drivers/target/target_core_configfs.c

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