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  * (c) Copyright 2008-2013 Datera, Inc.
   7  *
   8  * Nicholas A. Bellinger <nab@kernel.org>
   9  *
  10  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <generated/utsrelease.h>
  26 #include <linux/utsname.h>
  27 #include <linux/init.h>
  28 #include <linux/fs.h>
  29 #include <linux/namei.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/delay.h>
  33 #include <linux/unistd.h>
  34 #include <linux/string.h>
  35 #include <linux/parser.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38 #include <linux/spinlock.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_backend.h>
  42 #include <target/target_core_fabric.h>
  43 #include <target/target_core_fabric_configfs.h>
  44 #include <target/target_core_configfs.h>
  45 #include <target/configfs_macros.h>
  46
  47 #include "target_core_internal.h"
  48 #include "target_core_alua.h"
  49 #include "target_core_pr.h"
  50 #include "target_core_rd.h"
  51 #include "target_core_xcopy.h"
  52
  53 extern struct t10_alua_lu_gp *default_lu_gp;
  54
  55 static LIST_HEAD(g_tf_list);
  56 static DEFINE_MUTEX(g_tf_lock);
  57
  58 struct target_core_configfs_attribute {
  59         struct configfs_attribute attr;
  60         ssize_t (*show)(void *, char *);
  61         ssize_t (*store)(void *, const char *, size_t);
  62 };
  63
  64 static struct config_group target_core_hbagroup;
  65 static struct config_group alua_group;
  66 static struct config_group alua_lu_gps_group;
  67
  68 static inline struct se_hba *
  69 item_to_hba(struct config_item *item)
  70 {
  71         return container_of(to_config_group(item), struct se_hba, hba_group);
  72 }
  73
  74 /*
  75  * Attributes for /sys/kernel/config/target/
  76  */
  77 static ssize_t target_core_attr_show(struct config_item *item,
  78                                       struct configfs_attribute *attr,
  79                                       char *page)
  80 {
  81         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  82                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  83                 utsname()->sysname, utsname()->machine);
  84 }
  85
  86 static struct configfs_item_operations target_core_fabric_item_ops = {
  87         .show_attribute = target_core_attr_show,
  88 };
  89
  90 static struct configfs_attribute target_core_item_attr_version = {
  91         .ca_owner       = THIS_MODULE,
  92         .ca_name        = "version",
  93         .ca_mode        = S_IRUGO,
  94 };
  95
  96 static struct target_fabric_configfs *target_core_get_fabric(
  97         const char *name)
  98 {
  99         struct target_fabric_configfs *tf;
 100
 101         if (!name)
 102                 return NULL;
 103
 104         mutex_lock(&g_tf_lock);
 105         list_for_each_entry(tf, &g_tf_list, tf_list) {
 106                 if (!strcmp(tf->tf_name, name)) {
 107                         atomic_inc(&tf->tf_access_cnt);
 108                         mutex_unlock(&g_tf_lock);
 109                         return tf;
 110                 }
 111         }
 112         mutex_unlock(&g_tf_lock);
 113
 114         return NULL;
 115 }
 116
 117 /*
 118  * Called from struct target_core_group_ops->make_group()
 119  */
 120 static struct config_group *target_core_register_fabric(
 121         struct config_group *group,
 122         const char *name)
 123 {
 124         struct target_fabric_configfs *tf;
 125         int ret;
 126
 127         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 128                         " %s\n", group, name);
 129         /*
 130          * Below are some hardcoded request_module() calls to automatically
 131          * local fabric modules when the following is called:
 132          *
 133          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 134          *
 135          * Note that this does not limit which TCM fabric module can be
 136          * registered, but simply provids auto loading logic for modules with
 137          * mkdir(2) system calls with known TCM fabric modules.
 138          */
 139         if (!strncmp(name, "iscsi", 5)) {
 140                 /*
 141                  * Automatically load the LIO Target fabric module when the
 142                  * following is called:
 143                  *
 144                  * mkdir -p $CONFIGFS/target/iscsi
 145                  */
 146                 ret = request_module("iscsi_target_mod");
 147                 if (ret < 0) {
 148                         pr_err("request_module() failed for"
 149                                 " iscsi_target_mod.ko: %d\n", ret);
 150                         return ERR_PTR(-EINVAL);
 151                 }
 152         } else if (!strncmp(name, "loopback", 8)) {
 153                 /*
 154                  * Automatically load the tcm_loop fabric module when the
 155                  * following is called:
 156                  *
 157                  * mkdir -p $CONFIGFS/target/loopback
 158                  */
 159                 ret = request_module("tcm_loop");
 160                 if (ret < 0) {
 161                         pr_err("request_module() failed for"
 162                                 " tcm_loop.ko: %d\n", ret);
 163                         return ERR_PTR(-EINVAL);
 164                 }
 165         }
 166
 167         tf = target_core_get_fabric(name);
 168         if (!tf) {
 169                 pr_err("target_core_get_fabric() failed for %s\n",
 170                         name);
 171                 return ERR_PTR(-EINVAL);
 172         }
 173         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 174                         " %s\n", tf->tf_name);
 175         /*
 176          * On a successful target_core_get_fabric() look, the returned
 177          * struct target_fabric_configfs *tf will contain a usage reference.
 178          */
 179         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 180                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 181
 182         tf->tf_group.default_groups = tf->tf_default_groups;
 183         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 184         tf->tf_group.default_groups[1] = NULL;
 185
 186         config_group_init_type_name(&tf->tf_group, name,
 187                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 188         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 189                         &tf->tf_cit_tmpl.tfc_discovery_cit);
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 192                         " %s\n", tf->tf_group.cg_item.ci_name);
 193         /*
 194          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 195          */
 196         tf->tf_ops.tf_subsys = tf->tf_subsys;
 197         tf->tf_fabric = &tf->tf_group.cg_item;
 198         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 199                         " for %s\n", name);
 200
 201         return &tf->tf_group;
 202 }
 203
 204 /*
 205  * Called from struct target_core_group_ops->drop_item()
 206  */
 207 static void target_core_deregister_fabric(
 208         struct config_group *group,
 209         struct config_item *item)
 210 {
 211         struct target_fabric_configfs *tf = container_of(
 212                 to_config_group(item), struct target_fabric_configfs, tf_group);
 213         struct config_group *tf_group;
 214         struct config_item *df_item;
 215         int i;
 216
 217         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 218                 " tf list\n", config_item_name(item));
 219
 220         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 221                         " %s\n", tf->tf_name);
 222         atomic_dec(&tf->tf_access_cnt);
 223
 224         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 225                         " tf->tf_fabric for %s\n", tf->tf_name);
 226         tf->tf_fabric = NULL;
 227
 228         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 229                         " %s\n", config_item_name(item));
 230
 231         tf_group = &tf->tf_group;
 232         for (i = 0; tf_group->default_groups[i]; i++) {
 233                 df_item = &tf_group->default_groups[i]->cg_item;
 234                 tf_group->default_groups[i] = NULL;
 235                 config_item_put(df_item);
 236         }
 237         config_item_put(item);
 238 }
 239
 240 static struct configfs_group_operations target_core_fabric_group_ops = {
 241         .make_group     = &target_core_register_fabric,
 242         .drop_item      = &target_core_deregister_fabric,
 243 };
 244
 245 /*
 246  * All item attributes appearing in /sys/kernel/target/ appear here.
 247  */
 248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 249         &target_core_item_attr_version,
 250         NULL,
 251 };
 252
 253 /*
 254  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 255  */
 256 static struct config_item_type target_core_fabrics_item = {
 257         .ct_item_ops    = &target_core_fabric_item_ops,
 258         .ct_group_ops   = &target_core_fabric_group_ops,
 259         .ct_attrs       = target_core_fabric_item_attrs,
 260         .ct_owner       = THIS_MODULE,
 261 };
 262
 263 static struct configfs_subsystem target_core_fabrics = {
 264         .su_group = {
 265                 .cg_item = {
 266                         .ci_namebuf = "target",
 267                         .ci_type = &target_core_fabrics_item,
 268                 },
 269         },
 270 };
 271
 272 struct configfs_subsystem *target_core_subsystem[] = {
 273         &target_core_fabrics,
 274         NULL,
 275 };
 276
 277 /*##############################################################################
 278 // Start functions called by external Target Fabrics Modules
 279 //############################################################################*/
 280
 281 /*
 282  * First function called by fabric modules to:
 283  *
 284  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 285  * 2) Add struct target_fabric_configfs to g_tf_list
 286  * 3) Return struct target_fabric_configfs to fabric module to be passed
 287  *    into target_fabric_configfs_register().
 288  */
 289 struct target_fabric_configfs *target_fabric_configfs_init(
 290         struct module *fabric_mod,
 291         const char *name)
 292 {
 293         struct target_fabric_configfs *tf;
 294
 295         if (!(name)) {
 296                 pr_err("Unable to locate passed fabric name\n");
 297                 return ERR_PTR(-EINVAL);
 298         }
 299         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 300                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 301                         "_NAME_SIZE\n", name);
 302                 return ERR_PTR(-EINVAL);
 303         }
 304
 305         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 306         if (!tf)
 307                 return ERR_PTR(-ENOMEM);
 308
 309         INIT_LIST_HEAD(&tf->tf_list);
 310         atomic_set(&tf->tf_access_cnt, 0);
 311         /*
 312          * Setup the default generic struct config_item_type's (cits) in
 313          * struct target_fabric_configfs->tf_cit_tmpl
 314          */
 315         tf->tf_module = fabric_mod;
 316         target_fabric_setup_cits(tf);
 317
 318         tf->tf_subsys = target_core_subsystem[0];
 319         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 320
 321         mutex_lock(&g_tf_lock);
 322         list_add_tail(&tf->tf_list, &g_tf_list);
 323         mutex_unlock(&g_tf_lock);
 324
 325         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 326                         ">>>>>>>>>>>>>>\n");
 327         pr_debug("Initialized struct target_fabric_configfs: %p for"
 328                         " %s\n", tf, tf->tf_name);
 329         return tf;
 330 }
 331 EXPORT_SYMBOL(target_fabric_configfs_init);
 332
 333 /*
 334  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 335  */
 336 void target_fabric_configfs_free(
 337         struct target_fabric_configfs *tf)
 338 {
 339         mutex_lock(&g_tf_lock);
 340         list_del(&tf->tf_list);
 341         mutex_unlock(&g_tf_lock);
 342
 343         kfree(tf);
 344 }
 345 EXPORT_SYMBOL(target_fabric_configfs_free);
 346
 347 /*
 348  * Perform a sanity check of the passed tf->tf_ops before completing
 349  * TCM fabric module registration.
 350  */
 351 static int target_fabric_tf_ops_check(
 352         struct target_fabric_configfs *tf)
 353 {
 354         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 355
 356         if (!tfo->get_fabric_name) {
 357                 pr_err("Missing tfo->get_fabric_name()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->get_fabric_proto_ident) {
 361                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_get_wwn) {
 365                 pr_err("Missing tfo->tpg_get_wwn()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_get_tag) {
 369                 pr_err("Missing tfo->tpg_get_tag()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_get_default_depth) {
 373                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_get_pr_transport_id) {
 377                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_pr_transport_id_len) {
 381                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->tpg_check_demo_mode) {
 385                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->tpg_check_demo_mode_cache) {
 389                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->tpg_check_demo_mode_write_protect) {
 393                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->tpg_check_prod_mode_write_protect) {
 397                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->tpg_alloc_fabric_acl) {
 401                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->tpg_release_fabric_acl) {
 405                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->tpg_get_inst_index) {
 409                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->release_cmd) {
 413                 pr_err("Missing tfo->release_cmd()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->shutdown_session) {
 417                 pr_err("Missing tfo->shutdown_session()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->close_session) {
 421                 pr_err("Missing tfo->close_session()\n");
 422                 return -EINVAL;
 423         }
 424         if (!tfo->sess_get_index) {
 425                 pr_err("Missing tfo->sess_get_index()\n");
 426                 return -EINVAL;
 427         }
 428         if (!tfo->write_pending) {
 429                 pr_err("Missing tfo->write_pending()\n");
 430                 return -EINVAL;
 431         }
 432         if (!tfo->write_pending_status) {
 433                 pr_err("Missing tfo->write_pending_status()\n");
 434                 return -EINVAL;
 435         }
 436         if (!tfo->set_default_node_attributes) {
 437                 pr_err("Missing tfo->set_default_node_attributes()\n");
 438                 return -EINVAL;
 439         }
 440         if (!tfo->get_task_tag) {
 441                 pr_err("Missing tfo->get_task_tag()\n");
 442                 return -EINVAL;
 443         }
 444         if (!tfo->get_cmd_state) {
 445                 pr_err("Missing tfo->get_cmd_state()\n");
 446                 return -EINVAL;
 447         }
 448         if (!tfo->queue_data_in) {
 449                 pr_err("Missing tfo->queue_data_in()\n");
 450                 return -EINVAL;
 451         }
 452         if (!tfo->queue_status) {
 453                 pr_err("Missing tfo->queue_status()\n");
 454                 return -EINVAL;
 455         }
 456         if (!tfo->queue_tm_rsp) {
 457                 pr_err("Missing tfo->queue_tm_rsp()\n");
 458                 return -EINVAL;
 459         }
 460         if (!tfo->aborted_task) {
 461                 pr_err("Missing tfo->aborted_task()\n");
 462                 return -EINVAL;
 463         }
 464         /*
 465          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 466          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 467          * target_core_fabric_configfs.c WWN+TPG group context code.
 468          */
 469         if (!tfo->fabric_make_wwn) {
 470                 pr_err("Missing tfo->fabric_make_wwn()\n");
 471                 return -EINVAL;
 472         }
 473         if (!tfo->fabric_drop_wwn) {
 474                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 475                 return -EINVAL;
 476         }
 477         if (!tfo->fabric_make_tpg) {
 478                 pr_err("Missing tfo->fabric_make_tpg()\n");
 479                 return -EINVAL;
 480         }
 481         if (!tfo->fabric_drop_tpg) {
 482                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 483                 return -EINVAL;
 484         }
 485
 486         return 0;
 487 }
 488
 489 /*
 490  * Called 2nd from fabric module with returned parameter of
 491  * struct target_fabric_configfs * from target_fabric_configfs_init().
 492  *
 493  * Upon a successful registration, the new fabric's struct config_item is
 494  * return.  Also, a pointer to this struct is set in the passed
 495  * struct target_fabric_configfs.
 496  */
 497 int target_fabric_configfs_register(
 498         struct target_fabric_configfs *tf)
 499 {
 500         int ret;
 501
 502         if (!tf) {
 503                 pr_err("Unable to locate target_fabric_configfs"
 504                         " pointer\n");
 505                 return -EINVAL;
 506         }
 507         if (!tf->tf_subsys) {
 508                 pr_err("Unable to target struct config_subsystem"
 509                         " pointer\n");
 510                 return -EINVAL;
 511         }
 512         ret = target_fabric_tf_ops_check(tf);
 513         if (ret < 0)
 514                 return ret;
 515
 516         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 517                 ">>>>>>>>>>\n");
 518         return 0;
 519 }
 520 EXPORT_SYMBOL(target_fabric_configfs_register);
 521
 522 void target_fabric_configfs_deregister(
 523         struct target_fabric_configfs *tf)
 524 {
 525         struct configfs_subsystem *su;
 526
 527         if (!tf) {
 528                 pr_err("Unable to locate passed target_fabric_"
 529                         "configfs\n");
 530                 return;
 531         }
 532         su = tf->tf_subsys;
 533         if (!su) {
 534                 pr_err("Unable to locate passed tf->tf_subsys"
 535                         " pointer\n");
 536                 return;
 537         }
 538         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 539                         ">>>>>>>>>>>>\n");
 540         mutex_lock(&g_tf_lock);
 541         if (atomic_read(&tf->tf_access_cnt)) {
 542                 mutex_unlock(&g_tf_lock);
 543                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 544                         tf->tf_name);
 545                 BUG();
 546         }
 547         list_del(&tf->tf_list);
 548         mutex_unlock(&g_tf_lock);
 549
 550         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 551                         " %s\n", tf->tf_name);
 552         tf->tf_module = NULL;
 553         tf->tf_subsys = NULL;
 554         kfree(tf);
 555
 556         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 557                         ">>>>>\n");
 558 }
 559 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 560
 561 /*##############################################################################
 562 // Stop functions called by external Target Fabrics Modules
 563 //############################################################################*/
 564
 565 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 566
 567 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 568 static ssize_t target_core_dev_show_attr_##_name(                       \
 569         struct se_dev_attrib *da,                                       \
 570         char *page)                                                     \
 571 {                                                                       \
 572         return snprintf(page, PAGE_SIZE, "%u\n",                        \
 573                 (u32)da->da_dev->dev_attrib._name);                     \
 574 }
 575
 576 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 577 static ssize_t target_core_dev_store_attr_##_name(                      \
 578         struct se_dev_attrib *da,                                       \
 579         const char *page,                                               \
 580         size_t count)                                                   \
 581 {                                                                       \
 582         unsigned long val;                                              \
 583         int ret;                                                        \
 584                                                                         \
 585         ret = kstrtoul(page, 0, &val);                          \
 586         if (ret < 0) {                                                  \
 587                 pr_err("kstrtoul() failed with"         \
 588                         " ret: %d\n", ret);                             \
 589                 return -EINVAL;                                         \
 590         }                                                               \
 591         ret = se_dev_set_##_name(da->da_dev, (u32)val);                 \
 592                                                                         \
 593         return (!ret) ? count : -EINVAL;                                \
 594 }
 595
 596 #define DEF_DEV_ATTRIB(_name)                                           \
 597 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 598 DEF_DEV_ATTRIB_STORE(_name);
 599
 600 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 601 DEF_DEV_ATTRIB_SHOW(_name);
 602
 603 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 604 #define SE_DEV_ATTR(_name, _mode)                                       \
 605 static struct target_core_dev_attrib_attribute                          \
 606                         target_core_dev_attrib_##_name =                \
 607                 __CONFIGFS_EATTR(_name, _mode,                          \
 608                 target_core_dev_show_attr_##_name,                      \
 609                 target_core_dev_store_attr_##_name);
 610
 611 #define SE_DEV_ATTR_RO(_name);                                          \
 612 static struct target_core_dev_attrib_attribute                          \
 613                         target_core_dev_attrib_##_name =                \
 614         __CONFIGFS_EATTR_RO(_name,                                      \
 615         target_core_dev_show_attr_##_name);
 616
 617 DEF_DEV_ATTRIB(emulate_model_alias);
 618 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
 619
 620 DEF_DEV_ATTRIB(emulate_dpo);
 621 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 622
 623 DEF_DEV_ATTRIB(emulate_fua_write);
 624 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 625
 626 DEF_DEV_ATTRIB(emulate_fua_read);
 627 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 628
 629 DEF_DEV_ATTRIB(emulate_write_cache);
 630 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 631
 632 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 633 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 634
 635 DEF_DEV_ATTRIB(emulate_tas);
 636 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 637
 638 DEF_DEV_ATTRIB(emulate_tpu);
 639 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 640
 641 DEF_DEV_ATTRIB(emulate_tpws);
 642 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 643
 644 DEF_DEV_ATTRIB(emulate_caw);
 645 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
 646
 647 DEF_DEV_ATTRIB(emulate_3pc);
 648 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
 649
 650 DEF_DEV_ATTRIB(pi_prot_type);
 651 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
 652
 653 DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
 654 SE_DEV_ATTR_RO(hw_pi_prot_type);
 655
 656 DEF_DEV_ATTRIB(pi_prot_format);
 657 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
 658
 659 DEF_DEV_ATTRIB(enforce_pr_isids);
 660 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 661
 662 DEF_DEV_ATTRIB(is_nonrot);
 663 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 664
 665 DEF_DEV_ATTRIB(emulate_rest_reord);
 666 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 667
 668 DEF_DEV_ATTRIB(force_pr_aptpl);
 669 SE_DEV_ATTR(force_pr_aptpl, S_IRUGO | S_IWUSR);
 670
 671 DEF_DEV_ATTRIB_RO(hw_block_size);
 672 SE_DEV_ATTR_RO(hw_block_size);
 673
 674 DEF_DEV_ATTRIB(block_size);
 675 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 676
 677 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 678 SE_DEV_ATTR_RO(hw_max_sectors);
 679
 680 DEF_DEV_ATTRIB(fabric_max_sectors);
 681 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 682
 683 DEF_DEV_ATTRIB(optimal_sectors);
 684 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 685
 686 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 687 SE_DEV_ATTR_RO(hw_queue_depth);
 688
 689 DEF_DEV_ATTRIB(queue_depth);
 690 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 691
 692 DEF_DEV_ATTRIB(max_unmap_lba_count);
 693 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 694
 695 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 696 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 697
 698 DEF_DEV_ATTRIB(unmap_granularity);
 699 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 700
 701 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 702 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 703
 704 DEF_DEV_ATTRIB(max_write_same_len);
 705 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
 706
 707 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 708
 709 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 710         &target_core_dev_attrib_emulate_model_alias.attr,
 711         &target_core_dev_attrib_emulate_dpo.attr,
 712         &target_core_dev_attrib_emulate_fua_write.attr,
 713         &target_core_dev_attrib_emulate_fua_read.attr,
 714         &target_core_dev_attrib_emulate_write_cache.attr,
 715         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 716         &target_core_dev_attrib_emulate_tas.attr,
 717         &target_core_dev_attrib_emulate_tpu.attr,
 718         &target_core_dev_attrib_emulate_tpws.attr,
 719         &target_core_dev_attrib_emulate_caw.attr,
 720         &target_core_dev_attrib_emulate_3pc.attr,
 721         &target_core_dev_attrib_pi_prot_type.attr,
 722         &target_core_dev_attrib_hw_pi_prot_type.attr,
 723         &target_core_dev_attrib_pi_prot_format.attr,
 724         &target_core_dev_attrib_enforce_pr_isids.attr,
 725         &target_core_dev_attrib_force_pr_aptpl.attr,
 726         &target_core_dev_attrib_is_nonrot.attr,
 727         &target_core_dev_attrib_emulate_rest_reord.attr,
 728         &target_core_dev_attrib_hw_block_size.attr,
 729         &target_core_dev_attrib_block_size.attr,
 730         &target_core_dev_attrib_hw_max_sectors.attr,
 731         &target_core_dev_attrib_fabric_max_sectors.attr,
 732         &target_core_dev_attrib_optimal_sectors.attr,
 733         &target_core_dev_attrib_hw_queue_depth.attr,
 734         &target_core_dev_attrib_queue_depth.attr,
 735         &target_core_dev_attrib_max_unmap_lba_count.attr,
 736         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 737         &target_core_dev_attrib_unmap_granularity.attr,
 738         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 739         &target_core_dev_attrib_max_write_same_len.attr,
 740         NULL,
 741 };
 742
 743 static struct configfs_item_operations target_core_dev_attrib_ops = {
 744         .show_attribute         = target_core_dev_attrib_attr_show,
 745         .store_attribute        = target_core_dev_attrib_attr_store,
 746 };
 747
 748 static struct config_item_type target_core_dev_attrib_cit = {
 749         .ct_item_ops            = &target_core_dev_attrib_ops,
 750         .ct_attrs               = target_core_dev_attrib_attrs,
 751         .ct_owner               = THIS_MODULE,
 752 };
 753
 754 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 755
 756 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 757
 758 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 759 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 760 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 761                 __CONFIGFS_EATTR(_name, _mode,                          \
 762                 target_core_dev_wwn_show_attr_##_name,                  \
 763                 target_core_dev_wwn_store_attr_##_name);
 764
 765 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 766 do {                                                                    \
 767         static struct target_core_dev_wwn_attribute                     \
 768                         target_core_dev_wwn_##_name =                   \
 769                 __CONFIGFS_EATTR_RO(_name,                              \
 770                 target_core_dev_wwn_show_attr_##_name);                 \
 771 } while (0);
 772
 773 /*
 774  * VPD page 0x80 Unit serial
 775  */
 776 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 777         struct t10_wwn *t10_wwn,
 778         char *page)
 779 {
 780         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 781                 &t10_wwn->unit_serial[0]);
 782 }
 783
 784 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 785         struct t10_wwn *t10_wwn,
 786         const char *page,
 787         size_t count)
 788 {
 789         struct se_device *dev = t10_wwn->t10_dev;
 790         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 791
 792         /*
 793          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 794          * from the struct scsi_device level firmware, do not allow
 795          * VPD Unit Serial to be emulated.
 796          *
 797          * Note this struct scsi_device could also be emulating VPD
 798          * information from its drivers/scsi LLD.  But for now we assume
 799          * it is doing 'the right thing' wrt a world wide unique
 800          * VPD Unit Serial Number that OS dependent multipath can depend on.
 801          */
 802         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 803                 pr_err("Underlying SCSI device firmware provided VPD"
 804                         " Unit Serial, ignoring request\n");
 805                 return -EOPNOTSUPP;
 806         }
 807
 808         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 809                 pr_err("Emulated VPD Unit Serial exceeds"
 810                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 811                 return -EOVERFLOW;
 812         }
 813         /*
 814          * Check to see if any active $FABRIC_MOD exports exist.  If they
 815          * do exist, fail here as changing this information on the fly
 816          * (underneath the initiator side OS dependent multipath code)
 817          * could cause negative effects.
 818          */
 819         if (dev->export_count) {
 820                 pr_err("Unable to set VPD Unit Serial while"
 821                         " active %d $FABRIC_MOD exports exist\n",
 822                         dev->export_count);
 823                 return -EINVAL;
 824         }
 825
 826         /*
 827          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 828          *
 829          * Also, strip any newline added from the userspace
 830          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 831          */
 832         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 833         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 834         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 835                         "%s", strstrip(buf));
 836         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 837
 838         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 839                         " %s\n", dev->t10_wwn.unit_serial);
 840
 841         return count;
 842 }
 843
 844 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 845
 846 /*
 847  * VPD page 0x83 Protocol Identifier
 848  */
 849 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 850         struct t10_wwn *t10_wwn,
 851         char *page)
 852 {
 853         struct t10_vpd *vpd;
 854         unsigned char buf[VPD_TMP_BUF_SIZE];
 855         ssize_t len = 0;
 856
 857         memset(buf, 0, VPD_TMP_BUF_SIZE);
 858
 859         spin_lock(&t10_wwn->t10_vpd_lock);
 860         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 861                 if (!vpd->protocol_identifier_set)
 862                         continue;
 863
 864                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 865
 866                 if (len + strlen(buf) >= PAGE_SIZE)
 867                         break;
 868
 869                 len += sprintf(page+len, "%s", buf);
 870         }
 871         spin_unlock(&t10_wwn->t10_vpd_lock);
 872
 873         return len;
 874 }
 875
 876 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 877         struct t10_wwn *t10_wwn,
 878         const char *page,
 879         size_t count)
 880 {
 881         return -ENOSYS;
 882 }
 883
 884 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 885
 886 /*
 887  * Generic wrapper for dumping VPD identifiers by association.
 888  */
 889 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 890 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 891         struct t10_wwn *t10_wwn,                                        \
 892         char *page)                                                     \
 893 {                                                                       \
 894         struct t10_vpd *vpd;                                                    \
 895         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 896         ssize_t len = 0;                                                \
 897                                                                         \
 898         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 899         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 900                 if (vpd->association != _assoc)                         \
 901                         continue;                                       \
 902                                                                         \
 903                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 904                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 905                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 906                         break;                                          \
 907                 len += sprintf(page+len, "%s", buf);                    \
 908                                                                         \
 909                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 910                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 911                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 912                         break;                                          \
 913                 len += sprintf(page+len, "%s", buf);                    \
 914                                                                         \
 915                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 916                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 917                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 918                         break;                                          \
 919                 len += sprintf(page+len, "%s", buf);                    \
 920         }                                                               \
 921         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 922                                                                         \
 923         return len;                                                     \
 924 }
 925
 926 /*
 927  * VPD page 0x83 Association: Logical Unit
 928  */
 929 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 930
 931 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 932         struct t10_wwn *t10_wwn,
 933         const char *page,
 934         size_t count)
 935 {
 936         return -ENOSYS;
 937 }
 938
 939 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 940
 941 /*
 942  * VPD page 0x83 Association: Target Port
 943  */
 944 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 945
 946 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 947         struct t10_wwn *t10_wwn,
 948         const char *page,
 949         size_t count)
 950 {
 951         return -ENOSYS;
 952 }
 953
 954 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 955
 956 /*
 957  * VPD page 0x83 Association: SCSI Target Device
 958  */
 959 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 960
 961 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 962         struct t10_wwn *t10_wwn,
 963         const char *page,
 964         size_t count)
 965 {
 966         return -ENOSYS;
 967 }
 968
 969 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 970
 971 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 972
 973 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 974         &target_core_dev_wwn_vpd_unit_serial.attr,
 975         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 976         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 977         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 978         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 979         NULL,
 980 };
 981
 982 static struct configfs_item_operations target_core_dev_wwn_ops = {
 983         .show_attribute         = target_core_dev_wwn_attr_show,
 984         .store_attribute        = target_core_dev_wwn_attr_store,
 985 };
 986
 987 static struct config_item_type target_core_dev_wwn_cit = {
 988         .ct_item_ops            = &target_core_dev_wwn_ops,
 989         .ct_attrs               = target_core_dev_wwn_attrs,
 990         .ct_owner               = THIS_MODULE,
 991 };
 992
 993 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
 994
 995 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
 996
 997 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 998 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 999 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1000         __CONFIGFS_EATTR(_name, _mode,                                  \
1001         target_core_dev_pr_show_attr_##_name,                           \
1002         target_core_dev_pr_store_attr_##_name);
1003
1004 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1005 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1006         __CONFIGFS_EATTR_RO(_name,                                      \
1007         target_core_dev_pr_show_attr_##_name);
1008
1009 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1010                 char *page)
1011 {
1012         struct se_node_acl *se_nacl;
1013         struct t10_pr_registration *pr_reg;
1014         char i_buf[PR_REG_ISID_ID_LEN];
1015
1016         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1017
1018         pr_reg = dev->dev_pr_res_holder;
1019         if (!pr_reg)
1020                 return sprintf(page, "No SPC-3 Reservation holder\n");
1021
1022         se_nacl = pr_reg->pr_reg_nacl;
1023         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1024
1025         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1026                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1027                 se_nacl->initiatorname, i_buf);
1028 }
1029
1030 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1031                 char *page)
1032 {
1033         struct se_node_acl *se_nacl;
1034         ssize_t len;
1035
1036         se_nacl = dev->dev_reserved_node_acl;
1037         if (se_nacl) {
1038                 len = sprintf(page,
1039                               "SPC-2 Reservation: %s Initiator: %s\n",
1040                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1041                               se_nacl->initiatorname);
1042         } else {
1043                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1044         }
1045         return len;
1046 }
1047
1048 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1049                 char *page)
1050 {
1051         int ret;
1052
1053         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1054                 return sprintf(page, "Passthrough\n");
1055
1056         spin_lock(&dev->dev_reservation_lock);
1057         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1058                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1059         else
1060                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1061         spin_unlock(&dev->dev_reservation_lock);
1062         return ret;
1063 }
1064
1065 SE_DEV_PR_ATTR_RO(res_holder);
1066
1067 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1068                 struct se_device *dev, char *page)
1069 {
1070         ssize_t len = 0;
1071
1072         spin_lock(&dev->dev_reservation_lock);
1073         if (!dev->dev_pr_res_holder) {
1074                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1075         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1076                 len = sprintf(page, "SPC-3 Reservation: All Target"
1077                         " Ports registration\n");
1078         } else {
1079                 len = sprintf(page, "SPC-3 Reservation: Single"
1080                         " Target Port registration\n");
1081         }
1082
1083         spin_unlock(&dev->dev_reservation_lock);
1084         return len;
1085 }
1086
1087 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1088
1089 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1090                 struct se_device *dev, char *page)
1091 {
1092         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1093 }
1094
1095 SE_DEV_PR_ATTR_RO(res_pr_generation);
1096
1097 /*
1098  * res_pr_holder_tg_port
1099  */
1100 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1101                 struct se_device *dev, char *page)
1102 {
1103         struct se_node_acl *se_nacl;
1104         struct se_lun *lun;
1105         struct se_portal_group *se_tpg;
1106         struct t10_pr_registration *pr_reg;
1107         struct target_core_fabric_ops *tfo;
1108         ssize_t len = 0;
1109
1110         spin_lock(&dev->dev_reservation_lock);
1111         pr_reg = dev->dev_pr_res_holder;
1112         if (!pr_reg) {
1113                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1114                 goto out_unlock;
1115         }
1116
1117         se_nacl = pr_reg->pr_reg_nacl;
1118         se_tpg = se_nacl->se_tpg;
1119         lun = pr_reg->pr_reg_tg_pt_lun;
1120         tfo = se_tpg->se_tpg_tfo;
1121
1122         len += sprintf(page+len, "SPC-3 Reservation: %s"
1123                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1124                 tfo->tpg_get_wwn(se_tpg));
1125         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1126                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1127                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1128                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1129                 tfo->get_fabric_name(), lun->unpacked_lun);
1130
1131 out_unlock:
1132         spin_unlock(&dev->dev_reservation_lock);
1133         return len;
1134 }
1135
1136 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1137
1138 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1139                 struct se_device *dev, char *page)
1140 {
1141         struct target_core_fabric_ops *tfo;
1142         struct t10_pr_registration *pr_reg;
1143         unsigned char buf[384];
1144         char i_buf[PR_REG_ISID_ID_LEN];
1145         ssize_t len = 0;
1146         int reg_count = 0;
1147
1148         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1149
1150         spin_lock(&dev->t10_pr.registration_lock);
1151         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1152                         pr_reg_list) {
1153
1154                 memset(buf, 0, 384);
1155                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1156                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1157                 core_pr_dump_initiator_port(pr_reg, i_buf,
1158                                         PR_REG_ISID_ID_LEN);
1159                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1160                         tfo->get_fabric_name(),
1161                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1162                         pr_reg->pr_res_generation);
1163
1164                 if (len + strlen(buf) >= PAGE_SIZE)
1165                         break;
1166
1167                 len += sprintf(page+len, "%s", buf);
1168                 reg_count++;
1169         }
1170         spin_unlock(&dev->t10_pr.registration_lock);
1171
1172         if (!reg_count)
1173                 len += sprintf(page+len, "None\n");
1174
1175         return len;
1176 }
1177
1178 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1179
1180 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1181                 struct se_device *dev, char *page)
1182 {
1183         struct t10_pr_registration *pr_reg;
1184         ssize_t len = 0;
1185
1186         spin_lock(&dev->dev_reservation_lock);
1187         pr_reg = dev->dev_pr_res_holder;
1188         if (pr_reg) {
1189                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1190                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1191         } else {
1192                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1193         }
1194
1195         spin_unlock(&dev->dev_reservation_lock);
1196         return len;
1197 }
1198
1199 SE_DEV_PR_ATTR_RO(res_pr_type);
1200
1201 static ssize_t target_core_dev_pr_show_attr_res_type(
1202                 struct se_device *dev, char *page)
1203 {
1204         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1205                 return sprintf(page, "SPC_PASSTHROUGH\n");
1206         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1207                 return sprintf(page, "SPC2_RESERVATIONS\n");
1208         else
1209                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1210 }
1211
1212 SE_DEV_PR_ATTR_RO(res_type);
1213
1214 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1215                 struct se_device *dev, char *page)
1216 {
1217         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1218                 return 0;
1219
1220         return sprintf(page, "APTPL Bit Status: %s\n",
1221                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1222 }
1223
1224 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1225
1226 /*
1227  * res_aptpl_metadata
1228  */
1229 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1230                 struct se_device *dev, char *page)
1231 {
1232         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1233                 return 0;
1234
1235         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1236 }
1237
1238 enum {
1239         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1240         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1241         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1242         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1243 };
1244
1245 static match_table_t tokens = {
1246         {Opt_initiator_fabric, "initiator_fabric=%s"},
1247         {Opt_initiator_node, "initiator_node=%s"},
1248         {Opt_initiator_sid, "initiator_sid=%s"},
1249         {Opt_sa_res_key, "sa_res_key=%s"},
1250         {Opt_res_holder, "res_holder=%d"},
1251         {Opt_res_type, "res_type=%d"},
1252         {Opt_res_scope, "res_scope=%d"},
1253         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1254         {Opt_mapped_lun, "mapped_lun=%d"},
1255         {Opt_target_fabric, "target_fabric=%s"},
1256         {Opt_target_node, "target_node=%s"},
1257         {Opt_tpgt, "tpgt=%d"},
1258         {Opt_port_rtpi, "port_rtpi=%d"},
1259         {Opt_target_lun, "target_lun=%d"},
1260         {Opt_err, NULL}
1261 };
1262
1263 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1264         struct se_device *dev,
1265         const char *page,
1266         size_t count)
1267 {
1268         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1269         unsigned char *t_fabric = NULL, *t_port = NULL;
1270         char *orig, *ptr, *opts;
1271         substring_t args[MAX_OPT_ARGS];
1272         unsigned long long tmp_ll;
1273         u64 sa_res_key = 0;
1274         u32 mapped_lun = 0, target_lun = 0;
1275         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1276         u16 port_rpti = 0, tpgt = 0;
1277         u8 type = 0, scope;
1278
1279         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1280                 return 0;
1281         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1282                 return 0;
1283
1284         if (dev->export_count) {
1285                 pr_debug("Unable to process APTPL metadata while"
1286                         " active fabric exports exist\n");
1287                 return -EINVAL;
1288         }
1289
1290         opts = kstrdup(page, GFP_KERNEL);
1291         if (!opts)
1292                 return -ENOMEM;
1293
1294         orig = opts;
1295         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1296                 if (!*ptr)
1297                         continue;
1298
1299                 token = match_token(ptr, tokens, args);
1300                 switch (token) {
1301                 case Opt_initiator_fabric:
1302                         i_fabric = match_strdup(args);
1303                         if (!i_fabric) {
1304                                 ret = -ENOMEM;
1305                                 goto out;
1306                         }
1307                         break;
1308                 case Opt_initiator_node:
1309                         i_port = match_strdup(args);
1310                         if (!i_port) {
1311                                 ret = -ENOMEM;
1312                                 goto out;
1313                         }
1314                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1315                                 pr_err("APTPL metadata initiator_node="
1316                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1317                                         PR_APTPL_MAX_IPORT_LEN);
1318                                 ret = -EINVAL;
1319                                 break;
1320                         }
1321                         break;
1322                 case Opt_initiator_sid:
1323                         isid = match_strdup(args);
1324                         if (!isid) {
1325                                 ret = -ENOMEM;
1326                                 goto out;
1327                         }
1328                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1329                                 pr_err("APTPL metadata initiator_isid"
1330                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1331                                         PR_REG_ISID_LEN);
1332                                 ret = -EINVAL;
1333                                 break;
1334                         }
1335                         break;
1336                 case Opt_sa_res_key:
1337                         ret = kstrtoull(args->from, 0, &tmp_ll);
1338                         if (ret < 0) {
1339                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1340                                 goto out;
1341                         }
1342                         sa_res_key = (u64)tmp_ll;
1343                         break;
1344                 /*
1345                  * PR APTPL Metadata for Reservation
1346                  */
1347                 case Opt_res_holder:
1348                         match_int(args, &arg);
1349                         res_holder = arg;
1350                         break;
1351                 case Opt_res_type:
1352                         match_int(args, &arg);
1353                         type = (u8)arg;
1354                         break;
1355                 case Opt_res_scope:
1356                         match_int(args, &arg);
1357                         scope = (u8)arg;
1358                         break;
1359                 case Opt_res_all_tg_pt:
1360                         match_int(args, &arg);
1361                         all_tg_pt = (int)arg;
1362                         break;
1363                 case Opt_mapped_lun:
1364                         match_int(args, &arg);
1365                         mapped_lun = (u32)arg;
1366                         break;
1367                 /*
1368                  * PR APTPL Metadata for Target Port
1369                  */
1370                 case Opt_target_fabric:
1371                         t_fabric = match_strdup(args);
1372                         if (!t_fabric) {
1373                                 ret = -ENOMEM;
1374                                 goto out;
1375                         }
1376                         break;
1377                 case Opt_target_node:
1378                         t_port = match_strdup(args);
1379                         if (!t_port) {
1380                                 ret = -ENOMEM;
1381                                 goto out;
1382                         }
1383                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1384                                 pr_err("APTPL metadata target_node="
1385                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1386                                         PR_APTPL_MAX_TPORT_LEN);
1387                                 ret = -EINVAL;
1388                                 break;
1389                         }
1390                         break;
1391                 case Opt_tpgt:
1392                         match_int(args, &arg);
1393                         tpgt = (u16)arg;
1394                         break;
1395                 case Opt_port_rtpi:
1396                         match_int(args, &arg);
1397                         port_rpti = (u16)arg;
1398                         break;
1399                 case Opt_target_lun:
1400                         match_int(args, &arg);
1401                         target_lun = (u32)arg;
1402                         break;
1403                 default:
1404                         break;
1405                 }
1406         }
1407
1408         if (!i_port || !t_port || !sa_res_key) {
1409                 pr_err("Illegal parameters for APTPL registration\n");
1410                 ret = -EINVAL;
1411                 goto out;
1412         }
1413
1414         if (res_holder && !(type)) {
1415                 pr_err("Illegal PR type: 0x%02x for reservation"
1416                                 " holder\n", type);
1417                 ret = -EINVAL;
1418                 goto out;
1419         }
1420
1421         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1422                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1423                         res_holder, all_tg_pt, type);
1424 out:
1425         kfree(i_fabric);
1426         kfree(i_port);
1427         kfree(isid);
1428         kfree(t_fabric);
1429         kfree(t_port);
1430         kfree(orig);
1431         return (ret == 0) ? count : ret;
1432 }
1433
1434 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1435
1436 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1437
1438 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1439         &target_core_dev_pr_res_holder.attr,
1440         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1441         &target_core_dev_pr_res_pr_generation.attr,
1442         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1443         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1444         &target_core_dev_pr_res_pr_type.attr,
1445         &target_core_dev_pr_res_type.attr,
1446         &target_core_dev_pr_res_aptpl_active.attr,
1447         &target_core_dev_pr_res_aptpl_metadata.attr,
1448         NULL,
1449 };
1450
1451 static struct configfs_item_operations target_core_dev_pr_ops = {
1452         .show_attribute         = target_core_dev_pr_attr_show,
1453         .store_attribute        = target_core_dev_pr_attr_store,
1454 };
1455
1456 static struct config_item_type target_core_dev_pr_cit = {
1457         .ct_item_ops            = &target_core_dev_pr_ops,
1458         .ct_attrs               = target_core_dev_pr_attrs,
1459         .ct_owner               = THIS_MODULE,
1460 };
1461
1462 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1463
1464 /*  Start functions for struct config_item_type target_core_dev_cit */
1465
1466 static ssize_t target_core_show_dev_info(void *p, char *page)
1467 {
1468         struct se_device *dev = p;
1469         struct se_subsystem_api *t = dev->transport;
1470         int bl = 0;
1471         ssize_t read_bytes = 0;
1472
1473         transport_dump_dev_state(dev, page, &bl);
1474         read_bytes += bl;
1475         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1476         return read_bytes;
1477 }
1478
1479 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1480         .attr   = { .ca_owner = THIS_MODULE,
1481                     .ca_name = "info",
1482                     .ca_mode = S_IRUGO },
1483         .show   = target_core_show_dev_info,
1484         .store  = NULL,
1485 };
1486
1487 static ssize_t target_core_store_dev_control(
1488         void *p,
1489         const char *page,
1490         size_t count)
1491 {
1492         struct se_device *dev = p;
1493         struct se_subsystem_api *t = dev->transport;
1494
1495         return t->set_configfs_dev_params(dev, page, count);
1496 }
1497
1498 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1499         .attr   = { .ca_owner = THIS_MODULE,
1500                     .ca_name = "control",
1501                     .ca_mode = S_IWUSR },
1502         .show   = NULL,
1503         .store  = target_core_store_dev_control,
1504 };
1505
1506 static ssize_t target_core_show_dev_alias(void *p, char *page)
1507 {
1508         struct se_device *dev = p;
1509
1510         if (!(dev->dev_flags & DF_USING_ALIAS))
1511                 return 0;
1512
1513         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1514 }
1515
1516 static ssize_t target_core_store_dev_alias(
1517         void *p,
1518         const char *page,
1519         size_t count)
1520 {
1521         struct se_device *dev = p;
1522         struct se_hba *hba = dev->se_hba;
1523         ssize_t read_bytes;
1524
1525         if (count > (SE_DEV_ALIAS_LEN-1)) {
1526                 pr_err("alias count: %d exceeds"
1527                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1528                         SE_DEV_ALIAS_LEN-1);
1529                 return -EINVAL;
1530         }
1531
1532         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1533         if (!read_bytes)
1534                 return -EINVAL;
1535         if (dev->dev_alias[read_bytes - 1] == '\n')
1536                 dev->dev_alias[read_bytes - 1] = '\0';
1537
1538         dev->dev_flags |= DF_USING_ALIAS;
1539
1540         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1541                 config_item_name(&hba->hba_group.cg_item),
1542                 config_item_name(&dev->dev_group.cg_item),
1543                 dev->dev_alias);
1544
1545         return read_bytes;
1546 }
1547
1548 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1549         .attr   = { .ca_owner = THIS_MODULE,
1550                     .ca_name = "alias",
1551                     .ca_mode =  S_IRUGO | S_IWUSR },
1552         .show   = target_core_show_dev_alias,
1553         .store  = target_core_store_dev_alias,
1554 };
1555
1556 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1557 {
1558         struct se_device *dev = p;
1559
1560         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1561                 return 0;
1562
1563         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1564 }
1565
1566 static ssize_t target_core_store_dev_udev_path(
1567         void *p,
1568         const char *page,
1569         size_t count)
1570 {
1571         struct se_device *dev = p;
1572         struct se_hba *hba = dev->se_hba;
1573         ssize_t read_bytes;
1574
1575         if (count > (SE_UDEV_PATH_LEN-1)) {
1576                 pr_err("udev_path count: %d exceeds"
1577                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1578                         SE_UDEV_PATH_LEN-1);
1579                 return -EINVAL;
1580         }
1581
1582         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1583                         "%s", page);
1584         if (!read_bytes)
1585                 return -EINVAL;
1586         if (dev->udev_path[read_bytes - 1] == '\n')
1587                 dev->udev_path[read_bytes - 1] = '\0';
1588
1589         dev->dev_flags |= DF_USING_UDEV_PATH;
1590
1591         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1592                 config_item_name(&hba->hba_group.cg_item),
1593                 config_item_name(&dev->dev_group.cg_item),
1594                 dev->udev_path);
1595
1596         return read_bytes;
1597 }
1598
1599 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1600         .attr   = { .ca_owner = THIS_MODULE,
1601                     .ca_name = "udev_path",
1602                     .ca_mode =  S_IRUGO | S_IWUSR },
1603         .show   = target_core_show_dev_udev_path,
1604         .store  = target_core_store_dev_udev_path,
1605 };
1606
1607 static ssize_t target_core_show_dev_enable(void *p, char *page)
1608 {
1609         struct se_device *dev = p;
1610
1611         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1612 }
1613
1614 static ssize_t target_core_store_dev_enable(
1615         void *p,
1616         const char *page,
1617         size_t count)
1618 {
1619         struct se_device *dev = p;
1620         char *ptr;
1621         int ret;
1622
1623         ptr = strstr(page, "1");
1624         if (!ptr) {
1625                 pr_err("For dev_enable ops, only valid value"
1626                                 " is \"1\"\n");
1627                 return -EINVAL;
1628         }
1629
1630         ret = target_configure_device(dev);
1631         if (ret)
1632                 return ret;
1633         return count;
1634 }
1635
1636 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1637         .attr   = { .ca_owner = THIS_MODULE,
1638                     .ca_name = "enable",
1639                     .ca_mode =  S_IRUGO | S_IWUSR },
1640         .show   = target_core_show_dev_enable,
1641         .store  = target_core_store_dev_enable,
1642 };
1643
1644 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1645 {
1646         struct se_device *dev = p;
1647         struct config_item *lu_ci;
1648         struct t10_alua_lu_gp *lu_gp;
1649         struct t10_alua_lu_gp_member *lu_gp_mem;
1650         ssize_t len = 0;
1651
1652         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1653         if (!lu_gp_mem)
1654                 return 0;
1655
1656         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1657         lu_gp = lu_gp_mem->lu_gp;
1658         if (lu_gp) {
1659                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1660                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1661                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1662         }
1663         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1664
1665         return len;
1666 }
1667
1668 static ssize_t target_core_store_alua_lu_gp(
1669         void *p,
1670         const char *page,
1671         size_t count)
1672 {
1673         struct se_device *dev = p;
1674         struct se_hba *hba = dev->se_hba;
1675         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1676         struct t10_alua_lu_gp_member *lu_gp_mem;
1677         unsigned char buf[LU_GROUP_NAME_BUF];
1678         int move = 0;
1679
1680         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1681         if (!lu_gp_mem)
1682                 return 0;
1683
1684         if (count > LU_GROUP_NAME_BUF) {
1685                 pr_err("ALUA LU Group Alias too large!\n");
1686                 return -EINVAL;
1687         }
1688         memset(buf, 0, LU_GROUP_NAME_BUF);
1689         memcpy(buf, page, count);
1690         /*
1691          * Any ALUA logical unit alias besides "NULL" means we will be
1692          * making a new group association.
1693          */
1694         if (strcmp(strstrip(buf), "NULL")) {
1695                 /*
1696                  * core_alua_get_lu_gp_by_name() will increment reference to
1697                  * struct t10_alua_lu_gp.  This reference is released with
1698                  * core_alua_get_lu_gp_by_name below().
1699                  */
1700                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1701                 if (!lu_gp_new)
1702                         return -ENODEV;
1703         }
1704
1705         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1706         lu_gp = lu_gp_mem->lu_gp;
1707         if (lu_gp) {
1708                 /*
1709                  * Clearing an existing lu_gp association, and replacing
1710                  * with NULL
1711                  */
1712                 if (!lu_gp_new) {
1713                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1714                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1715                                 " %hu\n",
1716                                 config_item_name(&hba->hba_group.cg_item),
1717                                 config_item_name(&dev->dev_group.cg_item),
1718                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1719                                 lu_gp->lu_gp_id);
1720
1721                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1722                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1723
1724                         return count;
1725                 }
1726                 /*
1727                  * Removing existing association of lu_gp_mem with lu_gp
1728                  */
1729                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1730                 move = 1;
1731         }
1732         /*
1733          * Associate lu_gp_mem with lu_gp_new.
1734          */
1735         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1736         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1737
1738         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1739                 " core/alua/lu_gps/%s, ID: %hu\n",
1740                 (move) ? "Moving" : "Adding",
1741                 config_item_name(&hba->hba_group.cg_item),
1742                 config_item_name(&dev->dev_group.cg_item),
1743                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1744                 lu_gp_new->lu_gp_id);
1745
1746         core_alua_put_lu_gp_from_name(lu_gp_new);
1747         return count;
1748 }
1749
1750 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1751         .attr   = { .ca_owner = THIS_MODULE,
1752                     .ca_name = "alua_lu_gp",
1753                     .ca_mode = S_IRUGO | S_IWUSR },
1754         .show   = target_core_show_alua_lu_gp,
1755         .store  = target_core_store_alua_lu_gp,
1756 };
1757
1758 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1759 {
1760         struct se_device *dev = p;
1761         struct t10_alua_lba_map *map;
1762         struct t10_alua_lba_map_member *mem;
1763         char *b = page;
1764         int bl = 0;
1765         char state;
1766
1767         spin_lock(&dev->t10_alua.lba_map_lock);
1768         if (!list_empty(&dev->t10_alua.lba_map_list))
1769             bl += sprintf(b + bl, "%u %u\n",
1770                           dev->t10_alua.lba_map_segment_size,
1771                           dev->t10_alua.lba_map_segment_multiplier);
1772         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1773                 bl += sprintf(b + bl, "%llu %llu",
1774                               map->lba_map_first_lba, map->lba_map_last_lba);
1775                 list_for_each_entry(mem, &map->lba_map_mem_list,
1776                                     lba_map_mem_list) {
1777                         switch (mem->lba_map_mem_alua_state) {
1778                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1779                                 state = 'O';
1780                                 break;
1781                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1782                                 state = 'A';
1783                                 break;
1784                         case ALUA_ACCESS_STATE_STANDBY:
1785                                 state = 'S';
1786                                 break;
1787                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1788                                 state = 'U';
1789                                 break;
1790                         default:
1791                                 state = '.';
1792                                 break;
1793                         }
1794                         bl += sprintf(b + bl, " %d:%c",
1795                                       mem->lba_map_mem_alua_pg_id, state);
1796                 }
1797                 bl += sprintf(b + bl, "\n");
1798         }
1799         spin_unlock(&dev->t10_alua.lba_map_lock);
1800         return bl;
1801 }
1802
1803 static ssize_t target_core_store_dev_lba_map(
1804         void *p,
1805         const char *page,
1806         size_t count)
1807 {
1808         struct se_device *dev = p;
1809         struct t10_alua_lba_map *lba_map = NULL;
1810         struct list_head lba_list;
1811         char *map_entries, *ptr;
1812         char state;
1813         int pg_num = -1, pg;
1814         int ret = 0, num = 0, pg_id, alua_state;
1815         unsigned long start_lba = -1, end_lba = -1;
1816         unsigned long segment_size = -1, segment_mult = -1;
1817
1818         map_entries = kstrdup(page, GFP_KERNEL);
1819         if (!map_entries)
1820                 return -ENOMEM;
1821
1822         INIT_LIST_HEAD(&lba_list);
1823         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1824                 if (!*ptr)
1825                         continue;
1826
1827                 if (num == 0) {
1828                         if (sscanf(ptr, "%lu %lu\n",
1829                                    &segment_size, &segment_mult) != 2) {
1830                                 pr_err("Invalid line %d\n", num);
1831                                 ret = -EINVAL;
1832                                 break;
1833                         }
1834                         num++;
1835                         continue;
1836                 }
1837                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1838                         pr_err("Invalid line %d\n", num);
1839                         ret = -EINVAL;
1840                         break;
1841                 }
1842                 ptr = strchr(ptr, ' ');
1843                 if (!ptr) {
1844                         pr_err("Invalid line %d, missing end lba\n", num);
1845                         ret = -EINVAL;
1846                         break;
1847                 }
1848                 ptr++;
1849                 ptr = strchr(ptr, ' ');
1850                 if (!ptr) {
1851                         pr_err("Invalid line %d, missing state definitions\n",
1852                                num);
1853                         ret = -EINVAL;
1854                         break;
1855                 }
1856                 ptr++;
1857                 lba_map = core_alua_allocate_lba_map(&lba_list,
1858                                                      start_lba, end_lba);
1859                 if (IS_ERR(lba_map)) {
1860                         ret = PTR_ERR(lba_map);
1861                         break;
1862                 }
1863                 pg = 0;
1864                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1865                         switch (state) {
1866                         case 'O':
1867                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1868                                 break;
1869                         case 'A':
1870                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1871                                 break;
1872                         case 'S':
1873                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1874                                 break;
1875                         case 'U':
1876                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1877                                 break;
1878                         default:
1879                                 pr_err("Invalid ALUA state '%c'\n", state);
1880                                 ret = -EINVAL;
1881                                 goto out;
1882                         }
1883
1884                         ret = core_alua_allocate_lba_map_mem(lba_map,
1885                                                              pg_id, alua_state);
1886                         if (ret) {
1887                                 pr_err("Invalid target descriptor %d:%c "
1888                                        "at line %d\n",
1889                                        pg_id, state, num);
1890                                 break;
1891                         }
1892                         pg++;
1893                         ptr = strchr(ptr, ' ');
1894                         if (ptr)
1895                                 ptr++;
1896                         else
1897                                 break;
1898                 }
1899                 if (pg_num == -1)
1900                     pg_num = pg;
1901                 else if (pg != pg_num) {
1902                         pr_err("Only %d from %d port groups definitions "
1903                                "at line %d\n", pg, pg_num, num);
1904                         ret = -EINVAL;
1905                         break;
1906                 }
1907                 num++;
1908         }
1909 out:
1910         if (ret) {
1911                 core_alua_free_lba_map(&lba_list);
1912                 count = ret;
1913         } else
1914                 core_alua_set_lba_map(dev, &lba_list,
1915                                       segment_size, segment_mult);
1916         kfree(map_entries);
1917         return count;
1918 }
1919
1920 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1921         .attr   = { .ca_owner = THIS_MODULE,
1922                     .ca_name = "lba_map",
1923                     .ca_mode = S_IRUGO | S_IWUSR },
1924         .show   = target_core_show_dev_lba_map,
1925         .store  = target_core_store_dev_lba_map,
1926 };
1927
1928 static struct configfs_attribute *lio_core_dev_attrs[] = {
1929         &target_core_attr_dev_info.attr,
1930         &target_core_attr_dev_control.attr,
1931         &target_core_attr_dev_alias.attr,
1932         &target_core_attr_dev_udev_path.attr,
1933         &target_core_attr_dev_enable.attr,
1934         &target_core_attr_dev_alua_lu_gp.attr,
1935         &target_core_attr_dev_lba_map.attr,
1936         NULL,
1937 };
1938
1939 static void target_core_dev_release(struct config_item *item)
1940 {
1941         struct config_group *dev_cg = to_config_group(item);
1942         struct se_device *dev =
1943                 container_of(dev_cg, struct se_device, dev_group);
1944
1945         kfree(dev_cg->default_groups);
1946         target_free_device(dev);
1947 }
1948
1949 static ssize_t target_core_dev_show(struct config_item *item,
1950                                      struct configfs_attribute *attr,
1951                                      char *page)
1952 {
1953         struct config_group *dev_cg = to_config_group(item);
1954         struct se_device *dev =
1955                 container_of(dev_cg, struct se_device, dev_group);
1956         struct target_core_configfs_attribute *tc_attr = container_of(
1957                         attr, struct target_core_configfs_attribute, attr);
1958
1959         if (!tc_attr->show)
1960                 return -EINVAL;
1961
1962         return tc_attr->show(dev, page);
1963 }
1964
1965 static ssize_t target_core_dev_store(struct config_item *item,
1966                                       struct configfs_attribute *attr,
1967                                       const char *page, size_t count)
1968 {
1969         struct config_group *dev_cg = to_config_group(item);
1970         struct se_device *dev =
1971                 container_of(dev_cg, struct se_device, dev_group);
1972         struct target_core_configfs_attribute *tc_attr = container_of(
1973                         attr, struct target_core_configfs_attribute, attr);
1974
1975         if (!tc_attr->store)
1976                 return -EINVAL;
1977
1978         return tc_attr->store(dev, page, count);
1979 }
1980
1981 static struct configfs_item_operations target_core_dev_item_ops = {
1982         .release                = target_core_dev_release,
1983         .show_attribute         = target_core_dev_show,
1984         .store_attribute        = target_core_dev_store,
1985 };
1986
1987 static struct config_item_type target_core_dev_cit = {
1988         .ct_item_ops            = &target_core_dev_item_ops,
1989         .ct_attrs               = lio_core_dev_attrs,
1990         .ct_owner               = THIS_MODULE,
1991 };
1992
1993 /* End functions for struct config_item_type target_core_dev_cit */
1994
1995 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1996
1997 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1998 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1999 static struct target_core_alua_lu_gp_attribute                          \
2000                         target_core_alua_lu_gp_##_name =                \
2001         __CONFIGFS_EATTR(_name, _mode,                                  \
2002         target_core_alua_lu_gp_show_attr_##_name,                       \
2003         target_core_alua_lu_gp_store_attr_##_name);
2004
2005 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2006 static struct target_core_alua_lu_gp_attribute                          \
2007                         target_core_alua_lu_gp_##_name =                \
2008         __CONFIGFS_EATTR_RO(_name,                                      \
2009         target_core_alua_lu_gp_show_attr_##_name);
2010
2011 /*
2012  * lu_gp_id
2013  */
2014 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2015         struct t10_alua_lu_gp *lu_gp,
2016         char *page)
2017 {
2018         if (!lu_gp->lu_gp_valid_id)
2019                 return 0;
2020
2021         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2022 }
2023
2024 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2025         struct t10_alua_lu_gp *lu_gp,
2026         const char *page,
2027         size_t count)
2028 {
2029         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2030         unsigned long lu_gp_id;
2031         int ret;
2032
2033         ret = kstrtoul(page, 0, &lu_gp_id);
2034         if (ret < 0) {
2035                 pr_err("kstrtoul() returned %d for"
2036                         " lu_gp_id\n", ret);
2037                 return ret;
2038         }
2039         if (lu_gp_id > 0x0000ffff) {
2040                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2041                         " 0x0000ffff\n", lu_gp_id);
2042                 return -EINVAL;
2043         }
2044
2045         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2046         if (ret < 0)
2047                 return -EINVAL;
2048
2049         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2050                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2051                 config_item_name(&alua_lu_gp_cg->cg_item),
2052                 lu_gp->lu_gp_id);
2053
2054         return count;
2055 }
2056
2057 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2058
2059 /*
2060  * members
2061  */
2062 static ssize_t target_core_alua_lu_gp_show_attr_members(
2063         struct t10_alua_lu_gp *lu_gp,
2064         char *page)
2065 {
2066         struct se_device *dev;
2067         struct se_hba *hba;
2068         struct t10_alua_lu_gp_member *lu_gp_mem;
2069         ssize_t len = 0, cur_len;
2070         unsigned char buf[LU_GROUP_NAME_BUF];
2071
2072         memset(buf, 0, LU_GROUP_NAME_BUF);
2073
2074         spin_lock(&lu_gp->lu_gp_lock);
2075         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2076                 dev = lu_gp_mem->lu_gp_mem_dev;
2077                 hba = dev->se_hba;
2078
2079                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2080                         config_item_name(&hba->hba_group.cg_item),
2081                         config_item_name(&dev->dev_group.cg_item));
2082                 cur_len++; /* Extra byte for NULL terminator */
2083
2084                 if ((cur_len + len) > PAGE_SIZE) {
2085                         pr_warn("Ran out of lu_gp_show_attr"
2086                                 "_members buffer\n");
2087                         break;
2088                 }
2089                 memcpy(page+len, buf, cur_len);
2090                 len += cur_len;
2091         }
2092         spin_unlock(&lu_gp->lu_gp_lock);
2093
2094         return len;
2095 }
2096
2097 SE_DEV_ALUA_LU_ATTR_RO(members);
2098
2099 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2100
2101 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2102         &target_core_alua_lu_gp_lu_gp_id.attr,
2103         &target_core_alua_lu_gp_members.attr,
2104         NULL,
2105 };
2106
2107 static void target_core_alua_lu_gp_release(struct config_item *item)
2108 {
2109         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2110                         struct t10_alua_lu_gp, lu_gp_group);
2111
2112         core_alua_free_lu_gp(lu_gp);
2113 }
2114
2115 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2116         .release                = target_core_alua_lu_gp_release,
2117         .show_attribute         = target_core_alua_lu_gp_attr_show,
2118         .store_attribute        = target_core_alua_lu_gp_attr_store,
2119 };
2120
2121 static struct config_item_type target_core_alua_lu_gp_cit = {
2122         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2123         .ct_attrs               = target_core_alua_lu_gp_attrs,
2124         .ct_owner               = THIS_MODULE,
2125 };
2126
2127 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2128
2129 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2130
2131 static struct config_group *target_core_alua_create_lu_gp(
2132         struct config_group *group,
2133         const char *name)
2134 {
2135         struct t10_alua_lu_gp *lu_gp;
2136         struct config_group *alua_lu_gp_cg = NULL;
2137         struct config_item *alua_lu_gp_ci = NULL;
2138
2139         lu_gp = core_alua_allocate_lu_gp(name, 0);
2140         if (IS_ERR(lu_gp))
2141                 return NULL;
2142
2143         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2144         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2145
2146         config_group_init_type_name(alua_lu_gp_cg, name,
2147                         &target_core_alua_lu_gp_cit);
2148
2149         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2150                 " Group: core/alua/lu_gps/%s\n",
2151                 config_item_name(alua_lu_gp_ci));
2152
2153         return alua_lu_gp_cg;
2154
2155 }
2156
2157 static void target_core_alua_drop_lu_gp(
2158         struct config_group *group,
2159         struct config_item *item)
2160 {
2161         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2162                         struct t10_alua_lu_gp, lu_gp_group);
2163
2164         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2165                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2166                 config_item_name(item), lu_gp->lu_gp_id);
2167         /*
2168          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2169          * -> target_core_alua_lu_gp_release()
2170          */
2171         config_item_put(item);
2172 }
2173
2174 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2175         .make_group             = &target_core_alua_create_lu_gp,
2176         .drop_item              = &target_core_alua_drop_lu_gp,
2177 };
2178
2179 static struct config_item_type target_core_alua_lu_gps_cit = {
2180         .ct_item_ops            = NULL,
2181         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2182         .ct_owner               = THIS_MODULE,
2183 };
2184
2185 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2186
2187 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2188
2189 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2190 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2191 static struct target_core_alua_tg_pt_gp_attribute                       \
2192                         target_core_alua_tg_pt_gp_##_name =             \
2193         __CONFIGFS_EATTR(_name, _mode,                                  \
2194         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2195         target_core_alua_tg_pt_gp_store_attr_##_name);
2196
2197 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2198 static struct target_core_alua_tg_pt_gp_attribute                       \
2199                         target_core_alua_tg_pt_gp_##_name =             \
2200         __CONFIGFS_EATTR_RO(_name,                                      \
2201         target_core_alua_tg_pt_gp_show_attr_##_name);
2202
2203 /*
2204  * alua_access_state
2205  */
2206 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2207         struct t10_alua_tg_pt_gp *tg_pt_gp,
2208         char *page)
2209 {
2210         return sprintf(page, "%d\n",
2211                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2212 }
2213
2214 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2215         struct t10_alua_tg_pt_gp *tg_pt_gp,
2216         const char *page,
2217         size_t count)
2218 {
2219         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2220         unsigned long tmp;
2221         int new_state, ret;
2222
2223         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2224                 pr_err("Unable to do implicit ALUA on non valid"
2225                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2226                 return -EINVAL;
2227         }
2228         if (!(dev->dev_flags & DF_CONFIGURED)) {
2229                 pr_err("Unable to set alua_access_state while device is"
2230                        " not configured\n");
2231                 return -ENODEV;
2232         }
2233
2234         ret = kstrtoul(page, 0, &tmp);
2235         if (ret < 0) {
2236                 pr_err("Unable to extract new ALUA access state from"
2237                                 " %s\n", page);
2238                 return ret;
2239         }
2240         new_state = (int)tmp;
2241
2242         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2243                 pr_err("Unable to process implicit configfs ALUA"
2244                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2245                 return -EINVAL;
2246         }
2247         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2248             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2249                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2250                 pr_err("Unable to process implicit configfs ALUA transition"
2251                        " while explicit ALUA management is enabled\n");
2252                 return -EINVAL;
2253         }
2254
2255         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2256                                         NULL, NULL, new_state, 0);
2257         return (!ret) ? count : -EINVAL;
2258 }
2259
2260 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2261
2262 /*
2263  * alua_access_status
2264  */
2265 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2266         struct t10_alua_tg_pt_gp *tg_pt_gp,
2267         char *page)
2268 {
2269         return sprintf(page, "%s\n",
2270                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2271 }
2272
2273 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2274         struct t10_alua_tg_pt_gp *tg_pt_gp,
2275         const char *page,
2276         size_t count)
2277 {
2278         unsigned long tmp;
2279         int new_status, ret;
2280
2281         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2282                 pr_err("Unable to do set ALUA access status on non"
2283                         " valid tg_pt_gp ID: %hu\n",
2284                         tg_pt_gp->tg_pt_gp_valid_id);
2285                 return -EINVAL;
2286         }
2287
2288         ret = kstrtoul(page, 0, &tmp);
2289         if (ret < 0) {
2290                 pr_err("Unable to extract new ALUA access status"
2291                                 " from %s\n", page);
2292                 return ret;
2293         }
2294         new_status = (int)tmp;
2295
2296         if ((new_status != ALUA_STATUS_NONE) &&
2297             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2298             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2299                 pr_err("Illegal ALUA access status: 0x%02x\n",
2300                                 new_status);
2301                 return -EINVAL;
2302         }
2303
2304         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2305         return count;
2306 }
2307
2308 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2309
2310 /*
2311  * alua_access_type
2312  */
2313 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2314         struct t10_alua_tg_pt_gp *tg_pt_gp,
2315         char *page)
2316 {
2317         return core_alua_show_access_type(tg_pt_gp, page);
2318 }
2319
2320 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2321         struct t10_alua_tg_pt_gp *tg_pt_gp,
2322         const char *page,
2323         size_t count)
2324 {
2325         return core_alua_store_access_type(tg_pt_gp, page, count);
2326 }
2327
2328 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2329
2330 /*
2331  * alua_supported_states
2332  */
2333
2334 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2335 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2336         struct t10_alua_tg_pt_gp *t, char *p)                           \
2337 {                                                                       \
2338         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2339 }
2340
2341 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2342 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2343         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2344 {                                                                       \
2345         unsigned long tmp;                                              \
2346         int ret;                                                        \
2347                                                                         \
2348         if (!t->tg_pt_gp_valid_id) {                                    \
2349                 pr_err("Unable to do set ##_name ALUA state on non"     \
2350                        " valid tg_pt_gp ID: %hu\n",                     \
2351                        t->tg_pt_gp_valid_id);                           \
2352                 return -EINVAL;                                         \
2353         }                                                               \
2354                                                                         \
2355         ret = kstrtoul(p, 0, &tmp);                                     \
2356         if (ret < 0) {                                                  \
2357                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2358                 return -EINVAL;                                         \
2359         }                                                               \
2360         if (tmp > 1) {                                                  \
2361                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2362                 return -EINVAL;                                         \
2363         }                                                               \
2364         if (tmp)                                                        \
2365                 t->_var |= _bit;                                        \
2366         else                                                            \
2367                 t->_var &= ~_bit;                                       \
2368                                                                         \
2369         return c;                                                       \
2370 }
2371
2372 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2373                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2374 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2375                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2376 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2377
2378 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2379                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2380 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2381                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2382 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2383
2384 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2385                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2386 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2387                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2388 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2389
2390 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2391                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2392 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2393                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2394 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2395
2396 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2397                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2398 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2399                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2400 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2401
2402 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2403                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2404 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2405                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2406 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2407
2408 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2409                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2410 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2411                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2412 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2413
2414 /*
2415  * alua_write_metadata
2416  */
2417 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2418         struct t10_alua_tg_pt_gp *tg_pt_gp,
2419         char *page)
2420 {
2421         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2422 }
2423
2424 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2425         struct t10_alua_tg_pt_gp *tg_pt_gp,
2426         const char *page,
2427         size_t count)
2428 {
2429         unsigned long tmp;
2430         int ret;
2431
2432         ret = kstrtoul(page, 0, &tmp);
2433         if (ret < 0) {
2434                 pr_err("Unable to extract alua_write_metadata\n");
2435                 return ret;
2436         }
2437
2438         if ((tmp != 0) && (tmp != 1)) {
2439                 pr_err("Illegal value for alua_write_metadata:"
2440                         " %lu\n", tmp);
2441                 return -EINVAL;
2442         }
2443         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2444
2445         return count;
2446 }
2447
2448 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2449
2450
2451
2452 /*
2453  * nonop_delay_msecs
2454  */
2455 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2456         struct t10_alua_tg_pt_gp *tg_pt_gp,
2457         char *page)
2458 {
2459         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2460
2461 }
2462
2463 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2464         struct t10_alua_tg_pt_gp *tg_pt_gp,
2465         const char *page,
2466         size_t count)
2467 {
2468         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2469 }
2470
2471 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2472
2473 /*
2474  * trans_delay_msecs
2475  */
2476 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2477         struct t10_alua_tg_pt_gp *tg_pt_gp,
2478         char *page)
2479 {
2480         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2481 }
2482
2483 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2484         struct t10_alua_tg_pt_gp *tg_pt_gp,
2485         const char *page,
2486         size_t count)
2487 {
2488         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2489 }
2490
2491 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2492
2493 /*
2494  * implicit_trans_secs
2495  */
2496 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2497         struct t10_alua_tg_pt_gp *tg_pt_gp,
2498         char *page)
2499 {
2500         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2501 }
2502
2503 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2504         struct t10_alua_tg_pt_gp *tg_pt_gp,
2505         const char *page,
2506         size_t count)
2507 {
2508         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2509 }
2510
2511 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2512
2513 /*
2514  * preferred
2515  */
2516
2517 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2518         struct t10_alua_tg_pt_gp *tg_pt_gp,
2519         char *page)
2520 {
2521         return core_alua_show_preferred_bit(tg_pt_gp, page);
2522 }
2523
2524 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2525         struct t10_alua_tg_pt_gp *tg_pt_gp,
2526         const char *page,
2527         size_t count)
2528 {
2529         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2530 }
2531
2532 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2533
2534 /*
2535  * tg_pt_gp_id
2536  */
2537 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2538         struct t10_alua_tg_pt_gp *tg_pt_gp,
2539         char *page)
2540 {
2541         if (!tg_pt_gp->tg_pt_gp_valid_id)
2542                 return 0;
2543
2544         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2545 }
2546
2547 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2548         struct t10_alua_tg_pt_gp *tg_pt_gp,
2549         const char *page,
2550         size_t count)
2551 {
2552         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2553         unsigned long tg_pt_gp_id;
2554         int ret;
2555
2556         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2557         if (ret < 0) {
2558                 pr_err("kstrtoul() returned %d for"
2559                         " tg_pt_gp_id\n", ret);
2560                 return ret;
2561         }
2562         if (tg_pt_gp_id > 0x0000ffff) {
2563                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2564                         " 0x0000ffff\n", tg_pt_gp_id);
2565                 return -EINVAL;
2566         }
2567
2568         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2569         if (ret < 0)
2570                 return -EINVAL;
2571
2572         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2573                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2574                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2575                 tg_pt_gp->tg_pt_gp_id);
2576
2577         return count;
2578 }
2579
2580 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2581
2582 /*
2583  * members
2584  */
2585 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2586         struct t10_alua_tg_pt_gp *tg_pt_gp,
2587         char *page)
2588 {
2589         struct se_port *port;
2590         struct se_portal_group *tpg;
2591         struct se_lun *lun;
2592         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2593         ssize_t len = 0, cur_len;
2594         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2595
2596         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2597
2598         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2599         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2600                         tg_pt_gp_mem_list) {
2601                 port = tg_pt_gp_mem->tg_pt;
2602                 tpg = port->sep_tpg;
2603                 lun = port->sep_lun;
2604
2605                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2606                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2607                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2608                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2609                         config_item_name(&lun->lun_group.cg_item));
2610                 cur_len++; /* Extra byte for NULL terminator */
2611
2612                 if ((cur_len + len) > PAGE_SIZE) {
2613                         pr_warn("Ran out of lu_gp_show_attr"
2614                                 "_members buffer\n");
2615                         break;
2616                 }
2617                 memcpy(page+len, buf, cur_len);
2618                 len += cur_len;
2619         }
2620         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2621
2622         return len;
2623 }
2624
2625 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2626
2627 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2628                         tg_pt_gp_group);
2629
2630 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2631         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2632         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2633         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2634         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2635         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2636         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2637         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2638         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2639         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2640         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2641         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2642         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2643         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2644         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2645         &target_core_alua_tg_pt_gp_preferred.attr,
2646         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2647         &target_core_alua_tg_pt_gp_members.attr,
2648         NULL,
2649 };
2650
2651 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2652 {
2653         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2654                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2655
2656         core_alua_free_tg_pt_gp(tg_pt_gp);
2657 }
2658
2659 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2660         .release                = target_core_alua_tg_pt_gp_release,
2661         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2662         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2663 };
2664
2665 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2666         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2667         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2668         .ct_owner               = THIS_MODULE,
2669 };
2670
2671 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2672
2673 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2674
2675 static struct config_group *target_core_alua_create_tg_pt_gp(
2676         struct config_group *group,
2677         const char *name)
2678 {
2679         struct t10_alua *alua = container_of(group, struct t10_alua,
2680                                         alua_tg_pt_gps_group);
2681         struct t10_alua_tg_pt_gp *tg_pt_gp;
2682         struct config_group *alua_tg_pt_gp_cg = NULL;
2683         struct config_item *alua_tg_pt_gp_ci = NULL;
2684
2685         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2686         if (!tg_pt_gp)
2687                 return NULL;
2688
2689         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2690         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2691
2692         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2693                         &target_core_alua_tg_pt_gp_cit);
2694
2695         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2696                 " Group: alua/tg_pt_gps/%s\n",
2697                 config_item_name(alua_tg_pt_gp_ci));
2698
2699         return alua_tg_pt_gp_cg;
2700 }
2701
2702 static void target_core_alua_drop_tg_pt_gp(
2703         struct config_group *group,
2704         struct config_item *item)
2705 {
2706         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2707                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2708
2709         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2710                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2711                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2712         /*
2713          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2714          * -> target_core_alua_tg_pt_gp_release().
2715          */
2716         config_item_put(item);
2717 }
2718
2719 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2720         .make_group             = &target_core_alua_create_tg_pt_gp,
2721         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2722 };
2723
2724 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2725         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2726         .ct_owner               = THIS_MODULE,
2727 };
2728
2729 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2730
2731 /* Start functions for struct config_item_type target_core_alua_cit */
2732
2733 /*
2734  * target_core_alua_cit is a ConfigFS group that lives under
2735  * /sys/kernel/config/target/core/alua.  There are default groups
2736  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2737  * target_core_alua_cit in target_core_init_configfs() below.
2738  */
2739 static struct config_item_type target_core_alua_cit = {
2740         .ct_item_ops            = NULL,
2741         .ct_attrs               = NULL,
2742         .ct_owner               = THIS_MODULE,
2743 };
2744
2745 /* End functions for struct config_item_type target_core_alua_cit */
2746
2747 /* Start functions for struct config_item_type target_core_stat_cit */
2748
2749 static struct config_group *target_core_stat_mkdir(
2750         struct config_group *group,
2751         const char *name)
2752 {
2753         return ERR_PTR(-ENOSYS);
2754 }
2755
2756 static void target_core_stat_rmdir(
2757         struct config_group *group,
2758         struct config_item *item)
2759 {
2760         return;
2761 }
2762
2763 static struct configfs_group_operations target_core_stat_group_ops = {
2764         .make_group             = &target_core_stat_mkdir,
2765         .drop_item              = &target_core_stat_rmdir,
2766 };
2767
2768 static struct config_item_type target_core_stat_cit = {
2769         .ct_group_ops           = &target_core_stat_group_ops,
2770         .ct_owner               = THIS_MODULE,
2771 };
2772
2773 /* End functions for struct config_item_type target_core_stat_cit */
2774
2775 /* Start functions for struct config_item_type target_core_hba_cit */
2776
2777 static struct config_group *target_core_make_subdev(
2778         struct config_group *group,
2779         const char *name)
2780 {
2781         struct t10_alua_tg_pt_gp *tg_pt_gp;
2782         struct se_subsystem_api *t;
2783         struct config_item *hba_ci = &group->cg_item;
2784         struct se_hba *hba = item_to_hba(hba_ci);
2785         struct se_device *dev;
2786         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2787         struct config_group *dev_stat_grp = NULL;
2788         int errno = -ENOMEM, ret;
2789
2790         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2791         if (ret)
2792                 return ERR_PTR(ret);
2793         /*
2794          * Locate the struct se_subsystem_api from parent's struct se_hba.
2795          */
2796         t = hba->transport;
2797
2798         dev = target_alloc_device(hba, name);
2799         if (!dev)
2800                 goto out_unlock;
2801
2802         dev_cg = &dev->dev_group;
2803
2804         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2805                         GFP_KERNEL);
2806         if (!dev_cg->default_groups)
2807                 goto out_free_device;
2808
2809         config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2810         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2811                         &target_core_dev_attrib_cit);
2812         config_group_init_type_name(&dev->dev_pr_group, "pr",
2813                         &target_core_dev_pr_cit);
2814         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2815                         &target_core_dev_wwn_cit);
2816         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2817                         "alua", &target_core_alua_tg_pt_gps_cit);
2818         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2819                         "statistics", &target_core_stat_cit);
2820
2821         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2822         dev_cg->default_groups[1] = &dev->dev_pr_group;
2823         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2824         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2825         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2826         dev_cg->default_groups[5] = NULL;
2827         /*
2828          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2829          */
2830         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2831         if (!tg_pt_gp)
2832                 goto out_free_dev_cg_default_groups;
2833         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2834
2835         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2836         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2837                                 GFP_KERNEL);
2838         if (!tg_pt_gp_cg->default_groups) {
2839                 pr_err("Unable to allocate tg_pt_gp_cg->"
2840                                 "default_groups\n");
2841                 goto out_free_tg_pt_gp;
2842         }
2843
2844         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2845                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2846         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2847         tg_pt_gp_cg->default_groups[1] = NULL;
2848         /*
2849          * Add core/$HBA/$DEV/statistics/ default groups
2850          */
2851         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2852         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2853                                 GFP_KERNEL);
2854         if (!dev_stat_grp->default_groups) {
2855                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2856                 goto out_free_tg_pt_gp_cg_default_groups;
2857         }
2858         target_stat_setup_dev_default_groups(dev);
2859
2860         mutex_unlock(&hba->hba_access_mutex);
2861         return dev_cg;
2862
2863 out_free_tg_pt_gp_cg_default_groups:
2864         kfree(tg_pt_gp_cg->default_groups);
2865 out_free_tg_pt_gp:
2866         core_alua_free_tg_pt_gp(tg_pt_gp);
2867 out_free_dev_cg_default_groups:
2868         kfree(dev_cg->default_groups);
2869 out_free_device:
2870         target_free_device(dev);
2871 out_unlock:
2872         mutex_unlock(&hba->hba_access_mutex);
2873         return ERR_PTR(errno);
2874 }
2875
2876 static void target_core_drop_subdev(
2877         struct config_group *group,
2878         struct config_item *item)
2879 {
2880         struct config_group *dev_cg = to_config_group(item);
2881         struct se_device *dev =
2882                 container_of(dev_cg, struct se_device, dev_group);
2883         struct se_hba *hba;
2884         struct config_item *df_item;
2885         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2886         int i;
2887
2888         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2889
2890         mutex_lock(&hba->hba_access_mutex);
2891
2892         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2893         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2894                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2895                 dev_stat_grp->default_groups[i] = NULL;
2896                 config_item_put(df_item);
2897         }
2898         kfree(dev_stat_grp->default_groups);
2899
2900         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2901         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2902                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2903                 tg_pt_gp_cg->default_groups[i] = NULL;
2904                 config_item_put(df_item);
2905         }
2906         kfree(tg_pt_gp_cg->default_groups);
2907         /*
2908          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2909          * directly from target_core_alua_tg_pt_gp_release().
2910          */
2911         dev->t10_alua.default_tg_pt_gp = NULL;
2912
2913         for (i = 0; dev_cg->default_groups[i]; i++) {
2914                 df_item = &dev_cg->default_groups[i]->cg_item;
2915                 dev_cg->default_groups[i] = NULL;
2916                 config_item_put(df_item);
2917         }
2918         /*
2919          * se_dev is released from target_core_dev_item_ops->release()
2920          */
2921         config_item_put(item);
2922         mutex_unlock(&hba->hba_access_mutex);
2923 }
2924
2925 static struct configfs_group_operations target_core_hba_group_ops = {
2926         .make_group             = target_core_make_subdev,
2927         .drop_item              = target_core_drop_subdev,
2928 };
2929
2930 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2931 #define SE_HBA_ATTR(_name, _mode)                               \
2932 static struct target_core_hba_attribute                         \
2933                 target_core_hba_##_name =                       \
2934                 __CONFIGFS_EATTR(_name, _mode,                  \
2935                 target_core_hba_show_attr_##_name,              \
2936                 target_core_hba_store_attr_##_name);
2937
2938 #define SE_HBA_ATTR_RO(_name)                                   \
2939 static struct target_core_hba_attribute                         \
2940                 target_core_hba_##_name =                       \
2941                 __CONFIGFS_EATTR_RO(_name,                      \
2942                 target_core_hba_show_attr_##_name);
2943
2944 static ssize_t target_core_hba_show_attr_hba_info(
2945         struct se_hba *hba,
2946         char *page)
2947 {
2948         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2949                         hba->hba_id, hba->transport->name,
2950                         TARGET_CORE_CONFIGFS_VERSION);
2951 }
2952
2953 SE_HBA_ATTR_RO(hba_info);
2954
2955 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2956                                 char *page)
2957 {
2958         int hba_mode = 0;
2959
2960         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2961                 hba_mode = 1;
2962
2963         return sprintf(page, "%d\n", hba_mode);
2964 }
2965
2966 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2967                                 const char *page, size_t count)
2968 {
2969         struct se_subsystem_api *transport = hba->transport;
2970         unsigned long mode_flag;
2971         int ret;
2972
2973         if (transport->pmode_enable_hba == NULL)
2974                 return -EINVAL;
2975
2976         ret = kstrtoul(page, 0, &mode_flag);
2977         if (ret < 0) {
2978                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2979                 return ret;
2980         }
2981
2982         if (hba->dev_count) {
2983                 pr_err("Unable to set hba_mode with active devices\n");
2984                 return -EINVAL;
2985         }
2986
2987         ret = transport->pmode_enable_hba(hba, mode_flag);
2988         if (ret < 0)
2989                 return -EINVAL;
2990         if (ret > 0)
2991                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2992         else if (ret == 0)
2993                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2994
2995         return count;
2996 }
2997
2998 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2999
3000 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3001
3002 static void target_core_hba_release(struct config_item *item)
3003 {
3004         struct se_hba *hba = container_of(to_config_group(item),
3005                                 struct se_hba, hba_group);
3006         core_delete_hba(hba);
3007 }
3008
3009 static struct configfs_attribute *target_core_hba_attrs[] = {
3010         &target_core_hba_hba_info.attr,
3011         &target_core_hba_hba_mode.attr,
3012         NULL,
3013 };
3014
3015 static struct configfs_item_operations target_core_hba_item_ops = {
3016         .release                = target_core_hba_release,
3017         .show_attribute         = target_core_hba_attr_show,
3018         .store_attribute        = target_core_hba_attr_store,
3019 };
3020
3021 static struct config_item_type target_core_hba_cit = {
3022         .ct_item_ops            = &target_core_hba_item_ops,
3023         .ct_group_ops           = &target_core_hba_group_ops,
3024         .ct_attrs               = target_core_hba_attrs,
3025         .ct_owner               = THIS_MODULE,
3026 };
3027
3028 static struct config_group *target_core_call_addhbatotarget(
3029         struct config_group *group,
3030         const char *name)
3031 {
3032         char *se_plugin_str, *str, *str2;
3033         struct se_hba *hba;
3034         char buf[TARGET_CORE_NAME_MAX_LEN];
3035         unsigned long plugin_dep_id = 0;
3036         int ret;
3037
3038         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3039         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3040                 pr_err("Passed *name strlen(): %d exceeds"
3041                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3042                         TARGET_CORE_NAME_MAX_LEN);
3043                 return ERR_PTR(-ENAMETOOLONG);
3044         }
3045         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3046
3047         str = strstr(buf, "_");
3048         if (!str) {
3049                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3050                 return ERR_PTR(-EINVAL);
3051         }
3052         se_plugin_str = buf;
3053         /*
3054          * Special case for subsystem plugins that have "_" in their names.
3055          * Namely rd_direct and rd_mcp..
3056          */
3057         str2 = strstr(str+1, "_");
3058         if (str2) {
3059                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3060                 str2++; /* Skip to start of plugin dependent ID */
3061                 str = str2;
3062         } else {
3063                 *str = '\0'; /* Terminate for *se_plugin_str */
3064                 str++; /* Skip to start of plugin dependent ID */
3065         }
3066
3067         ret = kstrtoul(str, 0, &plugin_dep_id);
3068         if (ret < 0) {
3069                 pr_err("kstrtoul() returned %d for"
3070                                 " plugin_dep_id\n", ret);
3071                 return ERR_PTR(ret);
3072         }
3073         /*
3074          * Load up TCM subsystem plugins if they have not already been loaded.
3075          */
3076         transport_subsystem_check_init();
3077
3078         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3079         if (IS_ERR(hba))
3080                 return ERR_CAST(hba);
3081
3082         config_group_init_type_name(&hba->hba_group, name,
3083                         &target_core_hba_cit);
3084
3085         return &hba->hba_group;
3086 }
3087
3088 static void target_core_call_delhbafromtarget(
3089         struct config_group *group,
3090         struct config_item *item)
3091 {
3092         /*
3093          * core_delete_hba() is called from target_core_hba_item_ops->release()
3094          * -> target_core_hba_release()
3095          */
3096         config_item_put(item);
3097 }
3098
3099 static struct configfs_group_operations target_core_group_ops = {
3100         .make_group     = target_core_call_addhbatotarget,
3101         .drop_item      = target_core_call_delhbafromtarget,
3102 };
3103
3104 static struct config_item_type target_core_cit = {
3105         .ct_item_ops    = NULL,
3106         .ct_group_ops   = &target_core_group_ops,
3107         .ct_attrs       = NULL,
3108         .ct_owner       = THIS_MODULE,
3109 };
3110
3111 /* Stop functions for struct config_item_type target_core_hba_cit */
3112
3113 static int __init target_core_init_configfs(void)
3114 {
3115         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3116         struct config_group *lu_gp_cg = NULL;
3117         struct configfs_subsystem *subsys;
3118         struct t10_alua_lu_gp *lu_gp;
3119         int ret;
3120
3121         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3122                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3123                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3124
3125         subsys = target_core_subsystem[0];
3126         config_group_init(&subsys->su_group);
3127         mutex_init(&subsys->su_mutex);
3128
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 = kmalloc(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                 ret = -ENOMEM;
3142                 goto out_global;
3143         }
3144
3145         config_group_init_type_name(&target_core_hbagroup,
3146                         "core", &target_core_cit);
3147         target_cg->default_groups[0] = &target_core_hbagroup;
3148         target_cg->default_groups[1] = NULL;
3149         /*
3150          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3151          */
3152         hba_cg = &target_core_hbagroup;
3153         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3154                                 GFP_KERNEL);
3155         if (!hba_cg->default_groups) {
3156                 pr_err("Unable to allocate hba_cg->default_groups\n");
3157                 ret = -ENOMEM;
3158                 goto out_global;
3159         }
3160         config_group_init_type_name(&alua_group,
3161                         "alua", &target_core_alua_cit);
3162         hba_cg->default_groups[0] = &alua_group;
3163         hba_cg->default_groups[1] = NULL;
3164         /*
3165          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3166          * groups under /sys/kernel/config/target/core/alua/
3167          */
3168         alua_cg = &alua_group;
3169         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3170                         GFP_KERNEL);
3171         if (!alua_cg->default_groups) {
3172                 pr_err("Unable to allocate alua_cg->default_groups\n");
3173                 ret = -ENOMEM;
3174                 goto out_global;
3175         }
3176
3177         config_group_init_type_name(&alua_lu_gps_group,
3178                         "lu_gps", &target_core_alua_lu_gps_cit);
3179         alua_cg->default_groups[0] = &alua_lu_gps_group;
3180         alua_cg->default_groups[1] = NULL;
3181         /*
3182          * Add core/alua/lu_gps/default_lu_gp
3183          */
3184         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3185         if (IS_ERR(lu_gp)) {
3186                 ret = -ENOMEM;
3187                 goto out_global;
3188         }
3189
3190         lu_gp_cg = &alua_lu_gps_group;
3191         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3192                         GFP_KERNEL);
3193         if (!lu_gp_cg->default_groups) {
3194                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3195                 ret = -ENOMEM;
3196                 goto out_global;
3197         }
3198
3199         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3200                                 &target_core_alua_lu_gp_cit);
3201         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3202         lu_gp_cg->default_groups[1] = NULL;
3203         default_lu_gp = lu_gp;
3204         /*
3205          * Register the target_core_mod subsystem with configfs.
3206          */
3207         ret = configfs_register_subsystem(subsys);
3208         if (ret < 0) {
3209                 pr_err("Error %d while registering subsystem %s\n",
3210                         ret, subsys->su_group.cg_item.ci_namebuf);
3211                 goto out_global;
3212         }
3213         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3214                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3215                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3216         /*
3217          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3218          */
3219         ret = rd_module_init();
3220         if (ret < 0)
3221                 goto out;
3222
3223         ret = core_dev_setup_virtual_lun0();
3224         if (ret < 0)
3225                 goto out;
3226
3227         ret = target_xcopy_setup_pt();
3228         if (ret < 0)
3229                 goto out;
3230
3231         return 0;
3232
3233 out:
3234         configfs_unregister_subsystem(subsys);
3235         core_dev_release_virtual_lun0();
3236         rd_module_exit();
3237 out_global:
3238         if (default_lu_gp) {
3239                 core_alua_free_lu_gp(default_lu_gp);
3240                 default_lu_gp = NULL;
3241         }
3242         if (lu_gp_cg)
3243                 kfree(lu_gp_cg->default_groups);
3244         if (alua_cg)
3245                 kfree(alua_cg->default_groups);
3246         if (hba_cg)
3247                 kfree(hba_cg->default_groups);
3248         kfree(target_cg->default_groups);
3249         release_se_kmem_caches();
3250         return ret;
3251 }
3252
3253 static void __exit target_core_exit_configfs(void)
3254 {
3255         struct configfs_subsystem *subsys;
3256         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3257         struct config_item *item;
3258         int i;
3259
3260         subsys = target_core_subsystem[0];
3261
3262         lu_gp_cg = &alua_lu_gps_group;
3263         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3264                 item = &lu_gp_cg->default_groups[i]->cg_item;
3265                 lu_gp_cg->default_groups[i] = NULL;
3266                 config_item_put(item);
3267         }
3268         kfree(lu_gp_cg->default_groups);
3269         lu_gp_cg->default_groups = NULL;
3270
3271         alua_cg = &alua_group;
3272         for (i = 0; alua_cg->default_groups[i]; i++) {
3273                 item = &alua_cg->default_groups[i]->cg_item;
3274                 alua_cg->default_groups[i] = NULL;
3275                 config_item_put(item);
3276         }
3277         kfree(alua_cg->default_groups);
3278         alua_cg->default_groups = NULL;
3279
3280         hba_cg = &target_core_hbagroup;
3281         for (i = 0; hba_cg->default_groups[i]; i++) {
3282                 item = &hba_cg->default_groups[i]->cg_item;
3283                 hba_cg->default_groups[i] = NULL;
3284                 config_item_put(item);
3285         }
3286         kfree(hba_cg->default_groups);
3287         hba_cg->default_groups = NULL;
3288         /*
3289          * We expect subsys->su_group.default_groups to be released
3290          * by configfs subsystem provider logic..
3291          */
3292         configfs_unregister_subsystem(subsys);
3293         kfree(subsys->su_group.default_groups);
3294
3295         core_alua_free_lu_gp(default_lu_gp);
3296         default_lu_gp = NULL;
3297
3298         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3299                         " Infrastructure\n");
3300
3301         core_dev_release_virtual_lun0();
3302         rd_module_exit();
3303         target_xcopy_release_pt();
3304         release_se_kmem_caches();
3305 }
3306
3307 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3308 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3309 MODULE_LICENSE("GPL");
3310
3311 module_init(target_core_init_configfs);
3312 module_exit(target_core_exit_configfs);