib_max_unmap_lba_count.attr,
 779         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 780         &target_core_dev_attrib_unmap_granularity.attr,
 781         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 782         NULL,
 783 };
 784
 785 static struct configfs_item_operations target_core_dev_attrib_ops = {
 786         .show_attribute         = target_core_dev_attrib_attr_show,
 787         .store_attribute        = target_core_dev_attrib_attr_store,
 788 };
 789
 790 static struct config_item_type target_core_dev_attrib_cit = {
 791         .ct_item_ops            = &target_core_dev_attrib_ops,
 792         .ct_attrs               = target_core_dev_attrib_attrs,
 793         .ct_owner               = THIS_MODULE,
 794 };
 795
 796 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 797
 798 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 799
 800 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 801 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 802 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 803                 __CONFIGFS_EATTR(_name, _mode,                          \
 804                 target_core_dev_wwn_show_attr_##_name,                  \
 805                 target_core_dev_wwn_store_attr_##_name);
 806
 807 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 808 do {                                                                    \
 809         static struct target_core_dev_wwn_attribute                     \
 810                         target_core_dev_wwn_##_name =                   \
 811                 __CONFIGFS_EATTR_RO(_name,                              \
 812                 target_core_dev_wwn_show_attr_##_name);                 \
 813 } while (0);
 814
 815 /*
 816  * VPD page 0x80 Unit serial
 817  */
 818 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 819         struct t10_wwn *t10_wwn,
 820         char *page)
 821 {
 822         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 823         struct se_device *dev;
 824
 825         dev = se_dev->se_dev_ptr;
 826         if (!(dev))
 827                 return -ENODEV;
 828
 829         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 830                 &t10_wwn->unit_serial[0]);
 831 }
 832
 833 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 834         struct t10_wwn *t10_wwn,
 835         const char *page,
 836         size_t count)
 837 {
 838         struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
 839         struct se_device *dev;
 840         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 841
 842         /*
 843          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 844          * from the struct scsi_device level firmware, do not allow
 845          * VPD Unit Serial to be emulated.
 846          *
 847          * Note this struct scsi_device could also be emulating VPD
 848          * information from its drivers/scsi LLD.  But for now we assume
 849          * it is doing 'the right thing' wrt a world wide unique
 850          * VPD Unit Serial Number that OS dependent multipath can depend on.
 851          */
 852         if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
 853                 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
 854                         " Unit Serial, ignoring request\n");
 855                 return -EOPNOTSUPP;
 856         }
 857
 858         if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
 859                 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
 860                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 861                 return -EOVERFLOW;
 862         }
 863         /*
 864          * Check to see if any active $FABRIC_MOD exports exist.  If they
 865          * do exist, fail here as changing this information on the fly
 866          * (underneath the initiator side OS dependent multipath code)
 867          * could cause negative effects.
 868          */
 869         dev = su_dev->se_dev_ptr;
 870         if ((dev)) {
 871                 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
 872                         printk(KERN_ERR "Unable to set VPD Unit Serial while"
 873                                 " active %d $FABRIC_MOD exports exist\n",
 874                                 atomic_read(&dev->dev_export_obj.obj_access_count));
 875                         return -EINVAL;
 876                 }
 877         }
 878         /*
 879          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 880          *
 881          * Also, strip any newline added from the userspace
 882          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 883          */
 884         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 885         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 886         snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 887                         "%s", strstrip(buf));
 888         su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
 889
 890         printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 891                         " %s\n", su_dev->t10_wwn.unit_serial);
 892
 893         return count;
 894 }
 895
 896 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 897
 898 /*
 899  * VPD page 0x83 Protocol Identifier
 900  */
 901 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 902         struct t10_wwn *t10_wwn,
 903         char *page)
 904 {
 905         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 906         struct se_device *dev;
 907         struct t10_vpd *vpd;
 908         unsigned char buf[VPD_TMP_BUF_SIZE];
 909         ssize_t len = 0;
 910
 911         dev = se_dev->se_dev_ptr;
 912         if (!(dev))
 913                 return -ENODEV;
 914
 915         memset(buf, 0, VPD_TMP_BUF_SIZE);
 916
 917         spin_lock(&t10_wwn->t10_vpd_lock);
 918         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 919                 if (!(vpd->protocol_identifier_set))
 920                         continue;
 921
 922                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 923
 924                 if ((len + strlen(buf) > PAGE_SIZE))
 925                         break;
 926
 927                 len += sprintf(page+len, "%s", buf);
 928         }
 929         spin_unlock(&t10_wwn->t10_vpd_lock);
 930
 931         return len;
 932 }
 933
 934 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 935         struct t10_wwn *t10_wwn,
 936         const char *page,
 937         size_t count)
 938 {
 939         return -ENOSYS;
 940 }
 941
 942 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 943
 944 /*
 945  * Generic wrapper for dumping VPD identifiers by association.
 946  */
 947 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 948 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 949         struct t10_wwn *t10_wwn,                                        \
 950         char *page)                                                     \
 951 {                                                                       \
 952         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;         \
 953         struct se_device *dev;                                          \
 954         struct t10_vpd *vpd;                                                    \
 955         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 956         ssize_t len = 0;                                                \
 957                                                                         \
 958         dev = se_dev->se_dev_ptr;                                       \
 959         if (!(dev))                                                     \
 960                 return -ENODEV;                                         \
 961                                                                         \
 962         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 963         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 964                 if (vpd->association != _assoc)                         \
 965                         continue;                                       \
 966                                                                         \
 967                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 968                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 969                 if ((len + strlen(buf) > PAGE_SIZE))                    \
 970                         break;                                          \
 971                 len += sprintf(page+len, "%s", buf);                    \
 972                                                                         \
 973                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 974                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 975                 if ((len + strlen(buf) > PAGE_SIZE))                    \
 976                         break;                                          \
 977                 len += sprintf(page+len, "%s", buf);                    \
 978                                                                         \
 979                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 980                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 981                 if ((len + strlen(buf) > PAGE_SIZE))                    \
 982                         break;                                          \
 983                 len += sprintf(page+len, "%s", buf);                    \
 984         }                                                               \
 985         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 986                                                                         \
 987         return len;                                                     \
 988 }
 989
 990 /*
 991  * VPD page 0x83 Assoication: Logical Unit
 992  */
 993 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 994
 995 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 996         struct t10_wwn *t10_wwn,
 997         const char *page,
 998         size_t count)
 999 {
1000         return -ENOSYS;
1001 }
1002
1003 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1004
1005 /*
1006  * VPD page 0x83 Association: Target Port
1007  */
1008 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1009
1010 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1011         struct t10_wwn *t10_wwn,
1012         const char *page,
1013         size_t count)
1014 {
1015         return -ENOSYS;
1016 }
1017
1018 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1019
1020 /*
1021  * VPD page 0x83 Association: SCSI Target Device
1022  */
1023 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1024
1025 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1026         struct t10_wwn *t10_wwn,
1027         const char *page,
1028         size_t count)
1029 {
1030         return -ENOSYS;
1031 }
1032
1033 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1034
1035 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1036
1037 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1038         &target_core_dev_wwn_vpd_unit_serial.attr,
1039         &target_core_dev_wwn_vpd_protocol_identifier.attr,
1040         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1041         &target_core_dev_wwn_vpd_assoc_target_port.attr,
1042         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1043         NULL,
1044 };
1045
1046 static struct configfs_item_operations target_core_dev_wwn_ops = {
1047         .show_attribute         = target_core_dev_wwn_attr_show,
1048         .store_attribute        = target_core_dev_wwn_attr_store,
1049 };
1050
1051 static struct config_item_type target_core_dev_wwn_cit = {
1052         .ct_item_ops            = &target_core_dev_wwn_ops,
1053         .ct_attrs               = target_core_dev_wwn_attrs,
1054         .ct_owner               = THIS_MODULE,
1055 };
1056
1057 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1058
1059 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
1060
1061 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1062 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1063 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1064         __CONFIGFS_EATTR(_name, _mode,                                  \
1065         target_core_dev_pr_show_attr_##_name,                           \
1066         target_core_dev_pr_store_attr_##_name);
1067
1068 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1069 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1070         __CONFIGFS_EATTR_RO(_name,                                      \
1071         target_core_dev_pr_show_attr_##_name);
1072
1073 /*
1074  * res_holder
1075  */
1076 static ssize_t target_core_dev_pr_show_spc3_res(
1077         struct se_device *dev,
1078         char *page,
1079         ssize_t *len)
1080 {
1081         struct se_node_acl *se_nacl;
1082         struct t10_pr_registration *pr_reg;
1083         char i_buf[PR_REG_ISID_ID_LEN];
1084         int prf_isid;
1085
1086         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1087
1088         spin_lock(&dev->dev_reservation_lock);
1089         pr_reg = dev->dev_pr_res_holder;
1090         if (!(pr_reg)) {
1091                 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1092                 spin_unlock(&dev->dev_reservation_lock);
1093                 return *len;
1094         }
1095         se_nacl = pr_reg->pr_reg_nacl;
1096         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1097                                 PR_REG_ISID_ID_LEN);
1098
1099         *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1100                 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1101                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1102         spin_unlock(&dev->dev_reservation_lock);
1103
1104         return *len;
1105 }
1106
1107 static ssize_t target_core_dev_pr_show_spc2_res(
1108         struct se_device *dev,
1109         char *page,
1110         ssize_t *len)
1111 {
1112         struct se_node_acl *se_nacl;
1113
1114         spin_lock(&dev->dev_reservation_lock);
1115         se_nacl = dev->dev_reserved_node_acl;
1116         if (!(se_nacl)) {
1117                 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1118                 spin_unlock(&dev->dev_reservation_lock);
1119                 return *len;
1120         }
1121         *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1122                 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1123                 se_nacl->initiatorname);
1124         spin_unlock(&dev->dev_reservation_lock);
1125
1126         return *len;
1127 }
1128
1129 static ssize_t target_core_dev_pr_show_attr_res_holder(
1130         struct se_subsystem_dev *su_dev,
1131         char *page)
1132 {
1133         ssize_t len = 0;
1134
1135         if (!(su_dev->se_dev_ptr))
1136                 return -ENODEV;
1137
1138         switch (T10_RES(su_dev)->res_type) {
1139         case SPC3_PERSISTENT_RESERVATIONS:
1140                 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1141                                 page, &len);
1142                 break;
1143         case SPC2_RESERVATIONS:
1144                 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1145                                 page, &len);
1146                 break;
1147         case SPC_PASSTHROUGH:
1148                 len += sprintf(page+len, "Passthrough\n");
1149                 break;
1150         default:
1151                 len += sprintf(page+len, "Unknown\n");
1152                 break;
1153         }
1154
1155         return len;
1156 }
1157
1158 SE_DEV_PR_ATTR_RO(res_holder);
1159
1160 /*
1161  * res_pr_all_tgt_pts
1162  */
1163 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1164         struct se_subsystem_dev *su_dev,
1165         char *page)
1166 {
1167         struct se_device *dev;
1168         struct t10_pr_registration *pr_reg;
1169         ssize_t len = 0;
1170
1171         dev = su_dev->se_dev_ptr;
1172         if (!(dev))
1173                 return -ENODEV;
1174
1175         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1176                 return len;
1177
1178         spin_lock(&dev->dev_reservation_lock);
1179         pr_reg = dev->dev_pr_res_holder;
1180         if (!(pr_reg)) {
1181                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1182                 spin_unlock(&dev->dev_reservation_lock);
1183                 return len;
1184         }
1185         /*
1186          * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1187          * Basic PERSISTENT RESERVER OUT parameter list, page 290
1188          */
1189         if (pr_reg->pr_reg_all_tg_pt)
1190                 len = sprintf(page, "SPC-3 Reservation: All Target"
1191                         " Ports registration\n");
1192         else
1193                 len = sprintf(page, "SPC-3 Reservation: Single"
1194                         " Target Port registration\n");
1195         spin_unlock(&dev->dev_reservation_lock);
1196
1197         return len;
1198 }
1199
1200 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1201
1202 /*
1203  * res_pr_generation
1204  */
1205 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1206         struct se_subsystem_dev *su_dev,
1207         char *page)
1208 {
1209         if (!(su_dev->se_dev_ptr))
1210                 return -ENODEV;
1211
1212         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1213                 return 0;
1214
1215         return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
1216 }
1217
1218 SE_DEV_PR_ATTR_RO(res_pr_generation);
1219
1220 /*
1221  * res_pr_holder_tg_port
1222  */
1223 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1224         struct se_subsystem_dev *su_dev,
1225         char *page)
1226 {
1227         struct se_device *dev;
1228         struct se_node_acl *se_nacl;
1229         struct se_lun *lun;
1230         struct se_portal_group *se_tpg;
1231         struct t10_pr_registration *pr_reg;
1232         struct target_core_fabric_ops *tfo;
1233         ssize_t len = 0;
1234
1235         dev = su_dev->se_dev_ptr;
1236         if (!(dev))
1237                 return -ENODEV;
1238
1239         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1240                 return len;
1241
1242         spin_lock(&dev->dev_reservation_lock);
1243         pr_reg = dev->dev_pr_res_holder;
1244         if (!(pr_reg)) {
1245                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1246                 spin_unlock(&dev->dev_reservation_lock);
1247                 return len;
1248         }
1249         se_nacl = pr_reg->pr_reg_nacl;
1250         se_tpg = se_nacl->se_tpg;
1251         lun = pr_reg->pr_reg_tg_pt_lun;
1252         tfo = TPG_TFO(se_tpg);
1253
1254         len += sprintf(page+len, "SPC-3 Reservation: %s"
1255                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1256                 tfo->tpg_get_wwn(se_tpg));
1257         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1258                 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1259                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1260                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1261                 tfo->get_fabric_name(), lun->unpacked_lun);
1262         spin_unlock(&dev->dev_reservation_lock);
1263
1264         return len;
1265 }
1266
1267 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1268
1269 /*
1270  * res_pr_registered_i_pts
1271  */
1272 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1273         struct se_subsystem_dev *su_dev,
1274         char *page)
1275 {
1276         struct target_core_fabric_ops *tfo;
1277         struct t10_pr_registration *pr_reg;
1278         unsigned char buf[384];
1279         char i_buf[PR_REG_ISID_ID_LEN];
1280         ssize_t len = 0;
1281         int reg_count = 0, prf_isid;
1282
1283         if (!(su_dev->se_dev_ptr))
1284                 return -ENODEV;
1285
1286         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1287                 return len;
1288
1289         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1290
1291         spin_lock(&T10_RES(su_dev)->registration_lock);
1292         list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
1293                         pr_reg_list) {
1294
1295                 memset(buf, 0, 384);
1296                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1297                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1298                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1299                                         PR_REG_ISID_ID_LEN);
1300                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1301                         tfo->get_fabric_name(),
1302                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1303                         &i_buf[0] : "", pr_reg->pr_res_key,
1304                         pr_reg->pr_res_generation);
1305
1306                 if ((len + strlen(buf) > PAGE_SIZE))
1307                         break;
1308
1309                 len += sprintf(page+len, "%s", buf);
1310                 reg_count++;
1311         }
1312         spin_unlock(&T10_RES(su_dev)->registration_lock);
1313
1314         if (!(reg_count))
1315                 len += sprintf(page+len, "None\n");
1316
1317         return len;
1318 }
1319
1320 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1321
1322 /*
1323  * res_pr_type
1324  */
1325 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1326         struct se_subsystem_dev *su_dev,
1327         char *page)
1328 {
1329         struct se_device *dev;
1330         struct t10_pr_registration *pr_reg;
1331         ssize_t len = 0;
1332
1333         dev = su_dev->se_dev_ptr;
1334         if (!(dev))
1335                 return -ENODEV;
1336
1337         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1338                 return len;
1339
1340         spin_lock(&dev->dev_reservation_lock);
1341         pr_reg = dev->dev_pr_res_holder;
1342         if (!(pr_reg)) {
1343                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1344                 spin_unlock(&dev->dev_reservation_lock);
1345                 return len;
1346         }
1347         len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1348                 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1349         spin_unlock(&dev->dev_reservation_lock);
1350
1351         return len;
1352 }
1353
1354 SE_DEV_PR_ATTR_RO(res_pr_type);
1355
1356 /*
1357  * res_type
1358  */
1359 static ssize_t target_core_dev_pr_show_attr_res_type(
1360         struct se_subsystem_dev *su_dev,
1361         char *page)
1362 {
1363         ssize_t len = 0;
1364
1365         if (!(su_dev->se_dev_ptr))
1366                 return -ENODEV;
1367
1368         switch (T10_RES(su_dev)->res_type) {
1369         case SPC3_PERSISTENT_RESERVATIONS:
1370                 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1371                 break;
1372         case SPC2_RESERVATIONS:
1373                 len = sprintf(page, "SPC2_RESERVATIONS\n");
1374                 break;
1375         case SPC_PASSTHROUGH:
1376                 len = sprintf(page, "SPC_PASSTHROUGH\n");
1377                 break;
1378         default:
1379                 len = sprintf(page, "UNKNOWN\n");
1380                 break;
1381         }
1382
1383         return len;
1384 }
1385
1386 SE_DEV_PR_ATTR_RO(res_type);
1387
1388 /*
1389  * res_aptpl_active
1390  */
1391
1392 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1393         struct se_subsystem_dev *su_dev,
1394         char *page)
1395 {
1396         if (!(su_dev->se_dev_ptr))
1397                 return -ENODEV;
1398
1399         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1400                 return 0;
1401
1402         return sprintf(page, "APTPL Bit Status: %s\n",
1403                 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
1404 }
1405
1406 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1407
1408 /*
1409  * res_aptpl_metadata
1410  */
1411 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1412         struct se_subsystem_dev *su_dev,
1413         char *page)
1414 {
1415         if (!(su_dev->se_dev_ptr))
1416                 return -ENODEV;
1417
1418         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1419                 return 0;
1420
1421         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1422 }
1423
1424 enum {
1425         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1426         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1427         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1428         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1429 };
1430
1431 static match_table_t tokens = {
1432         {Opt_initiator_fabric, "initiator_fabric=%s"},
1433         {Opt_initiator_node, "initiator_node=%s"},
1434         {Opt_initiator_sid, "initiator_sid=%s"},
1435         {Opt_sa_res_key, "sa_res_key=%s"},
1436         {Opt_res_holder, "res_holder=%d"},
1437         {Opt_res_type, "res_type=%d"},
1438         {Opt_res_scope, "res_scope=%d"},
1439         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1440         {Opt_mapped_lun, "mapped_lun=%d"},
1441         {Opt_target_fabric, "target_fabric=%s"},
1442         {Opt_target_node, "target_node=%s"},
1443         {Opt_tpgt, "tpgt=%d"},
1444         {Opt_port_rtpi, "port_rtpi=%d"},
1445         {Opt_target_lun, "target_lun=%d"},
1446         {Opt_err, NULL}
1447 };
1448
1449 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1450         struct se_subsystem_dev *su_dev,
1451         const char *page,
1452         size_t count)
1453 {
1454         struct se_device *dev;
1455         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1456         unsigned char *t_fabric = NULL, *t_port = NULL;
1457         char *orig, *ptr, *arg_p, *opts;
1458         substring_t args[MAX_OPT_ARGS];
1459         unsigned long long tmp_ll;
1460         u64 sa_res_key = 0;
1461         u32 mapped_lun = 0, target_lun = 0;
1462         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1463         u16 port_rpti = 0, tpgt = 0;
1464         u8 type = 0, scope;
1465
1466         dev = su_dev->se_dev_ptr;
1467         if (!(dev))
1468                 return -ENODEV;
1469
1470         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1471                 return 0;
1472
1473         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1474                 printk(KERN_INFO "Unable to process APTPL metadata while"
1475                         " active fabric exports exist\n");
1476                 return -EINVAL;
1477         }
1478
1479         opts = kstrdup(page, GFP_KERNEL);
1480         if (!opts)
1481                 return -ENOMEM;
1482
1483         orig = opts;
1484         while ((ptr = strsep(&opts, ",")) != NULL) {
1485                 if (!*ptr)
1486                         continue;
1487
1488                 token = match_token(ptr, tokens, args);
1489                 switch (token) {
1490                 case Opt_initiator_fabric:
1491                         i_fabric = match_strdup(&args[0]);
1492                         if (!i_fabric) {
1493                                 ret = -ENOMEM;
1494                                 goto out;
1495                         }
1496                         break;
1497                 case Opt_initiator_node:
1498                         i_port = match_strdup(&args[0]);
1499                         if (!i_port) {
1500                                 ret = -ENOMEM;
1501                                 goto out;
1502                         }
1503                         if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) {
1504                                 printk(KERN_ERR "APTPL metadata initiator_node="
1505                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1506                                         PR_APTPL_MAX_IPORT_LEN);
1507                                 ret = -EINVAL;
1508                                 break;
1509                         }
1510                         break;
1511                 case Opt_initiator_sid:
1512                         isid = match_strdup(&args[0]);
1513                         if (!isid) {
1514                                 ret = -ENOMEM;
1515                                 goto out;
1516                         }
1517                         if (strlen(isid) > PR_REG_ISID_LEN) {
1518                                 printk(KERN_ERR "APTPL metadata initiator_isid"
1519                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1520                                         PR_REG_ISID_LEN);
1521                                 ret = -EINVAL;
1522                                 break;
1523                         }
1524                         break;
1525                 case Opt_sa_res_key:
1526                         arg_p = match_strdup(&args[0]);
1527                         if (!arg_p) {
1528                                 ret = -ENOMEM;
1529                                 goto out;
1530                         }
1531                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1532                         if (ret < 0) {
1533                                 printk(KERN_ERR "strict_strtoull() failed for"
1534                                         " sa_res_key=\n");
1535                                 goto out;
1536                         }
1537                         sa_res_key = (u64)tmp_ll;
1538                         break;
1539                 /*
1540                  * PR APTPL Metadata for Reservation
1541                  */
1542                 case Opt_res_holder:
1543                         match_int(args, &arg);
1544                         res_holder = arg;
1545                         break;
1546                 case Opt_res_type:
1547                         match_int(args, &arg);
1548                         type = (u8)arg;
1549                         break;
1550                 case Opt_res_scope:
1551                         match_int(args, &arg);
1552                         scope = (u8)arg;
1553                         break;
1554                 case Opt_res_all_tg_pt:
1555                         match_int(args, &arg);
1556                         all_tg_pt = (int)arg;
1557                         break;
1558                 case Opt_mapped_lun:
1559                         match_int(args, &arg);
1560                         mapped_lun = (u32)arg;
1561                         break;
1562                 /*
1563                  * PR APTPL Metadata for Target Port
1564                  */
1565                 case Opt_target_fabric:
1566                         t_fabric = match_strdup(&args[0]);
1567                         if (!t_fabric) {
1568                                 ret = -ENOMEM;
1569                                 goto out;
1570                         }
1571                         break;
1572                 case Opt_target_node:
1573                         t_port = match_strdup(&args[0]);
1574                         if (!t_port) {
1575                                 ret = -ENOMEM;
1576                                 goto out;
1577                         }
1578                         if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) {
1579                                 printk(KERN_ERR "APTPL metadata target_node="
1580                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1581                                         PR_APTPL_MAX_TPORT_LEN);
1582                                 ret = -EINVAL;
1583                                 break;
1584                         }
1585                         break;
1586                 case Opt_tpgt:
1587                         match_int(args, &arg);
1588                         tpgt = (u16)arg;
1589                         break;
1590                 case Opt_port_rtpi:
1591                         match_int(args, &arg);
1592                         port_rpti = (u16)arg;
1593                         break;
1594                 case Opt_target_lun:
1595                         match_int(args, &arg);
1596                         target_lun = (u32)arg;
1597                         break;
1598                 default:
1599                         break;
1600                 }
1601         }
1602
1603         if (!(i_port) || !(t_port) || !(sa_res_key)) {
1604                 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1605                 ret = -EINVAL;
1606                 goto out;
1607         }
1608
1609         if (res_holder && !(type)) {
1610                 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1611                                 " holder\n", type);
1612                 ret = -EINVAL;
1613                 goto out;
1614         }
1615
1616         ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
1617                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1618                         res_holder, all_tg_pt, type);
1619 out:
1620         kfree(i_fabric);
1621         kfree(i_port);
1622         kfree(isid);
1623         kfree(t_fabric);
1624         kfree(t_port);
1625         kfree(orig);
1626         return (ret == 0) ? count : ret;
1627 }
1628
1629 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1630
1631 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1632
1633 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1634         &target_core_dev_pr_res_holder.attr,
1635         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1636         &target_core_dev_pr_res_pr_generation.attr,
1637         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1638         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1639         &target_core_dev_pr_res_pr_type.attr,
1640         &target_core_dev_pr_res_type.attr,
1641         &target_core_dev_pr_res_aptpl_active.attr,
1642         &target_core_dev_pr_res_aptpl_metadata.attr,
1643         NULL,
1644 };
1645
1646 static struct configfs_item_operations target_core_dev_pr_ops = {
1647         .show_attribute         = target_core_dev_pr_attr_show,
1648         .store_attribute        = target_core_dev_pr_attr_store,
1649 };
1650
1651 static struct config_item_type target_core_dev_pr_cit = {
1652         .ct_item_ops            = &target_core_dev_pr_ops,
1653         .ct_attrs               = target_core_dev_pr_attrs,
1654         .ct_owner               = THIS_MODULE,
1655 };
1656
1657 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1658
1659 /*  Start functions for struct config_item_type target_core_dev_cit */
1660
1661 static ssize_t target_core_show_dev_info(void *p, char *page)
1662 {
1663         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1664         struct se_hba *hba = se_dev->se_dev_hba;
1665         struct se_subsystem_api *t = hba->transport;
1666         int bl = 0;
1667         ssize_t read_bytes = 0;
1668
1669         if (!(se_dev->se_dev_ptr))
1670                 return -ENODEV;
1671
1672         transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1673         read_bytes += bl;
1674         read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1675         return read_bytes;
1676 }
1677
1678 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1679         .attr   = { .ca_owner = THIS_MODULE,
1680                     .ca_name = "info",
1681                     .ca_mode = S_IRUGO },
1682         .show   = target_core_show_dev_info,
1683         .store  = NULL,
1684 };
1685
1686 static ssize_t target_core_store_dev_control(
1687         void *p,
1688         const char *page,
1689         size_t count)
1690 {
1691         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1692         struct se_hba *hba = se_dev->se_dev_hba;
1693         struct se_subsystem_api *t = hba->transport;
1694
1695         if (!(se_dev->se_dev_su_ptr)) {
1696                 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1697                                 "_dev_su_ptr\n");
1698                 return -EINVAL;
1699         }
1700
1701         return t->set_configfs_dev_params(hba, se_dev, page, count);
1702 }
1703
1704 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1705         .attr   = { .ca_owner = THIS_MODULE,
1706                     .ca_name = "control",
1707                     .ca_mode = S_IWUSR },
1708         .show   = NULL,
1709         .store  = target_core_store_dev_control,
1710 };
1711
1712 static ssize_t target_core_show_dev_alias(void *p, char *page)
1713 {
1714         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1715
1716         if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1717                 return 0;
1718
1719         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1720 }
1721
1722 static ssize_t target_core_store_dev_alias(
1723         void *p,
1724         const char *page,
1725         size_t count)
1726 {
1727         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1728         struct se_hba *hba = se_dev->se_dev_hba;
1729         ssize_t read_bytes;
1730
1731         if (count > (SE_DEV_ALIAS_LEN-1)) {
1732                 printk(KERN_ERR "alias count: %d exceeds"
1733                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1734                         SE_DEV_ALIAS_LEN-1);
1735                 return -EINVAL;
1736         }
1737
1738         se_dev->su_dev_flags |= SDF_USING_ALIAS;
1739         read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1740                         "%s", page);
1741
1742         printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1743                 config_item_name(&hba->hba_group.cg_item),
1744                 config_item_name(&se_dev->se_dev_group.cg_item),
1745                 se_dev->se_dev_alias);
1746
1747         return read_bytes;
1748 }
1749
1750 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1751         .attr   = { .ca_owner = THIS_MODULE,
1752                     .ca_name = "alias",
1753                     .ca_mode =  S_IRUGO | S_IWUSR },
1754         .show   = target_core_show_dev_alias,
1755         .store  = target_core_store_dev_alias,
1756 };
1757
1758 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1759 {
1760         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1761
1762         if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1763                 return 0;
1764
1765         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1766 }
1767
1768 static ssize_t target_core_store_dev_udev_path(
1769         void *p,
1770         const char *page,
1771         size_t count)
1772 {
1773         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1774         struct se_hba *hba = se_dev->se_dev_hba;
1775         ssize_t read_bytes;
1776
1777         if (count > (SE_UDEV_PATH_LEN-1)) {
1778                 printk(KERN_ERR "udev_path count: %d exceeds"
1779                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1780                         SE_UDEV_PATH_LEN-1);
1781                 return -EINVAL;
1782         }
1783
1784         se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1785         read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1786                         "%s", page);
1787
1788         printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1789                 config_item_name(&hba->hba_group.cg_item),
1790                 config_item_name(&se_dev->se_dev_group.cg_item),
1791                 se_dev->se_dev_udev_path);
1792
1793         return read_bytes;
1794 }
1795
1796 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1797         .attr   = { .ca_owner = THIS_MODULE,
1798                     .ca_name = "udev_path",
1799                     .ca_mode =  S_IRUGO | S_IWUSR },
1800         .show   = target_core_show_dev_udev_path,
1801         .store  = target_core_store_dev_udev_path,
1802 };
1803
1804 static ssize_t target_core_store_dev_enable(
1805         void *p,
1806         const char *page,
1807         size_t count)
1808 {
1809         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1810         struct se_device *dev;
1811         struct se_hba *hba = se_dev->se_dev_hba;
1812         struct se_subsystem_api *t = hba->transport;
1813         char *ptr;
1814
1815         ptr = strstr(page, "1");
1816         if (!(ptr)) {
1817                 printk(KERN_ERR "For dev_enable ops, only valid value"
1818                                 " is \"1\"\n");
1819                 return -EINVAL;
1820         }
1821         if ((se_dev->se_dev_ptr)) {
1822                 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1823                                 " object\n");
1824                 return -EEXIST;
1825         }
1826
1827         if (t->check_configfs_dev_params(hba, se_dev) < 0)
1828                 return -EINVAL;
1829
1830         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1831         if (IS_ERR(dev))
1832                 return PTR_ERR(dev);
1833         else if (!dev)
1834                 return -EINVAL;
1835
1836         se_dev->se_dev_ptr = dev;
1837         printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1838                 " %p\n", se_dev->se_dev_ptr);
1839
1840         return count;
1841 }
1842
1843 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1844         .attr   = { .ca_owner = THIS_MODULE,
1845                     .ca_name = "enable",
1846                     .ca_mode = S_IWUSR },
1847         .show   = NULL,
1848         .store  = target_core_store_dev_enable,
1849 };
1850
1851 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1852 {
1853         struct se_device *dev;
1854         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1855         struct config_item *lu_ci;
1856         struct t10_alua_lu_gp *lu_gp;
1857         struct t10_alua_lu_gp_member *lu_gp_mem;
1858         ssize_t len = 0;
1859
1860         dev = su_dev->se_dev_ptr;
1861         if (!(dev))
1862                 return -ENODEV;
1863
1864         if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
1865                 return len;
1866
1867         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1868         if (!(lu_gp_mem)) {
1869                 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1870                                 " pointer\n");
1871                 return -EINVAL;
1872         }
1873
1874         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1875         lu_gp = lu_gp_mem->lu_gp;
1876         if ((lu_gp)) {
1877                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1878                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1879                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1880         }
1881         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1882
1883         return len;
1884 }
1885
1886 static ssize_t target_core_store_alua_lu_gp(
1887         void *p,
1888         const char *page,
1889         size_t count)
1890 {
1891         struct se_device *dev;
1892         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1893         struct se_hba *hba = su_dev->se_dev_hba;
1894         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1895         struct t10_alua_lu_gp_member *lu_gp_mem;
1896         unsigned char buf[LU_GROUP_NAME_BUF];
1897         int move = 0;
1898
1899         dev = su_dev->se_dev_ptr;
1900         if (!(dev))
1901                 return -ENODEV;
1902
1903         if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
1904                 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1905                         config_item_name(&hba->hba_group.cg_item),
1906                         config_item_name(&su_dev->se_dev_group.cg_item));
1907                 return -EINVAL;
1908         }
1909         if (count > LU_GROUP_NAME_BUF) {
1910                 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1911                 return -EINVAL;
1912         }
1913         memset(buf, 0, LU_GROUP_NAME_BUF);
1914         memcpy(buf, page, count);
1915         /*
1916          * Any ALUA logical unit alias besides "NULL" means we will be
1917          * making a new group association.
1918          */
1919         if (strcmp(strstrip(buf), "NULL")) {
1920                 /*
1921                  * core_alua_get_lu_gp_by_name() will increment reference to
1922                  * struct t10_alua_lu_gp.  This reference is released with
1923                  * core_alua_get_lu_gp_by_name below().
1924                  */
1925                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1926                 if (!(lu_gp_new))
1927                         return -ENODEV;
1928         }
1929         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1930         if (!(lu_gp_mem)) {
1931                 if (lu_gp_new)
1932                         core_alua_put_lu_gp_from_name(lu_gp_new);
1933                 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1934                                 " pointer\n");
1935                 return -EINVAL;
1936         }
1937
1938         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1939         lu_gp = lu_gp_mem->lu_gp;
1940         if ((lu_gp)) {
1941                 /*
1942                  * Clearing an existing lu_gp association, and replacing
1943                  * with NULL
1944                  */
1945                 if (!(lu_gp_new)) {
1946                         printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1947                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1948                                 " %hu\n",
1949                                 config_item_name(&hba->hba_group.cg_item),
1950                                 config_item_name(&su_dev->se_dev_group.cg_item),
1951                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1952                                 lu_gp->lu_gp_id);
1953
1954                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1955                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1956
1957                         return count;
1958                 }
1959                 /*
1960                  * Removing existing association of lu_gp_mem with lu_gp
1961                  */
1962                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1963                 move = 1;
1964         }
1965         /*
1966          * Associate lu_gp_mem with lu_gp_new.
1967          */
1968         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1969         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1970
1971         printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1972                 " core/alua/lu_gps/%s, ID: %hu\n",
1973                 (move) ? "Moving" : "Adding",
1974                 config_item_name(&hba->hba_group.cg_item),
1975                 config_item_name(&su_dev->se_dev_group.cg_item),
1976                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1977                 lu_gp_new->lu_gp_id);
1978
1979         core_alua_put_lu_gp_from_name(lu_gp_new);
1980         return count;
1981 }
1982
1983 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1984         .attr   = { .ca_owner = THIS_MODULE,
1985                     .ca_name = "alua_lu_gp",
1986                     .ca_mode = S_IRUGO | S_IWUSR },
1987         .show   = target_core_show_alua_lu_gp,
1988         .store  = target_core_store_alua_lu_gp,
1989 };
1990
1991 static struct configfs_attribute *lio_core_dev_attrs[] = {
1992         &target_core_attr_dev_info.attr,
1993         &target_core_attr_dev_control.attr,
1994         &target_core_attr_dev_alias.attr,
1995         &target_core_attr_dev_udev_path.attr,
1996         &target_core_attr_dev_enable.attr,
1997         &target_core_attr_dev_alua_lu_gp.attr,
1998         NULL,
1999 };
2000
2001 static void target_core_dev_release(struct config_item *item)
2002 {
2003         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2004                                 struct se_subsystem_dev, se_dev_group);
2005         struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2006         struct se_subsystem_api *t = hba->transport;
2007         struct config_group *dev_cg = &se_dev->se_dev_group;
2008
2009         kfree(dev_cg->default_groups);
2010         /*
2011          * This pointer will set when the storage is enabled with:
2012          *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2013          */
2014         if (se_dev->se_dev_ptr) {
2015                 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
2016                         "virtual_device() for se_dev_ptr: %p\n",
2017                         se_dev->se_dev_ptr);
2018
2019                 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2020         } else {
2021                 /*
2022                  * Release struct se_subsystem_dev->se_dev_su_ptr..
2023                  */
2024                 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
2025                         "device() for se_dev_su_ptr: %p\n",
2026                         se_dev->se_dev_su_ptr);
2027
2028                 t->free_device(se_dev->se_dev_su_ptr);
2029         }
2030
2031         printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2032                         "_dev_t: %p\n", se_dev);
2033         kfree(se_dev);
2034 }
2035
2036 static ssize_t target_core_dev_show(struct config_item *item,
2037                                      struct configfs_attribute *attr,
2038                                      char *page)
2039 {
2040         struct se_subsystem_dev *se_dev = container_of(
2041                         to_config_group(item), struct se_subsystem_dev,
2042                         se_dev_group);
2043         struct target_core_configfs_attribute *tc_attr = container_of(
2044                         attr, struct target_core_configfs_attribute, attr);
2045
2046         if (!(tc_attr->show))
2047                 return -EINVAL;
2048
2049         return tc_attr->show((void *)se_dev, page);
2050 }
2051
2052 static ssize_t target_core_dev_store(struct config_item *item,
2053                                       struct configfs_attribute *attr,
2054                                       const char *page, size_t count)
2055 {
2056         struct se_subsystem_dev *se_dev = container_of(
2057                         to_config_group(item), struct se_subsystem_dev,
2058                         se_dev_group);
2059         struct target_core_configfs_attribute *tc_attr = container_of(
2060                         attr, struct target_core_configfs_attribute, attr);
2061
2062         if (!(tc_attr->store))
2063                 return -EINVAL;
2064
2065         return tc_attr->store((void *)se_dev, page, count);
2066 }
2067
2068 static struct configfs_item_operations target_core_dev_item_ops = {
2069         .release                = target_core_dev_release,
2070         .show_attribute         = target_core_dev_show,
2071         .store_attribute        = target_core_dev_store,
2072 };
2073
2074 static struct config_item_type target_core_dev_cit = {
2075         .ct_item_ops            = &target_core_dev_item_ops,
2076         .ct_attrs               = lio_core_dev_attrs,
2077         .ct_owner               = THIS_MODULE,
2078 };
2079
2080 /* End functions for struct config_item_type target_core_dev_cit */
2081
2082 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2083
2084 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2085 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2086 static struct target_core_alua_lu_gp_attribute                          \
2087                         target_core_alua_lu_gp_##_name =                \
2088         __CONFIGFS_EATTR(_name, _mode,                                  \
2089         target_core_alua_lu_gp_show_attr_##_name,                       \
2090         target_core_alua_lu_gp_store_attr_##_name);
2091
2092 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2093 static struct target_core_alua_lu_gp_attribute                          \
2094                         target_core_alua_lu_gp_##_name =                \
2095         __CONFIGFS_EATTR_RO(_name,                                      \
2096         target_core_alua_lu_gp_show_attr_##_name);
2097
2098 /*
2099  * lu_gp_id
2100  */
2101 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2102         struct t10_alua_lu_gp *lu_gp,
2103         char *page)
2104 {
2105         if (!(lu_gp->lu_gp_valid_id))
2106                 return 0;
2107
2108         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2109 }
2110
2111 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2112         struct t10_alua_lu_gp *lu_gp,
2113         const char *page,
2114         size_t count)
2115 {
2116         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2117         unsigned long lu_gp_id;
2118         int ret;
2119
2120         ret = strict_strtoul(page, 0, &lu_gp_id);
2121         if (ret < 0) {
2122                 printk(KERN_ERR "strict_strtoul() returned %d for"
2123                         " lu_gp_id\n", ret);
2124                 return -EINVAL;
2125         }
2126         if (lu_gp_id > 0x0000ffff) {
2127                 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2128                         " 0x0000ffff\n", lu_gp_id);
2129                 return -EINVAL;
2130         }
2131
2132         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2133         if (ret < 0)
2134                 return -EINVAL;
2135
2136         printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2137                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2138                 config_item_name(&alua_lu_gp_cg->cg_item),
2139                 lu_gp->lu_gp_id);
2140
2141         return count;
2142 }
2143
2144 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2145
2146 /*
2147  * members
2148  */
2149 static ssize_t target_core_alua_lu_gp_show_attr_members(
2150         struct t10_alua_lu_gp *lu_gp,
2151         char *page)
2152 {
2153         struct se_device *dev;
2154         struct se_hba *hba;
2155         struct se_subsystem_dev *su_dev;
2156         struct t10_alua_lu_gp_member *lu_gp_mem;
2157         ssize_t len = 0, cur_len;
2158         unsigned char buf[LU_GROUP_NAME_BUF];
2159
2160         memset(buf, 0, LU_GROUP_NAME_BUF);
2161
2162         spin_lock(&lu_gp->lu_gp_lock);
2163         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2164                 dev = lu_gp_mem->lu_gp_mem_dev;
2165                 su_dev = dev->se_sub_dev;
2166                 hba = su_dev->se_dev_hba;
2167
2168                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2169                         config_item_name(&hba->hba_group.cg_item),
2170                         config_item_name(&su_dev->se_dev_group.cg_item));
2171                 cur_len++; /* Extra byte for NULL terminator */
2172
2173                 if ((cur_len + len) > PAGE_SIZE) {
2174                         printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2175                                 "_members buffer\n");
2176                         break;
2177                 }
2178                 memcpy(page+len, buf, cur_len);
2179                 len += cur_len;
2180         }
2181         spin_unlock(&lu_gp->lu_gp_lock);
2182
2183         return len;
2184 }
2185
2186 SE_DEV_ALUA_LU_ATTR_RO(members);
2187
2188 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2189
2190 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2191         &target_core_alua_lu_gp_lu_gp_id.attr,
2192         &target_core_alua_lu_gp_members.attr,
2193         NULL,
2194 };
2195
2196 static void target_core_alua_lu_gp_release(struct config_item *item)
2197 {
2198         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2199                         struct t10_alua_lu_gp, lu_gp_group);
2200
2201         core_alua_free_lu_gp(lu_gp);
2202 }
2203
2204 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2205         .release                = target_core_alua_lu_gp_release,
2206         .show_attribute         = target_core_alua_lu_gp_attr_show,
2207         .store_attribute        = target_core_alua_lu_gp_attr_store,
2208 };
2209
2210 static struct config_item_type target_core_alua_lu_gp_cit = {
2211         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2212         .ct_attrs               = target_core_alua_lu_gp_attrs,
2213         .ct_owner               = THIS_MODULE,
2214 };
2215
2216 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2217
2218 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2219
2220 static struct config_group *target_core_alua_create_lu_gp(
2221         struct config_group *group,
2222         const char *name)
2223 {
2224         struct t10_alua_lu_gp *lu_gp;
2225         struct config_group *alua_lu_gp_cg = NULL;
2226         struct config_item *alua_lu_gp_ci = NULL;
2227
2228         lu_gp = core_alua_allocate_lu_gp(name, 0);
2229         if (IS_ERR(lu_gp))
2230                 return NULL;
2231
2232         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2233         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2234
2235         config_group_init_type_name(alua_lu_gp_cg, name,
2236                         &target_core_alua_lu_gp_cit);
2237
2238         printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2239                 " Group: core/alua/lu_gps/%s\n",
2240                 config_item_name(alua_lu_gp_ci));
2241
2242         return alua_lu_gp_cg;
2243
2244 }
2245
2246 static void target_core_alua_drop_lu_gp(
2247         struct config_group *group,
2248         struct config_item *item)
2249 {
2250         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2251                         struct t10_alua_lu_gp, lu_gp_group);
2252
2253         printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2254                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2255                 config_item_name(item), lu_gp->lu_gp_id);
2256         /*
2257          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2258          * -> target_core_alua_lu_gp_release()
2259          */
2260         config_item_put(item);
2261 }
2262
2263 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2264         .make_group             = &target_core_alua_create_lu_gp,
2265         .drop_item              = &target_core_alua_drop_lu_gp,
2266 };
2267
2268 static struct config_item_type target_core_alua_lu_gps_cit = {
2269         .ct_item_ops            = NULL,
2270         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2271         .ct_owner               = THIS_MODULE,
2272 };
2273
2274 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2275
2276 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2277
2278 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2279 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2280 static struct target_core_alua_tg_pt_gp_attribute                       \
2281                         target_core_alua_tg_pt_gp_##_name =             \
2282         __CONFIGFS_EATTR(_name, _mode,                                  \
2283         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2284         target_core_alua_tg_pt_gp_store_attr_##_name);
2285
2286 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2287 static struct target_core_alua_tg_pt_gp_attribute                       \
2288                         target_core_alua_tg_pt_gp_##_name =             \
2289         __CONFIGFS_EATTR_RO(_name,                                      \
2290         target_core_alua_tg_pt_gp_show_attr_##_name);
2291
2292 /*
2293  * alua_access_state
2294  */
2295 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2296         struct t10_alua_tg_pt_gp *tg_pt_gp,
2297         char *page)
2298 {
2299         return sprintf(page, "%d\n",
2300                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2301 }
2302
2303 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2304         struct t10_alua_tg_pt_gp *tg_pt_gp,
2305         const char *page,
2306         size_t count)
2307 {
2308         struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2309         unsigned long tmp;
2310         int new_state, ret;
2311
2312         if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2313                 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2314                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2315                 return -EINVAL;
2316         }
2317
2318         ret = strict_strtoul(page, 0, &tmp);
2319         if (ret < 0) {
2320                 printk("Unable to extract new ALUA access state from"
2321                                 " %s\n", page);
2322                 return -EINVAL;
2323         }
2324         new_state = (int)tmp;
2325
2326         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2327                 printk(KERN_ERR "Unable to process implict configfs ALUA"
2328                         " transition while TPGS_IMPLICT_ALUA is diabled\n");
2329                 return -EINVAL;
2330         }
2331
2332         ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2333                                         NULL, NULL, new_state, 0);
2334         return (!ret) ? count : -EINVAL;
2335 }
2336
2337 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2338
2339 /*
2340  * alua_access_status
2341  */
2342 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2343         struct t10_alua_tg_pt_gp *tg_pt_gp,
2344         char *page)
2345 {
2346         return sprintf(page, "%s\n",
2347                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2348 }
2349
2350 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2351         struct t10_alua_tg_pt_gp *tg_pt_gp,
2352         const char *page,
2353         size_t count)
2354 {
2355         unsigned long tmp;
2356         int new_status, ret;
2357
2358         if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2359                 printk(KERN_ERR "Unable to do set ALUA access status on non"
2360                         " valid tg_pt_gp ID: %hu\n",
2361                         tg_pt_gp->tg_pt_gp_valid_id);
2362                 return -EINVAL;
2363         }
2364
2365         ret = strict_strtoul(page, 0, &tmp);
2366         if (ret < 0) {
2367                 printk(KERN_ERR "Unable to extract new ALUA access status"
2368                                 " from %s\n", page);
2369                 return -EINVAL;
2370         }
2371         new_status = (int)tmp;
2372
2373         if ((new_status != ALUA_STATUS_NONE) &&
2374             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2375             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2376                 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2377                                 new_status);
2378                 return -EINVAL;
2379         }
2380
2381         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2382         return count;
2383 }
2384
2385 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2386
2387 /*
2388  * alua_access_type
2389  */
2390 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2391         struct t10_alua_tg_pt_gp *tg_pt_gp,
2392         char *page)
2393 {
2394         return core_alua_show_access_type(tg_pt_gp, page);
2395 }
2396
2397 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2398         struct t10_alua_tg_pt_gp *tg_pt_gp,
2399         const char *page,
2400         size_t count)
2401 {
2402         return core_alua_store_access_type(tg_pt_gp, page, count);
2403 }
2404
2405 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2406
2407 /*
2408  * alua_write_metadata
2409  */
2410 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2411         struct t10_alua_tg_pt_gp *tg_pt_gp,
2412         char *page)
2413 {
2414         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2415 }
2416
2417 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2418         struct t10_alua_tg_pt_gp *tg_pt_gp,
2419         const char *page,
2420         size_t count)
2421 {
2422         unsigned long tmp;
2423         int ret;
2424
2425         ret = strict_strtoul(page, 0, &tmp);
2426         if (ret < 0) {
2427                 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2428                 return -EINVAL;
2429         }
2430
2431         if ((tmp != 0) && (tmp != 1)) {
2432                 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2433                         " %lu\n", tmp);
2434                 return -EINVAL;
2435         }
2436         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2437
2438         return count;
2439 }
2440
2441 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2442
2443
2444
2445 /*
2446  * nonop_delay_msecs
2447  */
2448 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2449         struct t10_alua_tg_pt_gp *tg_pt_gp,
2450         char *page)
2451 {
2452         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2453
2454 }
2455
2456 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2457         struct t10_alua_tg_pt_gp *tg_pt_gp,
2458         const char *page,
2459         size_t count)
2460 {
2461         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2462 }
2463
2464 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2465
2466 /*
2467  * trans_delay_msecs
2468  */
2469 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2470         struct t10_alua_tg_pt_gp *tg_pt_gp,
2471         char *page)
2472 {
2473         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2474 }
2475
2476 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2477         struct t10_alua_tg_pt_gp *tg_pt_gp,
2478         const char *page,
2479         size_t count)
2480 {
2481         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2482 }
2483
2484 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2485
2486 /*
2487  * preferred
2488  */
2489
2490 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2491         struct t10_alua_tg_pt_gp *tg_pt_gp,
2492         char *page)
2493 {
2494         return core_alua_show_preferred_bit(tg_pt_gp, page);
2495 }
2496
2497 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2498         struct t10_alua_tg_pt_gp *tg_pt_gp,
2499         const char *page,
2500         size_t count)
2501 {
2502         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2503 }
2504
2505 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2506
2507 /*
2508  * tg_pt_gp_id
2509  */
2510 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2511         struct t10_alua_tg_pt_gp *tg_pt_gp,
2512         char *page)
2513 {
2514         if (!(tg_pt_gp->tg_pt_gp_valid_id))
2515                 return 0;
2516
2517         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2518 }
2519
2520 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2521         struct t10_alua_tg_pt_gp *tg_pt_gp,
2522         const char *page,
2523         size_t count)
2524 {
2525         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2526         unsigned long tg_pt_gp_id;
2527         int ret;
2528
2529         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2530         if (ret < 0) {
2531                 printk(KERN_ERR "strict_strtoul() returned %d for"
2532                         " tg_pt_gp_id\n", ret);
2533                 return -EINVAL;
2534         }
2535         if (tg_pt_gp_id > 0x0000ffff) {
2536                 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2537                         " 0x0000ffff\n", tg_pt_gp_id);
2538                 return -EINVAL;
2539         }
2540
2541         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2542         if (ret < 0)
2543                 return -EINVAL;
2544
2545         printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2546                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2547                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2548                 tg_pt_gp->tg_pt_gp_id);
2549
2550         return count;
2551 }
2552
2553 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2554
2555 /*
2556  * members
2557  */
2558 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2559         struct t10_alua_tg_pt_gp *tg_pt_gp,
2560         char *page)
2561 {
2562         struct se_port *port;
2563         struct se_portal_group *tpg;
2564         struct se_lun *lun;
2565         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2566         ssize_t len = 0, cur_len;
2567         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2568
2569         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2570
2571         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2572         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2573                         tg_pt_gp_mem_list) {
2574                 port = tg_pt_gp_mem->tg_pt;
2575                 tpg = port->sep_tpg;
2576                 lun = port->sep_lun;
2577
2578                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2579                         "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
2580                         TPG_TFO(tpg)->tpg_get_wwn(tpg),
2581                         TPG_TFO(tpg)->tpg_get_tag(tpg),
2582                         config_item_name(&lun->lun_group.cg_item));
2583                 cur_len++; /* Extra byte for NULL terminator */
2584
2585                 if ((cur_len + len) > PAGE_SIZE) {
2586                         printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2587                                 "_members buffer\n");
2588                         break;
2589                 }
2590                 memcpy(page+len, buf, cur_len);
2591                 len += cur_len;
2592         }
2593         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2594
2595         return len;
2596 }
2597
2598 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2599
2600 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2601                         tg_pt_gp_group);
2602
2603 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2604         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2605         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2606         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2607         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2608         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2609         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2610         &target_core_alua_tg_pt_gp_preferred.attr,
2611         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2612         &target_core_alua_tg_pt_gp_members.attr,
2613         NULL,
2614 };
2615
2616 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2617 {
2618         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2619                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2620
2621         core_alua_free_tg_pt_gp(tg_pt_gp);
2622 }
2623
2624 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2625         .release                = target_core_alua_tg_pt_gp_release,
2626         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2627         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2628 };
2629
2630 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2631         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2632         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2633         .ct_owner               = THIS_MODULE,
2634 };
2635
2636 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2637
2638 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2639
2640 static struct config_group *target_core_alua_create_tg_pt_gp(
2641         struct config_group *group,
2642         const char *name)
2643 {
2644         struct t10_alua *alua = container_of(group, struct t10_alua,
2645                                         alua_tg_pt_gps_group);
2646         struct t10_alua_tg_pt_gp *tg_pt_gp;
2647         struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2648         struct config_group *alua_tg_pt_gp_cg = NULL;
2649         struct config_item *alua_tg_pt_gp_ci = NULL;
2650
2651         tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2652         if (!(tg_pt_gp))
2653                 return NULL;
2654
2655         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2656         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2657
2658         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2659                         &target_core_alua_tg_pt_gp_cit);
2660
2661         printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2662                 " Group: alua/tg_pt_gps/%s\n",
2663                 config_item_name(alua_tg_pt_gp_ci));
2664
2665         return alua_tg_pt_gp_cg;
2666 }
2667
2668 static void target_core_alua_drop_tg_pt_gp(
2669         struct config_group *group,
2670         struct config_item *item)
2671 {
2672         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2673                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2674
2675         printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2676                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2677                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2678         /*
2679          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2680          * -> target_core_alua_tg_pt_gp_release().
2681          */
2682         config_item_put(item);
2683 }
2684
2685 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2686         .make_group             = &target_core_alua_create_tg_pt_gp,
2687         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2688 };
2689
2690 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2691         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2692         .ct_owner               = THIS_MODULE,
2693 };
2694
2695 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2696
2697 /* Start functions for struct config_item_type target_core_alua_cit */
2698
2699 /*
2700  * target_core_alua_cit is a ConfigFS group that lives under
2701  * /sys/kernel/config/target/core/alua.  There are default groups
2702  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2703  * target_core_alua_cit in target_core_init_configfs() below.
2704  */
2705 static struct config_item_type target_core_alua_cit = {
2706         .ct_item_ops            = NULL,
2707         .ct_attrs               = NULL,
2708         .ct_owner               = THIS_MODULE,
2709 };
2710
2711 /* End functions for struct config_item_type target_core_alua_cit */
2712
2713 /* Start functions for struct config_item_type target_core_stat_cit */
2714
2715 static struct config_group *target_core_stat_mkdir(
2716         struct config_group *group,
2717         const char *name)
2718 {
2719         return ERR_PTR(-ENOSYS);
2720 }
2721
2722 static void target_core_stat_rmdir(
2723         struct config_group *group,
2724         struct config_item *item)
2725 {
2726         return;
2727 }
2728
2729 static struct configfs_group_operations target_core_stat_group_ops = {
2730         .make_group             = &target_core_stat_mkdir,
2731         .drop_item              = &target_core_stat_rmdir,
2732 };
2733
2734 static struct config_item_type target_core_stat_cit = {
2735         .ct_group_ops           = &target_core_stat_group_ops,
2736         .ct_owner               = THIS_MODULE,
2737 };
2738
2739 /* End functions for struct config_item_type target_core_stat_cit */
2740
2741 /* Start functions for struct config_item_type target_core_hba_cit */
2742
2743 static struct config_group *target_core_make_subdev(
2744         struct config_group *group,
2745         const char *name)
2746 {
2747         struct t10_alua_tg_pt_gp *tg_pt_gp;
2748         struct se_subsystem_dev *se_dev;
2749         struct se_subsystem_api *t;
2750         struct config_item *hba_ci = &group->cg_item;
2751         struct se_hba *hba = item_to_hba(hba_ci);
2752         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2753         struct config_group *dev_stat_grp = NULL;
2754         int errno = -ENOMEM, ret;
2755
2756         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2757         if (ret)
2758                 return ERR_PTR(ret);
2759         /*
2760          * Locate the struct se_subsystem_api from parent's struct se_hba.
2761          */
2762         t = hba->transport;
2763
2764         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2765         if (!se_dev) {
2766                 printk(KERN_ERR "Unable to allocate memory for"
2767                                 " struct se_subsystem_dev\n");
2768                 goto unlock;
2769         }
2770         INIT_LIST_HEAD(&se_dev->g_se_dev_list);
2771         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2772         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2773         INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
2774         INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
2775         spin_lock_init(&se_dev->t10_reservation.registration_lock);
2776         spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
2777         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2778         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2779         spin_lock_init(&se_dev->se_dev_lock);
2780         se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2781         se_dev->t10_wwn.t10_sub_dev = se_dev;
2782         se_dev->t10_alua.t10_sub_dev = se_dev;
2783         se_dev->se_dev_attrib.da_sub_dev = se_dev;
2784
2785         se_dev->se_dev_hba = hba;
2786         dev_cg = &se_dev->se_dev_group;
2787
2788         dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2789                         GFP_KERNEL);
2790         if (!(dev_cg->default_groups))
2791                 goto out;
2792         /*
2793          * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2794          * for ->allocate_virtdevice()
2795          *
2796          * se_dev->se_dev_ptr will be set after ->create_virtdev()
2797          * has been called successfully in the next level up in the
2798          * configfs tree for device object's struct config_group.
2799          */
2800         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2801         if (!(se_dev->se_dev_su_ptr)) {
2802                 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2803                         " from allocate_virtdevice()\n");
2804                 goto out;
2805         }
2806         spin_lock(&se_global->g_device_lock);
2807         list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
2808         spin_unlock(&se_global->g_device_lock);
2809
2810         config_group_init_type_name(&se_dev->se_dev_group, name,
2811                         &target_core_dev_cit);
2812         config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2813                         &target_core_dev_attrib_cit);
2814         config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2815                         &target_core_dev_pr_cit);
2816         config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2817                         &target_core_dev_wwn_cit);
2818         config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2819                         "alua", &target_core_alua_tg_pt_gps_cit);
2820         config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2821                         "statistics", &target_core_stat_cit);
2822
2823         dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2824         dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2825         dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2826         dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2827         dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2828         dev_cg->default_groups[5] = NULL;
2829         /*
2830          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2831          */
2832         tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2833         if (!(tg_pt_gp))
2834                 goto out;
2835
2836         tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2837         tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2838                                 GFP_KERNEL);
2839         if (!(tg_pt_gp_cg->default_groups)) {
2840                 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2841                                 "default_groups\n");
2842                 goto out;
2843         }
2844
2845         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2846                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2847         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2848         tg_pt_gp_cg->default_groups[1] = NULL;
2849         T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
2850         /*
2851          * Add core/$HBA/$DEV/statistics/ default groups
2852          */
2853         dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
2854         dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2855                                 GFP_KERNEL);
2856         if (!dev_stat_grp->default_groups) {
2857                 printk(KERN_ERR "Unable to allocate dev_stat_grp->default_groups\n");
2858                 goto out;
2859         }
2860         target_stat_setup_dev_default_groups(se_dev);
2861
2862         printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2863                 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2864
2865         mutex_unlock(&hba->hba_access_mutex);
2866         return &se_dev->se_dev_group;
2867 out:
2868         if (T10_ALUA(se_dev)->default_tg_pt_gp) {
2869                 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2870                 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2871         }
2872         if (dev_stat_grp)
2873                 kfree(dev_stat_grp->default_groups);
2874         if (tg_pt_gp_cg)
2875                 kfree(tg_pt_gp_cg->default_groups);
2876         if (dev_cg)
2877                 kfree(dev_cg->default_groups);
2878         if (se_dev->se_dev_su_ptr)
2879                 t->free_device(se_dev->se_dev_su_ptr);
2880         kfree(se_dev);
2881 unlock:
2882         mutex_unlock(&hba->hba_access_mutex);
2883         return ERR_PTR(errno);
2884 }
2885
2886 static void target_core_drop_subdev(
2887         struct config_group *group,
2888         struct config_item *item)
2889 {
2890         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2891                                 struct se_subsystem_dev, se_dev_group);
2892         struct se_hba *hba;
2893         struct se_subsystem_api *t;
2894         struct config_item *df_item;
2895         struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2896         int i;
2897
2898         hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2899
2900         mutex_lock(&hba->hba_access_mutex);
2901         t = hba->transport;
2902
2903         spin_lock(&se_global->g_device_lock);
2904         list_del(&se_dev->g_se_dev_list);
2905         spin_unlock(&se_global->g_device_lock);
2906
2907         dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
2908         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2909                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2910                 dev_stat_grp->default_groups[i] = NULL;
2911                 config_item_put(df_item);
2912         }
2913         kfree(dev_stat_grp->default_groups);
2914
2915         tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2916         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2917                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2918                 tg_pt_gp_cg->default_groups[i] = NULL;
2919                 config_item_put(df_item);
2920         }
2921         kfree(tg_pt_gp_cg->default_groups);
2922         /*
2923          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2924          * directly from target_core_alua_tg_pt_gp_release().
2925          */
2926         T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2927
2928         dev_cg = &se_dev->se_dev_group;
2929         for (i = 0; dev_cg->default_groups[i]; i++) {
2930                 df_item = &dev_cg->default_groups[i]->cg_item;
2931                 dev_cg->default_groups[i] = NULL;
2932                 config_item_put(df_item);
2933         }
2934         /*
2935          * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2936          * from target_core_dev_item_ops->release() ->target_core_dev_release().
2937          */
2938         config_item_put(item);
2939         mutex_unlock(&hba->hba_access_mutex);
2940 }
2941
2942 static struct configfs_group_operations target_core_hba_group_ops = {
2943         .make_group             = target_core_make_subdev,
2944         .drop_item              = target_core_drop_subdev,
2945 };
2946
2947 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2948 #define SE_HBA_ATTR(_name, _mode)                               \
2949 static struct target_core_hba_attribute                         \
2950                 target_core_hba_##_name =                       \
2951                 __CONFIGFS_EATTR(_name, _mode,                  \
2952                 target_core_hba_show_attr_##_name,              \
2953                 target_core_hba_store_attr_##_name);
2954
2955 #define SE_HBA_ATTR_RO(_name)                                   \
2956 static struct target_core_hba_attribute                         \
2957                 target_core_hba_##_name =                       \
2958                 __CONFIGFS_EATTR_RO(_name,                      \
2959                 target_core_hba_show_attr_##_name);
2960
2961 static ssize_t target_core_hba_show_attr_hba_info(
2962         struct se_hba *hba,
2963         char *page)
2964 {
2965         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2966                         hba->hba_id, hba->transport->name,
2967                         TARGET_CORE_CONFIGFS_VERSION);
2968 }
2969
2970 SE_HBA_ATTR_RO(hba_info);
2971
2972 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2973                                 char *page)
2974 {
2975         int hba_mode = 0;
2976
2977         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2978                 hba_mode = 1;
2979
2980         return sprintf(page, "%d\n", hba_mode);
2981 }
2982
2983 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2984                                 const char *page, size_t count)
2985 {
2986         struct se_subsystem_api *transport = hba->transport;
2987         unsigned long mode_flag;
2988         int ret;
2989
2990         if (transport->pmode_enable_hba == NULL)
2991                 return -EINVAL;
2992
2993         ret = strict_strtoul(page, 0, &mode_flag);
2994         if (ret < 0) {
2995                 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2996                 return -EINVAL;
2997         }
2998
2999         spin_lock(&hba->device_lock);
3000         if (!(list_empty(&hba->hba_dev_list))) {
3001                 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
3002                 spin_unlock(&hba->device_lock);
3003                 return -EINVAL;
3004         }
3005         spin_unlock(&hba->device_lock);
3006
3007         ret = transport->pmode_enable_hba(hba, mode_flag);
3008         if (ret < 0)
3009                 return -EINVAL;
3010         if (ret > 0)
3011                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3012         else if (ret == 0)
3013                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3014
3015         return count;
3016 }
3017
3018 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3019
3020 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3021
3022 static void target_core_hba_release(struct config_item *item)
3023 {
3024         struct se_hba *hba = container_of(to_config_group(item),
3025                                 struct se_hba, hba_group);
3026         core_delete_hba(hba);
3027 }
3028
3029 static struct configfs_attribute *target_core_hba_attrs[] = {
3030         &target_core_hba_hba_info.attr,
3031         &target_core_hba_hba_mode.attr,
3032         NULL,
3033 };
3034
3035 static struct configfs_item_operations target_core_hba_item_ops = {
3036         .release                = target_core_hba_release,
3037         .show_attribute         = target_core_hba_attr_show,
3038         .store_attribute        = target_core_hba_attr_store,
3039 };
3040
3041 static struct config_item_type target_core_hba_cit = {
3042         .ct_item_ops            = &target_core_hba_item_ops,
3043         .ct_group_ops           = &target_core_hba_group_ops,
3044         .ct_attrs               = target_core_hba_attrs,
3045         .ct_owner               = THIS_MODULE,
3046 };
3047
3048 static struct config_group *target_core_call_addhbatotarget(
3049         struct config_group *group,
3050         const char *name)
3051 {
3052         char *se_plugin_str, *str, *str2;
3053         struct se_hba *hba;
3054         char buf[TARGET_CORE_NAME_MAX_LEN];
3055         unsigned long plugin_dep_id = 0;
3056         int ret;
3057
3058         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3059         if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) {
3060                 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
3061                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3062                         TARGET_CORE_NAME_MAX_LEN);
3063                 return ERR_PTR(-ENAMETOOLONG);
3064         }
3065         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3066
3067         str = strstr(buf, "_");
3068         if (!(str)) {
3069                 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3070                 return ERR_PTR(-EINVAL);
3071         }
3072         se_plugin_str = buf;
3073         /*
3074          * Special case for subsystem plugins that have "_" in their names.
3075          * Namely rd_direct and rd_mcp..
3076          */
3077         str2 = strstr(str+1, "_");
3078         if ((str2)) {
3079                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3080                 str2++; /* Skip to start of plugin dependent ID */
3081                 str = str2;
3082         } else {
3083                 *str = '\0'; /* Terminate for *se_plugin_str */
3084                 str++; /* Skip to start of plugin dependent ID */
3085         }
3086
3087         ret = strict_strtoul(str, 0, &plugin_dep_id);
3088         if (ret < 0) {
3089                 printk(KERN_ERR "strict_strtoul() returned %d for"
3090                                 " plugin_dep_id\n", ret);
3091                 return ERR_PTR(-EINVAL);
3092         }
3093         /*
3094          * Load up TCM subsystem plugins if they have not already been loaded.
3095          */
3096         if (transport_subsystem_check_init() < 0)
3097                 return ERR_PTR(-EINVAL);
3098
3099         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3100         if (IS_ERR(hba))
3101                 return ERR_CAST(hba);
3102
3103         config_group_init_type_name(&hba->hba_group, name,
3104                         &target_core_hba_cit);
3105
3106         return &hba->hba_group;
3107 }
3108
3109 static void target_core_call_delhbafromtarget(
3110         struct config_group *group,
3111         struct config_item *item)
3112 {
3113         /*
3114          * core_delete_hba() is called from target_core_hba_item_ops->release()
3115          * -> target_core_hba_release()
3116          */
3117         config_item_put(item);
3118 }
3119
3120 static struct configfs_group_operations target_core_group_ops = {
3121         .make_group     = target_core_call_addhbatotarget,
3122         .drop_item      = target_core_call_delhbafromtarget,
3123 };
3124
3125 static struct config_item_type target_core_cit = {
3126         .ct_item_ops    = NULL,
3127         .ct_group_ops   = &target_core_group_ops,
3128         .ct_attrs       = NULL,
3129         .ct_owner       = THIS_MODULE,
3130 };
3131
3132 /* Stop functions for struct config_item_type target_core_hba_cit */
3133
3134 static int __init target_core_init_configfs(void)
3135 {
3136         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3137         struct config_group *lu_gp_cg = NULL;
3138         struct configfs_subsystem *subsys;
3139         struct t10_alua_lu_gp *lu_gp;
3140         int ret;
3141
3142         printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3143                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3144                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3145
3146         subsys = target_core_subsystem[0];
3147         config_group_init(&subsys->su_group);
3148         mutex_init(&subsys->su_mutex);
3149
3150         INIT_LIST_HEAD(&g_tf_list);
3151         mutex_init(&g_tf_lock);
3152         init_scsi_index_table();
3153         ret = init_se_global();
3154         if (ret < 0)
3155                 return -1;
3156         /*
3157          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3158          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3159          */
3160         target_cg = &subsys->su_group;
3161         target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3162                                 GFP_KERNEL);
3163         if (!(target_cg->default_groups)) {
3164                 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3165                 goto out_global;
3166         }
3167
3168         config_group_init_type_name(&se_global->target_core_hbagroup,
3169                         "core", &target_core_cit);
3170         target_cg->default_groups[0] = &se_global->target_core_hbagroup;
3171         target_cg->default_groups[1] = NULL;
3172         /*
3173          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3174          */
3175         hba_cg = &se_global->target_core_hbagroup;
3176         hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3177                                 GFP_KERNEL);
3178         if (!(hba_cg->default_groups)) {
3179                 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3180                 goto out_global;
3181         }
3182         config_group_init_type_name(&se_global->alua_group,
3183                         "alua", &target_core_alua_cit);
3184         hba_cg->default_groups[0] = &se_global->alua_group;
3185         hba_cg->default_groups[1] = NULL;
3186         /*
3187          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3188          * groups under /sys/kernel/config/target/core/alua/
3189          */
3190         alua_cg = &se_global->alua_group;
3191         alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3192                         GFP_KERNEL);
3193         if (!(alua_cg->default_groups)) {
3194                 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3195                 goto out_global;
3196         }
3197
3198         config_group_init_type_name(&se_global->alua_lu_gps_group,
3199                         "lu_gps", &target_core_alua_lu_gps_cit);
3200         alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
3201         alua_cg->default_groups[1] = NULL;
3202         /*
3203          * Add core/alua/lu_gps/default_lu_gp
3204          */
3205         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3206         if (IS_ERR(lu_gp))
3207                 goto out_global;
3208
3209         lu_gp_cg = &se_global->alua_lu_gps_group;
3210         lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3211                         GFP_KERNEL);
3212         if (!(lu_gp_cg->default_groups)) {
3213                 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3214                 goto out_global;
3215         }
3216
3217         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3218                                 &target_core_alua_lu_gp_cit);
3219         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3220         lu_gp_cg->default_groups[1] = NULL;
3221         se_global->default_lu_gp = lu_gp;
3222         /*
3223          * Register the target_core_mod subsystem with configfs.
3224          */
3225         ret = configfs_register_subsystem(subsys);
3226         if (ret < 0) {
3227                 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3228                         ret, subsys->su_group.cg_item.ci_namebuf);
3229                 goto out_global;
3230         }
3231         printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3232                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3233                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3234         /*
3235          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3236          */
3237         ret = rd_module_init();
3238         if (ret < 0)
3239                 goto out;
3240
3241         if (core_dev_setup_virtual_lun0() < 0)
3242                 goto out;
3243
3244         return 0;
3245
3246 out:
3247         configfs_unregister_subsystem(subsys);
3248         core_dev_release_virtual_lun0();
3249         rd_module_exit();
3250 out_global:
3251         if (se_global->default_lu_gp) {
3252                 core_alua_free_lu_gp(se_global->default_lu_gp);
3253                 se_global->default_lu_gp = NULL;
3254         }
3255         if (lu_gp_cg)
3256                 kfree(lu_gp_cg->default_groups);
3257         if (alua_cg)
3258                 kfree(alua_cg->default_groups);
3259         if (hba_cg)
3260                 kfree(hba_cg->default_groups);
3261         kfree(target_cg->default_groups);
3262         release_se_global();
3263         return -1;
3264 }
3265
3266 static void __exit target_core_exit_configfs(void)
3267 {
3268         struct configfs_subsystem *subsys;
3269         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3270         struct config_item *item;
3271         int i;
3272
3273         se_global->in_shutdown = 1;
3274         subsys = target_core_subsystem[0];
3275
3276         lu_gp_cg = &se_global->alua_lu_gps_group;
3277         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3278                 item = &lu_gp_cg->default_groups[i]->cg_item;
3279                 lu_gp_cg->default_groups[i] = NULL;
3280                 config_item_put(item);
3281         }
3282         kfree(lu_gp_cg->default_groups);
3283         lu_gp_cg->default_groups = NULL;
3284
3285         alua_cg = &se_global->alua_group;
3286         for (i = 0; alua_cg->default_groups[i]; i++) {
3287                 item = &alua_cg->default_groups[i]->cg_item;
3288                 alua_cg->default_groups[i] = NULL;
3289                 config_item_put(item);
3290         }
3291         kfree(alua_cg->default_groups);
3292         alua_cg->default_groups = NULL;
3293
3294         hba_cg = &se_global->target_core_hbagroup;
3295         for (i = 0; hba_cg->default_groups[i]; i++) {
3296                 item = &hba_cg->default_groups[i]->cg_item;
3297                 hba_cg->default_groups[i] = NULL;
3298                 config_item_put(item);
3299         }
3300         kfree(hba_cg->default_groups);
3301         hba_cg->default_groups = NULL;
3302         /*
3303          * We expect subsys->su_group.default_groups to be released
3304          * by configfs subsystem provider logic..
3305          */
3306         configfs_unregister_subsystem(subsys);
3307         kfree(subsys->su_group.default_groups);
3308
3309         core_alua_free_lu_gp(se_global->default_lu_gp);
3310         se_global->default_lu_gp = NULL;
3311
3312         printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3313                         " Infrastructure\n");
3314
3315         core_dev_release_virtual_lun0();
3316         rd_module_exit();
3317         release_se_global();
3318
3319         return;
3320 }
3321
3322 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3323 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3324 MODULE_LICENSE("GPL");
3325
3326 module_init(target_core_init_configfs);
3327 module_exit(target_core_exit_configfs);