kernel/drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * (c) Copyright 2008-2013 Datera, Inc.
   7  *
   8  * Nicholas A. Bellinger <nab@kernel.org>
   9  *
  10  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <generated/utsrelease.h>
  26 #include <linux/utsname.h>
  27 #include <linux/init.h>
  28 #include <linux/fs.h>
  29 #include <linux/namei.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/delay.h>
  33 #include <linux/unistd.h>
  34 #include <linux/string.h>
  35 #include <linux/parser.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38 #include <linux/spinlock.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_backend.h>
  42 #include <target/target_core_fabric.h>
  43
  44 #include "target_core_internal.h"
  45 #include "target_core_alua.h"
  46 #include "target_core_pr.h"
  47 #include "target_core_rd.h"
  48 #include "target_core_xcopy.h"
  49
  50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  51 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  52 {                                                                       \
  53         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  54                                                                         \
  55         cit->ct_item_ops = _item_ops;                                   \
  56         cit->ct_group_ops = _group_ops;                                 \
  57         cit->ct_attrs = _attrs;                                         \
  58         cit->ct_owner = tb->ops->owner;                                 \
  59         pr_debug("Setup generic %s\n", __stringify(_name));             \
  60 }
  61
  62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  63 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  64 {                                                                       \
  65         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  66                                                                         \
  67         cit->ct_item_ops = _item_ops;                                   \
  68         cit->ct_group_ops = _group_ops;                                 \
  69         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  70         cit->ct_owner = tb->ops->owner;                                 \
  71         pr_debug("Setup generic %s\n", __stringify(_name));             \
  72 }
  73
  74 extern struct t10_alua_lu_gp *default_lu_gp;
  75
  76 static LIST_HEAD(g_tf_list);
  77 static DEFINE_MUTEX(g_tf_lock);
  78
  79 static struct config_group target_core_hbagroup;
  80 static struct config_group alua_group;
  81 static struct config_group alua_lu_gps_group;
  82
  83 static inline struct se_hba *
  84 item_to_hba(struct config_item *item)
  85 {
  86         return container_of(to_config_group(item), struct se_hba, hba_group);
  87 }
  88
  89 /*
  90  * Attributes for /sys/kernel/config/target/
  91  */
  92 static ssize_t target_core_item_version_show(struct config_item *item,
  93                 char *page)
  94 {
  95         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  96                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
  97                 utsname()->sysname, utsname()->machine);
  98 }
  99
 100 CONFIGFS_ATTR_RO(target_core_item_, version);
 101
 102 static struct target_fabric_configfs *target_core_get_fabric(
 103         const char *name)
 104 {
 105         struct target_fabric_configfs *tf;
 106
 107         if (!name)
 108                 return NULL;
 109
 110         mutex_lock(&g_tf_lock);
 111         list_for_each_entry(tf, &g_tf_list, tf_list) {
 112                 if (!strcmp(tf->tf_ops->name, name)) {
 113                         atomic_inc(&tf->tf_access_cnt);
 114                         mutex_unlock(&g_tf_lock);
 115                         return tf;
 116                 }
 117         }
 118         mutex_unlock(&g_tf_lock);
 119
 120         return NULL;
 121 }
 122
 123 /*
 124  * Called from struct target_core_group_ops->make_group()
 125  */
 126 static struct config_group *target_core_register_fabric(
 127         struct config_group *group,
 128         const char *name)
 129 {
 130         struct target_fabric_configfs *tf;
 131         int ret;
 132
 133         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 134                         " %s\n", group, name);
 135
 136         tf = target_core_get_fabric(name);
 137         if (!tf) {
 138                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 139                          name);
 140
 141                 /*
 142                  * Below are some hardcoded request_module() calls to automatically
 143                  * local fabric modules when the following is called:
 144                  *
 145                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 146                  *
 147                  * Note that this does not limit which TCM fabric module can be
 148                  * registered, but simply provids auto loading logic for modules with
 149                  * mkdir(2) system calls with known TCM fabric modules.
 150                  */
 151
 152                 if (!strncmp(name, "iscsi", 5)) {
 153                         /*
 154                          * Automatically load the LIO Target fabric module when the
 155                          * following is called:
 156                          *
 157                          * mkdir -p $CONFIGFS/target/iscsi
 158                          */
 159                         ret = request_module("iscsi_target_mod");
 160                         if (ret < 0) {
 161                                 pr_debug("request_module() failed for"
 162                                          " iscsi_target_mod.ko: %d\n", ret);
 163                                 return ERR_PTR(-EINVAL);
 164                         }
 165                 } else if (!strncmp(name, "loopback", 8)) {
 166                         /*
 167                          * Automatically load the tcm_loop fabric module when the
 168                          * following is called:
 169                          *
 170                          * mkdir -p $CONFIGFS/target/loopback
 171                          */
 172                         ret = request_module("tcm_loop");
 173                         if (ret < 0) {
 174                                 pr_debug("request_module() failed for"
 175                                          " tcm_loop.ko: %d\n", ret);
 176                                 return ERR_PTR(-EINVAL);
 177                         }
 178                 }
 179
 180                 tf = target_core_get_fabric(name);
 181         }
 182
 183         if (!tf) {
 184                 pr_debug("target_core_get_fabric() failed for %s\n",
 185                          name);
 186                 return ERR_PTR(-EINVAL);
 187         }
 188         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 189                         " %s\n", tf->tf_ops->name);
 190         /*
 191          * On a successful target_core_get_fabric() look, the returned
 192          * struct target_fabric_configfs *tf will contain a usage reference.
 193          */
 194         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 195                         &tf->tf_wwn_cit);
 196
 197         tf->tf_group.default_groups = tf->tf_default_groups;
 198         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 199         tf->tf_group.default_groups[1] = NULL;
 200
 201         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 202         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 203                         &tf->tf_discovery_cit);
 204
 205         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 206                         " %s\n", tf->tf_group.cg_item.ci_name);
 207         return &tf->tf_group;
 208 }
 209
 210 /*
 211  * Called from struct target_core_group_ops->drop_item()
 212  */
 213 static void target_core_deregister_fabric(
 214         struct config_group *group,
 215         struct config_item *item)
 216 {
 217         struct target_fabric_configfs *tf = container_of(
 218                 to_config_group(item), struct target_fabric_configfs, tf_group);
 219         struct config_group *tf_group;
 220         struct config_item *df_item;
 221         int i;
 222
 223         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 224                 " tf list\n", config_item_name(item));
 225
 226         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 227                         " %s\n", tf->tf_ops->name);
 228         atomic_dec(&tf->tf_access_cnt);
 229
 230         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 231                         " %s\n", config_item_name(item));
 232
 233         tf_group = &tf->tf_group;
 234         for (i = 0; tf_group->default_groups[i]; i++) {
 235                 df_item = &tf_group->default_groups[i]->cg_item;
 236                 tf_group->default_groups[i] = NULL;
 237                 config_item_put(df_item);
 238         }
 239         config_item_put(item);
 240 }
 241
 242 static struct configfs_group_operations target_core_fabric_group_ops = {
 243         .make_group     = &target_core_register_fabric,
 244         .drop_item      = &target_core_deregister_fabric,
 245 };
 246
 247 /*
 248  * All item attributes appearing in /sys/kernel/target/ appear here.
 249  */
 250 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 251         &target_core_item_attr_version,
 252         NULL,
 253 };
 254
 255 /*
 256  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 257  */
 258 static struct config_item_type target_core_fabrics_item = {
 259         .ct_group_ops   = &target_core_fabric_group_ops,
 260         .ct_attrs       = target_core_fabric_item_attrs,
 261         .ct_owner       = THIS_MODULE,
 262 };
 263
 264 static struct configfs_subsystem target_core_fabrics = {
 265         .su_group = {
 266                 .cg_item = {
 267                         .ci_namebuf = "target",
 268                         .ci_type = &target_core_fabrics_item,
 269                 },
 270         },
 271 };
 272
 273 int target_depend_item(struct config_item *item)
 274 {
 275         return configfs_depend_item(&target_core_fabrics, item);
 276 }
 277 EXPORT_SYMBOL(target_depend_item);
 278
 279 void target_undepend_item(struct config_item *item)
 280 {
 281         return configfs_undepend_item(&target_core_fabrics, item);
 282 }
 283 EXPORT_SYMBOL(target_undepend_item);
 284
 285 /*##############################################################################
 286 // Start functions called by external Target Fabrics Modules
 287 //############################################################################*/
 288
 289 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 290 {
 291         if (!tfo->name) {
 292                 pr_err("Missing tfo->name\n");
 293                 return -EINVAL;
 294         }
 295         if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
 296                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 297                         "_NAME_SIZE\n", tfo->name);
 298                 return -EINVAL;
 299         }
 300         if (!tfo->get_fabric_name) {
 301                 pr_err("Missing tfo->get_fabric_name()\n");
 302                 return -EINVAL;
 303         }
 304         if (!tfo->tpg_get_wwn) {
 305                 pr_err("Missing tfo->tpg_get_wwn()\n");
 306                 return -EINVAL;
 307         }
 308         if (!tfo->tpg_get_tag) {
 309                 pr_err("Missing tfo->tpg_get_tag()\n");
 310                 return -EINVAL;
 311         }
 312         if (!tfo->tpg_check_demo_mode) {
 313                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 314                 return -EINVAL;
 315         }
 316         if (!tfo->tpg_check_demo_mode_cache) {
 317                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 318                 return -EINVAL;
 319         }
 320         if (!tfo->tpg_check_demo_mode_write_protect) {
 321                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 322                 return -EINVAL;
 323         }
 324         if (!tfo->tpg_check_prod_mode_write_protect) {
 325                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 326                 return -EINVAL;
 327         }
 328         if (!tfo->tpg_get_inst_index) {
 329                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 330                 return -EINVAL;
 331         }
 332         if (!tfo->release_cmd) {
 333                 pr_err("Missing tfo->release_cmd()\n");
 334                 return -EINVAL;
 335         }
 336         if (!tfo->shutdown_session) {
 337                 pr_err("Missing tfo->shutdown_session()\n");
 338                 return -EINVAL;
 339         }
 340         if (!tfo->close_session) {
 341                 pr_err("Missing tfo->close_session()\n");
 342                 return -EINVAL;
 343         }
 344         if (!tfo->sess_get_index) {
 345                 pr_err("Missing tfo->sess_get_index()\n");
 346                 return -EINVAL;
 347         }
 348         if (!tfo->write_pending) {
 349                 pr_err("Missing tfo->write_pending()\n");
 350                 return -EINVAL;
 351         }
 352         if (!tfo->write_pending_status) {
 353                 pr_err("Missing tfo->write_pending_status()\n");
 354                 return -EINVAL;
 355         }
 356         if (!tfo->set_default_node_attributes) {
 357                 pr_err("Missing tfo->set_default_node_attributes()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->get_cmd_state) {
 361                 pr_err("Missing tfo->get_cmd_state()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->queue_data_in) {
 365                 pr_err("Missing tfo->queue_data_in()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->queue_status) {
 369                 pr_err("Missing tfo->queue_status()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->queue_tm_rsp) {
 373                 pr_err("Missing tfo->queue_tm_rsp()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->aborted_task) {
 377                 pr_err("Missing tfo->aborted_task()\n");
 378                 return -EINVAL;
 379         }
 380         /*
 381          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 382          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 383          * target_core_fabric_configfs.c WWN+TPG group context code.
 384          */
 385         if (!tfo->fabric_make_wwn) {
 386                 pr_err("Missing tfo->fabric_make_wwn()\n");
 387                 return -EINVAL;
 388         }
 389         if (!tfo->fabric_drop_wwn) {
 390                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 391                 return -EINVAL;
 392         }
 393         if (!tfo->fabric_make_tpg) {
 394                 pr_err("Missing tfo->fabric_make_tpg()\n");
 395                 return -EINVAL;
 396         }
 397         if (!tfo->fabric_drop_tpg) {
 398                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 399                 return -EINVAL;
 400         }
 401
 402         return 0;
 403 }
 404
 405 int target_register_template(const struct target_core_fabric_ops *fo)
 406 {
 407         struct target_fabric_configfs *tf;
 408         int ret;
 409
 410         ret = target_fabric_tf_ops_check(fo);
 411         if (ret)
 412                 return ret;
 413
 414         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 415         if (!tf) {
 416                 pr_err("%s: could not allocate memory!\n", __func__);
 417                 return -ENOMEM;
 418         }
 419
 420         INIT_LIST_HEAD(&tf->tf_list);
 421         atomic_set(&tf->tf_access_cnt, 0);
 422         tf->tf_ops = fo;
 423         target_fabric_setup_cits(tf);
 424
 425         mutex_lock(&g_tf_lock);
 426         list_add_tail(&tf->tf_list, &g_tf_list);
 427         mutex_unlock(&g_tf_lock);
 428
 429         return 0;
 430 }
 431 EXPORT_SYMBOL(target_register_template);
 432
 433 void target_unregister_template(const struct target_core_fabric_ops *fo)
 434 {
 435         struct target_fabric_configfs *t;
 436
 437         mutex_lock(&g_tf_lock);
 438         list_for_each_entry(t, &g_tf_list, tf_list) {
 439                 if (!strcmp(t->tf_ops->name, fo->name)) {
 440                         BUG_ON(atomic_read(&t->tf_access_cnt));
 441                         list_del(&t->tf_list);
 442                         mutex_unlock(&g_tf_lock);
 443                         /*
 444                          * Wait for any outstanding fabric se_deve_entry->rcu_head
 445                          * callbacks to complete post kfree_rcu(), before allowing
 446                          * fabric driver unload of TFO->module to proceed.
 447                          */
 448                         rcu_barrier();
 449                         kfree(t);
 450                         return;
 451                 }
 452         }
 453         mutex_unlock(&g_tf_lock);
 454 }
 455 EXPORT_SYMBOL(target_unregister_template);
 456
 457 /*##############################################################################
 458 // Stop functions called by external Target Fabrics Modules
 459 //############################################################################*/
 460
 461 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
 462 {
 463         return container_of(to_config_group(item), struct se_dev_attrib,
 464                         da_group);
 465 }
 466
 467 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 468 #define DEF_CONFIGFS_ATTRIB_SHOW(_name)                                 \
 469 static ssize_t _name##_show(struct config_item *item, char *page)       \
 470 {                                                                       \
 471         return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
 472 }
 473
 474 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
 475 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
 476 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
 477 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
 478 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
 479 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
 480 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
 481 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
 482 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
 483 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
 484 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
 485 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
 486 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
 487 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
 488 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
 489 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
 490 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
 491 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
 492 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
 493 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
 494 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
 495 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
 496 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
 497 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
 498 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
 499 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
 500 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
 501 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
 502 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
 503
 504 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name)                            \
 505 static ssize_t _name##_store(struct config_item *item, const char *page,\
 506                 size_t count)                                           \
 507 {                                                                       \
 508         struct se_dev_attrib *da = to_attrib(item);                     \
 509         u32 val;                                                        \
 510         int ret;                                                        \
 511                                                                         \
 512         ret = kstrtou32(page, 0, &val);                                 \
 513         if (ret < 0)                                                    \
 514                 return ret;                                             \
 515         da->_name = val;                                                \
 516         return count;                                                   \
 517 }
 518
 519 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
 520 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
 521 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
 522 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
 523 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
 524
 525 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name)                           \
 526 static ssize_t _name##_store(struct config_item *item, const char *page,        \
 527                 size_t count)                                           \
 528 {                                                                       \
 529         struct se_dev_attrib *da = to_attrib(item);                     \
 530         bool flag;                                                      \
 531         int ret;                                                        \
 532                                                                         \
 533         ret = strtobool(page, &flag);                                   \
 534         if (ret < 0)                                                    \
 535                 return ret;                                             \
 536         da->_name = flag;                                               \
 537         return count;                                                   \
 538 }
 539
 540 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
 541 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
 542 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
 543 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
 544 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
 545
 546 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name)                           \
 547 static ssize_t _name##_store(struct config_item *item, const char *page,\
 548                 size_t count)                                           \
 549 {                                                                       \
 550         printk_once(KERN_WARNING                                        \
 551                 "ignoring deprecated ##_name## attribute\n");   \
 552         return count;                                                   \
 553 }
 554
 555 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
 556 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
 557
 558 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 559 {
 560         const char *configname;
 561
 562         configname = config_item_name(&dev->dev_group.cg_item);
 563         if (strlen(configname) >= 16) {
 564                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 565                         "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
 566                         configname);
 567         }
 568         snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
 569 }
 570
 571 static ssize_t emulate_model_alias_store(struct config_item *item,
 572                 const char *page, size_t count)
 573 {
 574         struct se_dev_attrib *da = to_attrib(item);
 575         struct se_device *dev = da->da_dev;
 576         bool flag;
 577         int ret;
 578
 579         if (dev->export_count) {
 580                 pr_err("dev[%p]: Unable to change model alias"
 581                         " while export_count is %d\n",
 582                         dev, dev->export_count);
 583                 return -EINVAL;
 584         }
 585
 586         ret = strtobool(page, &flag);
 587         if (ret < 0)
 588                 return ret;
 589
 590         if (flag) {
 591                 dev_set_t10_wwn_model_alias(dev);
 592         } else {
 593                 strncpy(&dev->t10_wwn.model[0],
 594                         dev->transport->inquiry_prod, 16);
 595         }
 596         da->emulate_model_alias = flag;
 597         return count;
 598 }
 599
 600 static ssize_t emulate_write_cache_store(struct config_item *item,
 601                 const char *page, size_t count)
 602 {
 603         struct se_dev_attrib *da = to_attrib(item);
 604         bool flag;
 605         int ret;
 606
 607         ret = strtobool(page, &flag);
 608         if (ret < 0)
 609                 return ret;
 610
 611         if (flag && da->da_dev->transport->get_write_cache) {
 612                 pr_err("emulate_write_cache not supported for this device\n");
 613                 return -EINVAL;
 614         }
 615
 616         da->emulate_write_cache = flag;
 617         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 618                         da->da_dev, flag);
 619         return count;
 620 }
 621
 622 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
 623                 const char *page, size_t count)
 624 {
 625         struct se_dev_attrib *da = to_attrib(item);
 626         u32 val;
 627         int ret;
 628
 629         ret = kstrtou32(page, 0, &val);
 630         if (ret < 0)
 631                 return ret;
 632
 633         if (val != 0 && val != 1 && val != 2) {
 634                 pr_err("Illegal value %d\n", val);
 635                 return -EINVAL;
 636         }
 637
 638         if (da->da_dev->export_count) {
 639                 pr_err("dev[%p]: Unable to change SE Device"
 640                         " UA_INTRLCK_CTRL while export_count is %d\n",
 641                         da->da_dev, da->da_dev->export_count);
 642                 return -EINVAL;
 643         }
 644         da->emulate_ua_intlck_ctrl = val;
 645         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 646                 da->da_dev, val);
 647         return count;
 648 }
 649
 650 static ssize_t emulate_tas_store(struct config_item *item,
 651                 const char *page, size_t count)
 652 {
 653         struct se_dev_attrib *da = to_attrib(item);
 654         bool flag;
 655         int ret;
 656
 657         ret = strtobool(page, &flag);
 658         if (ret < 0)
 659                 return ret;
 660
 661         if (da->da_dev->export_count) {
 662                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 663                         " export_count is %d\n",
 664                         da->da_dev, da->da_dev->export_count);
 665                 return -EINVAL;
 666         }
 667         da->emulate_tas = flag;
 668         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 669                 da->da_dev, flag ? "Enabled" : "Disabled");
 670
 671         return count;
 672 }
 673
 674 static ssize_t emulate_tpu_store(struct config_item *item,
 675                 const char *page, size_t count)
 676 {
 677         struct se_dev_attrib *da = to_attrib(item);
 678         bool flag;
 679         int ret;
 680
 681         ret = strtobool(page, &flag);
 682         if (ret < 0)
 683                 return ret;
 684
 685         /*
 686          * We expect this value to be non-zero when generic Block Layer
 687          * Discard supported is detected iblock_create_virtdevice().
 688          */
 689         if (flag && !da->max_unmap_block_desc_count) {
 690                 pr_err("Generic Block Discard not supported\n");
 691                 return -ENOSYS;
 692         }
 693
 694         da->emulate_tpu = flag;
 695         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 696                 da->da_dev, flag);
 697         return count;
 698 }
 699
 700 static ssize_t emulate_tpws_store(struct config_item *item,
 701                 const char *page, size_t count)
 702 {
 703         struct se_dev_attrib *da = to_attrib(item);
 704         bool flag;
 705         int ret;
 706
 707         ret = strtobool(page, &flag);
 708         if (ret < 0)
 709                 return ret;
 710
 711         /*
 712          * We expect this value to be non-zero when generic Block Layer
 713          * Discard supported is detected iblock_create_virtdevice().
 714          */
 715         if (flag && !da->max_unmap_block_desc_count) {
 716                 pr_err("Generic Block Discard not supported\n");
 717                 return -ENOSYS;
 718         }
 719
 720         da->emulate_tpws = flag;
 721         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 722                                 da->da_dev, flag);
 723         return count;
 724 }
 725
 726 static ssize_t pi_prot_type_store(struct config_item *item,
 727                 const char *page, size_t count)
 728 {
 729         struct se_dev_attrib *da = to_attrib(item);
 730         int old_prot = da->pi_prot_type, ret;
 731         struct se_device *dev = da->da_dev;
 732         u32 flag;
 733
 734         ret = kstrtou32(page, 0, &flag);
 735         if (ret < 0)
 736                 return ret;
 737
 738         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 739                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 740                 return -EINVAL;
 741         }
 742         if (flag == 2) {
 743                 pr_err("DIF TYPE2 protection currently not supported\n");
 744                 return -ENOSYS;
 745         }
 746         if (da->hw_pi_prot_type) {
 747                 pr_warn("DIF protection enabled on underlying hardware,"
 748                         " ignoring\n");
 749                 return count;
 750         }
 751         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 752                 /* 0 is only allowed value for non-supporting backends */
 753                 if (flag == 0)
 754                         return count;
 755
 756                 pr_err("DIF protection not supported by backend: %s\n",
 757                        dev->transport->name);
 758                 return -ENOSYS;
 759         }
 760         if (!(dev->dev_flags & DF_CONFIGURED)) {
 761                 pr_err("DIF protection requires device to be configured\n");
 762                 return -ENODEV;
 763         }
 764         if (dev->export_count) {
 765                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 766                        " export_count is %d\n", dev, dev->export_count);
 767                 return -EINVAL;
 768         }
 769
 770         da->pi_prot_type = flag;
 771
 772         if (flag && !old_prot) {
 773                 ret = dev->transport->init_prot(dev);
 774                 if (ret) {
 775                         da->pi_prot_type = old_prot;
 776                         return ret;
 777                 }
 778
 779         } else if (!flag && old_prot) {
 780                 dev->transport->free_prot(dev);
 781         }
 782
 783         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 784         return count;
 785 }
 786
 787 static ssize_t pi_prot_format_store(struct config_item *item,
 788                 const char *page, size_t count)
 789 {
 790         struct se_dev_attrib *da = to_attrib(item);
 791         struct se_device *dev = da->da_dev;
 792         bool flag;
 793         int ret;
 794
 795         ret = strtobool(page, &flag);
 796         if (ret < 0)
 797                 return ret;
 798
 799         if (!flag)
 800                 return count;
 801
 802         if (!dev->transport->format_prot) {
 803                 pr_err("DIF protection format not supported by backend %s\n",
 804                        dev->transport->name);
 805                 return -ENOSYS;
 806         }
 807         if (!(dev->dev_flags & DF_CONFIGURED)) {
 808                 pr_err("DIF protection format requires device to be configured\n");
 809                 return -ENODEV;
 810         }
 811         if (dev->export_count) {
 812                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 813                        " export_count is %d\n", dev, dev->export_count);
 814                 return -EINVAL;
 815         }
 816
 817         ret = dev->transport->format_prot(dev);
 818         if (ret)
 819                 return ret;
 820
 821         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 822         return count;
 823 }
 824
 825 static ssize_t force_pr_aptpl_store(struct config_item *item,
 826                 const char *page, size_t count)
 827 {
 828         struct se_dev_attrib *da = to_attrib(item);
 829         bool flag;
 830         int ret;
 831
 832         ret = strtobool(page, &flag);
 833         if (ret < 0)
 834                 return ret;
 835         if (da->da_dev->export_count) {
 836                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 837                        " export_count is %d\n",
 838                        da->da_dev, da->da_dev->export_count);
 839                 return -EINVAL;
 840         }
 841
 842         da->force_pr_aptpl = flag;
 843         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 844         return count;
 845 }
 846
 847 static ssize_t emulate_rest_reord_store(struct config_item *item,
 848                 const char *page, size_t count)
 849 {
 850         struct se_dev_attrib *da = to_attrib(item);
 851         bool flag;
 852         int ret;
 853
 854         ret = strtobool(page, &flag);
 855         if (ret < 0)
 856                 return ret;
 857
 858         if (flag != 0) {
 859                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 860                         " reordering not implemented\n", da->da_dev);
 861                 return -ENOSYS;
 862         }
 863         da->emulate_rest_reord = flag;
 864         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 865                 da->da_dev, flag);
 866         return count;
 867 }
 868
 869 /*
 870  * Note, this can only be called on unexported SE Device Object.
 871  */
 872 static ssize_t queue_depth_store(struct config_item *item,
 873                 const char *page, size_t count)
 874 {
 875         struct se_dev_attrib *da = to_attrib(item);
 876         struct se_device *dev = da->da_dev;
 877         u32 val;
 878         int ret;
 879
 880         ret = kstrtou32(page, 0, &val);
 881         if (ret < 0)
 882                 return ret;
 883
 884         if (dev->export_count) {
 885                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
 886                         " export_count is %d\n",
 887                         dev, dev->export_count);
 888                 return -EINVAL;
 889         }
 890         if (!val) {
 891                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
 892                 return -EINVAL;
 893         }
 894
 895         if (val > dev->dev_attrib.queue_depth) {
 896                 if (val > dev->dev_attrib.hw_queue_depth) {
 897                         pr_err("dev[%p]: Passed queue_depth:"
 898                                 " %u exceeds TCM/SE_Device MAX"
 899                                 " TCQ: %u\n", dev, val,
 900                                 dev->dev_attrib.hw_queue_depth);
 901                         return -EINVAL;
 902                 }
 903         }
 904         da->queue_depth = dev->queue_depth = val;
 905         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
 906         return count;
 907 }
 908
 909 static ssize_t optimal_sectors_store(struct config_item *item,
 910                 const char *page, size_t count)
 911 {
 912         struct se_dev_attrib *da = to_attrib(item);
 913         u32 val;
 914         int ret;
 915
 916         ret = kstrtou32(page, 0, &val);
 917         if (ret < 0)
 918                 return ret;
 919
 920         if (da->da_dev->export_count) {
 921                 pr_err("dev[%p]: Unable to change SE Device"
 922                         " optimal_sectors while export_count is %d\n",
 923                         da->da_dev, da->da_dev->export_count);
 924                 return -EINVAL;
 925         }
 926         if (val > da->hw_max_sectors) {
 927                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
 928                         " greater than hw_max_sectors: %u\n",
 929                         da->da_dev, val, da->hw_max_sectors);
 930                 return -EINVAL;
 931         }
 932
 933         da->optimal_sectors = val;
 934         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
 935                         da->da_dev, val);
 936         return count;
 937 }
 938
 939 static ssize_t block_size_store(struct config_item *item,
 940                 const char *page, size_t count)
 941 {
 942         struct se_dev_attrib *da = to_attrib(item);
 943         u32 val;
 944         int ret;
 945
 946         ret = kstrtou32(page, 0, &val);
 947         if (ret < 0)
 948                 return ret;
 949
 950         if (da->da_dev->export_count) {
 951                 pr_err("dev[%p]: Unable to change SE Device block_size"
 952                         " while export_count is %d\n",
 953                         da->da_dev, da->da_dev->export_count);
 954                 return -EINVAL;
 955         }
 956
 957         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
 958                 pr_err("dev[%p]: Illegal value for block_device: %u"
 959                         " for SE device, must be 512, 1024, 2048 or 4096\n",
 960                         da->da_dev, val);
 961                 return -EINVAL;
 962         }
 963
 964         da->block_size = val;
 965         if (da->max_bytes_per_io)
 966                 da->hw_max_sectors = da->max_bytes_per_io / val;
 967
 968         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
 969                         da->da_dev, val);
 970         return count;
 971 }
 972
 973 CONFIGFS_ATTR(, emulate_model_alias);
 974 CONFIGFS_ATTR(, emulate_dpo);
 975 CONFIGFS_ATTR(, emulate_fua_write);
 976 CONFIGFS_ATTR(, emulate_fua_read);
 977 CONFIGFS_ATTR(, emulate_write_cache);
 978 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
 979 CONFIGFS_ATTR(, emulate_tas);
 980 CONFIGFS_ATTR(, emulate_tpu);
 981 CONFIGFS_ATTR(, emulate_tpws);
 982 CONFIGFS_ATTR(, emulate_caw);
 983 CONFIGFS_ATTR(, emulate_3pc);
 984 CONFIGFS_ATTR(, pi_prot_type);
 985 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
 986 CONFIGFS_ATTR(, pi_prot_format);
 987 CONFIGFS_ATTR(, enforce_pr_isids);
 988 CONFIGFS_ATTR(, is_nonrot);
 989 CONFIGFS_ATTR(, emulate_rest_reord);
 990 CONFIGFS_ATTR(, force_pr_aptpl);
 991 CONFIGFS_ATTR_RO(, hw_block_size);
 992 CONFIGFS_ATTR(, block_size);
 993 CONFIGFS_ATTR_RO(, hw_max_sectors);
 994 CONFIGFS_ATTR(, optimal_sectors);
 995 CONFIGFS_ATTR_RO(, hw_queue_depth);
 996 CONFIGFS_ATTR(, queue_depth);
 997 CONFIGFS_ATTR(, max_unmap_lba_count);
 998 CONFIGFS_ATTR(, max_unmap_block_desc_count);
 999 CONFIGFS_ATTR(, unmap_granularity);
1000 CONFIGFS_ATTR(, unmap_granularity_alignment);
1001 CONFIGFS_ATTR(, max_write_same_len);
1002
1003 /*
1004  * dev_attrib attributes for devices using the target core SBC/SPC
1005  * interpreter.  Any backend using spc_parse_cdb should be using
1006  * these.
1007  */
1008 struct configfs_attribute *sbc_attrib_attrs[] = {
1009         &attr_emulate_model_alias,
1010         &attr_emulate_dpo,
1011         &attr_emulate_fua_write,
1012         &attr_emulate_fua_read,
1013         &attr_emulate_write_cache,
1014         &attr_emulate_ua_intlck_ctrl,
1015         &attr_emulate_tas,
1016         &attr_emulate_tpu,
1017         &attr_emulate_tpws,
1018         &attr_emulate_caw,
1019         &attr_emulate_3pc,
1020         &attr_pi_prot_type,
1021         &attr_hw_pi_prot_type,
1022         &attr_pi_prot_format,
1023         &attr_enforce_pr_isids,
1024         &attr_is_nonrot,
1025         &attr_emulate_rest_reord,
1026         &attr_force_pr_aptpl,
1027         &attr_hw_block_size,
1028         &attr_block_size,
1029         &attr_hw_max_sectors,
1030         &attr_optimal_sectors,
1031         &attr_hw_queue_depth,
1032         &attr_queue_depth,
1033         &attr_max_unmap_lba_count,
1034         &attr_max_unmap_block_desc_count,
1035         &attr_unmap_granularity,
1036         &attr_unmap_granularity_alignment,
1037         &attr_max_write_same_len,
1038         NULL,
1039 };
1040 EXPORT_SYMBOL(sbc_attrib_attrs);
1041
1042 /*
1043  * Minimal dev_attrib attributes for devices passing through CDBs.
1044  * In this case we only provide a few read-only attributes for
1045  * backwards compatibility.
1046  */
1047 struct configfs_attribute *passthrough_attrib_attrs[] = {
1048         &attr_hw_pi_prot_type,
1049         &attr_hw_block_size,
1050         &attr_hw_max_sectors,
1051         &attr_hw_queue_depth,
1052         NULL,
1053 };
1054 EXPORT_SYMBOL(passthrough_attrib_attrs);
1055
1056 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1057
1058 /* End functions for struct config_item_type tb_dev_attrib_cit */
1059
1060 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1061
1062 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1063 {
1064         return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1065 }
1066
1067 /*
1068  * VPD page 0x80 Unit serial
1069  */
1070 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1071                 char *page)
1072 {
1073         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1074                 &to_t10_wwn(item)->unit_serial[0]);
1075 }
1076
1077 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1078                 const char *page, size_t count)
1079 {
1080         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1081         struct se_device *dev = t10_wwn->t10_dev;
1082         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1083
1084         /*
1085          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1086          * from the struct scsi_device level firmware, do not allow
1087          * VPD Unit Serial to be emulated.
1088          *
1089          * Note this struct scsi_device could also be emulating VPD
1090          * information from its drivers/scsi LLD.  But for now we assume
1091          * it is doing 'the right thing' wrt a world wide unique
1092          * VPD Unit Serial Number that OS dependent multipath can depend on.
1093          */
1094         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1095                 pr_err("Underlying SCSI device firmware provided VPD"
1096                         " Unit Serial, ignoring request\n");
1097                 return -EOPNOTSUPP;
1098         }
1099
1100         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1101                 pr_err("Emulated VPD Unit Serial exceeds"
1102                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1103                 return -EOVERFLOW;
1104         }
1105         /*
1106          * Check to see if any active $FABRIC_MOD exports exist.  If they
1107          * do exist, fail here as changing this information on the fly
1108          * (underneath the initiator side OS dependent multipath code)
1109          * could cause negative effects.
1110          */
1111         if (dev->export_count) {
1112                 pr_err("Unable to set VPD Unit Serial while"
1113                         " active %d $FABRIC_MOD exports exist\n",
1114                         dev->export_count);
1115                 return -EINVAL;
1116         }
1117
1118         /*
1119          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1120          *
1121          * Also, strip any newline added from the userspace
1122          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1123          */
1124         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1125         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1126         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1127                         "%s", strstrip(buf));
1128         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1129
1130         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1131                         " %s\n", dev->t10_wwn.unit_serial);
1132
1133         return count;
1134 }
1135
1136 /*
1137  * VPD page 0x83 Protocol Identifier
1138  */
1139 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1140                 char *page)
1141 {
1142         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1143         struct t10_vpd *vpd;
1144         unsigned char buf[VPD_TMP_BUF_SIZE];
1145         ssize_t len = 0;
1146
1147         memset(buf, 0, VPD_TMP_BUF_SIZE);
1148
1149         spin_lock(&t10_wwn->t10_vpd_lock);
1150         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1151                 if (!vpd->protocol_identifier_set)
1152                         continue;
1153
1154                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1155
1156                 if (len + strlen(buf) >= PAGE_SIZE)
1157                         break;
1158
1159                 len += sprintf(page+len, "%s", buf);
1160         }
1161         spin_unlock(&t10_wwn->t10_vpd_lock);
1162
1163         return len;
1164 }
1165
1166 /*
1167  * Generic wrapper for dumping VPD identifiers by association.
1168  */
1169 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1170 static ssize_t target_wwn_##_name##_show(struct config_item *item,      \
1171                 char *page)                                             \
1172 {                                                                       \
1173         struct t10_wwn *t10_wwn = to_t10_wwn(item);                     \
1174         struct t10_vpd *vpd;                                            \
1175         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1176         ssize_t len = 0;                                                \
1177                                                                         \
1178         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1179         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1180                 if (vpd->association != _assoc)                         \
1181                         continue;                                       \
1182                                                                         \
1183                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1184                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1185                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1186                         break;                                          \
1187                 len += sprintf(page+len, "%s", buf);                    \
1188                                                                         \
1189                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1190                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1191                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1192                         break;                                          \
1193                 len += sprintf(page+len, "%s", buf);                    \
1194                                                                         \
1195                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1196                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1197                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1198                         break;                                          \
1199                 len += sprintf(page+len, "%s", buf);                    \
1200         }                                                               \
1201         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1202                                                                         \
1203         return len;                                                     \
1204 }
1205
1206 /* VPD page 0x83 Association: Logical Unit */
1207 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1208 /* VPD page 0x83 Association: Target Port */
1209 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1210 /* VPD page 0x83 Association: SCSI Target Device */
1211 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1212
1213 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1214 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1215 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1216 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1217 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1218
1219 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1220         &target_wwn_attr_vpd_unit_serial,
1221         &target_wwn_attr_vpd_protocol_identifier,
1222         &target_wwn_attr_vpd_assoc_logical_unit,
1223         &target_wwn_attr_vpd_assoc_target_port,
1224         &target_wwn_attr_vpd_assoc_scsi_target_device,
1225         NULL,
1226 };
1227
1228 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1229
1230 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1231
1232 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1233
1234 static struct se_device *pr_to_dev(struct config_item *item)
1235 {
1236         return container_of(to_config_group(item), struct se_device,
1237                         dev_pr_group);
1238 }
1239
1240 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1241                 char *page)
1242 {
1243         struct se_node_acl *se_nacl;
1244         struct t10_pr_registration *pr_reg;
1245         char i_buf[PR_REG_ISID_ID_LEN];
1246
1247         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1248
1249         pr_reg = dev->dev_pr_res_holder;
1250         if (!pr_reg)
1251                 return sprintf(page, "No SPC-3 Reservation holder\n");
1252
1253         se_nacl = pr_reg->pr_reg_nacl;
1254         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1255
1256         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1257                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1258                 se_nacl->initiatorname, i_buf);
1259 }
1260
1261 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1262                 char *page)
1263 {
1264         struct se_node_acl *se_nacl;
1265         ssize_t len;
1266
1267         se_nacl = dev->dev_reserved_node_acl;
1268         if (se_nacl) {
1269                 len = sprintf(page,
1270                               "SPC-2 Reservation: %s Initiator: %s\n",
1271                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1272                               se_nacl->initiatorname);
1273         } else {
1274                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1275         }
1276         return len;
1277 }
1278
1279 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1280 {
1281         struct se_device *dev = pr_to_dev(item);
1282         int ret;
1283
1284         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1285                 return sprintf(page, "Passthrough\n");
1286
1287         spin_lock(&dev->dev_reservation_lock);
1288         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1289                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1290         else
1291                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1292         spin_unlock(&dev->dev_reservation_lock);
1293         return ret;
1294 }
1295
1296 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1297                 char *page)
1298 {
1299         struct se_device *dev = pr_to_dev(item);
1300         ssize_t len = 0;
1301
1302         spin_lock(&dev->dev_reservation_lock);
1303         if (!dev->dev_pr_res_holder) {
1304                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1305         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1306                 len = sprintf(page, "SPC-3 Reservation: All Target"
1307                         " Ports registration\n");
1308         } else {
1309                 len = sprintf(page, "SPC-3 Reservation: Single"
1310                         " Target Port registration\n");
1311         }
1312
1313         spin_unlock(&dev->dev_reservation_lock);
1314         return len;
1315 }
1316
1317 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1318                 char *page)
1319 {
1320         return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1321 }
1322
1323
1324 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1325                 char *page)
1326 {
1327         struct se_device *dev = pr_to_dev(item);
1328         struct se_node_acl *se_nacl;
1329         struct se_portal_group *se_tpg;
1330         struct t10_pr_registration *pr_reg;
1331         const struct target_core_fabric_ops *tfo;
1332         ssize_t len = 0;
1333
1334         spin_lock(&dev->dev_reservation_lock);
1335         pr_reg = dev->dev_pr_res_holder;
1336         if (!pr_reg) {
1337                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1338                 goto out_unlock;
1339         }
1340
1341         se_nacl = pr_reg->pr_reg_nacl;
1342         se_tpg = se_nacl->se_tpg;
1343         tfo = se_tpg->se_tpg_tfo;
1344
1345         len += sprintf(page+len, "SPC-3 Reservation: %s"
1346                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1347                 tfo->tpg_get_wwn(se_tpg));
1348         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1349                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1350                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1351                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1352                 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1353
1354 out_unlock:
1355         spin_unlock(&dev->dev_reservation_lock);
1356         return len;
1357 }
1358
1359
1360 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1361                 char *page)
1362 {
1363         struct se_device *dev = pr_to_dev(item);
1364         const struct target_core_fabric_ops *tfo;
1365         struct t10_pr_registration *pr_reg;
1366         unsigned char buf[384];
1367         char i_buf[PR_REG_ISID_ID_LEN];
1368         ssize_t len = 0;
1369         int reg_count = 0;
1370
1371         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1372
1373         spin_lock(&dev->t10_pr.registration_lock);
1374         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1375                         pr_reg_list) {
1376
1377                 memset(buf, 0, 384);
1378                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1379                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1380                 core_pr_dump_initiator_port(pr_reg, i_buf,
1381                                         PR_REG_ISID_ID_LEN);
1382                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1383                         tfo->get_fabric_name(),
1384                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1385                         pr_reg->pr_res_generation);
1386
1387                 if (len + strlen(buf) >= PAGE_SIZE)
1388                         break;
1389
1390                 len += sprintf(page+len, "%s", buf);
1391                 reg_count++;
1392         }
1393         spin_unlock(&dev->t10_pr.registration_lock);
1394
1395         if (!reg_count)
1396                 len += sprintf(page+len, "None\n");
1397
1398         return len;
1399 }
1400
1401 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1402 {
1403         struct se_device *dev = pr_to_dev(item);
1404         struct t10_pr_registration *pr_reg;
1405         ssize_t len = 0;
1406
1407         spin_lock(&dev->dev_reservation_lock);
1408         pr_reg = dev->dev_pr_res_holder;
1409         if (pr_reg) {
1410                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1411                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1412         } else {
1413                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1414         }
1415
1416         spin_unlock(&dev->dev_reservation_lock);
1417         return len;
1418 }
1419
1420 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1421 {
1422         struct se_device *dev = pr_to_dev(item);
1423
1424         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1425                 return sprintf(page, "SPC_PASSTHROUGH\n");
1426         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1427                 return sprintf(page, "SPC2_RESERVATIONS\n");
1428         else
1429                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1430 }
1431
1432 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1433                 char *page)
1434 {
1435         struct se_device *dev = pr_to_dev(item);
1436
1437         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1438                 return 0;
1439
1440         return sprintf(page, "APTPL Bit Status: %s\n",
1441                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1442 }
1443
1444 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1445                 char *page)
1446 {
1447         struct se_device *dev = pr_to_dev(item);
1448
1449         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1450                 return 0;
1451
1452         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1453 }
1454
1455 enum {
1456         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1457         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1458         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1459         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1460 };
1461
1462 static match_table_t tokens = {
1463         {Opt_initiator_fabric, "initiator_fabric=%s"},
1464         {Opt_initiator_node, "initiator_node=%s"},
1465         {Opt_initiator_sid, "initiator_sid=%s"},
1466         {Opt_sa_res_key, "sa_res_key=%s"},
1467         {Opt_res_holder, "res_holder=%d"},
1468         {Opt_res_type, "res_type=%d"},
1469         {Opt_res_scope, "res_scope=%d"},
1470         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1471         {Opt_mapped_lun, "mapped_lun=%lld"},
1472         {Opt_target_fabric, "target_fabric=%s"},
1473         {Opt_target_node, "target_node=%s"},
1474         {Opt_tpgt, "tpgt=%d"},
1475         {Opt_port_rtpi, "port_rtpi=%d"},
1476         {Opt_target_lun, "target_lun=%lld"},
1477         {Opt_err, NULL}
1478 };
1479
1480 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1481                 const char *page, size_t count)
1482 {
1483         struct se_device *dev = pr_to_dev(item);
1484         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1485         unsigned char *t_fabric = NULL, *t_port = NULL;
1486         char *orig, *ptr, *opts;
1487         substring_t args[MAX_OPT_ARGS];
1488         unsigned long long tmp_ll;
1489         u64 sa_res_key = 0;
1490         u64 mapped_lun = 0, target_lun = 0;
1491         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1492         u16 tpgt = 0;
1493         u8 type = 0;
1494
1495         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1496                 return count;
1497         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1498                 return count;
1499
1500         if (dev->export_count) {
1501                 pr_debug("Unable to process APTPL metadata while"
1502                         " active fabric exports exist\n");
1503                 return -EINVAL;
1504         }
1505
1506         opts = kstrdup(page, GFP_KERNEL);
1507         if (!opts)
1508                 return -ENOMEM;
1509
1510         orig = opts;
1511         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1512                 if (!*ptr)
1513                         continue;
1514
1515                 token = match_token(ptr, tokens, args);
1516                 switch (token) {
1517                 case Opt_initiator_fabric:
1518                         i_fabric = match_strdup(args);
1519                         if (!i_fabric) {
1520                                 ret = -ENOMEM;
1521                                 goto out;
1522                         }
1523                         break;
1524                 case Opt_initiator_node:
1525                         i_port = match_strdup(args);
1526                         if (!i_port) {
1527                                 ret = -ENOMEM;
1528                                 goto out;
1529                         }
1530                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1531                                 pr_err("APTPL metadata initiator_node="
1532                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1533                                         PR_APTPL_MAX_IPORT_LEN);
1534                                 ret = -EINVAL;
1535                                 break;
1536                         }
1537                         break;
1538                 case Opt_initiator_sid:
1539                         isid = match_strdup(args);
1540                         if (!isid) {
1541                                 ret = -ENOMEM;
1542                                 goto out;
1543                         }
1544                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1545                                 pr_err("APTPL metadata initiator_isid"
1546                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1547                                         PR_REG_ISID_LEN);
1548                                 ret = -EINVAL;
1549                                 break;
1550                         }
1551                         break;
1552                 case Opt_sa_res_key:
1553                         ret = kstrtoull(args->from, 0, &tmp_ll);
1554                         if (ret < 0) {
1555                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1556                                 goto out;
1557                         }
1558                         sa_res_key = (u64)tmp_ll;
1559                         break;
1560                 /*
1561                  * PR APTPL Metadata for Reservation
1562                  */
1563                 case Opt_res_holder:
1564                         ret = match_int(args, &arg);
1565                         if (ret)
1566                                 goto out;
1567                         res_holder = arg;
1568                         break;
1569                 case Opt_res_type:
1570                         ret = match_int(args, &arg);
1571                         if (ret)
1572                                 goto out;
1573                         type = (u8)arg;
1574                         break;
1575                 case Opt_res_scope:
1576                         ret = match_int(args, &arg);
1577                         if (ret)
1578                                 goto out;
1579                         break;
1580                 case Opt_res_all_tg_pt:
1581                         ret = match_int(args, &arg);
1582                         if (ret)
1583                                 goto out;
1584                         all_tg_pt = (int)arg;
1585                         break;
1586                 case Opt_mapped_lun:
1587                         ret = match_int(args, &arg);
1588                         if (ret)
1589                                 goto out;
1590                         mapped_lun = (u64)arg;
1591                         break;
1592                 /*
1593                  * PR APTPL Metadata for Target Port
1594                  */
1595                 case Opt_target_fabric:
1596                         t_fabric = match_strdup(args);
1597                         if (!t_fabric) {
1598                                 ret = -ENOMEM;
1599                                 goto out;
1600                         }
1601                         break;
1602                 case Opt_target_node:
1603                         t_port = match_strdup(args);
1604                         if (!t_port) {
1605                                 ret = -ENOMEM;
1606                                 goto out;
1607                         }
1608                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1609                                 pr_err("APTPL metadata target_node="
1610                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1611                                         PR_APTPL_MAX_TPORT_LEN);
1612                                 ret = -EINVAL;
1613                                 break;
1614                         }
1615                         break;
1616                 case Opt_tpgt:
1617                         ret = match_int(args, &arg);
1618                         if (ret)
1619                                 goto out;
1620                         tpgt = (u16)arg;
1621                         break;
1622                 case Opt_port_rtpi:
1623                         ret = match_int(args, &arg);
1624                         if (ret)
1625                                 goto out;
1626                         break;
1627                 case Opt_target_lun:
1628                         ret = match_int(args, &arg);
1629                         if (ret)
1630                                 goto out;
1631                         target_lun = (u64)arg;
1632                         break;
1633                 default:
1634                         break;
1635                 }
1636         }
1637
1638         if (!i_port || !t_port || !sa_res_key) {
1639                 pr_err("Illegal parameters for APTPL registration\n");
1640                 ret = -EINVAL;
1641                 goto out;
1642         }
1643
1644         if (res_holder && !(type)) {
1645                 pr_err("Illegal PR type: 0x%02x for reservation"
1646                                 " holder\n", type);
1647                 ret = -EINVAL;
1648                 goto out;
1649         }
1650
1651         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1652                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1653                         res_holder, all_tg_pt, type);
1654 out:
1655         kfree(i_fabric);
1656         kfree(i_port);
1657         kfree(isid);
1658         kfree(t_fabric);
1659         kfree(t_port);
1660         kfree(orig);
1661         return (ret == 0) ? count : ret;
1662 }
1663
1664
1665 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1666 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1667 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1668 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1669 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1670 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1671 CONFIGFS_ATTR_RO(target_pr_, res_type);
1672 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1673 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1674
1675 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1676         &target_pr_attr_res_holder,
1677         &target_pr_attr_res_pr_all_tgt_pts,
1678         &target_pr_attr_res_pr_generation,
1679         &target_pr_attr_res_pr_holder_tg_port,
1680         &target_pr_attr_res_pr_registered_i_pts,
1681         &target_pr_attr_res_pr_type,
1682         &target_pr_attr_res_type,
1683         &target_pr_attr_res_aptpl_active,
1684         &target_pr_attr_res_aptpl_metadata,
1685         NULL,
1686 };
1687
1688 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1689
1690 /*  End functions for struct config_item_type tb_dev_pr_cit */
1691
1692 /*  Start functions for struct config_item_type tb_dev_cit */
1693
1694 static inline struct se_device *to_device(struct config_item *item)
1695 {
1696         return container_of(to_config_group(item), struct se_device, dev_group);
1697 }
1698
1699 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1700 {
1701         struct se_device *dev = to_device(item);
1702         int bl = 0;
1703         ssize_t read_bytes = 0;
1704
1705         transport_dump_dev_state(dev, page, &bl);
1706         read_bytes += bl;
1707         read_bytes += dev->transport->show_configfs_dev_params(dev,
1708                         page+read_bytes);
1709         return read_bytes;
1710 }
1711
1712 static ssize_t target_dev_control_store(struct config_item *item,
1713                 const char *page, size_t count)
1714 {
1715         struct se_device *dev = to_device(item);
1716
1717         return dev->transport->set_configfs_dev_params(dev, page, count);
1718 }
1719
1720 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1721 {
1722         struct se_device *dev = to_device(item);
1723
1724         if (!(dev->dev_flags & DF_USING_ALIAS))
1725                 return 0;
1726
1727         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1728 }
1729
1730 static ssize_t target_dev_alias_store(struct config_item *item,
1731                 const char *page, size_t count)
1732 {
1733         struct se_device *dev = to_device(item);
1734         struct se_hba *hba = dev->se_hba;
1735         ssize_t read_bytes;
1736
1737         if (count > (SE_DEV_ALIAS_LEN-1)) {
1738                 pr_err("alias count: %d exceeds"
1739                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1740                         SE_DEV_ALIAS_LEN-1);
1741                 return -EINVAL;
1742         }
1743
1744         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1745         if (!read_bytes)
1746                 return -EINVAL;
1747         if (dev->dev_alias[read_bytes - 1] == '\n')
1748                 dev->dev_alias[read_bytes - 1] = '\0';
1749
1750         dev->dev_flags |= DF_USING_ALIAS;
1751
1752         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1753                 config_item_name(&hba->hba_group.cg_item),
1754                 config_item_name(&dev->dev_group.cg_item),
1755                 dev->dev_alias);
1756
1757         return read_bytes;
1758 }
1759
1760 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1761 {
1762         struct se_device *dev = to_device(item);
1763
1764         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1765                 return 0;
1766
1767         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1768 }
1769
1770 static ssize_t target_dev_udev_path_store(struct config_item *item,
1771                 const char *page, size_t count)
1772 {
1773         struct se_device *dev = to_device(item);
1774         struct se_hba *hba = dev->se_hba;
1775         ssize_t read_bytes;
1776
1777         if (count > (SE_UDEV_PATH_LEN-1)) {
1778                 pr_err("udev_path count: %d exceeds"
1779                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1780                         SE_UDEV_PATH_LEN-1);
1781                 return -EINVAL;
1782         }
1783
1784         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1785                         "%s", page);
1786         if (!read_bytes)
1787                 return -EINVAL;
1788         if (dev->udev_path[read_bytes - 1] == '\n')
1789                 dev->udev_path[read_bytes - 1] = '\0';
1790
1791         dev->dev_flags |= DF_USING_UDEV_PATH;
1792
1793         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1794                 config_item_name(&hba->hba_group.cg_item),
1795                 config_item_name(&dev->dev_group.cg_item),
1796                 dev->udev_path);
1797
1798         return read_bytes;
1799 }
1800
1801 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1802 {
1803         struct se_device *dev = to_device(item);
1804
1805         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1806 }
1807
1808 static ssize_t target_dev_enable_store(struct config_item *item,
1809                 const char *page, size_t count)
1810 {
1811         struct se_device *dev = to_device(item);
1812         char *ptr;
1813         int ret;
1814
1815         ptr = strstr(page, "1");
1816         if (!ptr) {
1817                 pr_err("For dev_enable ops, only valid value"
1818                                 " is \"1\"\n");
1819                 return -EINVAL;
1820         }
1821
1822         ret = target_configure_device(dev);
1823         if (ret)
1824                 return ret;
1825         return count;
1826 }
1827
1828 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1829 {
1830         struct se_device *dev = to_device(item);
1831         struct config_item *lu_ci;
1832         struct t10_alua_lu_gp *lu_gp;
1833         struct t10_alua_lu_gp_member *lu_gp_mem;
1834         ssize_t len = 0;
1835
1836         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1837         if (!lu_gp_mem)
1838                 return 0;
1839
1840         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1841         lu_gp = lu_gp_mem->lu_gp;
1842         if (lu_gp) {
1843                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1844                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1845                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1846         }
1847         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1848
1849         return len;
1850 }
1851
1852 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1853                 const char *page, size_t count)
1854 {
1855         struct se_device *dev = to_device(item);
1856         struct se_hba *hba = dev->se_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         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1863         if (!lu_gp_mem)
1864                 return count;
1865
1866         if (count > LU_GROUP_NAME_BUF) {
1867                 pr_err("ALUA LU Group Alias too large!\n");
1868                 return -EINVAL;
1869         }
1870         memset(buf, 0, LU_GROUP_NAME_BUF);
1871         memcpy(buf, page, count);
1872         /*
1873          * Any ALUA logical unit alias besides "NULL" means we will be
1874          * making a new group association.
1875          */
1876         if (strcmp(strstrip(buf), "NULL")) {
1877                 /*
1878                  * core_alua_get_lu_gp_by_name() will increment reference to
1879                  * struct t10_alua_lu_gp.  This reference is released with
1880                  * core_alua_get_lu_gp_by_name below().
1881                  */
1882                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1883                 if (!lu_gp_new)
1884                         return -ENODEV;
1885         }
1886
1887         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1888         lu_gp = lu_gp_mem->lu_gp;
1889         if (lu_gp) {
1890                 /*
1891                  * Clearing an existing lu_gp association, and replacing
1892                  * with NULL
1893                  */
1894                 if (!lu_gp_new) {
1895                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1896                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1897                                 " %hu\n",
1898                                 config_item_name(&hba->hba_group.cg_item),
1899                                 config_item_name(&dev->dev_group.cg_item),
1900                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1901                                 lu_gp->lu_gp_id);
1902
1903                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1904                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1905
1906                         return count;
1907                 }
1908                 /*
1909                  * Removing existing association of lu_gp_mem with lu_gp
1910                  */
1911                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1912                 move = 1;
1913         }
1914         /*
1915          * Associate lu_gp_mem with lu_gp_new.
1916          */
1917         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1918         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1919
1920         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1921                 " core/alua/lu_gps/%s, ID: %hu\n",
1922                 (move) ? "Moving" : "Adding",
1923                 config_item_name(&hba->hba_group.cg_item),
1924                 config_item_name(&dev->dev_group.cg_item),
1925                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1926                 lu_gp_new->lu_gp_id);
1927
1928         core_alua_put_lu_gp_from_name(lu_gp_new);
1929         return count;
1930 }
1931
1932 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
1933 {
1934         struct se_device *dev = to_device(item);
1935         struct t10_alua_lba_map *map;
1936         struct t10_alua_lba_map_member *mem;
1937         char *b = page;
1938         int bl = 0;
1939         char state;
1940
1941         spin_lock(&dev->t10_alua.lba_map_lock);
1942         if (!list_empty(&dev->t10_alua.lba_map_list))
1943             bl += sprintf(b + bl, "%u %u\n",
1944                           dev->t10_alua.lba_map_segment_size,
1945                           dev->t10_alua.lba_map_segment_multiplier);
1946         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1947                 bl += sprintf(b + bl, "%llu %llu",
1948                               map->lba_map_first_lba, map->lba_map_last_lba);
1949                 list_for_each_entry(mem, &map->lba_map_mem_list,
1950                                     lba_map_mem_list) {
1951                         switch (mem->lba_map_mem_alua_state) {
1952                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1953                                 state = 'O';
1954                                 break;
1955                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1956                                 state = 'A';
1957                                 break;
1958                         case ALUA_ACCESS_STATE_STANDBY:
1959                                 state = 'S';
1960                                 break;
1961                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1962                                 state = 'U';
1963                                 break;
1964                         default:
1965                                 state = '.';
1966                                 break;
1967                         }
1968                         bl += sprintf(b + bl, " %d:%c",
1969                                       mem->lba_map_mem_alua_pg_id, state);
1970                 }
1971                 bl += sprintf(b + bl, "\n");
1972         }
1973         spin_unlock(&dev->t10_alua.lba_map_lock);
1974         return bl;
1975 }
1976
1977 static ssize_t target_dev_lba_map_store(struct config_item *item,
1978                 const char *page, size_t count)
1979 {
1980         struct se_device *dev = to_device(item);
1981         struct t10_alua_lba_map *lba_map = NULL;
1982         struct list_head lba_list;
1983         char *map_entries, *ptr;
1984         char state;
1985         int pg_num = -1, pg;
1986         int ret = 0, num = 0, pg_id, alua_state;
1987         unsigned long start_lba = -1, end_lba = -1;
1988         unsigned long segment_size = -1, segment_mult = -1;
1989
1990         map_entries = kstrdup(page, GFP_KERNEL);
1991         if (!map_entries)
1992                 return -ENOMEM;
1993
1994         INIT_LIST_HEAD(&lba_list);
1995         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1996                 if (!*ptr)
1997                         continue;
1998
1999                 if (num == 0) {
2000                         if (sscanf(ptr, "%lu %lu\n",
2001                                    &segment_size, &segment_mult) != 2) {
2002                                 pr_err("Invalid line %d\n", num);
2003                                 ret = -EINVAL;
2004                                 break;
2005                         }
2006                         num++;
2007                         continue;
2008                 }
2009                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2010                         pr_err("Invalid line %d\n", num);
2011                         ret = -EINVAL;
2012                         break;
2013                 }
2014                 ptr = strchr(ptr, ' ');
2015                 if (!ptr) {
2016                         pr_err("Invalid line %d, missing end lba\n", num);
2017                         ret = -EINVAL;
2018                         break;
2019                 }
2020                 ptr++;
2021                 ptr = strchr(ptr, ' ');
2022                 if (!ptr) {
2023                         pr_err("Invalid line %d, missing state definitions\n",
2024                                num);
2025                         ret = -EINVAL;
2026                         break;
2027                 }
2028                 ptr++;
2029                 lba_map = core_alua_allocate_lba_map(&lba_list,
2030                                                      start_lba, end_lba);
2031                 if (IS_ERR(lba_map)) {
2032                         ret = PTR_ERR(lba_map);
2033                         break;
2034                 }
2035                 pg = 0;
2036                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2037                         switch (state) {
2038                         case 'O':
2039                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2040                                 break;
2041                         case 'A':
2042                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2043                                 break;
2044                         case 'S':
2045                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2046                                 break;
2047                         case 'U':
2048                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2049                                 break;
2050                         default:
2051                                 pr_err("Invalid ALUA state '%c'\n", state);
2052                                 ret = -EINVAL;
2053                                 goto out;
2054                         }
2055
2056                         ret = core_alua_allocate_lba_map_mem(lba_map,
2057                                                              pg_id, alua_state);
2058                         if (ret) {
2059                                 pr_err("Invalid target descriptor %d:%c "
2060                                        "at line %d\n",
2061                                        pg_id, state, num);
2062                                 break;
2063                         }
2064                         pg++;
2065                         ptr = strchr(ptr, ' ');
2066                         if (ptr)
2067                                 ptr++;
2068                         else
2069                                 break;
2070                 }
2071                 if (pg_num == -1)
2072                     pg_num = pg;
2073                 else if (pg != pg_num) {
2074                         pr_err("Only %d from %d port groups definitions "
2075                                "at line %d\n", pg, pg_num, num);
2076                         ret = -EINVAL;
2077                         break;
2078                 }
2079                 num++;
2080         }
2081 out:
2082         if (ret) {
2083                 core_alua_free_lba_map(&lba_list);
2084                 count = ret;
2085         } else
2086                 core_alua_set_lba_map(dev, &lba_list,
2087                                       segment_size, segment_mult);
2088         kfree(map_entries);
2089         return count;
2090 }
2091
2092 CONFIGFS_ATTR_RO(target_dev_, info);
2093 CONFIGFS_ATTR_WO(target_dev_, control);
2094 CONFIGFS_ATTR(target_dev_, alias);
2095 CONFIGFS_ATTR(target_dev_, udev_path);
2096 CONFIGFS_ATTR(target_dev_, enable);
2097 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2098 CONFIGFS_ATTR(target_dev_, lba_map);
2099
2100 static struct configfs_attribute *target_core_dev_attrs[] = {
2101         &target_dev_attr_info,
2102         &target_dev_attr_control,
2103         &target_dev_attr_alias,
2104         &target_dev_attr_udev_path,
2105         &target_dev_attr_enable,
2106         &target_dev_attr_alua_lu_gp,
2107         &target_dev_attr_lba_map,
2108         NULL,
2109 };
2110
2111 static void target_core_dev_release(struct config_item *item)
2112 {
2113         struct config_group *dev_cg = to_config_group(item);
2114         struct se_device *dev =
2115                 container_of(dev_cg, struct se_device, dev_group);
2116
2117         kfree(dev_cg->default_groups);
2118         target_free_device(dev);
2119 }
2120
2121 static struct configfs_item_operations target_core_dev_item_ops = {
2122         .release                = target_core_dev_release,
2123 };
2124
2125 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2126
2127 /* End functions for struct config_item_type tb_dev_cit */
2128
2129 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2130
2131 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2132 {
2133         return container_of(to_config_group(item), struct t10_alua_lu_gp,
2134                         lu_gp_group);
2135 }
2136
2137 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2138 {
2139         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2140
2141         if (!lu_gp->lu_gp_valid_id)
2142                 return 0;
2143         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2144 }
2145
2146 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2147                 const char *page, size_t count)
2148 {
2149         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2150         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2151         unsigned long lu_gp_id;
2152         int ret;
2153
2154         ret = kstrtoul(page, 0, &lu_gp_id);
2155         if (ret < 0) {
2156                 pr_err("kstrtoul() returned %d for"
2157                         " lu_gp_id\n", ret);
2158                 return ret;
2159         }
2160         if (lu_gp_id > 0x0000ffff) {
2161                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2162                         " 0x0000ffff\n", lu_gp_id);
2163                 return -EINVAL;
2164         }
2165
2166         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2167         if (ret < 0)
2168                 return -EINVAL;
2169
2170         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2171                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2172                 config_item_name(&alua_lu_gp_cg->cg_item),
2173                 lu_gp->lu_gp_id);
2174
2175         return count;
2176 }
2177
2178 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2179 {
2180         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2181         struct se_device *dev;
2182         struct se_hba *hba;
2183         struct t10_alua_lu_gp_member *lu_gp_mem;
2184         ssize_t len = 0, cur_len;
2185         unsigned char buf[LU_GROUP_NAME_BUF];
2186
2187         memset(buf, 0, LU_GROUP_NAME_BUF);
2188
2189         spin_lock(&lu_gp->lu_gp_lock);
2190         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2191                 dev = lu_gp_mem->lu_gp_mem_dev;
2192                 hba = dev->se_hba;
2193
2194                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2195                         config_item_name(&hba->hba_group.cg_item),
2196                         config_item_name(&dev->dev_group.cg_item));
2197                 cur_len++; /* Extra byte for NULL terminator */
2198
2199                 if ((cur_len + len) > PAGE_SIZE) {
2200                         pr_warn("Ran out of lu_gp_show_attr"
2201                                 "_members buffer\n");
2202                         break;
2203                 }
2204                 memcpy(page+len, buf, cur_len);
2205                 len += cur_len;
2206         }
2207         spin_unlock(&lu_gp->lu_gp_lock);
2208
2209         return len;
2210 }
2211
2212 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2213 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2214
2215 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2216         &target_lu_gp_attr_lu_gp_id,
2217         &target_lu_gp_attr_members,
2218         NULL,
2219 };
2220
2221 static void target_core_alua_lu_gp_release(struct config_item *item)
2222 {
2223         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2224                         struct t10_alua_lu_gp, lu_gp_group);
2225
2226         core_alua_free_lu_gp(lu_gp);
2227 }
2228
2229 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2230         .release                = target_core_alua_lu_gp_release,
2231 };
2232
2233 static struct config_item_type target_core_alua_lu_gp_cit = {
2234         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2235         .ct_attrs               = target_core_alua_lu_gp_attrs,
2236         .ct_owner               = THIS_MODULE,
2237 };
2238
2239 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2240
2241 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2242
2243 static struct config_group *target_core_alua_create_lu_gp(
2244         struct config_group *group,
2245         const char *name)
2246 {
2247         struct t10_alua_lu_gp *lu_gp;
2248         struct config_group *alua_lu_gp_cg = NULL;
2249         struct config_item *alua_lu_gp_ci = NULL;
2250
2251         lu_gp = core_alua_allocate_lu_gp(name, 0);
2252         if (IS_ERR(lu_gp))
2253                 return NULL;
2254
2255         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2256         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2257
2258         config_group_init_type_name(alua_lu_gp_cg, name,
2259                         &target_core_alua_lu_gp_cit);
2260
2261         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2262                 " Group: core/alua/lu_gps/%s\n",
2263                 config_item_name(alua_lu_gp_ci));
2264
2265         return alua_lu_gp_cg;
2266
2267 }
2268
2269 static void target_core_alua_drop_lu_gp(
2270         struct config_group *group,
2271         struct config_item *item)
2272 {
2273         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2274                         struct t10_alua_lu_gp, lu_gp_group);
2275
2276         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2277                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2278                 config_item_name(item), lu_gp->lu_gp_id);
2279         /*
2280          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2281          * -> target_core_alua_lu_gp_release()
2282          */
2283         config_item_put(item);
2284 }
2285
2286 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2287         .make_group             = &target_core_alua_create_lu_gp,
2288         .drop_item              = &target_core_alua_drop_lu_gp,
2289 };
2290
2291 static struct config_item_type target_core_alua_lu_gps_cit = {
2292         .ct_item_ops            = NULL,
2293         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2294         .ct_owner               = THIS_MODULE,
2295 };
2296
2297 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2298
2299 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2300
2301 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2302 {
2303         return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2304                         tg_pt_gp_group);
2305 }
2306
2307 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2308                 char *page)
2309 {
2310         return sprintf(page, "%d\n",
2311                 atomic_read(&to_tg_pt_gp(item)->tg_pt_gp_alua_access_state));
2312 }
2313
2314 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2315                 const char *page, size_t count)
2316 {
2317         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2318         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2319         unsigned long tmp;
2320         int new_state, ret;
2321
2322         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2323                 pr_err("Unable to do implicit ALUA on non valid"
2324                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2325                 return -EINVAL;
2326         }
2327         if (!(dev->dev_flags & DF_CONFIGURED)) {
2328                 pr_err("Unable to set alua_access_state while device is"
2329                        " not configured\n");
2330                 return -ENODEV;
2331         }
2332
2333         ret = kstrtoul(page, 0, &tmp);
2334         if (ret < 0) {
2335                 pr_err("Unable to extract new ALUA access state from"
2336                                 " %s\n", page);
2337                 return ret;
2338         }
2339         new_state = (int)tmp;
2340
2341         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2342                 pr_err("Unable to process implicit configfs ALUA"
2343                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2344                 return -EINVAL;
2345         }
2346         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2347             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2348                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2349                 pr_err("Unable to process implicit configfs ALUA transition"
2350                        " while explicit ALUA management is enabled\n");
2351                 return -EINVAL;
2352         }
2353
2354         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2355                                         NULL, NULL, new_state, 0);
2356         return (!ret) ? count : -EINVAL;
2357 }
2358
2359 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2360                 char *page)
2361 {
2362         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2363         return sprintf(page, "%s\n",
2364                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2365 }
2366
2367 static ssize_t target_tg_pt_gp_alua_access_status_store(
2368                 struct config_item *item, const char *page, size_t count)
2369 {
2370         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2371         unsigned long tmp;
2372         int new_status, ret;
2373
2374         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2375                 pr_err("Unable to do set ALUA access status on non"
2376                         " valid tg_pt_gp ID: %hu\n",
2377                         tg_pt_gp->tg_pt_gp_valid_id);
2378                 return -EINVAL;
2379         }
2380
2381         ret = kstrtoul(page, 0, &tmp);
2382         if (ret < 0) {
2383                 pr_err("Unable to extract new ALUA access status"
2384                                 " from %s\n", page);
2385                 return ret;
2386         }
2387         new_status = (int)tmp;
2388
2389         if ((new_status != ALUA_STATUS_NONE) &&
2390             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2391             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2392                 pr_err("Illegal ALUA access status: 0x%02x\n",
2393                                 new_status);
2394                 return -EINVAL;
2395         }
2396
2397         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2398         return count;
2399 }
2400
2401 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2402                 char *page)
2403 {
2404         return core_alua_show_access_type(to_tg_pt_gp(item), page);
2405 }
2406
2407 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2408                 const char *page, size_t count)
2409 {
2410         return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2411 }
2412
2413 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit)                          \
2414 static ssize_t target_tg_pt_gp_alua_support_##_name##_show(             \
2415                 struct config_item *item, char *p)                      \
2416 {                                                                       \
2417         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2418         return sprintf(p, "%d\n",                                       \
2419                 !!(t->tg_pt_gp_alua_supported_states & _bit));          \
2420 }                                                                       \
2421                                                                         \
2422 static ssize_t target_tg_pt_gp_alua_support_##_name##_store(            \
2423                 struct config_item *item, const char *p, size_t c)      \
2424 {                                                                       \
2425         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2426         unsigned long tmp;                                              \
2427         int ret;                                                        \
2428                                                                         \
2429         if (!t->tg_pt_gp_valid_id) {                                    \
2430                 pr_err("Unable to do set ##_name ALUA state on non"     \
2431                        " valid tg_pt_gp ID: %hu\n",                     \
2432                        t->tg_pt_gp_valid_id);                           \
2433                 return -EINVAL;                                         \
2434         }                                                               \
2435                                                                         \
2436         ret = kstrtoul(p, 0, &tmp);                                     \
2437         if (ret < 0) {                                                  \
2438                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2439                 return -EINVAL;                                         \
2440         }                                                               \
2441         if (tmp > 1) {                                                  \
2442                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2443                 return -EINVAL;                                         \
2444         }                                                               \
2445         if (tmp)                                                        \
2446                 t->tg_pt_gp_alua_supported_states |= _bit;              \
2447         else                                                            \
2448                 t->tg_pt_gp_alua_supported_states &= ~_bit;             \
2449                                                                         \
2450         return c;                                                       \
2451 }
2452
2453 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2454 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2455 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2456 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2457 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2458 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2459 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2460
2461 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2462                 struct config_item *item, char *page)
2463 {
2464         return sprintf(page, "%d\n",
2465                 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2466 }
2467
2468 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2469                 struct config_item *item, const char *page, size_t count)
2470 {
2471         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2472         unsigned long tmp;
2473         int ret;
2474
2475         ret = kstrtoul(page, 0, &tmp);
2476         if (ret < 0) {
2477                 pr_err("Unable to extract alua_write_metadata\n");
2478                 return ret;
2479         }
2480
2481         if ((tmp != 0) && (tmp != 1)) {
2482                 pr_err("Illegal value for alua_write_metadata:"
2483                         " %lu\n", tmp);
2484                 return -EINVAL;
2485         }
2486         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2487
2488         return count;
2489 }
2490
2491 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2492                 char *page)
2493 {
2494         return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2495 }
2496
2497 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2498                 const char *page, size_t count)
2499 {
2500         return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2501                         count);
2502 }
2503
2504 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2505                 char *page)
2506 {
2507         return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2508 }
2509
2510 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2511                 const char *page, size_t count)
2512 {
2513         return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2514                         count);
2515 }
2516
2517 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2518                 struct config_item *item, char *page)
2519 {
2520         return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2521 }
2522
2523 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2524                 struct config_item *item, const char *page, size_t count)
2525 {
2526         return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2527                         count);
2528 }
2529
2530 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2531                 char *page)
2532 {
2533         return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2534 }
2535
2536 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2537                 const char *page, size_t count)
2538 {
2539         return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2540 }
2541
2542 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2543                 char *page)
2544 {
2545         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2546
2547         if (!tg_pt_gp->tg_pt_gp_valid_id)
2548                 return 0;
2549         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2550 }
2551
2552 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2553                 const char *page, size_t count)
2554 {
2555         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2556         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2557         unsigned long tg_pt_gp_id;
2558         int ret;
2559
2560         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2561         if (ret < 0) {
2562                 pr_err("kstrtoul() returned %d for"
2563                         " tg_pt_gp_id\n", ret);
2564                 return ret;
2565         }
2566         if (tg_pt_gp_id > 0x0000ffff) {
2567                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2568                         " 0x0000ffff\n", tg_pt_gp_id);
2569                 return -EINVAL;
2570         }
2571
2572         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2573         if (ret < 0)
2574                 return -EINVAL;
2575
2576         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2577                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2578                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2579                 tg_pt_gp->tg_pt_gp_id);
2580
2581         return count;
2582 }
2583
2584 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2585                 char *page)
2586 {
2587         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2588         struct se_lun *lun;
2589         ssize_t len = 0, cur_len;
2590         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2591
2592         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2593
2594         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2595         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2596                         lun_tg_pt_gp_link) {
2597                 struct se_portal_group *tpg = lun->lun_tpg;
2598
2599                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2600                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2601                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2602                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2603                         config_item_name(&lun->lun_group.cg_item));
2604                 cur_len++; /* Extra byte for NULL terminator */
2605
2606                 if ((cur_len + len) > PAGE_SIZE) {
2607                         pr_warn("Ran out of lu_gp_show_attr"
2608                                 "_members buffer\n");
2609                         break;
2610                 }
2611                 memcpy(page+len, buf, cur_len);
2612                 len += cur_len;
2613         }
2614         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2615
2616         return len;
2617 }
2618
2619 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2620 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2621 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2622 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2623 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2624 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2625 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2626 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2627 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2628 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2629 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2630 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2631 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2632 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2633 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2634 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2635 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2636
2637 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2638         &target_tg_pt_gp_attr_alua_access_state,
2639         &target_tg_pt_gp_attr_alua_access_status,
2640         &target_tg_pt_gp_attr_alua_access_type,
2641         &target_tg_pt_gp_attr_alua_support_transitioning,
2642         &target_tg_pt_gp_attr_alua_support_offline,
2643         &target_tg_pt_gp_attr_alua_support_lba_dependent,
2644         &target_tg_pt_gp_attr_alua_support_unavailable,
2645         &target_tg_pt_gp_attr_alua_support_standby,
2646         &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2647         &target_tg_pt_gp_attr_alua_support_active_optimized,
2648         &target_tg_pt_gp_attr_alua_write_metadata,
2649         &target_tg_pt_gp_attr_nonop_delay_msecs,
2650         &target_tg_pt_gp_attr_trans_delay_msecs,
2651         &target_tg_pt_gp_attr_implicit_trans_secs,
2652         &target_tg_pt_gp_attr_preferred,
2653         &target_tg_pt_gp_attr_tg_pt_gp_id,
2654         &target_tg_pt_gp_attr_members,
2655         NULL,
2656 };
2657
2658 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2659 {
2660         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2661                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2662
2663         core_alua_free_tg_pt_gp(tg_pt_gp);
2664 }
2665
2666 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2667         .release                = target_core_alua_tg_pt_gp_release,
2668 };
2669
2670 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2671         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2672         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2673         .ct_owner               = THIS_MODULE,
2674 };
2675
2676 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2677
2678 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2679
2680 static struct config_group *target_core_alua_create_tg_pt_gp(
2681         struct config_group *group,
2682         const char *name)
2683 {
2684         struct t10_alua *alua = container_of(group, struct t10_alua,
2685                                         alua_tg_pt_gps_group);
2686         struct t10_alua_tg_pt_gp *tg_pt_gp;
2687         struct config_group *alua_tg_pt_gp_cg = NULL;
2688         struct config_item *alua_tg_pt_gp_ci = NULL;
2689
2690         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2691         if (!tg_pt_gp)
2692                 return NULL;
2693
2694         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2695         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2696
2697         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2698                         &target_core_alua_tg_pt_gp_cit);
2699
2700         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2701                 " Group: alua/tg_pt_gps/%s\n",
2702                 config_item_name(alua_tg_pt_gp_ci));
2703
2704         return alua_tg_pt_gp_cg;
2705 }
2706
2707 static void target_core_alua_drop_tg_pt_gp(
2708         struct config_group *group,
2709         struct config_item *item)
2710 {
2711         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2712                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2713
2714         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2715                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2716                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2717         /*
2718          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2719          * -> target_core_alua_tg_pt_gp_release().
2720          */
2721         config_item_put(item);
2722 }
2723
2724 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2725         .make_group             = &target_core_alua_create_tg_pt_gp,
2726         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2727 };
2728
2729 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2730
2731 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2732
2733 /* Start functions for struct config_item_type target_core_alua_cit */
2734
2735 /*
2736  * target_core_alua_cit is a ConfigFS group that lives under
2737  * /sys/kernel/config/target/core/alua.  There are default groups
2738  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2739  * target_core_alua_cit in target_core_init_configfs() below.
2740  */
2741 static struct config_item_type target_core_alua_cit = {
2742         .ct_item_ops            = NULL,
2743         .ct_attrs               = NULL,
2744         .ct_owner               = THIS_MODULE,
2745 };
2746
2747 /* End functions for struct config_item_type target_core_alua_cit */
2748
2749 /* Start functions for struct config_item_type tb_dev_stat_cit */
2750
2751 static struct config_group *target_core_stat_mkdir(
2752         struct config_group *group,
2753         const char *name)
2754 {
2755         return ERR_PTR(-ENOSYS);
2756 }
2757
2758 static void target_core_stat_rmdir(
2759         struct config_group *group,
2760         struct config_item *item)
2761 {
2762         return;
2763 }
2764
2765 static struct configfs_group_operations target_core_stat_group_ops = {
2766         .make_group             = &target_core_stat_mkdir,
2767         .drop_item              = &target_core_stat_rmdir,
2768 };
2769
2770 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2771
2772 /* End functions for struct config_item_type tb_dev_stat_cit */
2773
2774 /* Start functions for struct config_item_type target_core_hba_cit */
2775
2776 static struct config_group *target_core_make_subdev(
2777         struct config_group *group,
2778         const char *name)
2779 {
2780         struct t10_alua_tg_pt_gp *tg_pt_gp;
2781         struct config_item *hba_ci = &group->cg_item;
2782         struct se_hba *hba = item_to_hba(hba_ci);
2783         struct target_backend *tb = hba->backend;
2784         struct se_device *dev;
2785         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2786         struct config_group *dev_stat_grp = NULL;
2787         int errno = -ENOMEM, ret;
2788
2789         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2790         if (ret)
2791                 return ERR_PTR(ret);
2792
2793         dev = target_alloc_device(hba, name);
2794         if (!dev)
2795                 goto out_unlock;
2796
2797         dev_cg = &dev->dev_group;
2798
2799         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2800                         GFP_KERNEL);
2801         if (!dev_cg->default_groups)
2802                 goto out_free_device;
2803
2804         config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
2805         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2806                         &tb->tb_dev_attrib_cit);
2807         config_group_init_type_name(&dev->dev_pr_group, "pr",
2808                         &tb->tb_dev_pr_cit);
2809         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2810                         &tb->tb_dev_wwn_cit);
2811         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2812                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2813         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2814                         "statistics", &tb->tb_dev_stat_cit);
2815
2816         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2817         dev_cg->default_groups[1] = &dev->dev_pr_group;
2818         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2819         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2820         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2821         dev_cg->default_groups[5] = NULL;
2822         /*
2823          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2824          */
2825         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2826         if (!tg_pt_gp)
2827                 goto out_free_dev_cg_default_groups;
2828         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2829
2830         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2831         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2832                                 GFP_KERNEL);
2833         if (!tg_pt_gp_cg->default_groups) {
2834                 pr_err("Unable to allocate tg_pt_gp_cg->"
2835                                 "default_groups\n");
2836                 goto out_free_tg_pt_gp;
2837         }
2838
2839         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2840                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2841         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2842         tg_pt_gp_cg->default_groups[1] = NULL;
2843         /*
2844          * Add core/$HBA/$DEV/statistics/ default groups
2845          */
2846         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2847         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2848                                 GFP_KERNEL);
2849         if (!dev_stat_grp->default_groups) {
2850                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2851                 goto out_free_tg_pt_gp_cg_default_groups;
2852         }
2853         target_stat_setup_dev_default_groups(dev);
2854
2855         mutex_unlock(&hba->hba_access_mutex);
2856         return dev_cg;
2857
2858 out_free_tg_pt_gp_cg_default_groups:
2859         kfree(tg_pt_gp_cg->default_groups);
2860 out_free_tg_pt_gp:
2861         core_alua_free_tg_pt_gp(tg_pt_gp);
2862 out_free_dev_cg_default_groups:
2863         kfree(dev_cg->default_groups);
2864 out_free_device:
2865         target_free_device(dev);
2866 out_unlock:
2867         mutex_unlock(&hba->hba_access_mutex);
2868         return ERR_PTR(errno);
2869 }
2870
2871 static void target_core_drop_subdev(
2872         struct config_group *group,
2873         struct config_item *item)
2874 {
2875         struct config_group *dev_cg = to_config_group(item);
2876         struct se_device *dev =
2877                 container_of(dev_cg, struct se_device, dev_group);
2878         struct se_hba *hba;
2879         struct config_item *df_item;
2880         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2881         int i;
2882
2883         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2884
2885         mutex_lock(&hba->hba_access_mutex);
2886
2887         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2888         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2889                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2890                 dev_stat_grp->default_groups[i] = NULL;
2891                 config_item_put(df_item);
2892         }
2893         kfree(dev_stat_grp->default_groups);
2894
2895         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2896         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2897                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2898                 tg_pt_gp_cg->default_groups[i] = NULL;
2899                 config_item_put(df_item);
2900         }
2901         kfree(tg_pt_gp_cg->default_groups);
2902         /*
2903          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2904          * directly from target_core_alua_tg_pt_gp_release().
2905          */
2906         dev->t10_alua.default_tg_pt_gp = NULL;
2907
2908         for (i = 0; dev_cg->default_groups[i]; i++) {
2909                 df_item = &dev_cg->default_groups[i]->cg_item;
2910                 dev_cg->default_groups[i] = NULL;
2911                 config_item_put(df_item);
2912         }
2913         /*
2914          * se_dev is released from target_core_dev_item_ops->release()
2915          */
2916         config_item_put(item);
2917         mutex_unlock(&hba->hba_access_mutex);
2918 }
2919
2920 static struct configfs_group_operations target_core_hba_group_ops = {
2921         .make_group             = target_core_make_subdev,
2922         .drop_item              = target_core_drop_subdev,
2923 };
2924
2925
2926 static inline struct se_hba *to_hba(struct config_item *item)
2927 {
2928         return container_of(to_config_group(item), struct se_hba, hba_group);
2929 }
2930
2931 static ssize_t target_hba_info_show(struct config_item *item, char *page)
2932 {
2933         struct se_hba *hba = to_hba(item);
2934
2935         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2936                         hba->hba_id, hba->backend->ops->name,
2937                         TARGET_CORE_VERSION);
2938 }
2939
2940 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
2941 {
2942         struct se_hba *hba = to_hba(item);
2943         int hba_mode = 0;
2944
2945         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2946                 hba_mode = 1;
2947
2948         return sprintf(page, "%d\n", hba_mode);
2949 }
2950
2951 static ssize_t target_hba_mode_store(struct config_item *item,
2952                 const char *page, size_t count)
2953 {
2954         struct se_hba *hba = to_hba(item);
2955         unsigned long mode_flag;
2956         int ret;
2957
2958         if (hba->backend->ops->pmode_enable_hba == NULL)
2959                 return -EINVAL;
2960
2961         ret = kstrtoul(page, 0, &mode_flag);
2962         if (ret < 0) {
2963                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2964                 return ret;
2965         }
2966
2967         if (hba->dev_count) {
2968                 pr_err("Unable to set hba_mode with active devices\n");
2969                 return -EINVAL;
2970         }
2971
2972         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
2973         if (ret < 0)
2974                 return -EINVAL;
2975         if (ret > 0)
2976                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2977         else if (ret == 0)
2978                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2979
2980         return count;
2981 }
2982
2983 CONFIGFS_ATTR_RO(target_, hba_info);
2984 CONFIGFS_ATTR(target_, hba_mode);
2985
2986 static void target_core_hba_release(struct config_item *item)
2987 {
2988         struct se_hba *hba = container_of(to_config_group(item),
2989                                 struct se_hba, hba_group);
2990         core_delete_hba(hba);
2991 }
2992
2993 static struct configfs_attribute *target_core_hba_attrs[] = {
2994         &target_attr_hba_info,
2995         &target_attr_hba_mode,
2996         NULL,
2997 };
2998
2999 static struct configfs_item_operations target_core_hba_item_ops = {
3000         .release                = target_core_hba_release,
3001 };
3002
3003 static struct config_item_type target_core_hba_cit = {
3004         .ct_item_ops            = &target_core_hba_item_ops,
3005         .ct_group_ops           = &target_core_hba_group_ops,
3006         .ct_attrs               = target_core_hba_attrs,
3007         .ct_owner               = THIS_MODULE,
3008 };
3009
3010 static struct config_group *target_core_call_addhbatotarget(
3011         struct config_group *group,
3012         const char *name)
3013 {
3014         char *se_plugin_str, *str, *str2;
3015         struct se_hba *hba;
3016         char buf[TARGET_CORE_NAME_MAX_LEN];
3017         unsigned long plugin_dep_id = 0;
3018         int ret;
3019
3020         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3021         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3022                 pr_err("Passed *name strlen(): %d exceeds"
3023                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3024                         TARGET_CORE_NAME_MAX_LEN);
3025                 return ERR_PTR(-ENAMETOOLONG);
3026         }
3027         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3028
3029         str = strstr(buf, "_");
3030         if (!str) {
3031                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3032                 return ERR_PTR(-EINVAL);
3033         }
3034         se_plugin_str = buf;
3035         /*
3036          * Special case for subsystem plugins that have "_" in their names.
3037          * Namely rd_direct and rd_mcp..
3038          */
3039         str2 = strstr(str+1, "_");
3040         if (str2) {
3041                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3042                 str2++; /* Skip to start of plugin dependent ID */
3043                 str = str2;
3044         } else {
3045                 *str = '\0'; /* Terminate for *se_plugin_str */
3046                 str++; /* Skip to start of plugin dependent ID */
3047         }
3048
3049         ret = kstrtoul(str, 0, &plugin_dep_id);
3050         if (ret < 0) {
3051                 pr_err("kstrtoul() returned %d for"
3052                                 " plugin_dep_id\n", ret);
3053                 return ERR_PTR(ret);
3054         }
3055         /*
3056          * Load up TCM subsystem plugins if they have not already been loaded.
3057          */
3058         transport_subsystem_check_init();
3059
3060         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3061         if (IS_ERR(hba))
3062                 return ERR_CAST(hba);
3063
3064         config_group_init_type_name(&hba->hba_group, name,
3065                         &target_core_hba_cit);
3066
3067         return &hba->hba_group;
3068 }
3069
3070 static void target_core_call_delhbafromtarget(
3071         struct config_group *group,
3072         struct config_item *item)
3073 {
3074         /*
3075          * core_delete_hba() is called from target_core_hba_item_ops->release()
3076          * -> target_core_hba_release()
3077          */
3078         config_item_put(item);
3079 }
3080
3081 static struct configfs_group_operations target_core_group_ops = {
3082         .make_group     = target_core_call_addhbatotarget,
3083         .drop_item      = target_core_call_delhbafromtarget,
3084 };
3085
3086 static struct config_item_type target_core_cit = {
3087         .ct_item_ops    = NULL,
3088         .ct_group_ops   = &target_core_group_ops,
3089         .ct_attrs       = NULL,
3090         .ct_owner       = THIS_MODULE,
3091 };
3092
3093 /* Stop functions for struct config_item_type target_core_hba_cit */
3094
3095 void target_setup_backend_cits(struct target_backend *tb)
3096 {
3097         target_core_setup_dev_cit(tb);
3098         target_core_setup_dev_attrib_cit(tb);
3099         target_core_setup_dev_pr_cit(tb);
3100         target_core_setup_dev_wwn_cit(tb);
3101         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3102         target_core_setup_dev_stat_cit(tb);
3103 }
3104
3105 static int __init target_core_init_configfs(void)
3106 {
3107         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3108         struct config_group *lu_gp_cg = NULL;
3109         struct configfs_subsystem *subsys = &target_core_fabrics;
3110         struct t10_alua_lu_gp *lu_gp;
3111         int ret;
3112
3113         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3114                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3115                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3116
3117         config_group_init(&subsys->su_group);
3118         mutex_init(&subsys->su_mutex);
3119
3120         ret = init_se_kmem_caches();
3121         if (ret < 0)
3122                 return ret;
3123         /*
3124          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3125          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3126          */
3127         target_cg = &subsys->su_group;
3128         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3129                                 GFP_KERNEL);
3130         if (!target_cg->default_groups) {
3131                 pr_err("Unable to allocate target_cg->default_groups\n");
3132                 ret = -ENOMEM;
3133                 goto out_global;
3134         }
3135
3136         config_group_init_type_name(&target_core_hbagroup,
3137                         "core", &target_core_cit);
3138         target_cg->default_groups[0] = &target_core_hbagroup;
3139         target_cg->default_groups[1] = NULL;
3140         /*
3141          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3142          */
3143         hba_cg = &target_core_hbagroup;
3144         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3145                                 GFP_KERNEL);
3146         if (!hba_cg->default_groups) {
3147                 pr_err("Unable to allocate hba_cg->default_groups\n");
3148                 ret = -ENOMEM;
3149                 goto out_global;
3150         }
3151         config_group_init_type_name(&alua_group,
3152                         "alua", &target_core_alua_cit);
3153         hba_cg->default_groups[0] = &alua_group;
3154         hba_cg->default_groups[1] = NULL;
3155         /*
3156          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3157          * groups under /sys/kernel/config/target/core/alua/
3158          */
3159         alua_cg = &alua_group;
3160         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3161                         GFP_KERNEL);
3162         if (!alua_cg->default_groups) {
3163                 pr_err("Unable to allocate alua_cg->default_groups\n");
3164                 ret = -ENOMEM;
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                 ret = -ENOMEM;
3178                 goto out_global;
3179         }
3180
3181         lu_gp_cg = &alua_lu_gps_group;
3182         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3183                         GFP_KERNEL);
3184         if (!lu_gp_cg->default_groups) {
3185                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3186                 ret = -ENOMEM;
3187                 goto out_global;
3188         }
3189
3190         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3191                                 &target_core_alua_lu_gp_cit);
3192         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3193         lu_gp_cg->default_groups[1] = NULL;
3194         default_lu_gp = lu_gp;
3195         /*
3196          * Register the target_core_mod subsystem with configfs.
3197          */
3198         ret = configfs_register_subsystem(subsys);
3199         if (ret < 0) {
3200                 pr_err("Error %d while registering subsystem %s\n",
3201                         ret, subsys->su_group.cg_item.ci_namebuf);
3202                 goto out_global;
3203         }
3204         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3205                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3206                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3207         /*
3208          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3209          */
3210         ret = rd_module_init();
3211         if (ret < 0)
3212                 goto out;
3213
3214         ret = core_dev_setup_virtual_lun0();
3215         if (ret < 0)
3216                 goto out;
3217
3218         ret = target_xcopy_setup_pt();
3219         if (ret < 0)
3220                 goto out;
3221
3222         return 0;
3223
3224 out:
3225         configfs_unregister_subsystem(subsys);
3226         core_dev_release_virtual_lun0();
3227         rd_module_exit();
3228 out_global:
3229         if (default_lu_gp) {
3230                 core_alua_free_lu_gp(default_lu_gp);
3231                 default_lu_gp = NULL;
3232         }
3233         if (lu_gp_cg)
3234                 kfree(lu_gp_cg->default_groups);
3235         if (alua_cg)
3236                 kfree(alua_cg->default_groups);
3237         if (hba_cg)
3238                 kfree(hba_cg->default_groups);
3239         kfree(target_cg->default_groups);
3240         release_se_kmem_caches();
3241         return ret;
3242 }
3243
3244 static void __exit target_core_exit_configfs(void)
3245 {
3246         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3247         struct config_item *item;
3248         int i;
3249
3250         lu_gp_cg = &alua_lu_gps_group;
3251         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3252                 item = &lu_gp_cg->default_groups[i]->cg_item;
3253                 lu_gp_cg->default_groups[i] = NULL;
3254                 config_item_put(item);
3255         }
3256         kfree(lu_gp_cg->default_groups);
3257         lu_gp_cg->default_groups = NULL;
3258
3259         alua_cg = &alua_group;
3260         for (i = 0; alua_cg->default_groups[i]; i++) {
3261                 item = &alua_cg->default_groups[i]->cg_item;
3262                 alua_cg->default_groups[i] = NULL;
3263                 config_item_put(item);
3264         }
3265         kfree(alua_cg->default_groups);
3266         alua_cg->default_groups = NULL;
3267
3268         hba_cg = &target_core_hbagroup;
3269         for (i = 0; hba_cg->default_groups[i]; i++) {
3270                 item = &hba_cg->default_groups[i]->cg_item;
3271                 hba_cg->default_groups[i] = NULL;
3272                 config_item_put(item);
3273         }
3274         kfree(hba_cg->default_groups);
3275         hba_cg->default_groups = NULL;
3276         /*
3277          * We expect subsys->su_group.default_groups to be released
3278          * by configfs subsystem provider logic..
3279          */
3280         configfs_unregister_subsystem(&target_core_fabrics);
3281         kfree(target_core_fabrics.su_group.default_groups);
3282
3283         core_alua_free_lu_gp(default_lu_gp);
3284         default_lu_gp = NULL;
3285
3286         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3287                         " Infrastructure\n");
3288
3289         core_dev_release_virtual_lun0();
3290         rd_module_exit();
3291         target_xcopy_release_pt();
3292         release_se_kmem_caches();
3293 }
3294
3295 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3296 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3297 MODULE_LICENSE("GPL");
3298
3299 module_init(target_core_init_configfs);
3300 module_exit(target_core_exit_configfs);