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