drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * Copyright (c) 2008-2011 Rising Tide Systems
   7  * Copyright (c) 2008-2011 Linux-iSCSI.org
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  ****************************************************************************/
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <generated/utsrelease.h>
  27 #include <linux/utsname.h>
  28 #include <linux/init.h>
  29 #include <linux/fs.h>
  30 #include <linux/namei.h>
  31 #include <linux/slab.h>
  32 #include <linux/types.h>
  33 #include <linux/delay.h>
  34 #include <linux/unistd.h>
  35 #include <linux/string.h>
  36 #include <linux/parser.h>
  37 #include <linux/syscalls.h>
  38 #include <linux/configfs.h>
  39 #include <linux/spinlock.h>
  40
  41 #include <target/target_core_base.h>
  42 #include <target/target_core_device.h>
  43 #include <target/target_core_transport.h>
  44 #include <target/target_core_fabric_ops.h>
  45 #include <target/target_core_fabric_configfs.h>
  46 #include <target/target_core_configfs.h>
  47 #include <target/configfs_macros.h>
  48
  49 #include "target_core_alua.h"
  50 #include "target_core_hba.h"
  51 #include "target_core_pr.h"
  52 #include "target_core_rd.h"
  53 #include "target_core_stat.h"
  54
  55 extern struct t10_alua_lu_gp *default_lu_gp;
  56
  57 static struct list_head g_tf_list;
  58 static struct mutex g_tf_lock;
  59
  60 struct target_core_configfs_attribute {
  61         struct configfs_attribute attr;
  62         ssize_t (*show)(void *, char *);
  63         ssize_t (*store)(void *, const char *, size_t);
  64 };
  65
  66 static struct config_group target_core_hbagroup;
  67 static struct config_group alua_group;
  68 static struct config_group alua_lu_gps_group;
  69
  70 static DEFINE_SPINLOCK(se_device_lock);
  71 static LIST_HEAD(se_dev_list);
  72
  73 static inline struct se_hba *
  74 item_to_hba(struct config_item *item)
  75 {
  76         return container_of(to_config_group(item), struct se_hba, hba_group);
  77 }
  78
  79 /*
  80  * Attributes for /sys/kernel/config/target/
  81  */
  82 static ssize_t target_core_attr_show(struct config_item *item,
  83                                       struct configfs_attribute *attr,
  84                                       char *page)
  85 {
  86         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  87                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  88                 utsname()->sysname, utsname()->machine);
  89 }
  90
  91 static struct configfs_item_operations target_core_fabric_item_ops = {
  92         .show_attribute = target_core_attr_show,
  93 };
  94
  95 static struct configfs_attribute target_core_item_attr_version = {
  96         .ca_owner       = THIS_MODULE,
  97         .ca_name        = "version",
  98         .ca_mode        = S_IRUGO,
  99 };
 100
 101 static struct target_fabric_configfs *target_core_get_fabric(
 102         const char *name)
 103 {
 104         struct target_fabric_configfs *tf;
 105
 106         if (!name)
 107                 return NULL;
 108
 109         mutex_lock(&g_tf_lock);
 110         list_for_each_entry(tf, &g_tf_list, tf_list) {
 111                 if (!strcmp(tf->tf_name, name)) {
 112                         atomic_inc(&tf->tf_access_cnt);
 113                         mutex_unlock(&g_tf_lock);
 114                         return tf;
 115                 }
 116         }
 117         mutex_unlock(&g_tf_lock);
 118
 119         return NULL;
 120 }
 121
 122 /*
 123  * Called from struct target_core_group_ops->make_group()
 124  */
 125 static struct config_group *target_core_register_fabric(
 126         struct config_group *group,
 127         const char *name)
 128 {
 129         struct target_fabric_configfs *tf;
 130         int ret;
 131
 132         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 133                         " %s\n", group, name);
 134         /*
 135          * Below are some hardcoded request_module() calls to automatically
 136          * local fabric modules when the following is called:
 137          *
 138          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 139          *
 140          * Note that this does not limit which TCM fabric module can be
 141          * registered, but simply provids auto loading logic for modules with
 142          * mkdir(2) system calls with known TCM fabric modules.
 143          */
 144         if (!strncmp(name, "iscsi", 5)) {
 145                 /*
 146                  * Automatically load the LIO Target fabric module when the
 147                  * following is called:
 148                  *
 149                  * mkdir -p $CONFIGFS/target/iscsi
 150                  */
 151                 ret = request_module("iscsi_target_mod");
 152                 if (ret < 0) {
 153                         pr_err("request_module() failed for"
 154                                 " iscsi_target_mod.ko: %d\n", ret);
 155                         return ERR_PTR(-EINVAL);
 156                 }
 157         } else if (!strncmp(name, "loopback", 8)) {
 158                 /*
 159                  * Automatically load the tcm_loop fabric module when the
 160                  * following is called:
 161                  *
 162                  * mkdir -p $CONFIGFS/target/loopback
 163                  */
 164                 ret = request_module("tcm_loop");
 165                 if (ret < 0) {
 166                         pr_err("request_module() failed for"
 167                                 " tcm_loop.ko: %d\n", ret);
 168                         return ERR_PTR(-EINVAL);
 169                 }
 170         }
 171
 172         tf = target_core_get_fabric(name);
 173         if (!tf) {
 174                 pr_err("target_core_get_fabric() failed for %s\n",
 175                         name);
 176                 return ERR_PTR(-EINVAL);
 177         }
 178         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 179                         " %s\n", tf->tf_name);
 180         /*
 181          * On a successful target_core_get_fabric() look, the returned
 182          * struct target_fabric_configfs *tf will contain a usage reference.
 183          */
 184         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 185                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 186
 187         tf->tf_group.default_groups = tf->tf_default_groups;
 188         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 189         tf->tf_group.default_groups[1] = NULL;
 190
 191         config_group_init_type_name(&tf->tf_group, name,
 192                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 193         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 194                         &TF_CIT_TMPL(tf)->tfc_discovery_cit);
 195
 196         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 197                         " %s\n", tf->tf_group.cg_item.ci_name);
 198         /*
 199          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 200          */
 201         tf->tf_ops.tf_subsys = tf->tf_subsys;
 202         tf->tf_fabric = &tf->tf_group.cg_item;
 203         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 204                         " for %s\n", name);
 205
 206         return &tf->tf_group;
 207 }
 208
 209 /*
 210  * Called from struct target_core_group_ops->drop_item()
 211  */
 212 static void target_core_deregister_fabric(
 213         struct config_group *group,
 214         struct config_item *item)
 215 {
 216         struct target_fabric_configfs *tf = container_of(
 217                 to_config_group(item), struct target_fabric_configfs, tf_group);
 218         struct config_group *tf_group;
 219         struct config_item *df_item;
 220         int i;
 221
 222         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 223                 " tf list\n", config_item_name(item));
 224
 225         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 226                         " %s\n", tf->tf_name);
 227         atomic_dec(&tf->tf_access_cnt);
 228
 229         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 230                         " tf->tf_fabric for %s\n", tf->tf_name);
 231         tf->tf_fabric = NULL;
 232
 233         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 234                         " %s\n", config_item_name(item));
 235
 236         tf_group = &tf->tf_group;
 237         for (i = 0; tf_group->default_groups[i]; i++) {
 238                 df_item = &tf_group->default_groups[i]->cg_item;
 239                 tf_group->default_groups[i] = NULL;
 240                 config_item_put(df_item);
 241         }
 242         config_item_put(item);
 243 }
 244
 245 static struct configfs_group_operations target_core_fabric_group_ops = {
 246         .make_group     = &target_core_register_fabric,
 247         .drop_item      = &target_core_deregister_fabric,
 248 };
 249
 250 /*
 251  * All item attributes appearing in /sys/kernel/target/ appear here.
 252  */
 253 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 254         &target_core_item_attr_version,
 255         NULL,
 256 };
 257
 258 /*
 259  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 260  */
 261 static struct config_item_type target_core_fabrics_item = {
 262         .ct_item_ops    = &target_core_fabric_item_ops,
 263         .ct_group_ops   = &target_core_fabric_group_ops,
 264         .ct_attrs       = target_core_fabric_item_attrs,
 265         .ct_owner       = THIS_MODULE,
 266 };
 267
 268 static struct configfs_subsystem target_core_fabrics = {
 269         .su_group = {
 270                 .cg_item = {
 271                         .ci_namebuf = "target",
 272                         .ci_type = &target_core_fabrics_item,
 273                 },
 274         },
 275 };
 276
 277 static struct configfs_subsystem *target_core_subsystem[] = {
 278         &target_core_fabrics,
 279         NULL,
 280 };
 281
 282 /*##############################################################################
 283 // Start functions called by external Target Fabrics Modules
 284 //############################################################################*/
 285
 286 /*
 287  * First function called by fabric modules to:
 288  *
 289  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 290  * 2) Add struct target_fabric_configfs to g_tf_list
 291  * 3) Return struct target_fabric_configfs to fabric module to be passed
 292  *    into target_fabric_configfs_register().
 293  */
 294 struct target_fabric_configfs *target_fabric_configfs_init(
 295         struct module *fabric_mod,
 296         const char *name)
 297 {
 298         struct target_fabric_configfs *tf;
 299
 300         if (!(name)) {
 301                 pr_err("Unable to locate passed fabric name\n");
 302                 return ERR_PTR(-EINVAL);
 303         }
 304         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 305                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 306                         "_NAME_SIZE\n", name);
 307                 return ERR_PTR(-EINVAL);
 308         }
 309
 310         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 311         if (!tf)
 312                 return ERR_PTR(-ENOMEM);
 313
 314         INIT_LIST_HEAD(&tf->tf_list);
 315         atomic_set(&tf->tf_access_cnt, 0);
 316         /*
 317          * Setup the default generic struct config_item_type's (cits) in
 318          * struct target_fabric_configfs->tf_cit_tmpl
 319          */
 320         tf->tf_module = fabric_mod;
 321         target_fabric_setup_cits(tf);
 322
 323         tf->tf_subsys = target_core_subsystem[0];
 324         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 325
 326         mutex_lock(&g_tf_lock);
 327         list_add_tail(&tf->tf_list, &g_tf_list);
 328         mutex_unlock(&g_tf_lock);
 329
 330         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 331                         ">>>>>>>>>>>>>>\n");
 332         pr_debug("Initialized struct target_fabric_configfs: %p for"
 333                         " %s\n", tf, tf->tf_name);
 334         return tf;
 335 }
 336 EXPORT_SYMBOL(target_fabric_configfs_init);
 337
 338 /*
 339  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 340  */
 341 void target_fabric_configfs_free(
 342         struct target_fabric_configfs *tf)
 343 {
 344         mutex_lock(&g_tf_lock);
 345         list_del(&tf->tf_list);
 346         mutex_unlock(&g_tf_lock);
 347
 348         kfree(tf);
 349 }
 350 EXPORT_SYMBOL(target_fabric_configfs_free);
 351
 352 /*
 353  * Perform a sanity check of the passed tf->tf_ops before completing
 354  * TCM fabric module registration.
 355  */
 356 static int target_fabric_tf_ops_check(
 357         struct target_fabric_configfs *tf)
 358 {
 359         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 360
 361         if (!tfo->get_fabric_name) {
 362                 pr_err("Missing tfo->get_fabric_name()\n");
 363                 return -EINVAL;
 364         }
 365         if (!tfo->get_fabric_proto_ident) {
 366                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 367                 return -EINVAL;
 368         }
 369         if (!tfo->tpg_get_wwn) {
 370                 pr_err("Missing tfo->tpg_get_wwn()\n");
 371                 return -EINVAL;
 372         }
 373         if (!tfo->tpg_get_tag) {
 374                 pr_err("Missing tfo->tpg_get_tag()\n");
 375                 return -EINVAL;
 376         }
 377         if (!tfo->tpg_get_default_depth) {
 378                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 379                 return -EINVAL;
 380         }
 381         if (!tfo->tpg_get_pr_transport_id) {
 382                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 383                 return -EINVAL;
 384         }
 385         if (!tfo->tpg_get_pr_transport_id_len) {
 386                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 387                 return -EINVAL;
 388         }
 389         if (!tfo->tpg_check_demo_mode) {
 390                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 391                 return -EINVAL;
 392         }
 393         if (!tfo->tpg_check_demo_mode_cache) {
 394                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 395                 return -EINVAL;
 396         }
 397         if (!tfo->tpg_check_demo_mode_write_protect) {
 398                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 399                 return -EINVAL;
 400         }
 401         if (!tfo->tpg_check_prod_mode_write_protect) {
 402                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 403                 return -EINVAL;
 404         }
 405         if (!tfo->tpg_alloc_fabric_acl) {
 406                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 407                 return -EINVAL;
 408         }
 409         if (!tfo->tpg_release_fabric_acl) {
 410                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 411                 return -EINVAL;
 412         }
 413         if (!tfo->tpg_get_inst_index) {
 414                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 415                 return -EINVAL;
 416         }
 417         if (!tfo->release_cmd) {
 418                 pr_err("Missing tfo->release_cmd()\n");
 419                 return -EINVAL;
 420         }
 421         if (!tfo->shutdown_session) {
 422                 pr_err("Missing tfo->shutdown_session()\n");
 423                 return -EINVAL;
 424         }
 425         if (!tfo->close_session) {
 426                 pr_err("Missing tfo->close_session()\n");
 427                 return -EINVAL;
 428         }
 429         if (!tfo->stop_session) {
 430                 pr_err("Missing tfo->stop_session()\n");
 431                 return -EINVAL;
 432         }
 433         if (!tfo->fall_back_to_erl0) {
 434                 pr_err("Missing tfo->fall_back_to_erl0()\n");
 435                 return -EINVAL;
 436         }
 437         if (!tfo->sess_logged_in) {
 438                 pr_err("Missing tfo->sess_logged_in()\n");
 439                 return -EINVAL;
 440         }
 441         if (!tfo->sess_get_index) {
 442                 pr_err("Missing tfo->sess_get_index()\n");
 443                 return -EINVAL;
 444         }
 445         if (!tfo->write_pending) {
 446                 pr_err("Missing tfo->write_pending()\n");
 447                 return -EINVAL;
 448         }
 449         if (!tfo->write_pending_status) {
 450                 pr_err("Missing tfo->write_pending_status()\n");
 451                 return -EINVAL;
 452         }
 453         if (!tfo->set_default_node_attributes) {
 454                 pr_err("Missing tfo->set_default_node_attributes()\n");
 455                 return -EINVAL;
 456         }
 457         if (!tfo->get_task_tag) {
 458                 pr_err("Missing tfo->get_task_tag()\n");
 459                 return -EINVAL;
 460         }
 461         if (!tfo->get_cmd_state) {
 462                 pr_err("Missing tfo->get_cmd_state()\n");
 463                 return -EINVAL;
 464         }
 465         if (!tfo->queue_data_in) {
 466                 pr_err("Missing tfo->queue_data_in()\n");
 467                 return -EINVAL;
 468         }
 469         if (!tfo->queue_status) {
 470                 pr_err("Missing tfo->queue_status()\n");
 471                 return -EINVAL;
 472         }
 473         if (!tfo->queue_tm_rsp) {
 474                 pr_err("Missing tfo->queue_tm_rsp()\n");
 475                 return -EINVAL;
 476         }
 477         if (!tfo->set_fabric_sense_len) {
 478                 pr_err("Missing tfo->set_fabric_sense_len()\n");
 479                 return -EINVAL;
 480         }
 481         if (!tfo->get_fabric_sense_len) {
 482                 pr_err("Missing tfo->get_fabric_sense_len()\n");
 483                 return -EINVAL;
 484         }
 485         if (!tfo->is_state_remove) {
 486                 pr_err("Missing tfo->is_state_remove()\n");
 487                 return -EINVAL;
 488         }
 489         /*
 490          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 491          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 492          * target_core_fabric_configfs.c WWN+TPG group context code.
 493          */
 494         if (!tfo->fabric_make_wwn) {
 495                 pr_err("Missing tfo->fabric_make_wwn()\n");
 496                 return -EINVAL;
 497         }
 498         if (!tfo->fabric_drop_wwn) {
 499                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 500                 return -EINVAL;
 501         }
 502         if (!tfo->fabric_make_tpg) {
 503                 pr_err("Missing tfo->fabric_make_tpg()\n");
 504                 return -EINVAL;
 505         }
 506         if (!tfo->fabric_drop_tpg) {
 507                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 508                 return -EINVAL;
 509         }
 510
 511         return 0;
 512 }
 513
 514 /*
 515  * Called 2nd from fabric module with returned parameter of
 516  * struct target_fabric_configfs * from target_fabric_configfs_init().
 517  *
 518  * Upon a successful registration, the new fabric's struct config_item is
 519  * return.  Also, a pointer to this struct is set in the passed
 520  * struct target_fabric_configfs.
 521  */
 522 int target_fabric_configfs_register(
 523         struct target_fabric_configfs *tf)
 524 {
 525         int ret;
 526
 527         if (!tf) {
 528                 pr_err("Unable to locate target_fabric_configfs"
 529                         " pointer\n");
 530                 return -EINVAL;
 531         }
 532         if (!tf->tf_subsys) {
 533                 pr_err("Unable to target struct config_subsystem"
 534                         " pointer\n");
 535                 return -EINVAL;
 536         }
 537         ret = target_fabric_tf_ops_check(tf);
 538         if (ret < 0)
 539                 return ret;
 540
 541         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 542                 ">>>>>>>>>>\n");
 543         return 0;
 544 }
 545 EXPORT_SYMBOL(target_fabric_configfs_register);
 546
 547 void target_fabric_configfs_deregister(
 548         struct target_fabric_configfs *tf)
 549 {
 550         struct configfs_subsystem *su;
 551
 552         if (!tf) {
 553                 pr_err("Unable to locate passed target_fabric_"
 554                         "configfs\n");
 555                 return;
 556         }
 557         su = tf->tf_subsys;
 558         if (!su) {
 559                 pr_err("Unable to locate passed tf->tf_subsys"
 560                         " pointer\n");
 561                 return;
 562         }
 563         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 564                         ">>>>>>>>>>>>\n");
 565         mutex_lock(&g_tf_lock);
 566         if (atomic_read(&tf->tf_access_cnt)) {
 567                 mutex_unlock(&g_tf_lock);
 568                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 569                         tf->tf_name);
 570                 BUG();
 571         }
 572         list_del(&tf->tf_list);
 573         mutex_unlock(&g_tf_lock);
 574
 575         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 576                         " %s\n", tf->tf_name);
 577         tf->tf_module = NULL;
 578         tf->tf_subsys = NULL;
 579         kfree(tf);
 580
 581         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 582                         ">>>>>\n");
 583 }
 584 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 585
 586 /*##############################################################################
 587 // Stop functions called by external Target Fabrics Modules
 588 //############################################################################*/
 589
 590 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 591
 592 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 593 static ssize_t target_core_dev_show_attr_##_name(                       \
 594         struct se_dev_attrib *da,                                       \
 595         char *page)                                                     \
 596 {                                                                       \
 597         struct se_device *dev;                                          \
 598         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 599         ssize_t rb;                                                     \
 600                                                                         \
 601         spin_lock(&se_dev->se_dev_lock);                                \
 602         dev = se_dev->se_dev_ptr;                                       \
 603         if (!dev) {                                                     \
 604                 spin_unlock(&se_dev->se_dev_lock);                      \
 605                 return -ENODEV;                                         \
 606         }                                                               \
 607         rb = snprintf(page, PAGE_SIZE, "%u\n",                          \
 608                 (u32)dev->se_sub_dev->se_dev_attrib._name);             \
 609         spin_unlock(&se_dev->se_dev_lock);                              \
 610                                                                         \
 611         return rb;                                                      \
 612 }
 613
 614 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 615 static ssize_t target_core_dev_store_attr_##_name(                      \
 616         struct se_dev_attrib *da,                                       \
 617         const char *page,                                               \
 618         size_t count)                                                   \
 619 {                                                                       \
 620         struct se_device *dev;                                          \
 621         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 622         unsigned long val;                                              \
 623         int ret;                                                        \
 624                                                                         \
 625         spin_lock(&se_dev->se_dev_lock);                                \
 626         dev = se_dev->se_dev_ptr;                                       \
 627         if (!dev) {                                                     \
 628                 spin_unlock(&se_dev->se_dev_lock);                      \
 629                 return -ENODEV;                                         \
 630         }                                                               \
 631         ret = strict_strtoul(page, 0, &val);                            \
 632         if (ret < 0) {                                                  \
 633                 spin_unlock(&se_dev->se_dev_lock);                      \
 634                 pr_err("strict_strtoul() failed with"           \
 635                         " ret: %d\n", ret);                             \
 636                 return -EINVAL;                                         \
 637         }                                                               \
 638         ret = se_dev_set_##_name(dev, (u32)val);                        \
 639         spin_unlock(&se_dev->se_dev_lock);                              \
 640                                                                         \
 641         return (!ret) ? count : -EINVAL;                                \
 642 }
 643
 644 #define DEF_DEV_ATTRIB(_name)                                           \
 645 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 646 DEF_DEV_ATTRIB_STORE(_name);
 647
 648 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 649 DEF_DEV_ATTRIB_SHOW(_name);
 650
 651 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 652 #define SE_DEV_ATTR(_name, _mode)                                       \
 653 static struct target_core_dev_attrib_attribute                          \
 654                         target_core_dev_attrib_##_name =                \
 655                 __CONFIGFS_EATTR(_name, _mode,                          \
 656                 target_core_dev_show_attr_##_name,                      \
 657                 target_core_dev_store_attr_##_name);
 658
 659 #define SE_DEV_ATTR_RO(_name);                                          \
 660 static struct target_core_dev_attrib_attribute                          \
 661                         target_core_dev_attrib_##_name =                \
 662         __CONFIGFS_EATTR_RO(_name,                                      \
 663         target_core_dev_show_attr_##_name);
 664
 665 DEF_DEV_ATTRIB(emulate_dpo);
 666 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 667
 668 DEF_DEV_ATTRIB(emulate_fua_write);
 669 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 670
 671 DEF_DEV_ATTRIB(emulate_fua_read);
 672 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 673
 674 DEF_DEV_ATTRIB(emulate_write_cache);
 675 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 676
 677 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 678 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 679
 680 DEF_DEV_ATTRIB(emulate_tas);
 681 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 682
 683 DEF_DEV_ATTRIB(emulate_tpu);
 684 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 685
 686 DEF_DEV_ATTRIB(emulate_tpws);
 687 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 688
 689 DEF_DEV_ATTRIB(enforce_pr_isids);
 690 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 691
 692 DEF_DEV_ATTRIB(is_nonrot);
 693 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 694
 695 DEF_DEV_ATTRIB(emulate_rest_reord);
 696 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 697
 698 DEF_DEV_ATTRIB_RO(hw_block_size);
 699 SE_DEV_ATTR_RO(hw_block_size);
 700
 701 DEF_DEV_ATTRIB(block_size);
 702 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 703
 704 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 705 SE_DEV_ATTR_RO(hw_max_sectors);
 706
 707 DEF_DEV_ATTRIB(max_sectors);
 708 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
 709
 710 DEF_DEV_ATTRIB(optimal_sectors);
 711 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 712
 713 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 714 SE_DEV_ATTR_RO(hw_queue_depth);
 715
 716 DEF_DEV_ATTRIB(queue_depth);
 717 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 718
 719 DEF_DEV_ATTRIB(task_timeout);
 720 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
 721
 722 DEF_DEV_ATTRIB(max_unmap_lba_count);
 723 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 724
 725 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 726 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 727
 728 DEF_DEV_ATTRIB(unmap_granularity);
 729 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 730
 731 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 732 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 733
 734 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 735
 736 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 737         &target_core_dev_attrib_emulate_dpo.attr,
 738         &target_core_dev_attrib_emulate_fua_write.attr,
 739         &target_core_dev_attrib_emulate_fua_read.attr,
 740         &target_core_dev_attrib_emulate_write_cache.attr,
 741         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 742         &target_core_dev_attrib_emulate_tas.attr,
 743         &target_core_dev_attrib_emulate_tpu.attr,
 744         &target_core_dev_attrib_emulate_tpws.attr,
 745         &target_core_dev_attrib_enforce_pr_isids.attr,
 746         &target_core_dev_attrib_is_nonrot.attr,
 747         &target_core_dev_attrib_emulate_rest_reord.attr,
 748         &target_core_dev_attrib_hw_block_size.attr,
 749         &target_core_dev_attrib_block_size.attr,
 750         &target_core_dev_attrib_hw_max_sectors.attr,
 751         &target_core_dev_attrib_max_sectors.attr,
 752         &target_core_dev_attrib_optimal_sectors.attr,
 753         &target_core_dev_attrib_hw_queue_depth.attr,
 754         &target_core_dev_attrib_queue_depth.attr,
 755         &target_core_dev_attrib_task_timeout.attr,
 756         &target_core_dev_attrib_max_unmap_lba_count.attr,
 757         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 758         &target_core_dev_attrib_unmap_granularity.attr,
 759         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 760         NULL,
 761 };
 762
 763 static struct configfs_item_operations target_core_dev_attrib_ops = {
 764         .show_attribute         = target_core_dev_attrib_attr_show,
 765         .store_attribute        = target_core_dev_attrib_attr_store,
 766 };
 767
 768 static struct config_item_type target_core_dev_attrib_cit = {
 769         .ct_item_ops            = &target_core_dev_attrib_ops,
 770         .ct_attrs               = target_core_dev_attrib_attrs,
 771         .ct_owner               = THIS_MODULE,
 772 };
 773
 774 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 775
 776 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 777
 778 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 779 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 780 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 781                 __CONFIGFS_EATTR(_name, _mode,                          \
 782                 target_core_dev_wwn_show_attr_##_name,                  \
 783                 target_core_dev_wwn_store_attr_##_name);
 784
 785 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 786 do {                                                                    \
 787         static struct target_core_dev_wwn_attribute                     \
 788                         target_core_dev_wwn_##_name =                   \
 789                 __CONFIGFS_EATTR_RO(_name,                              \
 790                 target_core_dev_wwn_show_attr_##_name);                 \
 791 } while (0);
 792
 793 /*
 794  * VPD page 0x80 Unit serial
 795  */
 796 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 797         struct t10_wwn *t10_wwn,
 798         char *page)
 799 {
 800         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 801         struct se_device *dev;
 802
 803         dev = se_dev->se_dev_ptr;
 804         if (!dev)
 805                 return -ENODEV;
 806
 807         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 808                 &t10_wwn->unit_serial[0]);
 809 }
 810
 811 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 812         struct t10_wwn *t10_wwn,
 813         const char *page,
 814         size_t count)
 815 {
 816         struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
 817         struct se_device *dev;
 818         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 819
 820         /*
 821          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 822          * from the struct scsi_device level firmware, do not allow
 823          * VPD Unit Serial to be emulated.
 824          *
 825          * Note this struct scsi_device could also be emulating VPD
 826          * information from its drivers/scsi LLD.  But for now we assume
 827          * it is doing 'the right thing' wrt a world wide unique
 828          * VPD Unit Serial Number that OS dependent multipath can depend on.
 829          */
 830         if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
 831                 pr_err("Underlying SCSI device firmware provided VPD"
 832                         " Unit Serial, ignoring request\n");
 833                 return -EOPNOTSUPP;
 834         }
 835
 836         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 837                 pr_err("Emulated VPD Unit Serial exceeds"
 838                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 839                 return -EOVERFLOW;
 840         }
 841         /*
 842          * Check to see if any active $FABRIC_MOD exports exist.  If they
 843          * do exist, fail here as changing this information on the fly
 844          * (underneath the initiator side OS dependent multipath code)
 845          * could cause negative effects.
 846          */
 847         dev = su_dev->se_dev_ptr;
 848         if (dev) {
 849                 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
 850                         pr_err("Unable to set VPD Unit Serial while"
 851                                 " active %d $FABRIC_MOD exports exist\n",
 852                                 atomic_read(&dev->dev_export_obj.obj_access_count));
 853                         return -EINVAL;
 854                 }
 855         }
 856         /*
 857          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 858          *
 859          * Also, strip any newline added from the userspace
 860          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 861          */
 862         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 863         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 864         snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 865                         "%s", strstrip(buf));
 866         su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
 867
 868         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 869                         " %s\n", su_dev->t10_wwn.unit_serial);
 870
 871         return count;
 872 }
 873
 874 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 875
 876 /*
 877  * VPD page 0x83 Protocol Identifier
 878  */
 879 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 880         struct t10_wwn *t10_wwn,
 881         char *page)
 882 {
 883         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 884         struct se_device *dev;
 885         struct t10_vpd *vpd;
 886         unsigned char buf[VPD_TMP_BUF_SIZE];
 887         ssize_t len = 0;
 888
 889         dev = se_dev->se_dev_ptr;
 890         if (!dev)
 891                 return -ENODEV;
 892
 893         memset(buf, 0, VPD_TMP_BUF_SIZE);
 894
 895         spin_lock(&t10_wwn->t10_vpd_lock);
 896         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 897                 if (!vpd->protocol_identifier_set)
 898                         continue;
 899
 900                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 901
 902                 if (len + strlen(buf) >= PAGE_SIZE)
 903                         break;
 904
 905                 len += sprintf(page+len, "%s", buf);
 906         }
 907         spin_unlock(&t10_wwn->t10_vpd_lock);
 908
 909         return len;
 910 }
 911
 912 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 913         struct t10_wwn *t10_wwn,
 914         const char *page,
 915         size_t count)
 916 {
 917         return -ENOSYS;
 918 }
 919
 920 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 921
 922 /*
 923  * Generic wrapper for dumping VPD identifiers by association.
 924  */
 925 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 926 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 927         struct t10_wwn *t10_wwn,                                        \
 928         char *page)                                                     \
 929 {                                                                       \
 930         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;         \
 931         struct se_device *dev;                                          \
 932         struct t10_vpd *vpd;                                                    \
 933         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 934         ssize_t len = 0;                                                \
 935                                                                         \
 936         dev = se_dev->se_dev_ptr;                                       \
 937         if (!dev)                                                       \
 938                 return -ENODEV;                                         \
 939                                                                         \
 940         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 941         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 942                 if (vpd->association != _assoc)                         \
 943                         continue;                                       \
 944                                                                         \
 945                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 946                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 947                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 948                         break;                                          \
 949                 len += sprintf(page+len, "%s", buf);                    \
 950                                                                         \
 951                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 952                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 953                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 954                         break;                                          \
 955                 len += sprintf(page+len, "%s", buf);                    \
 956                                                                         \
 957                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 958                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 959                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 960                         break;                                          \
 961                 len += sprintf(page+len, "%s", buf);                    \
 962         }                                                               \
 963         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 964                                                                         \
 965         return len;                                                     \
 966 }
 967
 968 /*
 969  * VPD page 0x83 Association: Logical Unit
 970  */
 971 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 972
 973 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 974         struct t10_wwn *t10_wwn,
 975         const char *page,
 976         size_t count)
 977 {
 978         return -ENOSYS;
 979 }
 980
 981 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 982
 983 /*
 984  * VPD page 0x83 Association: Target Port
 985  */
 986 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 987
 988 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 989         struct t10_wwn *t10_wwn,
 990         const char *page,
 991         size_t count)
 992 {
 993         return -ENOSYS;
 994 }
 995
 996 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 997
 998 /*
 999  * VPD page 0x83 Association: SCSI Target Device
1000  */
1001 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1002
1003 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1004         struct t10_wwn *t10_wwn,
1005         const char *page,
1006         size_t count)
1007 {
1008         return -ENOSYS;
1009 }
1010
1011 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1012
1013 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1014
1015 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1016         &target_core_dev_wwn_vpd_unit_serial.attr,
1017         &target_core_dev_wwn_vpd_protocol_identifier.attr,
1018         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1019         &target_core_dev_wwn_vpd_assoc_target_port.attr,
1020         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1021         NULL,
1022 };
1023
1024 static struct configfs_item_operations target_core_dev_wwn_ops = {
1025         .show_attribute         = target_core_dev_wwn_attr_show,
1026         .store_attribute        = target_core_dev_wwn_attr_store,
1027 };
1028
1029 static struct config_item_type target_core_dev_wwn_cit = {
1030         .ct_item_ops            = &target_core_dev_wwn_ops,
1031         .ct_attrs               = target_core_dev_wwn_attrs,
1032         .ct_owner               = THIS_MODULE,
1033 };
1034
1035 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1036
1037 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
1038
1039 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1040 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1041 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1042         __CONFIGFS_EATTR(_name, _mode,                                  \
1043         target_core_dev_pr_show_attr_##_name,                           \
1044         target_core_dev_pr_store_attr_##_name);
1045
1046 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1047 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1048         __CONFIGFS_EATTR_RO(_name,                                      \
1049         target_core_dev_pr_show_attr_##_name);
1050
1051 /*
1052  * res_holder
1053  */
1054 static ssize_t target_core_dev_pr_show_spc3_res(
1055         struct se_device *dev,
1056         char *page,
1057         ssize_t *len)
1058 {
1059         struct se_node_acl *se_nacl;
1060         struct t10_pr_registration *pr_reg;
1061         char i_buf[PR_REG_ISID_ID_LEN];
1062         int prf_isid;
1063
1064         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1065
1066         spin_lock(&dev->dev_reservation_lock);
1067         pr_reg = dev->dev_pr_res_holder;
1068         if (!pr_reg) {
1069                 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1070                 spin_unlock(&dev->dev_reservation_lock);
1071                 return *len;
1072         }
1073         se_nacl = pr_reg->pr_reg_nacl;
1074         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1075                                 PR_REG_ISID_ID_LEN);
1076
1077         *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1078                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1079                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1080         spin_unlock(&dev->dev_reservation_lock);
1081
1082         return *len;
1083 }
1084
1085 static ssize_t target_core_dev_pr_show_spc2_res(
1086         struct se_device *dev,
1087         char *page,
1088         ssize_t *len)
1089 {
1090         struct se_node_acl *se_nacl;
1091
1092         spin_lock(&dev->dev_reservation_lock);
1093         se_nacl = dev->dev_reserved_node_acl;
1094         if (!se_nacl) {
1095                 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1096                 spin_unlock(&dev->dev_reservation_lock);
1097                 return *len;
1098         }
1099         *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1100                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1101                 se_nacl->initiatorname);
1102         spin_unlock(&dev->dev_reservation_lock);
1103
1104         return *len;
1105 }
1106
1107 static ssize_t target_core_dev_pr_show_attr_res_holder(
1108         struct se_subsystem_dev *su_dev,
1109         char *page)
1110 {
1111         ssize_t len = 0;
1112
1113         if (!su_dev->se_dev_ptr)
1114                 return -ENODEV;
1115
1116         switch (su_dev->t10_pr.res_type) {
1117         case SPC3_PERSISTENT_RESERVATIONS:
1118                 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1119                                 page, &len);
1120                 break;
1121         case SPC2_RESERVATIONS:
1122                 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1123                                 page, &len);
1124                 break;
1125         case SPC_PASSTHROUGH:
1126                 len += sprintf(page+len, "Passthrough\n");
1127                 break;
1128         default:
1129                 len += sprintf(page+len, "Unknown\n");
1130                 break;
1131         }
1132
1133         return len;
1134 }
1135
1136 SE_DEV_PR_ATTR_RO(res_holder);
1137
1138 /*
1139  * res_pr_all_tgt_pts
1140  */
1141 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1142         struct se_subsystem_dev *su_dev,
1143         char *page)
1144 {
1145         struct se_device *dev;
1146         struct t10_pr_registration *pr_reg;
1147         ssize_t len = 0;
1148
1149         dev = su_dev->se_dev_ptr;
1150         if (!dev)
1151                 return -ENODEV;
1152
1153         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1154                 return len;
1155
1156         spin_lock(&dev->dev_reservation_lock);
1157         pr_reg = dev->dev_pr_res_holder;
1158         if (!pr_reg) {
1159                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1160                 spin_unlock(&dev->dev_reservation_lock);
1161                 return len;
1162         }
1163         /*
1164          * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1165          * Basic PERSISTENT RESERVER OUT parameter list, page 290
1166          */
1167         if (pr_reg->pr_reg_all_tg_pt)
1168                 len = sprintf(page, "SPC-3 Reservation: All Target"
1169                         " Ports registration\n");
1170         else
1171                 len = sprintf(page, "SPC-3 Reservation: Single"
1172                         " Target Port registration\n");
1173         spin_unlock(&dev->dev_reservation_lock);
1174
1175         return len;
1176 }
1177
1178 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1179
1180 /*
1181  * res_pr_generation
1182  */
1183 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1184         struct se_subsystem_dev *su_dev,
1185         char *page)
1186 {
1187         if (!su_dev->se_dev_ptr)
1188                 return -ENODEV;
1189
1190         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1191                 return 0;
1192
1193         return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1194 }
1195
1196 SE_DEV_PR_ATTR_RO(res_pr_generation);
1197
1198 /*
1199  * res_pr_holder_tg_port
1200  */
1201 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1202         struct se_subsystem_dev *su_dev,
1203         char *page)
1204 {
1205         struct se_device *dev;
1206         struct se_node_acl *se_nacl;
1207         struct se_lun *lun;
1208         struct se_portal_group *se_tpg;
1209         struct t10_pr_registration *pr_reg;
1210         struct target_core_fabric_ops *tfo;
1211         ssize_t len = 0;
1212
1213         dev = su_dev->se_dev_ptr;
1214         if (!dev)
1215                 return -ENODEV;
1216
1217         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1218                 return len;
1219
1220         spin_lock(&dev->dev_reservation_lock);
1221         pr_reg = dev->dev_pr_res_holder;
1222         if (!pr_reg) {
1223                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1224                 spin_unlock(&dev->dev_reservation_lock);
1225                 return len;
1226         }
1227         se_nacl = pr_reg->pr_reg_nacl;
1228         se_tpg = se_nacl->se_tpg;
1229         lun = pr_reg->pr_reg_tg_pt_lun;
1230         tfo = se_tpg->se_tpg_tfo;
1231
1232         len += sprintf(page+len, "SPC-3 Reservation: %s"
1233                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1234                 tfo->tpg_get_wwn(se_tpg));
1235         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1236                 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1237                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1238                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1239                 tfo->get_fabric_name(), lun->unpacked_lun);
1240         spin_unlock(&dev->dev_reservation_lock);
1241
1242         return len;
1243 }
1244
1245 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1246
1247 /*
1248  * res_pr_registered_i_pts
1249  */
1250 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1251         struct se_subsystem_dev *su_dev,
1252         char *page)
1253 {
1254         struct target_core_fabric_ops *tfo;
1255         struct t10_pr_registration *pr_reg;
1256         unsigned char buf[384];
1257         char i_buf[PR_REG_ISID_ID_LEN];
1258         ssize_t len = 0;
1259         int reg_count = 0, prf_isid;
1260
1261         if (!su_dev->se_dev_ptr)
1262                 return -ENODEV;
1263
1264         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1265                 return len;
1266
1267         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1268
1269         spin_lock(&su_dev->t10_pr.registration_lock);
1270         list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1271                         pr_reg_list) {
1272
1273                 memset(buf, 0, 384);
1274                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1275                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1276                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1277                                         PR_REG_ISID_ID_LEN);
1278                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1279                         tfo->get_fabric_name(),
1280                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1281                         &i_buf[0] : "", pr_reg->pr_res_key,
1282                         pr_reg->pr_res_generation);
1283
1284                 if (len + strlen(buf) >= PAGE_SIZE)
1285                         break;
1286
1287                 len += sprintf(page+len, "%s", buf);
1288                 reg_count++;
1289         }
1290         spin_unlock(&su_dev->t10_pr.registration_lock);
1291
1292         if (!reg_count)
1293                 len += sprintf(page+len, "None\n");
1294
1295         return len;
1296 }
1297
1298 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1299
1300 /*
1301  * res_pr_type
1302  */
1303 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1304         struct se_subsystem_dev *su_dev,
1305         char *page)
1306 {
1307         struct se_device *dev;
1308         struct t10_pr_registration *pr_reg;
1309         ssize_t len = 0;
1310
1311         dev = su_dev->se_dev_ptr;
1312         if (!dev)
1313                 return -ENODEV;
1314
1315         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1316                 return len;
1317
1318         spin_lock(&dev->dev_reservation_lock);
1319         pr_reg = dev->dev_pr_res_holder;
1320         if (!pr_reg) {
1321                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1322                 spin_unlock(&dev->dev_reservation_lock);
1323                 return len;
1324         }
1325         len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1326                 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1327         spin_unlock(&dev->dev_reservation_lock);
1328
1329         return len;
1330 }
1331
1332 SE_DEV_PR_ATTR_RO(res_pr_type);
1333
1334 /*
1335  * res_type
1336  */
1337 static ssize_t target_core_dev_pr_show_attr_res_type(
1338         struct se_subsystem_dev *su_dev,
1339         char *page)
1340 {
1341         ssize_t len = 0;
1342
1343         if (!su_dev->se_dev_ptr)
1344                 return -ENODEV;
1345
1346         switch (su_dev->t10_pr.res_type) {
1347         case SPC3_PERSISTENT_RESERVATIONS:
1348                 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1349                 break;
1350         case SPC2_RESERVATIONS:
1351                 len = sprintf(page, "SPC2_RESERVATIONS\n");
1352                 break;
1353         case SPC_PASSTHROUGH:
1354                 len = sprintf(page, "SPC_PASSTHROUGH\n");
1355                 break;
1356         default:
1357                 len = sprintf(page, "UNKNOWN\n");
1358                 break;
1359         }
1360
1361         return len;
1362 }
1363
1364 SE_DEV_PR_ATTR_RO(res_type);
1365
1366 /*
1367  * res_aptpl_active
1368  */
1369
1370 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1371         struct se_subsystem_dev *su_dev,
1372         char *page)
1373 {
1374         if (!su_dev->se_dev_ptr)
1375                 return -ENODEV;
1376
1377         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1378                 return 0;
1379
1380         return sprintf(page, "APTPL Bit Status: %s\n",
1381                 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1382 }
1383
1384 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1385
1386 /*
1387  * res_aptpl_metadata
1388  */
1389 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1390         struct se_subsystem_dev *su_dev,
1391         char *page)
1392 {
1393         if (!su_dev->se_dev_ptr)
1394                 return -ENODEV;
1395
1396         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1397                 return 0;
1398
1399         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1400 }
1401
1402 enum {
1403         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1404         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1405         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1406         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1407 };
1408
1409 static match_table_t tokens = {
1410         {Opt_initiator_fabric, "initiator_fabric=%s"},
1411         {Opt_initiator_node, "initiator_node=%s"},
1412         {Opt_initiator_sid, "initiator_sid=%s"},
1413         {Opt_sa_res_key, "sa_res_key=%s"},
1414         {Opt_res_holder, "res_holder=%d"},
1415         {Opt_res_type, "res_type=%d"},
1416         {Opt_res_scope, "res_scope=%d"},
1417         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1418         {Opt_mapped_lun, "mapped_lun=%d"},
1419         {Opt_target_fabric, "target_fabric=%s"},
1420         {Opt_target_node, "target_node=%s"},
1421         {Opt_tpgt, "tpgt=%d"},
1422         {Opt_port_rtpi, "port_rtpi=%d"},
1423         {Opt_target_lun, "target_lun=%d"},
1424         {Opt_err, NULL}
1425 };
1426
1427 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1428         struct se_subsystem_dev *su_dev,
1429         const char *page,
1430         size_t count)
1431 {
1432         struct se_device *dev;
1433         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1434         unsigned char *t_fabric = NULL, *t_port = NULL;
1435         char *orig, *ptr, *arg_p, *opts;
1436         substring_t args[MAX_OPT_ARGS];
1437         unsigned long long tmp_ll;
1438         u64 sa_res_key = 0;
1439         u32 mapped_lun = 0, target_lun = 0;
1440         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1441         u16 port_rpti = 0, tpgt = 0;
1442         u8 type = 0, scope;
1443
1444         dev = su_dev->se_dev_ptr;
1445         if (!dev)
1446                 return -ENODEV;
1447
1448         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1449                 return 0;
1450
1451         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1452                 pr_debug("Unable to process APTPL metadata while"
1453                         " active fabric exports exist\n");
1454                 return -EINVAL;
1455         }
1456
1457         opts = kstrdup(page, GFP_KERNEL);
1458         if (!opts)
1459                 return -ENOMEM;
1460
1461         orig = opts;
1462         while ((ptr = strsep(&opts, ",")) != NULL) {
1463                 if (!*ptr)
1464                         continue;
1465
1466                 token = match_token(ptr, tokens, args);
1467                 switch (token) {
1468                 case Opt_initiator_fabric:
1469                         i_fabric = match_strdup(&args[0]);
1470                         if (!i_fabric) {
1471                                 ret = -ENOMEM;
1472                                 goto out;
1473                         }
1474                         break;
1475                 case Opt_initiator_node:
1476                         i_port = match_strdup(&args[0]);
1477                         if (!i_port) {
1478                                 ret = -ENOMEM;
1479                                 goto out;
1480                         }
1481                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1482                                 pr_err("APTPL metadata initiator_node="
1483                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1484                                         PR_APTPL_MAX_IPORT_LEN);
1485                                 ret = -EINVAL;
1486                                 break;
1487                         }
1488                         break;
1489                 case Opt_initiator_sid:
1490                         isid = match_strdup(&args[0]);
1491                         if (!isid) {
1492                                 ret = -ENOMEM;
1493                                 goto out;
1494                         }
1495                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1496                                 pr_err("APTPL metadata initiator_isid"
1497                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1498                                         PR_REG_ISID_LEN);
1499                                 ret = -EINVAL;
1500                                 break;
1501                         }
1502                         break;
1503                 case Opt_sa_res_key:
1504                         arg_p = match_strdup(&args[0]);
1505                         if (!arg_p) {
1506                                 ret = -ENOMEM;
1507                                 goto out;
1508                         }
1509                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1510                         if (ret < 0) {
1511                                 pr_err("strict_strtoull() failed for"
1512                                         " sa_res_key=\n");
1513                                 goto out;
1514                         }
1515                         sa_res_key = (u64)tmp_ll;
1516                         break;
1517                 /*
1518                  * PR APTPL Metadata for Reservation
1519                  */
1520                 case Opt_res_holder:
1521                         match_int(args, &arg);
1522                         res_holder = arg;
1523                         break;
1524                 case Opt_res_type:
1525                         match_int(args, &arg);
1526                         type = (u8)arg;
1527                         break;
1528                 case Opt_res_scope:
1529                         match_int(args, &arg);
1530                         scope = (u8)arg;
1531                         break;
1532                 case Opt_res_all_tg_pt:
1533                         match_int(args, &arg);
1534                         all_tg_pt = (int)arg;
1535                         break;
1536                 case Opt_mapped_lun:
1537                         match_int(args, &arg);
1538                         mapped_lun = (u32)arg;
1539                         break;
1540                 /*
1541                  * PR APTPL Metadata for Target Port
1542                  */
1543                 case Opt_target_fabric:
1544                         t_fabric = match_strdup(&args[0]);
1545                         if (!t_fabric) {
1546                                 ret = -ENOMEM;
1547                                 goto out;
1548                         }
1549                         break;
1550                 case Opt_target_node:
1551                         t_port = match_strdup(&args[0]);
1552                         if (!t_port) {
1553                                 ret = -ENOMEM;
1554                                 goto out;
1555                         }
1556                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1557                                 pr_err("APTPL metadata target_node="
1558                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1559                                         PR_APTPL_MAX_TPORT_LEN);
1560                                 ret = -EINVAL;
1561                                 break;
1562                         }
1563                         break;
1564                 case Opt_tpgt:
1565                         match_int(args, &arg);
1566                         tpgt = (u16)arg;
1567                         break;
1568                 case Opt_port_rtpi:
1569                         match_int(args, &arg);
1570                         port_rpti = (u16)arg;
1571                         break;
1572                 case Opt_target_lun:
1573                         match_int(args, &arg);
1574                         target_lun = (u32)arg;
1575                         break;
1576                 default:
1577                         break;
1578                 }
1579         }
1580
1581         if (!i_port || !t_port || !sa_res_key) {
1582                 pr_err("Illegal parameters for APTPL registration\n");
1583                 ret = -EINVAL;
1584                 goto out;
1585         }
1586
1587         if (res_holder && !(type)) {
1588                 pr_err("Illegal PR type: 0x%02x for reservation"
1589                                 " holder\n", type);
1590                 ret = -EINVAL;
1591                 goto out;
1592         }
1593
1594         ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1595                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1596                         res_holder, all_tg_pt, type);
1597 out:
1598         kfree(i_fabric);
1599         kfree(i_port);
1600         kfree(isid);
1601         kfree(t_fabric);
1602         kfree(t_port);
1603         kfree(orig);
1604         return (ret == 0) ? count : ret;
1605 }
1606
1607 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1608
1609 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1610
1611 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1612         &target_core_dev_pr_res_holder.attr,
1613         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1614         &target_core_dev_pr_res_pr_generation.attr,
1615         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1616         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1617         &target_core_dev_pr_res_pr_type.attr,
1618         &target_core_dev_pr_res_type.attr,
1619         &target_core_dev_pr_res_aptpl_active.attr,
1620         &target_core_dev_pr_res_aptpl_metadata.attr,
1621         NULL,
1622 };
1623
1624 static struct configfs_item_operations target_core_dev_pr_ops = {
1625         .show_attribute         = target_core_dev_pr_attr_show,
1626         .store_attribute        = target_core_dev_pr_attr_store,
1627 };
1628
1629 static struct config_item_type target_core_dev_pr_cit = {
1630         .ct_item_ops            = &target_core_dev_pr_ops,
1631         .ct_attrs               = target_core_dev_pr_attrs,
1632         .ct_owner               = THIS_MODULE,
1633 };
1634
1635 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1636
1637 /*  Start functions for struct config_item_type target_core_dev_cit */
1638
1639 static ssize_t target_core_show_dev_info(void *p, char *page)
1640 {
1641         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1642         struct se_hba *hba = se_dev->se_dev_hba;
1643         struct se_subsystem_api *t = hba->transport;
1644         int bl = 0;
1645         ssize_t read_bytes = 0;
1646
1647         if (!se_dev->se_dev_ptr)
1648                 return -ENODEV;
1649
1650         transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1651         read_bytes += bl;
1652         read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1653         return read_bytes;
1654 }
1655
1656 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1657         .attr   = { .ca_owner = THIS_MODULE,
1658                     .ca_name = "info",
1659                     .ca_mode = S_IRUGO },
1660         .show   = target_core_show_dev_info,
1661         .store  = NULL,
1662 };
1663
1664 static ssize_t target_core_store_dev_control(
1665         void *p,
1666         const char *page,
1667         size_t count)
1668 {
1669         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1670         struct se_hba *hba = se_dev->se_dev_hba;
1671         struct se_subsystem_api *t = hba->transport;
1672
1673         if (!se_dev->se_dev_su_ptr) {
1674                 pr_err("Unable to locate struct se_subsystem_dev>se"
1675                                 "_dev_su_ptr\n");
1676                 return -EINVAL;
1677         }
1678
1679         return t->set_configfs_dev_params(hba, se_dev, page, count);
1680 }
1681
1682 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1683         .attr   = { .ca_owner = THIS_MODULE,
1684                     .ca_name = "control",
1685                     .ca_mode = S_IWUSR },
1686         .show   = NULL,
1687         .store  = target_core_store_dev_control,
1688 };
1689
1690 static ssize_t target_core_show_dev_alias(void *p, char *page)
1691 {
1692         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1693
1694         if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1695                 return 0;
1696
1697         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1698 }
1699
1700 static ssize_t target_core_store_dev_alias(
1701         void *p,
1702         const char *page,
1703         size_t count)
1704 {
1705         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1706         struct se_hba *hba = se_dev->se_dev_hba;
1707         ssize_t read_bytes;
1708
1709         if (count > (SE_DEV_ALIAS_LEN-1)) {
1710                 pr_err("alias count: %d exceeds"
1711                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1712                         SE_DEV_ALIAS_LEN-1);
1713                 return -EINVAL;
1714         }
1715
1716         se_dev->su_dev_flags |= SDF_USING_ALIAS;
1717         read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1718                         "%s", page);
1719
1720         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1721                 config_item_name(&hba->hba_group.cg_item),
1722                 config_item_name(&se_dev->se_dev_group.cg_item),
1723                 se_dev->se_dev_alias);
1724
1725         return read_bytes;
1726 }
1727
1728 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1729         .attr   = { .ca_owner = THIS_MODULE,
1730                     .ca_name = "alias",
1731                     .ca_mode =  S_IRUGO | S_IWUSR },
1732         .show   = target_core_show_dev_alias,
1733         .store  = target_core_store_dev_alias,
1734 };
1735
1736 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1737 {
1738         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1739
1740         if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1741                 return 0;
1742
1743         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1744 }
1745
1746 static ssize_t target_core_store_dev_udev_path(
1747         void *p,
1748         const char *page,
1749         size_t count)
1750 {
1751         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1752         struct se_hba *hba = se_dev->se_dev_hba;
1753         ssize_t read_bytes;
1754
1755         if (count > (SE_UDEV_PATH_LEN-1)) {
1756                 pr_err("udev_path count: %d exceeds"
1757                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1758                         SE_UDEV_PATH_LEN-1);
1759                 return -EINVAL;
1760         }
1761
1762         se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1763         read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1764                         "%s", page);
1765
1766         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1767                 config_item_name(&hba->hba_group.cg_item),
1768                 config_item_name(&se_dev->se_dev_group.cg_item),
1769                 se_dev->se_dev_udev_path);
1770
1771         return read_bytes;
1772 }
1773
1774 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1775         .attr   = { .ca_owner = THIS_MODULE,
1776                     .ca_name = "udev_path",
1777                     .ca_mode =  S_IRUGO | S_IWUSR },
1778         .show   = target_core_show_dev_udev_path,
1779         .store  = target_core_store_dev_udev_path,
1780 };
1781
1782 static ssize_t target_core_store_dev_enable(
1783         void *p,
1784         const char *page,
1785         size_t count)
1786 {
1787         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1788         struct se_device *dev;
1789         struct se_hba *hba = se_dev->se_dev_hba;
1790         struct se_subsystem_api *t = hba->transport;
1791         char *ptr;
1792
1793         ptr = strstr(page, "1");
1794         if (!ptr) {
1795                 pr_err("For dev_enable ops, only valid value"
1796                                 " is \"1\"\n");
1797                 return -EINVAL;
1798         }
1799         if (se_dev->se_dev_ptr) {
1800                 pr_err("se_dev->se_dev_ptr already set for storage"
1801                                 " object\n");
1802                 return -EEXIST;
1803         }
1804
1805         if (t->check_configfs_dev_params(hba, se_dev) < 0)
1806                 return -EINVAL;
1807
1808         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1809         if (IS_ERR(dev))
1810                 return PTR_ERR(dev);
1811         else if (!dev)
1812                 return -EINVAL;
1813
1814         se_dev->se_dev_ptr = dev;
1815         pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1816                 " %p\n", se_dev->se_dev_ptr);
1817
1818         return count;
1819 }
1820
1821 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1822         .attr   = { .ca_owner = THIS_MODULE,
1823                     .ca_name = "enable",
1824                     .ca_mode = S_IWUSR },
1825         .show   = NULL,
1826         .store  = target_core_store_dev_enable,
1827 };
1828
1829 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1830 {
1831         struct se_device *dev;
1832         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1833         struct config_item *lu_ci;
1834         struct t10_alua_lu_gp *lu_gp;
1835         struct t10_alua_lu_gp_member *lu_gp_mem;
1836         ssize_t len = 0;
1837
1838         dev = su_dev->se_dev_ptr;
1839         if (!dev)
1840                 return -ENODEV;
1841
1842         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1843                 return len;
1844
1845         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1846         if (!lu_gp_mem) {
1847                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1848                                 " pointer\n");
1849                 return -EINVAL;
1850         }
1851
1852         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1853         lu_gp = lu_gp_mem->lu_gp;
1854         if (lu_gp) {
1855                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1856                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1857                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1858         }
1859         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1860
1861         return len;
1862 }
1863
1864 static ssize_t target_core_store_alua_lu_gp(
1865         void *p,
1866         const char *page,
1867         size_t count)
1868 {
1869         struct se_device *dev;
1870         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1871         struct se_hba *hba = su_dev->se_dev_hba;
1872         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1873         struct t10_alua_lu_gp_member *lu_gp_mem;
1874         unsigned char buf[LU_GROUP_NAME_BUF];
1875         int move = 0;
1876
1877         dev = su_dev->se_dev_ptr;
1878         if (!dev)
1879                 return -ENODEV;
1880
1881         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1882                 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1883                         config_item_name(&hba->hba_group.cg_item),
1884                         config_item_name(&su_dev->se_dev_group.cg_item));
1885                 return -EINVAL;
1886         }
1887         if (count > LU_GROUP_NAME_BUF) {
1888                 pr_err("ALUA LU Group Alias too large!\n");
1889                 return -EINVAL;
1890         }
1891         memset(buf, 0, LU_GROUP_NAME_BUF);
1892         memcpy(buf, page, count);
1893         /*
1894          * Any ALUA logical unit alias besides "NULL" means we will be
1895          * making a new group association.
1896          */
1897         if (strcmp(strstrip(buf), "NULL")) {
1898                 /*
1899                  * core_alua_get_lu_gp_by_name() will increment reference to
1900                  * struct t10_alua_lu_gp.  This reference is released with
1901                  * core_alua_get_lu_gp_by_name below().
1902                  */
1903                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1904                 if (!lu_gp_new)
1905                         return -ENODEV;
1906         }
1907         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1908         if (!lu_gp_mem) {
1909                 if (lu_gp_new)
1910                         core_alua_put_lu_gp_from_name(lu_gp_new);
1911                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1912                                 " pointer\n");
1913                 return -EINVAL;
1914         }
1915
1916         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1917         lu_gp = lu_gp_mem->lu_gp;
1918         if (lu_gp) {
1919                 /*
1920                  * Clearing an existing lu_gp association, and replacing
1921                  * with NULL
1922                  */
1923                 if (!lu_gp_new) {
1924                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1925                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1926                                 " %hu\n",
1927                                 config_item_name(&hba->hba_group.cg_item),
1928                                 config_item_name(&su_dev->se_dev_group.cg_item),
1929                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1930                                 lu_gp->lu_gp_id);
1931
1932                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1933                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1934
1935                         return count;
1936                 }
1937                 /*
1938                  * Removing existing association of lu_gp_mem with lu_gp
1939                  */
1940                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1941                 move = 1;
1942         }
1943         /*
1944          * Associate lu_gp_mem with lu_gp_new.
1945          */
1946         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1947         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1948
1949         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1950                 " core/alua/lu_gps/%s, ID: %hu\n",
1951                 (move) ? "Moving" : "Adding",
1952                 config_item_name(&hba->hba_group.cg_item),
1953                 config_item_name(&su_dev->se_dev_group.cg_item),
1954                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1955                 lu_gp_new->lu_gp_id);
1956
1957         core_alua_put_lu_gp_from_name(lu_gp_new);
1958         return count;
1959 }
1960
1961 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1962         .attr   = { .ca_owner = THIS_MODULE,
1963                     .ca_name = "alua_lu_gp",
1964                     .ca_mode = S_IRUGO | S_IWUSR },
1965         .show   = target_core_show_alua_lu_gp,
1966         .store  = target_core_store_alua_lu_gp,
1967 };
1968
1969 static struct configfs_attribute *lio_core_dev_attrs[] = {
1970         &target_core_attr_dev_info.attr,
1971         &target_core_attr_dev_control.attr,
1972         &target_core_attr_dev_alias.attr,
1973         &target_core_attr_dev_udev_path.attr,
1974         &target_core_attr_dev_enable.attr,
1975         &target_core_attr_dev_alua_lu_gp.attr,
1976         NULL,
1977 };
1978
1979 static void target_core_dev_release(struct config_item *item)
1980 {
1981         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1982                                 struct se_subsystem_dev, se_dev_group);
1983         struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1984         struct se_subsystem_api *t = hba->transport;
1985         struct config_group *dev_cg = &se_dev->se_dev_group;
1986
1987         kfree(dev_cg->default_groups);
1988         /*
1989          * This pointer will set when the storage is enabled with:
1990          *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1991          */
1992         if (se_dev->se_dev_ptr) {
1993                 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1994                         "virtual_device() for se_dev_ptr: %p\n",
1995                         se_dev->se_dev_ptr);
1996
1997                 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1998         } else {
1999                 /*
2000                  * Release struct se_subsystem_dev->se_dev_su_ptr..
2001                  */
2002                 pr_debug("Target_Core_ConfigFS: Calling t->free_"
2003                         "device() for se_dev_su_ptr: %p\n",
2004                         se_dev->se_dev_su_ptr);
2005
2006                 t->free_device(se_dev->se_dev_su_ptr);
2007         }
2008
2009         pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
2010                         "_dev_t: %p\n", se_dev);
2011         kfree(se_dev);
2012 }
2013
2014 static ssize_t target_core_dev_show(struct config_item *item,
2015                                      struct configfs_attribute *attr,
2016                                      char *page)
2017 {
2018         struct se_subsystem_dev *se_dev = container_of(
2019                         to_config_group(item), struct se_subsystem_dev,
2020                         se_dev_group);
2021         struct target_core_configfs_attribute *tc_attr = container_of(
2022                         attr, struct target_core_configfs_attribute, attr);
2023
2024         if (!tc_attr->show)
2025                 return -EINVAL;
2026
2027         return tc_attr->show(se_dev, page);
2028 }
2029
2030 static ssize_t target_core_dev_store(struct config_item *item,
2031                                       struct configfs_attribute *attr,
2032                                       const char *page, size_t count)
2033 {
2034         struct se_subsystem_dev *se_dev = container_of(
2035                         to_config_group(item), struct se_subsystem_dev,
2036                         se_dev_group);
2037         struct target_core_configfs_attribute *tc_attr = container_of(
2038                         attr, struct target_core_configfs_attribute, attr);
2039
2040         if (!tc_attr->store)
2041                 return -EINVAL;
2042
2043         return tc_attr->store(se_dev, page, count);
2044 }
2045
2046 static struct configfs_item_operations target_core_dev_item_ops = {
2047         .release                = target_core_dev_release,
2048         .show_attribute         = target_core_dev_show,
2049         .store_attribute        = target_core_dev_store,
2050 };
2051
2052 static struct config_item_type target_core_dev_cit = {
2053         .ct_item_ops            = &target_core_dev_item_ops,
2054         .ct_attrs               = lio_core_dev_attrs,
2055         .ct_owner               = THIS_MODULE,
2056 };
2057
2058 /* End functions for struct config_item_type target_core_dev_cit */
2059
2060 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2061
2062 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2063 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2064 static struct target_core_alua_lu_gp_attribute                          \
2065                         target_core_alua_lu_gp_##_name =                \
2066         __CONFIGFS_EATTR(_name, _mode,                                  \
2067         target_core_alua_lu_gp_show_attr_##_name,                       \
2068         target_core_alua_lu_gp_store_attr_##_name);
2069
2070 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2071 static struct target_core_alua_lu_gp_attribute                          \
2072                         target_core_alua_lu_gp_##_name =                \
2073         __CONFIGFS_EATTR_RO(_name,                                      \
2074         target_core_alua_lu_gp_show_attr_##_name);
2075
2076 /*
2077  * lu_gp_id
2078  */
2079 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2080         struct t10_alua_lu_gp *lu_gp,
2081         char *page)
2082 {
2083         if (!lu_gp->lu_gp_valid_id)
2084                 return 0;
2085
2086         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2087 }
2088
2089 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2090         struct t10_alua_lu_gp *lu_gp,
2091         const char *page,
2092         size_t count)
2093 {
2094         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2095         unsigned long lu_gp_id;
2096         int ret;
2097
2098         ret = strict_strtoul(page, 0, &lu_gp_id);
2099         if (ret < 0) {
2100                 pr_err("strict_strtoul() returned %d for"
2101                         " lu_gp_id\n", ret);
2102                 return -EINVAL;
2103         }
2104         if (lu_gp_id > 0x0000ffff) {
2105                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2106                         " 0x0000ffff\n", lu_gp_id);
2107                 return -EINVAL;
2108         }
2109
2110         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2111         if (ret < 0)
2112                 return -EINVAL;
2113
2114         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2115                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2116                 config_item_name(&alua_lu_gp_cg->cg_item),
2117                 lu_gp->lu_gp_id);
2118
2119         return count;
2120 }
2121
2122 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2123
2124 /*
2125  * members
2126  */
2127 static ssize_t target_core_alua_lu_gp_show_attr_members(
2128         struct t10_alua_lu_gp *lu_gp,
2129         char *page)
2130 {
2131         struct se_device *dev;
2132         struct se_hba *hba;
2133         struct se_subsystem_dev *su_dev;
2134         struct t10_alua_lu_gp_member *lu_gp_mem;
2135         ssize_t len = 0, cur_len;
2136         unsigned char buf[LU_GROUP_NAME_BUF];
2137
2138         memset(buf, 0, LU_GROUP_NAME_BUF);
2139
2140         spin_lock(&lu_gp->lu_gp_lock);
2141         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2142                 dev = lu_gp_mem->lu_gp_mem_dev;
2143                 su_dev = dev->se_sub_dev;
2144                 hba = su_dev->se_dev_hba;
2145
2146                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2147                         config_item_name(&hba->hba_group.cg_item),
2148                         config_item_name(&su_dev->se_dev_group.cg_item));
2149                 cur_len++; /* Extra byte for NULL terminator */
2150
2151                 if ((cur_len + len) > PAGE_SIZE) {
2152                         pr_warn("Ran out of lu_gp_show_attr"
2153                                 "_members buffer\n");
2154                         break;
2155                 }
2156                 memcpy(page+len, buf, cur_len);
2157                 len += cur_len;
2158         }
2159         spin_unlock(&lu_gp->lu_gp_lock);
2160
2161         return len;
2162 }
2163
2164 SE_DEV_ALUA_LU_ATTR_RO(members);
2165
2166 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2167
2168 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2169         &target_core_alua_lu_gp_lu_gp_id.attr,
2170         &target_core_alua_lu_gp_members.attr,
2171         NULL,
2172 };
2173
2174 static void target_core_alua_lu_gp_release(struct config_item *item)
2175 {
2176         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2177                         struct t10_alua_lu_gp, lu_gp_group);
2178
2179         core_alua_free_lu_gp(lu_gp);
2180 }
2181
2182 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2183         .release                = target_core_alua_lu_gp_release,
2184         .show_attribute         = target_core_alua_lu_gp_attr_show,
2185         .store_attribute        = target_core_alua_lu_gp_attr_store,
2186 };
2187
2188 static struct config_item_type target_core_alua_lu_gp_cit = {
2189         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2190         .ct_attrs               = target_core_alua_lu_gp_attrs,
2191         .ct_owner               = THIS_MODULE,
2192 };
2193
2194 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2195
2196 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2197
2198 static struct config_group *target_core_alua_create_lu_gp(
2199         struct config_group *group,
2200         const char *name)
2201 {
2202         struct t10_alua_lu_gp *lu_gp;
2203         struct config_group *alua_lu_gp_cg = NULL;
2204         struct config_item *alua_lu_gp_ci = NULL;
2205
2206         lu_gp = core_alua_allocate_lu_gp(name, 0);
2207         if (IS_ERR(lu_gp))
2208                 return NULL;
2209
2210         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2211         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2212
2213         config_group_init_type_name(alua_lu_gp_cg, name,
2214                         &target_core_alua_lu_gp_cit);
2215
2216         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2217                 " Group: core/alua/lu_gps/%s\n",
2218                 config_item_name(alua_lu_gp_ci));
2219
2220         return alua_lu_gp_cg;
2221
2222 }
2223
2224 static void target_core_alua_drop_lu_gp(
2225         struct config_group *group,
2226         struct config_item *item)
2227 {
2228         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2229                         struct t10_alua_lu_gp, lu_gp_group);
2230
2231         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2232                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2233                 config_item_name(item), lu_gp->lu_gp_id);
2234         /*
2235          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2236          * -> target_core_alua_lu_gp_release()
2237          */
2238         config_item_put(item);
2239 }
2240
2241 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2242         .make_group             = &target_core_alua_create_lu_gp,
2243         .drop_item              = &target_core_alua_drop_lu_gp,
2244 };
2245
2246 static struct config_item_type target_core_alua_lu_gps_cit = {
2247         .ct_item_ops            = NULL,
2248         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2249         .ct_owner               = THIS_MODULE,
2250 };
2251
2252 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2253
2254 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2255
2256 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2257 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2258 static struct target_core_alua_tg_pt_gp_attribute                       \
2259                         target_core_alua_tg_pt_gp_##_name =             \
2260         __CONFIGFS_EATTR(_name, _mode,                                  \
2261         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2262         target_core_alua_tg_pt_gp_store_attr_##_name);
2263
2264 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2265 static struct target_core_alua_tg_pt_gp_attribute                       \
2266                         target_core_alua_tg_pt_gp_##_name =             \
2267         __CONFIGFS_EATTR_RO(_name,                                      \
2268         target_core_alua_tg_pt_gp_show_attr_##_name);
2269
2270 /*
2271  * alua_access_state
2272  */
2273 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2274         struct t10_alua_tg_pt_gp *tg_pt_gp,
2275         char *page)
2276 {
2277         return sprintf(page, "%d\n",
2278                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2279 }
2280
2281 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2282         struct t10_alua_tg_pt_gp *tg_pt_gp,
2283         const char *page,
2284         size_t count)
2285 {
2286         struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2287         unsigned long tmp;
2288         int new_state, ret;
2289
2290         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2291                 pr_err("Unable to do implict ALUA on non valid"
2292                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2293                 return -EINVAL;
2294         }
2295
2296         ret = strict_strtoul(page, 0, &tmp);
2297         if (ret < 0) {
2298                 pr_err("Unable to extract new ALUA access state from"
2299                                 " %s\n", page);
2300                 return -EINVAL;
2301         }
2302         new_state = (int)tmp;
2303
2304         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2305                 pr_err("Unable to process implict configfs ALUA"
2306                         " transition while TPGS_IMPLICT_ALUA is diabled\n");
2307                 return -EINVAL;
2308         }
2309
2310         ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2311                                         NULL, NULL, new_state, 0);
2312         return (!ret) ? count : -EINVAL;
2313 }
2314
2315 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2316
2317 /*
2318  * alua_access_status
2319  */
2320 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2321         struct t10_alua_tg_pt_gp *tg_pt_gp,
2322         char *page)
2323 {
2324         return sprintf(page, "%s\n",
2325                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2326 }
2327
2328 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2329         struct t10_alua_tg_pt_gp *tg_pt_gp,
2330         const char *page,
2331         size_t count)
2332 {
2333         unsigned long tmp;
2334         int new_status, ret;
2335
2336         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2337                 pr_err("Unable to do set ALUA access status on non"
2338                         " valid tg_pt_gp ID: %hu\n",
2339                         tg_pt_gp->tg_pt_gp_valid_id);
2340                 return -EINVAL;
2341         }
2342
2343         ret = strict_strtoul(page, 0, &tmp);
2344         if (ret < 0) {
2345                 pr_err("Unable to extract new ALUA access status"
2346                                 " from %s\n", page);
2347                 return -EINVAL;
2348         }
2349         new_status = (int)tmp;
2350
2351         if ((new_status != ALUA_STATUS_NONE) &&
2352             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2353             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2354                 pr_err("Illegal ALUA access status: 0x%02x\n",
2355                                 new_status);
2356                 return -EINVAL;
2357         }
2358
2359         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2360         return count;
2361 }
2362
2363 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2364
2365 /*
2366  * alua_access_type
2367  */
2368 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2369         struct t10_alua_tg_pt_gp *tg_pt_gp,
2370         char *page)
2371 {
2372         return core_alua_show_access_type(tg_pt_gp, page);
2373 }
2374
2375 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2376         struct t10_alua_tg_pt_gp *tg_pt_gp,
2377         const char *page,
2378         size_t count)
2379 {
2380         return core_alua_store_access_type(tg_pt_gp, page, count);
2381 }
2382
2383 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2384
2385 /*
2386  * alua_write_metadata
2387  */
2388 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2389         struct t10_alua_tg_pt_gp *tg_pt_gp,
2390         char *page)
2391 {
2392         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2393 }
2394
2395 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2396         struct t10_alua_tg_pt_gp *tg_pt_gp,
2397         const char *page,
2398         size_t count)
2399 {
2400         unsigned long tmp;
2401         int ret;
2402
2403         ret = strict_strtoul(page, 0, &tmp);
2404         if (ret < 0) {
2405                 pr_err("Unable to extract alua_write_metadata\n");
2406                 return -EINVAL;
2407         }
2408
2409         if ((tmp != 0) && (tmp != 1)) {
2410                 pr_err("Illegal value for alua_write_metadata:"
2411                         " %lu\n", tmp);
2412                 return -EINVAL;
2413         }
2414         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2415
2416         return count;
2417 }
2418
2419 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2420
2421
2422
2423 /*
2424  * nonop_delay_msecs
2425  */
2426 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2427         struct t10_alua_tg_pt_gp *tg_pt_gp,
2428         char *page)
2429 {
2430         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2431
2432 }
2433
2434 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2435         struct t10_alua_tg_pt_gp *tg_pt_gp,
2436         const char *page,
2437         size_t count)
2438 {
2439         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2440 }
2441
2442 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2443
2444 /*
2445  * trans_delay_msecs
2446  */
2447 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2448         struct t10_alua_tg_pt_gp *tg_pt_gp,
2449         char *page)
2450 {
2451         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2452 }
2453
2454 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2455         struct t10_alua_tg_pt_gp *tg_pt_gp,
2456         const char *page,
2457         size_t count)
2458 {
2459         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2460 }
2461
2462 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2463
2464 /*
2465  * preferred
2466  */
2467
2468 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2469         struct t10_alua_tg_pt_gp *tg_pt_gp,
2470         char *page)
2471 {
2472         return core_alua_show_preferred_bit(tg_pt_gp, page);
2473 }
2474
2475 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2476         struct t10_alua_tg_pt_gp *tg_pt_gp,
2477         const char *page,
2478         size_t count)
2479 {
2480         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2481 }
2482
2483 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2484
2485 /*
2486  * tg_pt_gp_id
2487  */
2488 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2489         struct t10_alua_tg_pt_gp *tg_pt_gp,
2490         char *page)
2491 {
2492         if (!tg_pt_gp->tg_pt_gp_valid_id)
2493                 return 0;
2494
2495         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2496 }
2497
2498 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2499         struct t10_alua_tg_pt_gp *tg_pt_gp,
2500         const char *page,
2501         size_t count)
2502 {
2503         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2504         unsigned long tg_pt_gp_id;
2505         int ret;
2506
2507         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2508         if (ret < 0) {
2509                 pr_err("strict_strtoul() returned %d for"
2510                         " tg_pt_gp_id\n", ret);
2511                 return -EINVAL;
2512         }
2513         if (tg_pt_gp_id > 0x0000ffff) {
2514                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2515                         " 0x0000ffff\n", tg_pt_gp_id);
2516                 return -EINVAL;
2517         }
2518
2519         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2520         if (ret < 0)
2521                 return -EINVAL;
2522
2523         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2524                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2525                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2526                 tg_pt_gp->tg_pt_gp_id);
2527
2528         return count;
2529 }
2530
2531 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2532
2533 /*
2534  * members
2535  */
2536 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2537         struct t10_alua_tg_pt_gp *tg_pt_gp,
2538         char *page)
2539 {
2540         struct se_port *port;
2541         struct se_portal_group *tpg;
2542         struct se_lun *lun;
2543         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2544         ssize_t len = 0, cur_len;
2545         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2546
2547         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2548
2549         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2550         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2551                         tg_pt_gp_mem_list) {
2552                 port = tg_pt_gp_mem->tg_pt;
2553                 tpg = port->sep_tpg;
2554                 lun = port->sep_lun;
2555
2556                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2557                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2558                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2559                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2560                         config_item_name(&lun->lun_group.cg_item));
2561                 cur_len++; /* Extra byte for NULL terminator */
2562
2563                 if ((cur_len + len) > PAGE_SIZE) {
2564                         pr_warn("Ran out of lu_gp_show_attr"
2565                                 "_members buffer\n");
2566                         break;
2567                 }
2568                 memcpy(page+len, buf, cur_len);
2569                 len += cur_len;
2570         }
2571         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2572
2573         return len;
2574 }
2575
2576 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2577
2578 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2579                         tg_pt_gp_group);
2580
2581 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2582         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2583         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2584         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2585         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2586         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2587         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2588         &target_core_alua_tg_pt_gp_preferred.attr,
2589         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2590         &target_core_alua_tg_pt_gp_members.attr,
2591         NULL,
2592 };
2593
2594 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2595 {
2596         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2597                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2598
2599         core_alua_free_tg_pt_gp(tg_pt_gp);
2600 }
2601
2602 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2603         .release                = target_core_alua_tg_pt_gp_release,
2604         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2605         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2606 };
2607
2608 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2609         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2610         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2611         .ct_owner               = THIS_MODULE,
2612 };
2613
2614 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2615
2616 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2617
2618 static struct config_group *target_core_alua_create_tg_pt_gp(
2619         struct config_group *group,
2620         const char *name)
2621 {
2622         struct t10_alua *alua = container_of(group, struct t10_alua,
2623                                         alua_tg_pt_gps_group);
2624         struct t10_alua_tg_pt_gp *tg_pt_gp;
2625         struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2626         struct config_group *alua_tg_pt_gp_cg = NULL;
2627         struct config_item *alua_tg_pt_gp_ci = NULL;
2628
2629         tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2630         if (!tg_pt_gp)
2631                 return NULL;
2632
2633         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2634         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2635
2636         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2637                         &target_core_alua_tg_pt_gp_cit);
2638
2639         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2640                 " Group: alua/tg_pt_gps/%s\n",
2641                 config_item_name(alua_tg_pt_gp_ci));
2642
2643         return alua_tg_pt_gp_cg;
2644 }
2645
2646 static void target_core_alua_drop_tg_pt_gp(
2647         struct config_group *group,
2648         struct config_item *item)
2649 {
2650         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2651                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2652
2653         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2654                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2655                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2656         /*
2657          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2658          * -> target_core_alua_tg_pt_gp_release().
2659          */
2660         config_item_put(item);
2661 }
2662
2663 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2664         .make_group             = &target_core_alua_create_tg_pt_gp,
2665         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2666 };
2667
2668 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2669         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2670         .ct_owner               = THIS_MODULE,
2671 };
2672
2673 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2674
2675 /* Start functions for struct config_item_type target_core_alua_cit */
2676
2677 /*
2678  * target_core_alua_cit is a ConfigFS group that lives under
2679  * /sys/kernel/config/target/core/alua.  There are default groups
2680  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2681  * target_core_alua_cit in target_core_init_configfs() below.
2682  */
2683 static struct config_item_type target_core_alua_cit = {
2684         .ct_item_ops            = NULL,
2685         .ct_attrs               = NULL,
2686         .ct_owner               = THIS_MODULE,
2687 };
2688
2689 /* End functions for struct config_item_type target_core_alua_cit */
2690
2691 /* Start functions for struct config_item_type target_core_stat_cit */
2692
2693 static struct config_group *target_core_stat_mkdir(
2694         struct config_group *group,
2695         const char *name)
2696 {
2697         return ERR_PTR(-ENOSYS);
2698 }
2699
2700 static void target_core_stat_rmdir(
2701         struct config_group *group,
2702         struct config_item *item)
2703 {
2704         return;
2705 }
2706
2707 static struct configfs_group_operations target_core_stat_group_ops = {
2708         .make_group             = &target_core_stat_mkdir,
2709         .drop_item              = &target_core_stat_rmdir,
2710 };
2711
2712 static struct config_item_type target_core_stat_cit = {
2713         .ct_group_ops           = &target_core_stat_group_ops,
2714         .ct_owner               = THIS_MODULE,
2715 };
2716
2717 /* End functions for struct config_item_type target_core_stat_cit */
2718
2719 /* Start functions for struct config_item_type target_core_hba_cit */
2720
2721 static struct config_group *target_core_make_subdev(
2722         struct config_group *group,
2723         const char *name)
2724 {
2725         struct t10_alua_tg_pt_gp *tg_pt_gp;
2726         struct se_subsystem_dev *se_dev;
2727         struct se_subsystem_api *t;
2728         struct config_item *hba_ci = &group->cg_item;
2729         struct se_hba *hba = item_to_hba(hba_ci);
2730         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2731         struct config_group *dev_stat_grp = NULL;
2732         int errno = -ENOMEM, ret;
2733
2734         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2735         if (ret)
2736                 return ERR_PTR(ret);
2737         /*
2738          * Locate the struct se_subsystem_api from parent's struct se_hba.
2739          */
2740         t = hba->transport;
2741
2742         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2743         if (!se_dev) {
2744                 pr_err("Unable to allocate memory for"
2745                                 " struct se_subsystem_dev\n");
2746                 goto unlock;
2747         }
2748         INIT_LIST_HEAD(&se_dev->se_dev_node);
2749         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2750         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2751         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2752         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2753         spin_lock_init(&se_dev->t10_pr.registration_lock);
2754         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2755         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2756         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2757         spin_lock_init(&se_dev->se_dev_lock);
2758         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2759         se_dev->t10_wwn.t10_sub_dev = se_dev;
2760         se_dev->t10_alua.t10_sub_dev = se_dev;
2761         se_dev->se_dev_attrib.da_sub_dev = se_dev;
2762
2763         se_dev->se_dev_hba = hba;
2764         dev_cg = &se_dev->se_dev_group;
2765
2766         dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2767                         GFP_KERNEL);
2768         if (!dev_cg->default_groups)
2769                 goto out;
2770         /*
2771          * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2772          * for ->allocate_virtdevice()
2773          *
2774          * se_dev->se_dev_ptr will be set after ->create_virtdev()
2775          * has been called successfully in the next level up in the
2776          * configfs tree for device object's struct config_group.
2777          */
2778         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2779         if (!se_dev->se_dev_su_ptr) {
2780                 pr_err("Unable to locate subsystem dependent pointer"
2781                         " from allocate_virtdevice()\n");
2782                 goto out;
2783         }
2784         spin_lock(&se_device_lock);
2785         list_add_tail(&se_dev->se_dev_node, &se_dev_list);
2786         spin_unlock(&se_device_lock);
2787
2788         config_group_init_type_name(&se_dev->se_dev_group, name,
2789                         &target_core_dev_cit);
2790         config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2791                         &target_core_dev_attrib_cit);
2792         config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2793                         &target_core_dev_pr_cit);
2794         config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2795                         &target_core_dev_wwn_cit);
2796         config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2797                         "alua", &target_core_alua_tg_pt_gps_cit);
2798         config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2799                         "statistics", &target_core_stat_cit);
2800
2801         dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2802         dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2803         dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2804         dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2805         dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2806         dev_cg->default_groups[5] = NULL;
2807         /*
2808          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2809          */
2810         tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2811         if (!tg_pt_gp)
2812                 goto out;
2813
2814         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2815         tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2816                                 GFP_KERNEL);
2817         if (!tg_pt_gp_cg->default_groups) {
2818                 pr_err("Unable to allocate tg_pt_gp_cg->"
2819                                 "default_groups\n");
2820                 goto out;
2821         }
2822
2823         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2824                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2825         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2826         tg_pt_gp_cg->default_groups[1] = NULL;
2827         se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2828         /*
2829          * Add core/$HBA/$DEV/statistics/ default groups
2830          */
2831         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2832         dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2833                                 GFP_KERNEL);
2834         if (!dev_stat_grp->default_groups) {
2835                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2836                 goto out;
2837         }
2838         target_stat_setup_dev_default_groups(se_dev);
2839
2840         pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2841                 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2842
2843         mutex_unlock(&hba->hba_access_mutex);
2844         return &se_dev->se_dev_group;
2845 out:
2846         if (se_dev->t10_alua.default_tg_pt_gp) {
2847                 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2848                 se_dev->t10_alua.default_tg_pt_gp = NULL;
2849         }
2850         if (dev_stat_grp)
2851                 kfree(dev_stat_grp->default_groups);
2852         if (tg_pt_gp_cg)
2853                 kfree(tg_pt_gp_cg->default_groups);
2854         if (dev_cg)
2855                 kfree(dev_cg->default_groups);
2856         if (se_dev->se_dev_su_ptr)
2857                 t->free_device(se_dev->se_dev_su_ptr);
2858         kfree(se_dev);
2859 unlock:
2860         mutex_unlock(&hba->hba_access_mutex);
2861         return ERR_PTR(errno);
2862 }
2863
2864 static void target_core_drop_subdev(
2865         struct config_group *group,
2866         struct config_item *item)
2867 {
2868         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2869                                 struct se_subsystem_dev, se_dev_group);
2870         struct se_hba *hba;
2871         struct se_subsystem_api *t;
2872         struct config_item *df_item;
2873         struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2874         int i;
2875
2876         hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2877
2878         mutex_lock(&hba->hba_access_mutex);
2879         t = hba->transport;
2880
2881         spin_lock(&se_device_lock);
2882         list_del(&se_dev->se_dev_node);
2883         spin_unlock(&se_device_lock);
2884
2885         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2886         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2887                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2888                 dev_stat_grp->default_groups[i] = NULL;
2889                 config_item_put(df_item);
2890         }
2891         kfree(dev_stat_grp->default_groups);
2892
2893         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2894         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2895                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2896                 tg_pt_gp_cg->default_groups[i] = NULL;
2897                 config_item_put(df_item);
2898         }
2899         kfree(tg_pt_gp_cg->default_groups);
2900         /*
2901          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2902          * directly from target_core_alua_tg_pt_gp_release().
2903          */
2904         se_dev->t10_alua.default_tg_pt_gp = NULL;
2905
2906         dev_cg = &se_dev->se_dev_group;
2907         for (i = 0; dev_cg->default_groups[i]; i++) {
2908                 df_item = &dev_cg->default_groups[i]->cg_item;
2909                 dev_cg->default_groups[i] = NULL;
2910                 config_item_put(df_item);
2911         }
2912         /*
2913          * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2914          * from target_core_dev_item_ops->release() ->target_core_dev_release().
2915          */
2916         config_item_put(item);
2917         mutex_unlock(&hba->hba_access_mutex);
2918 }
2919
2920 static struct configfs_group_operations target_core_hba_group_ops = {
2921         .make_group             = target_core_make_subdev,
2922         .drop_item              = target_core_drop_subdev,
2923 };
2924
2925 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2926 #define SE_HBA_ATTR(_name, _mode)                               \
2927 static struct target_core_hba_attribute                         \
2928                 target_core_hba_##_name =                       \
2929                 __CONFIGFS_EATTR(_name, _mode,                  \
2930                 target_core_hba_show_attr_##_name,              \
2931                 target_core_hba_store_attr_##_name);
2932
2933 #define SE_HBA_ATTR_RO(_name)                                   \
2934 static struct target_core_hba_attribute                         \
2935                 target_core_hba_##_name =                       \
2936                 __CONFIGFS_EATTR_RO(_name,                      \
2937                 target_core_hba_show_attr_##_name);
2938
2939 static ssize_t target_core_hba_show_attr_hba_info(
2940         struct se_hba *hba,
2941         char *page)
2942 {
2943         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2944                         hba->hba_id, hba->transport->name,
2945                         TARGET_CORE_CONFIGFS_VERSION);
2946 }
2947
2948 SE_HBA_ATTR_RO(hba_info);
2949
2950 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2951                                 char *page)
2952 {
2953         int hba_mode = 0;
2954
2955         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2956                 hba_mode = 1;
2957
2958         return sprintf(page, "%d\n", hba_mode);
2959 }
2960
2961 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2962                                 const char *page, size_t count)
2963 {
2964         struct se_subsystem_api *transport = hba->transport;
2965         unsigned long mode_flag;
2966         int ret;
2967
2968         if (transport->pmode_enable_hba == NULL)
2969                 return -EINVAL;
2970
2971         ret = strict_strtoul(page, 0, &mode_flag);
2972         if (ret < 0) {
2973                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2974                 return -EINVAL;
2975         }
2976
2977         spin_lock(&hba->device_lock);
2978         if (!list_empty(&hba->hba_dev_list)) {
2979                 pr_err("Unable to set hba_mode with active devices\n");
2980                 spin_unlock(&hba->device_lock);
2981                 return -EINVAL;
2982         }
2983         spin_unlock(&hba->device_lock);
2984
2985         ret = transport->pmode_enable_hba(hba, mode_flag);
2986         if (ret < 0)
2987                 return -EINVAL;
2988         if (ret > 0)
2989                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2990         else if (ret == 0)
2991                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2992
2993         return count;
2994 }
2995
2996 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2997
2998 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2999
3000 static void target_core_hba_release(struct config_item *item)
3001 {
3002         struct se_hba *hba = container_of(to_config_group(item),
3003                                 struct se_hba, hba_group);
3004         core_delete_hba(hba);
3005 }
3006
3007 static struct configfs_attribute *target_core_hba_attrs[] = {
3008         &target_core_hba_hba_info.attr,
3009         &target_core_hba_hba_mode.attr,
3010         NULL,
3011 };
3012
3013 static struct configfs_item_operations target_core_hba_item_ops = {
3014         .release                = target_core_hba_release,
3015         .show_attribute         = target_core_hba_attr_show,
3016         .store_attribute        = target_core_hba_attr_store,
3017 };
3018
3019 static struct config_item_type target_core_hba_cit = {
3020         .ct_item_ops            = &target_core_hba_item_ops,
3021         .ct_group_ops           = &target_core_hba_group_ops,
3022         .ct_attrs               = target_core_hba_attrs,
3023         .ct_owner               = THIS_MODULE,
3024 };
3025
3026 static struct config_group *target_core_call_addhbatotarget(
3027         struct config_group *group,
3028         const char *name)
3029 {
3030         char *se_plugin_str, *str, *str2;
3031         struct se_hba *hba;
3032         char buf[TARGET_CORE_NAME_MAX_LEN];
3033         unsigned long plugin_dep_id = 0;
3034         int ret;
3035
3036         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3037         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3038                 pr_err("Passed *name strlen(): %d exceeds"
3039                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3040                         TARGET_CORE_NAME_MAX_LEN);
3041                 return ERR_PTR(-ENAMETOOLONG);
3042         }
3043         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3044
3045         str = strstr(buf, "_");
3046         if (!str) {
3047                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3048                 return ERR_PTR(-EINVAL);
3049         }
3050         se_plugin_str = buf;
3051         /*
3052          * Special case for subsystem plugins that have "_" in their names.
3053          * Namely rd_direct and rd_mcp..
3054          */
3055         str2 = strstr(str+1, "_");
3056         if (str2) {
3057                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3058                 str2++; /* Skip to start of plugin dependent ID */
3059                 str = str2;
3060         } else {
3061                 *str = '\0'; /* Terminate for *se_plugin_str */
3062                 str++; /* Skip to start of plugin dependent ID */
3063         }
3064
3065         ret = strict_strtoul(str, 0, &plugin_dep_id);
3066         if (ret < 0) {
3067                 pr_err("strict_strtoul() returned %d for"
3068                                 " plugin_dep_id\n", ret);
3069                 return ERR_PTR(-EINVAL);
3070         }
3071         /*
3072          * Load up TCM subsystem plugins if they have not already been loaded.
3073          */
3074         transport_subsystem_check_init();
3075
3076         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3077         if (IS_ERR(hba))
3078                 return ERR_CAST(hba);
3079
3080         config_group_init_type_name(&hba->hba_group, name,
3081                         &target_core_hba_cit);
3082
3083         return &hba->hba_group;
3084 }
3085
3086 static void target_core_call_delhbafromtarget(
3087         struct config_group *group,
3088         struct config_item *item)
3089 {
3090         /*
3091          * core_delete_hba() is called from target_core_hba_item_ops->release()
3092          * -> target_core_hba_release()
3093          */
3094         config_item_put(item);
3095 }
3096
3097 static struct configfs_group_operations target_core_group_ops = {
3098         .make_group     = target_core_call_addhbatotarget,
3099         .drop_item      = target_core_call_delhbafromtarget,
3100 };
3101
3102 static struct config_item_type target_core_cit = {
3103         .ct_item_ops    = NULL,
3104         .ct_group_ops   = &target_core_group_ops,
3105         .ct_attrs       = NULL,
3106         .ct_owner       = THIS_MODULE,
3107 };
3108
3109 /* Stop functions for struct config_item_type target_core_hba_cit */
3110
3111 static int __init target_core_init_configfs(void)
3112 {
3113         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3114         struct config_group *lu_gp_cg = NULL;
3115         struct configfs_subsystem *subsys;
3116         struct t10_alua_lu_gp *lu_gp;
3117         int ret;
3118
3119         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3120                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3121                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3122
3123         subsys = target_core_subsystem[0];
3124         config_group_init(&subsys->su_group);
3125         mutex_init(&subsys->su_mutex);
3126
3127         INIT_LIST_HEAD(&g_tf_list);
3128         mutex_init(&g_tf_lock);
3129         ret = init_se_kmem_caches();
3130         if (ret < 0)
3131                 return ret;
3132         /*
3133          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3134          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3135          */
3136         target_cg = &subsys->su_group;
3137         target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3138                                 GFP_KERNEL);
3139         if (!target_cg->default_groups) {
3140                 pr_err("Unable to allocate target_cg->default_groups\n");
3141                 goto out_global;
3142         }
3143
3144         config_group_init_type_name(&target_core_hbagroup,
3145                         "core", &target_core_cit);
3146         target_cg->default_groups[0] = &target_core_hbagroup;
3147         target_cg->default_groups[1] = NULL;
3148         /*
3149          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3150          */
3151         hba_cg = &target_core_hbagroup;
3152         hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3153                                 GFP_KERNEL);
3154         if (!hba_cg->default_groups) {
3155                 pr_err("Unable to allocate hba_cg->default_groups\n");
3156                 goto out_global;
3157         }
3158         config_group_init_type_name(&alua_group,
3159                         "alua", &target_core_alua_cit);
3160         hba_cg->default_groups[0] = &alua_group;
3161         hba_cg->default_groups[1] = NULL;
3162         /*
3163          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3164          * groups under /sys/kernel/config/target/core/alua/
3165          */
3166         alua_cg = &alua_group;
3167         alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3168                         GFP_KERNEL);
3169         if (!alua_cg->default_groups) {
3170                 pr_err("Unable to allocate alua_cg->default_groups\n");
3171                 goto out_global;
3172         }
3173
3174         config_group_init_type_name(&alua_lu_gps_group,
3175                         "lu_gps", &target_core_alua_lu_gps_cit);
3176         alua_cg->default_groups[0] = &alua_lu_gps_group;
3177         alua_cg->default_groups[1] = NULL;
3178         /*
3179          * Add core/alua/lu_gps/default_lu_gp
3180          */
3181         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3182         if (IS_ERR(lu_gp))
3183                 goto out_global;
3184
3185         lu_gp_cg = &alua_lu_gps_group;
3186         lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3187                         GFP_KERNEL);
3188         if (!lu_gp_cg->default_groups) {
3189                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3190                 goto out_global;
3191         }
3192
3193         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3194                                 &target_core_alua_lu_gp_cit);
3195         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3196         lu_gp_cg->default_groups[1] = NULL;
3197         default_lu_gp = lu_gp;
3198         /*
3199          * Register the target_core_mod subsystem with configfs.
3200          */
3201         ret = configfs_register_subsystem(subsys);
3202         if (ret < 0) {
3203                 pr_err("Error %d while registering subsystem %s\n",
3204                         ret, subsys->su_group.cg_item.ci_namebuf);
3205                 goto out_global;
3206         }
3207         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3208                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3209                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3210         /*
3211          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3212          */
3213         ret = rd_module_init();
3214         if (ret < 0)
3215                 goto out;
3216
3217         if (core_dev_setup_virtual_lun0() < 0)
3218                 goto out;
3219
3220         return 0;
3221
3222 out:
3223         configfs_unregister_subsystem(subsys);
3224         core_dev_release_virtual_lun0();
3225         rd_module_exit();
3226 out_global:
3227         if (default_lu_gp) {
3228                 core_alua_free_lu_gp(default_lu_gp);
3229                 default_lu_gp = NULL;
3230         }
3231         if (lu_gp_cg)
3232                 kfree(lu_gp_cg->default_groups);
3233         if (alua_cg)
3234                 kfree(alua_cg->default_groups);
3235         if (hba_cg)
3236                 kfree(hba_cg->default_groups);
3237         kfree(target_cg->default_groups);
3238         release_se_kmem_caches();
3239         return ret;
3240 }
3241
3242 static void __exit target_core_exit_configfs(void)
3243 {
3244         struct configfs_subsystem *subsys;
3245         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3246         struct config_item *item;
3247         int i;
3248
3249         subsys = target_core_subsystem[0];
3250
3251         lu_gp_cg = &alua_lu_gps_group;
3252         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3253                 item = &lu_gp_cg->default_groups[i]->cg_item;
3254                 lu_gp_cg->default_groups[i] = NULL;
3255                 config_item_put(item);
3256         }
3257         kfree(lu_gp_cg->default_groups);
3258         lu_gp_cg->default_groups = NULL;
3259
3260         alua_cg = &alua_group;
3261         for (i = 0; alua_cg->default_groups[i]; i++) {
3262                 item = &alua_cg->default_groups[i]->cg_item;
3263                 alua_cg->default_groups[i] = NULL;
3264                 config_item_put(item);
3265         }
3266         kfree(alua_cg->default_groups);
3267         alua_cg->default_groups = NULL;
3268
3269         hba_cg = &target_core_hbagroup;
3270         for (i = 0; hba_cg->default_groups[i]; i++) {
3271                 item = &hba_cg->default_groups[i]->cg_item;
3272                 hba_cg->default_groups[i] = NULL;
3273                 config_item_put(item);
3274         }
3275         kfree(hba_cg->default_groups);
3276         hba_cg->default_groups = NULL;
3277         /*
3278          * We expect subsys->su_group.default_groups to be released
3279          * by configfs subsystem provider logic..
3280          */
3281         configfs_unregister_subsystem(subsys);
3282         kfree(subsys->su_group.default_groups);
3283
3284         core_alua_free_lu_gp(default_lu_gp);
3285         default_lu_gp = NULL;
3286
3287         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3288                         " Infrastructure\n");
3289
3290         core_dev_release_virtual_lun0();
3291         rd_module_exit();
3292         release_se_kmem_caches();
3293 }
3294
3295 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3296 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3297 MODULE_LICENSE("GPL");
3298
3299 module_init(target_core_init_configfs);
3300 module_exit(target_core_exit_configfs);