drivers/target/target_core_configfs.c

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