drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * (c) Copyright 2008-2013 Datera, Inc.
   7  *
   8  * Nicholas A. Bellinger <nab@kernel.org>
   9  *
  10  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <generated/utsrelease.h>
  26 #include <linux/utsname.h>
  27 #include <linux/init.h>
  28 #include <linux/fs.h>
  29 #include <linux/namei.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/delay.h>
  33 #include <linux/unistd.h>
  34 #include <linux/string.h>
  35 #include <linux/parser.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38 #include <linux/spinlock.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_backend.h>
  42 #include <target/target_core_fabric.h>
  43 #include <target/target_core_fabric_configfs.h>
  44 #include <target/target_core_configfs.h>
  45 #include <target/configfs_macros.h>
  46
  47 #include "target_core_internal.h"
  48 #include "target_core_alua.h"
  49 #include "target_core_pr.h"
  50 #include "target_core_rd.h"
  51 #include "target_core_xcopy.h"
  52
  53 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  54 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  55 {                                                                       \
  56         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  57                                                                         \
  58         cit->ct_item_ops = _item_ops;                                   \
  59         cit->ct_group_ops = _group_ops;                                 \
  60         cit->ct_attrs = _attrs;                                         \
  61         cit->ct_owner = tb->ops->owner;                                 \
  62         pr_debug("Setup generic %s\n", __stringify(_name));             \
  63 }
  64
  65 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  66 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  67 {                                                                       \
  68         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  69                                                                         \
  70         cit->ct_item_ops = _item_ops;                                   \
  71         cit->ct_group_ops = _group_ops;                                 \
  72         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  73         cit->ct_owner = tb->ops->owner;                                 \
  74         pr_debug("Setup generic %s\n", __stringify(_name));             \
  75 }
  76
  77 extern struct t10_alua_lu_gp *default_lu_gp;
  78
  79 static LIST_HEAD(g_tf_list);
  80 static DEFINE_MUTEX(g_tf_lock);
  81
  82 struct target_core_configfs_attribute {
  83         struct configfs_attribute attr;
  84         ssize_t (*show)(void *, char *);
  85         ssize_t (*store)(void *, const char *, size_t);
  86 };
  87
  88 static struct config_group target_core_hbagroup;
  89 static struct config_group alua_group;
  90 static struct config_group alua_lu_gps_group;
  91
  92 static inline struct se_hba *
  93 item_to_hba(struct config_item *item)
  94 {
  95         return container_of(to_config_group(item), struct se_hba, hba_group);
  96 }
  97
  98 /*
  99  * Attributes for /sys/kernel/config/target/
 100  */
 101 static ssize_t target_core_attr_show(struct config_item *item,
 102                                       struct configfs_attribute *attr,
 103                                       char *page)
 104 {
 105         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
 106                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
 107                 utsname()->sysname, utsname()->machine);
 108 }
 109
 110 static struct configfs_item_operations target_core_fabric_item_ops = {
 111         .show_attribute = target_core_attr_show,
 112 };
 113
 114 static struct configfs_attribute target_core_item_attr_version = {
 115         .ca_owner       = THIS_MODULE,
 116         .ca_name        = "version",
 117         .ca_mode        = S_IRUGO,
 118 };
 119
 120 static struct target_fabric_configfs *target_core_get_fabric(
 121         const char *name)
 122 {
 123         struct target_fabric_configfs *tf;
 124
 125         if (!name)
 126                 return NULL;
 127
 128         mutex_lock(&g_tf_lock);
 129         list_for_each_entry(tf, &g_tf_list, tf_list) {
 130                 if (!strcmp(tf->tf_ops->name, name)) {
 131                         atomic_inc(&tf->tf_access_cnt);
 132                         mutex_unlock(&g_tf_lock);
 133                         return tf;
 134                 }
 135         }
 136         mutex_unlock(&g_tf_lock);
 137
 138         return NULL;
 139 }
 140
 141 /*
 142  * Called from struct target_core_group_ops->make_group()
 143  */
 144 static struct config_group *target_core_register_fabric(
 145         struct config_group *group,
 146         const char *name)
 147 {
 148         struct target_fabric_configfs *tf;
 149         int ret;
 150
 151         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 152                         " %s\n", group, name);
 153
 154         tf = target_core_get_fabric(name);
 155         if (!tf) {
 156                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 157                          name);
 158
 159                 /*
 160                  * Below are some hardcoded request_module() calls to automatically
 161                  * local fabric modules when the following is called:
 162                  *
 163                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 164                  *
 165                  * Note that this does not limit which TCM fabric module can be
 166                  * registered, but simply provids auto loading logic for modules with
 167                  * mkdir(2) system calls with known TCM fabric modules.
 168                  */
 169
 170                 if (!strncmp(name, "iscsi", 5)) {
 171                         /*
 172                          * Automatically load the LIO Target fabric module when the
 173                          * following is called:
 174                          *
 175                          * mkdir -p $CONFIGFS/target/iscsi
 176                          */
 177                         ret = request_module("iscsi_target_mod");
 178                         if (ret < 0) {
 179                                 pr_debug("request_module() failed for"
 180                                          " iscsi_target_mod.ko: %d\n", ret);
 181                                 return ERR_PTR(-EINVAL);
 182                         }
 183                 } else if (!strncmp(name, "loopback", 8)) {
 184                         /*
 185                          * Automatically load the tcm_loop fabric module when the
 186                          * following is called:
 187                          *
 188                          * mkdir -p $CONFIGFS/target/loopback
 189                          */
 190                         ret = request_module("tcm_loop");
 191                         if (ret < 0) {
 192                                 pr_debug("request_module() failed for"
 193                                          " tcm_loop.ko: %d\n", ret);
 194                                 return ERR_PTR(-EINVAL);
 195                         }
 196                 }
 197
 198                 tf = target_core_get_fabric(name);
 199         }
 200
 201         if (!tf) {
 202                 pr_debug("target_core_get_fabric() failed for %s\n",
 203                          name);
 204                 return ERR_PTR(-EINVAL);
 205         }
 206         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 207                         " %s\n", tf->tf_ops->name);
 208         /*
 209          * On a successful target_core_get_fabric() look, the returned
 210          * struct target_fabric_configfs *tf will contain a usage reference.
 211          */
 212         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 213                         &tf->tf_wwn_cit);
 214
 215         tf->tf_group.default_groups = tf->tf_default_groups;
 216         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 217         tf->tf_group.default_groups[1] = NULL;
 218
 219         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 220         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 221                         &tf->tf_discovery_cit);
 222
 223         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 224                         " %s\n", tf->tf_group.cg_item.ci_name);
 225         return &tf->tf_group;
 226 }
 227
 228 /*
 229  * Called from struct target_core_group_ops->drop_item()
 230  */
 231 static void target_core_deregister_fabric(
 232         struct config_group *group,
 233         struct config_item *item)
 234 {
 235         struct target_fabric_configfs *tf = container_of(
 236                 to_config_group(item), struct target_fabric_configfs, tf_group);
 237         struct config_group *tf_group;
 238         struct config_item *df_item;
 239         int i;
 240
 241         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 242                 " tf list\n", config_item_name(item));
 243
 244         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 245                         " %s\n", tf->tf_ops->name);
 246         atomic_dec(&tf->tf_access_cnt);
 247
 248         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 249                         " %s\n", config_item_name(item));
 250
 251         tf_group = &tf->tf_group;
 252         for (i = 0; tf_group->default_groups[i]; i++) {
 253                 df_item = &tf_group->default_groups[i]->cg_item;
 254                 tf_group->default_groups[i] = NULL;
 255                 config_item_put(df_item);
 256         }
 257         config_item_put(item);
 258 }
 259
 260 static struct configfs_group_operations target_core_fabric_group_ops = {
 261         .make_group     = &target_core_register_fabric,
 262         .drop_item      = &target_core_deregister_fabric,
 263 };
 264
 265 /*
 266  * All item attributes appearing in /sys/kernel/target/ appear here.
 267  */
 268 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 269         &target_core_item_attr_version,
 270         NULL,
 271 };
 272
 273 /*
 274  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 275  */
 276 static struct config_item_type target_core_fabrics_item = {
 277         .ct_item_ops    = &target_core_fabric_item_ops,
 278         .ct_group_ops   = &target_core_fabric_group_ops,
 279         .ct_attrs       = target_core_fabric_item_attrs,
 280         .ct_owner       = THIS_MODULE,
 281 };
 282
 283 static struct configfs_subsystem target_core_fabrics = {
 284         .su_group = {
 285                 .cg_item = {
 286                         .ci_namebuf = "target",
 287                         .ci_type = &target_core_fabrics_item,
 288                 },
 289         },
 290 };
 291
 292 int target_depend_item(struct config_item *item)
 293 {
 294         return configfs_depend_item(&target_core_fabrics, item);
 295 }
 296 EXPORT_SYMBOL(target_depend_item);
 297
 298 void target_undepend_item(struct config_item *item)
 299 {
 300         return configfs_undepend_item(&target_core_fabrics, item);
 301 }
 302 EXPORT_SYMBOL(target_undepend_item);
 303
 304 /*##############################################################################
 305 // Start functions called by external Target Fabrics Modules
 306 //############################################################################*/
 307
 308 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 309 {
 310         if (!tfo->name) {
 311                 pr_err("Missing tfo->name\n");
 312                 return -EINVAL;
 313         }
 314         if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
 315                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 316                         "_NAME_SIZE\n", tfo->name);
 317                 return -EINVAL;
 318         }
 319         if (!tfo->get_fabric_name) {
 320                 pr_err("Missing tfo->get_fabric_name()\n");
 321                 return -EINVAL;
 322         }
 323         if (!tfo->tpg_get_wwn) {
 324                 pr_err("Missing tfo->tpg_get_wwn()\n");
 325                 return -EINVAL;
 326         }
 327         if (!tfo->tpg_get_tag) {
 328                 pr_err("Missing tfo->tpg_get_tag()\n");
 329                 return -EINVAL;
 330         }
 331         if (!tfo->tpg_check_demo_mode) {
 332                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 333                 return -EINVAL;
 334         }
 335         if (!tfo->tpg_check_demo_mode_cache) {
 336                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 337                 return -EINVAL;
 338         }
 339         if (!tfo->tpg_check_demo_mode_write_protect) {
 340                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 341                 return -EINVAL;
 342         }
 343         if (!tfo->tpg_check_prod_mode_write_protect) {
 344                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 345                 return -EINVAL;
 346         }
 347         if (!tfo->tpg_get_inst_index) {
 348                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 349                 return -EINVAL;
 350         }
 351         if (!tfo->release_cmd) {
 352                 pr_err("Missing tfo->release_cmd()\n");
 353                 return -EINVAL;
 354         }
 355         if (!tfo->shutdown_session) {
 356                 pr_err("Missing tfo->shutdown_session()\n");
 357                 return -EINVAL;
 358         }
 359         if (!tfo->close_session) {
 360                 pr_err("Missing tfo->close_session()\n");
 361                 return -EINVAL;
 362         }
 363         if (!tfo->sess_get_index) {
 364                 pr_err("Missing tfo->sess_get_index()\n");
 365                 return -EINVAL;
 366         }
 367         if (!tfo->write_pending) {
 368                 pr_err("Missing tfo->write_pending()\n");
 369                 return -EINVAL;
 370         }
 371         if (!tfo->write_pending_status) {
 372                 pr_err("Missing tfo->write_pending_status()\n");
 373                 return -EINVAL;
 374         }
 375         if (!tfo->set_default_node_attributes) {
 376                 pr_err("Missing tfo->set_default_node_attributes()\n");
 377                 return -EINVAL;
 378         }
 379         if (!tfo->get_cmd_state) {
 380                 pr_err("Missing tfo->get_cmd_state()\n");
 381                 return -EINVAL;
 382         }
 383         if (!tfo->queue_data_in) {
 384                 pr_err("Missing tfo->queue_data_in()\n");
 385                 return -EINVAL;
 386         }
 387         if (!tfo->queue_status) {
 388                 pr_err("Missing tfo->queue_status()\n");
 389                 return -EINVAL;
 390         }
 391         if (!tfo->queue_tm_rsp) {
 392                 pr_err("Missing tfo->queue_tm_rsp()\n");
 393                 return -EINVAL;
 394         }
 395         if (!tfo->aborted_task) {
 396                 pr_err("Missing tfo->aborted_task()\n");
 397                 return -EINVAL;
 398         }
 399         /*
 400          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 401          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 402          * target_core_fabric_configfs.c WWN+TPG group context code.
 403          */
 404         if (!tfo->fabric_make_wwn) {
 405                 pr_err("Missing tfo->fabric_make_wwn()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->fabric_drop_wwn) {
 409                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->fabric_make_tpg) {
 413                 pr_err("Missing tfo->fabric_make_tpg()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->fabric_drop_tpg) {
 417                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 418                 return -EINVAL;
 419         }
 420
 421         return 0;
 422 }
 423
 424 int target_register_template(const struct target_core_fabric_ops *fo)
 425 {
 426         struct target_fabric_configfs *tf;
 427         int ret;
 428
 429         ret = target_fabric_tf_ops_check(fo);
 430         if (ret)
 431                 return ret;
 432
 433         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 434         if (!tf) {
 435                 pr_err("%s: could not allocate memory!\n", __func__);
 436                 return -ENOMEM;
 437         }
 438
 439         INIT_LIST_HEAD(&tf->tf_list);
 440         atomic_set(&tf->tf_access_cnt, 0);
 441         tf->tf_ops = fo;
 442         target_fabric_setup_cits(tf);
 443
 444         mutex_lock(&g_tf_lock);
 445         list_add_tail(&tf->tf_list, &g_tf_list);
 446         mutex_unlock(&g_tf_lock);
 447
 448         return 0;
 449 }
 450 EXPORT_SYMBOL(target_register_template);
 451
 452 void target_unregister_template(const struct target_core_fabric_ops *fo)
 453 {
 454         struct target_fabric_configfs *t;
 455
 456         mutex_lock(&g_tf_lock);
 457         list_for_each_entry(t, &g_tf_list, tf_list) {
 458                 if (!strcmp(t->tf_ops->name, fo->name)) {
 459                         BUG_ON(atomic_read(&t->tf_access_cnt));
 460                         list_del(&t->tf_list);
 461                         kfree(t);
 462                         break;
 463                 }
 464         }
 465         mutex_unlock(&g_tf_lock);
 466 }
 467 EXPORT_SYMBOL(target_unregister_template);
 468
 469 /*##############################################################################
 470 // Stop functions called by external Target Fabrics Modules
 471 //############################################################################*/
 472
 473 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 474 #define DEF_TB_DEV_ATTRIB_SHOW(_backend, _name)                         \
 475 static ssize_t _backend##_dev_show_attr_##_name(                        \
 476         struct se_dev_attrib *da,                                       \
 477         char *page)                                                     \
 478 {                                                                       \
 479         return snprintf(page, PAGE_SIZE, "%u\n",                        \
 480                         (u32)da->da_dev->dev_attrib._name);             \
 481 }
 482
 483 #define DEF_TB_DEV_ATTRIB_STORE(_backend, _name)                        \
 484 static ssize_t _backend##_dev_store_attr_##_name(                       \
 485         struct se_dev_attrib *da,                                       \
 486         const char *page,                                               \
 487         size_t count)                                                   \
 488 {                                                                       \
 489         unsigned long val;                                              \
 490         int ret;                                                        \
 491                                                                         \
 492         ret = kstrtoul(page, 0, &val);                                  \
 493         if (ret < 0) {                                                  \
 494                 pr_err("kstrtoul() failed with ret: %d\n", ret);        \
 495                 return -EINVAL;                                         \
 496         }                                                               \
 497         ret = se_dev_set_##_name(da->da_dev, (u32)val);                 \
 498                                                                         \
 499         return (!ret) ? count : -EINVAL;                                \
 500 }
 501
 502 #define DEF_TB_DEV_ATTRIB(_backend, _name)                              \
 503 DEF_TB_DEV_ATTRIB_SHOW(_backend, _name);                                \
 504 DEF_TB_DEV_ATTRIB_STORE(_backend, _name);
 505
 506 #define DEF_TB_DEV_ATTRIB_RO(_backend, name)                            \
 507 DEF_TB_DEV_ATTRIB_SHOW(_backend, name);
 508
 509 CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib);
 510 #define TB_DEV_ATTR(_backend, _name, _mode)                             \
 511 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
 512                 __CONFIGFS_EATTR(_name, _mode,                          \
 513                 _backend##_dev_show_attr_##_name,                       \
 514                 _backend##_dev_store_attr_##_name);
 515
 516 #define TB_DEV_ATTR_RO(_backend, _name)                                         \
 517 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
 518         __CONFIGFS_EATTR_RO(_name,                                      \
 519         _backend##_dev_show_attr_##_name);
 520
 521 DEF_TB_DEV_ATTRIB(target_core, emulate_model_alias);
 522 DEF_TB_DEV_ATTRIB(target_core, emulate_dpo);
 523 DEF_TB_DEV_ATTRIB(target_core, emulate_fua_write);
 524 DEF_TB_DEV_ATTRIB(target_core, emulate_fua_read);
 525 DEF_TB_DEV_ATTRIB(target_core, emulate_write_cache);
 526 DEF_TB_DEV_ATTRIB(target_core, emulate_ua_intlck_ctrl);
 527 DEF_TB_DEV_ATTRIB(target_core, emulate_tas);
 528 DEF_TB_DEV_ATTRIB(target_core, emulate_tpu);
 529 DEF_TB_DEV_ATTRIB(target_core, emulate_tpws);
 530 DEF_TB_DEV_ATTRIB(target_core, emulate_caw);
 531 DEF_TB_DEV_ATTRIB(target_core, emulate_3pc);
 532 DEF_TB_DEV_ATTRIB(target_core, pi_prot_type);
 533 DEF_TB_DEV_ATTRIB_RO(target_core, hw_pi_prot_type);
 534 DEF_TB_DEV_ATTRIB(target_core, pi_prot_format);
 535 DEF_TB_DEV_ATTRIB(target_core, enforce_pr_isids);
 536 DEF_TB_DEV_ATTRIB(target_core, is_nonrot);
 537 DEF_TB_DEV_ATTRIB(target_core, emulate_rest_reord);
 538 DEF_TB_DEV_ATTRIB(target_core, force_pr_aptpl);
 539 DEF_TB_DEV_ATTRIB_RO(target_core, hw_block_size);
 540 DEF_TB_DEV_ATTRIB(target_core, block_size);
 541 DEF_TB_DEV_ATTRIB_RO(target_core, hw_max_sectors);
 542 DEF_TB_DEV_ATTRIB(target_core, optimal_sectors);
 543 DEF_TB_DEV_ATTRIB_RO(target_core, hw_queue_depth);
 544 DEF_TB_DEV_ATTRIB(target_core, queue_depth);
 545 DEF_TB_DEV_ATTRIB(target_core, max_unmap_lba_count);
 546 DEF_TB_DEV_ATTRIB(target_core, max_unmap_block_desc_count);
 547 DEF_TB_DEV_ATTRIB(target_core, unmap_granularity);
 548 DEF_TB_DEV_ATTRIB(target_core, unmap_granularity_alignment);
 549 DEF_TB_DEV_ATTRIB(target_core, max_write_same_len);
 550
 551 TB_DEV_ATTR(target_core, emulate_model_alias, S_IRUGO | S_IWUSR);
 552 TB_DEV_ATTR(target_core, emulate_dpo, S_IRUGO | S_IWUSR);
 553 TB_DEV_ATTR(target_core, emulate_fua_write, S_IRUGO | S_IWUSR);
 554 TB_DEV_ATTR(target_core, emulate_fua_read, S_IRUGO | S_IWUSR);
 555 TB_DEV_ATTR(target_core, emulate_write_cache, S_IRUGO | S_IWUSR);
 556 TB_DEV_ATTR(target_core, emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 557 TB_DEV_ATTR(target_core, emulate_tas, S_IRUGO | S_IWUSR);
 558 TB_DEV_ATTR(target_core, emulate_tpu, S_IRUGO | S_IWUSR);
 559 TB_DEV_ATTR(target_core, emulate_tpws, S_IRUGO | S_IWUSR);
 560 TB_DEV_ATTR(target_core, emulate_caw, S_IRUGO | S_IWUSR);
 561 TB_DEV_ATTR(target_core, emulate_3pc, S_IRUGO | S_IWUSR);
 562 TB_DEV_ATTR(target_core, pi_prot_type, S_IRUGO | S_IWUSR);
 563 TB_DEV_ATTR_RO(target_core, hw_pi_prot_type);
 564 TB_DEV_ATTR(target_core, pi_prot_format, S_IRUGO | S_IWUSR);
 565 TB_DEV_ATTR(target_core, enforce_pr_isids, S_IRUGO | S_IWUSR);
 566 TB_DEV_ATTR(target_core, is_nonrot, S_IRUGO | S_IWUSR);
 567 TB_DEV_ATTR(target_core, emulate_rest_reord, S_IRUGO | S_IWUSR);
 568 TB_DEV_ATTR(target_core, force_pr_aptpl, S_IRUGO | S_IWUSR)
 569 TB_DEV_ATTR_RO(target_core, hw_block_size);
 570 TB_DEV_ATTR(target_core, block_size, S_IRUGO | S_IWUSR)
 571 TB_DEV_ATTR_RO(target_core, hw_max_sectors);
 572 TB_DEV_ATTR(target_core, optimal_sectors, S_IRUGO | S_IWUSR);
 573 TB_DEV_ATTR_RO(target_core, hw_queue_depth);
 574 TB_DEV_ATTR(target_core, queue_depth, S_IRUGO | S_IWUSR);
 575 TB_DEV_ATTR(target_core, max_unmap_lba_count, S_IRUGO | S_IWUSR);
 576 TB_DEV_ATTR(target_core, max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 577 TB_DEV_ATTR(target_core, unmap_granularity, S_IRUGO | S_IWUSR);
 578 TB_DEV_ATTR(target_core, unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 579 TB_DEV_ATTR(target_core, max_write_same_len, S_IRUGO | S_IWUSR);
 580
 581 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 582 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 583
 584 /*
 585  * dev_attrib attributes for devices using the target core SBC/SPC
 586  * interpreter.  Any backend using spc_parse_cdb should be using
 587  * these.
 588  */
 589 struct configfs_attribute *sbc_attrib_attrs[] = {
 590         &target_core_dev_attrib_emulate_model_alias.attr,
 591         &target_core_dev_attrib_emulate_dpo.attr,
 592         &target_core_dev_attrib_emulate_fua_write.attr,
 593         &target_core_dev_attrib_emulate_fua_read.attr,
 594         &target_core_dev_attrib_emulate_write_cache.attr,
 595         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 596         &target_core_dev_attrib_emulate_tas.attr,
 597         &target_core_dev_attrib_emulate_tpu.attr,
 598         &target_core_dev_attrib_emulate_tpws.attr,
 599         &target_core_dev_attrib_emulate_caw.attr,
 600         &target_core_dev_attrib_emulate_3pc.attr,
 601         &target_core_dev_attrib_pi_prot_type.attr,
 602         &target_core_dev_attrib_hw_pi_prot_type.attr,
 603         &target_core_dev_attrib_pi_prot_format.attr,
 604         &target_core_dev_attrib_enforce_pr_isids.attr,
 605         &target_core_dev_attrib_is_nonrot.attr,
 606         &target_core_dev_attrib_emulate_rest_reord.attr,
 607         &target_core_dev_attrib_force_pr_aptpl.attr,
 608         &target_core_dev_attrib_hw_block_size.attr,
 609         &target_core_dev_attrib_block_size.attr,
 610         &target_core_dev_attrib_hw_max_sectors.attr,
 611         &target_core_dev_attrib_optimal_sectors.attr,
 612         &target_core_dev_attrib_hw_queue_depth.attr,
 613         &target_core_dev_attrib_queue_depth.attr,
 614         &target_core_dev_attrib_max_unmap_lba_count.attr,
 615         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 616         &target_core_dev_attrib_unmap_granularity.attr,
 617         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 618         &target_core_dev_attrib_max_write_same_len.attr,
 619         NULL,
 620 };
 621 EXPORT_SYMBOL(sbc_attrib_attrs);
 622
 623 DEF_TB_DEV_ATTRIB_RO(target_pt, hw_pi_prot_type);
 624 DEF_TB_DEV_ATTRIB_RO(target_pt, hw_block_size);
 625 DEF_TB_DEV_ATTRIB_RO(target_pt, hw_max_sectors);
 626 DEF_TB_DEV_ATTRIB_RO(target_pt, hw_queue_depth);
 627
 628 TB_DEV_ATTR_RO(target_pt, hw_pi_prot_type);
 629 TB_DEV_ATTR_RO(target_pt, hw_block_size);
 630 TB_DEV_ATTR_RO(target_pt, hw_max_sectors);
 631 TB_DEV_ATTR_RO(target_pt, hw_queue_depth);
 632
 633 /*
 634  * Minimal dev_attrib attributes for devices passing through CDBs.
 635  * In this case we only provide a few read-only attributes for
 636  * backwards compatibility.
 637  */
 638 struct configfs_attribute *passthrough_attrib_attrs[] = {
 639         &target_pt_dev_attrib_hw_pi_prot_type.attr,
 640         &target_pt_dev_attrib_hw_block_size.attr,
 641         &target_pt_dev_attrib_hw_max_sectors.attr,
 642         &target_pt_dev_attrib_hw_queue_depth.attr,
 643         NULL,
 644 };
 645 EXPORT_SYMBOL(passthrough_attrib_attrs);
 646
 647 static struct configfs_item_operations target_core_dev_attrib_ops = {
 648         .show_attribute         = target_core_dev_attrib_attr_show,
 649         .store_attribute        = target_core_dev_attrib_attr_store,
 650 };
 651
 652 TB_CIT_SETUP_DRV(dev_attrib, &target_core_dev_attrib_ops, NULL);
 653
 654 /* End functions for struct config_item_type tb_dev_attrib_cit */
 655
 656 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
 657
 658 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 659 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 660 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 661                 __CONFIGFS_EATTR(_name, _mode,                          \
 662                 target_core_dev_wwn_show_attr_##_name,                  \
 663                 target_core_dev_wwn_store_attr_##_name);
 664
 665 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 666 do {                                                                    \
 667         static struct target_core_dev_wwn_attribute                     \
 668                         target_core_dev_wwn_##_name =                   \
 669                 __CONFIGFS_EATTR_RO(_name,                              \
 670                 target_core_dev_wwn_show_attr_##_name);                 \
 671 } while (0);
 672
 673 /*
 674  * VPD page 0x80 Unit serial
 675  */
 676 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 677         struct t10_wwn *t10_wwn,
 678         char *page)
 679 {
 680         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 681                 &t10_wwn->unit_serial[0]);
 682 }
 683
 684 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 685         struct t10_wwn *t10_wwn,
 686         const char *page,
 687         size_t count)
 688 {
 689         struct se_device *dev = t10_wwn->t10_dev;
 690         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 691
 692         /*
 693          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 694          * from the struct scsi_device level firmware, do not allow
 695          * VPD Unit Serial to be emulated.
 696          *
 697          * Note this struct scsi_device could also be emulating VPD
 698          * information from its drivers/scsi LLD.  But for now we assume
 699          * it is doing 'the right thing' wrt a world wide unique
 700          * VPD Unit Serial Number that OS dependent multipath can depend on.
 701          */
 702         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 703                 pr_err("Underlying SCSI device firmware provided VPD"
 704                         " Unit Serial, ignoring request\n");
 705                 return -EOPNOTSUPP;
 706         }
 707
 708         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 709                 pr_err("Emulated VPD Unit Serial exceeds"
 710                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 711                 return -EOVERFLOW;
 712         }
 713         /*
 714          * Check to see if any active $FABRIC_MOD exports exist.  If they
 715          * do exist, fail here as changing this information on the fly
 716          * (underneath the initiator side OS dependent multipath code)
 717          * could cause negative effects.
 718          */
 719         if (dev->export_count) {
 720                 pr_err("Unable to set VPD Unit Serial while"
 721                         " active %d $FABRIC_MOD exports exist\n",
 722                         dev->export_count);
 723                 return -EINVAL;
 724         }
 725
 726         /*
 727          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 728          *
 729          * Also, strip any newline added from the userspace
 730          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 731          */
 732         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 733         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 734         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 735                         "%s", strstrip(buf));
 736         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 737
 738         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 739                         " %s\n", dev->t10_wwn.unit_serial);
 740
 741         return count;
 742 }
 743
 744 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 745
 746 /*
 747  * VPD page 0x83 Protocol Identifier
 748  */
 749 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 750         struct t10_wwn *t10_wwn,
 751         char *page)
 752 {
 753         struct t10_vpd *vpd;
 754         unsigned char buf[VPD_TMP_BUF_SIZE];
 755         ssize_t len = 0;
 756
 757         memset(buf, 0, VPD_TMP_BUF_SIZE);
 758
 759         spin_lock(&t10_wwn->t10_vpd_lock);
 760         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 761                 if (!vpd->protocol_identifier_set)
 762                         continue;
 763
 764                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 765
 766                 if (len + strlen(buf) >= PAGE_SIZE)
 767                         break;
 768
 769                 len += sprintf(page+len, "%s", buf);
 770         }
 771         spin_unlock(&t10_wwn->t10_vpd_lock);
 772
 773         return len;
 774 }
 775
 776 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 777         struct t10_wwn *t10_wwn,
 778         const char *page,
 779         size_t count)
 780 {
 781         return -ENOSYS;
 782 }
 783
 784 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 785
 786 /*
 787  * Generic wrapper for dumping VPD identifiers by association.
 788  */
 789 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 790 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 791         struct t10_wwn *t10_wwn,                                        \
 792         char *page)                                                     \
 793 {                                                                       \
 794         struct t10_vpd *vpd;                                                    \
 795         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 796         ssize_t len = 0;                                                \
 797                                                                         \
 798         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 799         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 800                 if (vpd->association != _assoc)                         \
 801                         continue;                                       \
 802                                                                         \
 803                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 804                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 805                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 806                         break;                                          \
 807                 len += sprintf(page+len, "%s", buf);                    \
 808                                                                         \
 809                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 810                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 811                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 812                         break;                                          \
 813                 len += sprintf(page+len, "%s", buf);                    \
 814                                                                         \
 815                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 816                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 817                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 818                         break;                                          \
 819                 len += sprintf(page+len, "%s", buf);                    \
 820         }                                                               \
 821         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 822                                                                         \
 823         return len;                                                     \
 824 }
 825
 826 /*
 827  * VPD page 0x83 Association: Logical Unit
 828  */
 829 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 830
 831 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 832         struct t10_wwn *t10_wwn,
 833         const char *page,
 834         size_t count)
 835 {
 836         return -ENOSYS;
 837 }
 838
 839 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 840
 841 /*
 842  * VPD page 0x83 Association: Target Port
 843  */
 844 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 845
 846 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 847         struct t10_wwn *t10_wwn,
 848         const char *page,
 849         size_t count)
 850 {
 851         return -ENOSYS;
 852 }
 853
 854 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 855
 856 /*
 857  * VPD page 0x83 Association: SCSI Target Device
 858  */
 859 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 860
 861 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 862         struct t10_wwn *t10_wwn,
 863         const char *page,
 864         size_t count)
 865 {
 866         return -ENOSYS;
 867 }
 868
 869 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 870
 871 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 872
 873 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 874         &target_core_dev_wwn_vpd_unit_serial.attr,
 875         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 876         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 877         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 878         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 879         NULL,
 880 };
 881
 882 static struct configfs_item_operations target_core_dev_wwn_ops = {
 883         .show_attribute         = target_core_dev_wwn_attr_show,
 884         .store_attribute        = target_core_dev_wwn_attr_store,
 885 };
 886
 887 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
 888
 889 /*  End functions for struct config_item_type tb_dev_wwn_cit */
 890
 891 /*  Start functions for struct config_item_type tb_dev_pr_cit */
 892
 893 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 894 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 895 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 896         __CONFIGFS_EATTR(_name, _mode,                                  \
 897         target_core_dev_pr_show_attr_##_name,                           \
 898         target_core_dev_pr_store_attr_##_name);
 899
 900 #define SE_DEV_PR_ATTR_RO(_name);                                       \
 901 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 902         __CONFIGFS_EATTR_RO(_name,                                      \
 903         target_core_dev_pr_show_attr_##_name);
 904
 905 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
 906                 char *page)
 907 {
 908         struct se_node_acl *se_nacl;
 909         struct t10_pr_registration *pr_reg;
 910         char i_buf[PR_REG_ISID_ID_LEN];
 911
 912         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 913
 914         pr_reg = dev->dev_pr_res_holder;
 915         if (!pr_reg)
 916                 return sprintf(page, "No SPC-3 Reservation holder\n");
 917
 918         se_nacl = pr_reg->pr_reg_nacl;
 919         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
 920
 921         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
 922                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 923                 se_nacl->initiatorname, i_buf);
 924 }
 925
 926 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
 927                 char *page)
 928 {
 929         struct se_node_acl *se_nacl;
 930         ssize_t len;
 931
 932         se_nacl = dev->dev_reserved_node_acl;
 933         if (se_nacl) {
 934                 len = sprintf(page,
 935                               "SPC-2 Reservation: %s Initiator: %s\n",
 936                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 937                               se_nacl->initiatorname);
 938         } else {
 939                 len = sprintf(page, "No SPC-2 Reservation holder\n");
 940         }
 941         return len;
 942 }
 943
 944 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
 945                 char *page)
 946 {
 947         int ret;
 948
 949         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 950                 return sprintf(page, "Passthrough\n");
 951
 952         spin_lock(&dev->dev_reservation_lock);
 953         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 954                 ret = target_core_dev_pr_show_spc2_res(dev, page);
 955         else
 956                 ret = target_core_dev_pr_show_spc3_res(dev, page);
 957         spin_unlock(&dev->dev_reservation_lock);
 958         return ret;
 959 }
 960
 961 SE_DEV_PR_ATTR_RO(res_holder);
 962
 963 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
 964                 struct se_device *dev, char *page)
 965 {
 966         ssize_t len = 0;
 967
 968         spin_lock(&dev->dev_reservation_lock);
 969         if (!dev->dev_pr_res_holder) {
 970                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 971         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
 972                 len = sprintf(page, "SPC-3 Reservation: All Target"
 973                         " Ports registration\n");
 974         } else {
 975                 len = sprintf(page, "SPC-3 Reservation: Single"
 976                         " Target Port registration\n");
 977         }
 978
 979         spin_unlock(&dev->dev_reservation_lock);
 980         return len;
 981 }
 982
 983 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
 984
 985 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
 986                 struct se_device *dev, char *page)
 987 {
 988         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
 989 }
 990
 991 SE_DEV_PR_ATTR_RO(res_pr_generation);
 992
 993 /*
 994  * res_pr_holder_tg_port
 995  */
 996 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
 997                 struct se_device *dev, char *page)
 998 {
 999         struct se_node_acl *se_nacl;
1000         struct se_portal_group *se_tpg;
1001         struct t10_pr_registration *pr_reg;
1002         const struct target_core_fabric_ops *tfo;
1003         ssize_t len = 0;
1004
1005         spin_lock(&dev->dev_reservation_lock);
1006         pr_reg = dev->dev_pr_res_holder;
1007         if (!pr_reg) {
1008                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1009                 goto out_unlock;
1010         }
1011
1012         se_nacl = pr_reg->pr_reg_nacl;
1013         se_tpg = se_nacl->se_tpg;
1014         tfo = se_tpg->se_tpg_tfo;
1015
1016         len += sprintf(page+len, "SPC-3 Reservation: %s"
1017                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1018                 tfo->tpg_get_wwn(se_tpg));
1019         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1020                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1021                 " %s Logical Unit: %u\n", pr_reg->tg_pt_sep_rtpi,
1022                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1023                 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1024
1025 out_unlock:
1026         spin_unlock(&dev->dev_reservation_lock);
1027         return len;
1028 }
1029
1030 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1031
1032 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1033                 struct se_device *dev, char *page)
1034 {
1035         const struct target_core_fabric_ops *tfo;
1036         struct t10_pr_registration *pr_reg;
1037         unsigned char buf[384];
1038         char i_buf[PR_REG_ISID_ID_LEN];
1039         ssize_t len = 0;
1040         int reg_count = 0;
1041
1042         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1043
1044         spin_lock(&dev->t10_pr.registration_lock);
1045         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1046                         pr_reg_list) {
1047
1048                 memset(buf, 0, 384);
1049                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1050                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1051                 core_pr_dump_initiator_port(pr_reg, i_buf,
1052                                         PR_REG_ISID_ID_LEN);
1053                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1054                         tfo->get_fabric_name(),
1055                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1056                         pr_reg->pr_res_generation);
1057
1058                 if (len + strlen(buf) >= PAGE_SIZE)
1059                         break;
1060
1061                 len += sprintf(page+len, "%s", buf);
1062                 reg_count++;
1063         }
1064         spin_unlock(&dev->t10_pr.registration_lock);
1065
1066         if (!reg_count)
1067                 len += sprintf(page+len, "None\n");
1068
1069         return len;
1070 }
1071
1072 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1073
1074 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1075                 struct se_device *dev, char *page)
1076 {
1077         struct t10_pr_registration *pr_reg;
1078         ssize_t len = 0;
1079
1080         spin_lock(&dev->dev_reservation_lock);
1081         pr_reg = dev->dev_pr_res_holder;
1082         if (pr_reg) {
1083                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1084                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1085         } else {
1086                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1087         }
1088
1089         spin_unlock(&dev->dev_reservation_lock);
1090         return len;
1091 }
1092
1093 SE_DEV_PR_ATTR_RO(res_pr_type);
1094
1095 static ssize_t target_core_dev_pr_show_attr_res_type(
1096                 struct se_device *dev, char *page)
1097 {
1098         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1099                 return sprintf(page, "SPC_PASSTHROUGH\n");
1100         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1101                 return sprintf(page, "SPC2_RESERVATIONS\n");
1102         else
1103                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1104 }
1105
1106 SE_DEV_PR_ATTR_RO(res_type);
1107
1108 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1109                 struct se_device *dev, char *page)
1110 {
1111         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1112                 return 0;
1113
1114         return sprintf(page, "APTPL Bit Status: %s\n",
1115                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1116 }
1117
1118 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1119
1120 /*
1121  * res_aptpl_metadata
1122  */
1123 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1124                 struct se_device *dev, char *page)
1125 {
1126         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1127                 return 0;
1128
1129         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1130 }
1131
1132 enum {
1133         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1134         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1135         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1136         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1137 };
1138
1139 static match_table_t tokens = {
1140         {Opt_initiator_fabric, "initiator_fabric=%s"},
1141         {Opt_initiator_node, "initiator_node=%s"},
1142         {Opt_initiator_sid, "initiator_sid=%s"},
1143         {Opt_sa_res_key, "sa_res_key=%s"},
1144         {Opt_res_holder, "res_holder=%d"},
1145         {Opt_res_type, "res_type=%d"},
1146         {Opt_res_scope, "res_scope=%d"},
1147         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1148         {Opt_mapped_lun, "mapped_lun=%d"},
1149         {Opt_target_fabric, "target_fabric=%s"},
1150         {Opt_target_node, "target_node=%s"},
1151         {Opt_tpgt, "tpgt=%d"},
1152         {Opt_port_rtpi, "port_rtpi=%d"},
1153         {Opt_target_lun, "target_lun=%d"},
1154         {Opt_err, NULL}
1155 };
1156
1157 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1158         struct se_device *dev,
1159         const char *page,
1160         size_t count)
1161 {
1162         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1163         unsigned char *t_fabric = NULL, *t_port = NULL;
1164         char *orig, *ptr, *opts;
1165         substring_t args[MAX_OPT_ARGS];
1166         unsigned long long tmp_ll;
1167         u64 sa_res_key = 0;
1168         u32 mapped_lun = 0, target_lun = 0;
1169         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1170         u16 tpgt = 0;
1171         u8 type = 0;
1172
1173         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1174                 return 0;
1175         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1176                 return 0;
1177
1178         if (dev->export_count) {
1179                 pr_debug("Unable to process APTPL metadata while"
1180                         " active fabric exports exist\n");
1181                 return -EINVAL;
1182         }
1183
1184         opts = kstrdup(page, GFP_KERNEL);
1185         if (!opts)
1186                 return -ENOMEM;
1187
1188         orig = opts;
1189         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1190                 if (!*ptr)
1191                         continue;
1192
1193                 token = match_token(ptr, tokens, args);
1194                 switch (token) {
1195                 case Opt_initiator_fabric:
1196                         i_fabric = match_strdup(args);
1197                         if (!i_fabric) {
1198                                 ret = -ENOMEM;
1199                                 goto out;
1200                         }
1201                         break;
1202                 case Opt_initiator_node:
1203                         i_port = match_strdup(args);
1204                         if (!i_port) {
1205                                 ret = -ENOMEM;
1206                                 goto out;
1207                         }
1208                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1209                                 pr_err("APTPL metadata initiator_node="
1210                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1211                                         PR_APTPL_MAX_IPORT_LEN);
1212                                 ret = -EINVAL;
1213                                 break;
1214                         }
1215                         break;
1216                 case Opt_initiator_sid:
1217                         isid = match_strdup(args);
1218                         if (!isid) {
1219                                 ret = -ENOMEM;
1220                                 goto out;
1221                         }
1222                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1223                                 pr_err("APTPL metadata initiator_isid"
1224                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1225                                         PR_REG_ISID_LEN);
1226                                 ret = -EINVAL;
1227                                 break;
1228                         }
1229                         break;
1230                 case Opt_sa_res_key:
1231                         ret = kstrtoull(args->from, 0, &tmp_ll);
1232                         if (ret < 0) {
1233                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1234                                 goto out;
1235                         }
1236                         sa_res_key = (u64)tmp_ll;
1237                         break;
1238                 /*
1239                  * PR APTPL Metadata for Reservation
1240                  */
1241                 case Opt_res_holder:
1242                         match_int(args, &arg);
1243                         res_holder = arg;
1244                         break;
1245                 case Opt_res_type:
1246                         match_int(args, &arg);
1247                         type = (u8)arg;
1248                         break;
1249                 case Opt_res_scope:
1250                         match_int(args, &arg);
1251                         break;
1252                 case Opt_res_all_tg_pt:
1253                         match_int(args, &arg);
1254                         all_tg_pt = (int)arg;
1255                         break;
1256                 case Opt_mapped_lun:
1257                         match_int(args, &arg);
1258                         mapped_lun = (u32)arg;
1259                         break;
1260                 /*
1261                  * PR APTPL Metadata for Target Port
1262                  */
1263                 case Opt_target_fabric:
1264                         t_fabric = match_strdup(args);
1265                         if (!t_fabric) {
1266                                 ret = -ENOMEM;
1267                                 goto out;
1268                         }
1269                         break;
1270                 case Opt_target_node:
1271                         t_port = match_strdup(args);
1272                         if (!t_port) {
1273                                 ret = -ENOMEM;
1274                                 goto out;
1275                         }
1276                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1277                                 pr_err("APTPL metadata target_node="
1278                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1279                                         PR_APTPL_MAX_TPORT_LEN);
1280                                 ret = -EINVAL;
1281                                 break;
1282                         }
1283                         break;
1284                 case Opt_tpgt:
1285                         match_int(args, &arg);
1286                         tpgt = (u16)arg;
1287                         break;
1288                 case Opt_port_rtpi:
1289                         match_int(args, &arg);
1290                         break;
1291                 case Opt_target_lun:
1292                         match_int(args, &arg);
1293                         target_lun = (u32)arg;
1294                         break;
1295                 default:
1296                         break;
1297                 }
1298         }
1299
1300         if (!i_port || !t_port || !sa_res_key) {
1301                 pr_err("Illegal parameters for APTPL registration\n");
1302                 ret = -EINVAL;
1303                 goto out;
1304         }
1305
1306         if (res_holder && !(type)) {
1307                 pr_err("Illegal PR type: 0x%02x for reservation"
1308                                 " holder\n", type);
1309                 ret = -EINVAL;
1310                 goto out;
1311         }
1312
1313         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1314                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1315                         res_holder, all_tg_pt, type);
1316 out:
1317         kfree(i_fabric);
1318         kfree(i_port);
1319         kfree(isid);
1320         kfree(t_fabric);
1321         kfree(t_port);
1322         kfree(orig);
1323         return (ret == 0) ? count : ret;
1324 }
1325
1326 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1327
1328 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1329
1330 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1331         &target_core_dev_pr_res_holder.attr,
1332         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1333         &target_core_dev_pr_res_pr_generation.attr,
1334         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1335         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1336         &target_core_dev_pr_res_pr_type.attr,
1337         &target_core_dev_pr_res_type.attr,
1338         &target_core_dev_pr_res_aptpl_active.attr,
1339         &target_core_dev_pr_res_aptpl_metadata.attr,
1340         NULL,
1341 };
1342
1343 static struct configfs_item_operations target_core_dev_pr_ops = {
1344         .show_attribute         = target_core_dev_pr_attr_show,
1345         .store_attribute        = target_core_dev_pr_attr_store,
1346 };
1347
1348 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1349
1350 /*  End functions for struct config_item_type tb_dev_pr_cit */
1351
1352 /*  Start functions for struct config_item_type tb_dev_cit */
1353
1354 static ssize_t target_core_show_dev_info(void *p, char *page)
1355 {
1356         struct se_device *dev = p;
1357         int bl = 0;
1358         ssize_t read_bytes = 0;
1359
1360         transport_dump_dev_state(dev, page, &bl);
1361         read_bytes += bl;
1362         read_bytes += dev->transport->show_configfs_dev_params(dev,
1363                         page+read_bytes);
1364         return read_bytes;
1365 }
1366
1367 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1368         .attr   = { .ca_owner = THIS_MODULE,
1369                     .ca_name = "info",
1370                     .ca_mode = S_IRUGO },
1371         .show   = target_core_show_dev_info,
1372         .store  = NULL,
1373 };
1374
1375 static ssize_t target_core_store_dev_control(
1376         void *p,
1377         const char *page,
1378         size_t count)
1379 {
1380         struct se_device *dev = p;
1381
1382         return dev->transport->set_configfs_dev_params(dev, page, count);
1383 }
1384
1385 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1386         .attr   = { .ca_owner = THIS_MODULE,
1387                     .ca_name = "control",
1388                     .ca_mode = S_IWUSR },
1389         .show   = NULL,
1390         .store  = target_core_store_dev_control,
1391 };
1392
1393 static ssize_t target_core_show_dev_alias(void *p, char *page)
1394 {
1395         struct se_device *dev = p;
1396
1397         if (!(dev->dev_flags & DF_USING_ALIAS))
1398                 return 0;
1399
1400         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1401 }
1402
1403 static ssize_t target_core_store_dev_alias(
1404         void *p,
1405         const char *page,
1406         size_t count)
1407 {
1408         struct se_device *dev = p;
1409         struct se_hba *hba = dev->se_hba;
1410         ssize_t read_bytes;
1411
1412         if (count > (SE_DEV_ALIAS_LEN-1)) {
1413                 pr_err("alias count: %d exceeds"
1414                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1415                         SE_DEV_ALIAS_LEN-1);
1416                 return -EINVAL;
1417         }
1418
1419         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1420         if (!read_bytes)
1421                 return -EINVAL;
1422         if (dev->dev_alias[read_bytes - 1] == '\n')
1423                 dev->dev_alias[read_bytes - 1] = '\0';
1424
1425         dev->dev_flags |= DF_USING_ALIAS;
1426
1427         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1428                 config_item_name(&hba->hba_group.cg_item),
1429                 config_item_name(&dev->dev_group.cg_item),
1430                 dev->dev_alias);
1431
1432         return read_bytes;
1433 }
1434
1435 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1436         .attr   = { .ca_owner = THIS_MODULE,
1437                     .ca_name = "alias",
1438                     .ca_mode =  S_IRUGO | S_IWUSR },
1439         .show   = target_core_show_dev_alias,
1440         .store  = target_core_store_dev_alias,
1441 };
1442
1443 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1444 {
1445         struct se_device *dev = p;
1446
1447         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1448                 return 0;
1449
1450         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1451 }
1452
1453 static ssize_t target_core_store_dev_udev_path(
1454         void *p,
1455         const char *page,
1456         size_t count)
1457 {
1458         struct se_device *dev = p;
1459         struct se_hba *hba = dev->se_hba;
1460         ssize_t read_bytes;
1461
1462         if (count > (SE_UDEV_PATH_LEN-1)) {
1463                 pr_err("udev_path count: %d exceeds"
1464                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1465                         SE_UDEV_PATH_LEN-1);
1466                 return -EINVAL;
1467         }
1468
1469         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1470                         "%s", page);
1471         if (!read_bytes)
1472                 return -EINVAL;
1473         if (dev->udev_path[read_bytes - 1] == '\n')
1474                 dev->udev_path[read_bytes - 1] = '\0';
1475
1476         dev->dev_flags |= DF_USING_UDEV_PATH;
1477
1478         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1479                 config_item_name(&hba->hba_group.cg_item),
1480                 config_item_name(&dev->dev_group.cg_item),
1481                 dev->udev_path);
1482
1483         return read_bytes;
1484 }
1485
1486 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1487         .attr   = { .ca_owner = THIS_MODULE,
1488                     .ca_name = "udev_path",
1489                     .ca_mode =  S_IRUGO | S_IWUSR },
1490         .show   = target_core_show_dev_udev_path,
1491         .store  = target_core_store_dev_udev_path,
1492 };
1493
1494 static ssize_t target_core_show_dev_enable(void *p, char *page)
1495 {
1496         struct se_device *dev = p;
1497
1498         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1499 }
1500
1501 static ssize_t target_core_store_dev_enable(
1502         void *p,
1503         const char *page,
1504         size_t count)
1505 {
1506         struct se_device *dev = p;
1507         char *ptr;
1508         int ret;
1509
1510         ptr = strstr(page, "1");
1511         if (!ptr) {
1512                 pr_err("For dev_enable ops, only valid value"
1513                                 " is \"1\"\n");
1514                 return -EINVAL;
1515         }
1516
1517         ret = target_configure_device(dev);
1518         if (ret)
1519                 return ret;
1520         return count;
1521 }
1522
1523 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1524         .attr   = { .ca_owner = THIS_MODULE,
1525                     .ca_name = "enable",
1526                     .ca_mode =  S_IRUGO | S_IWUSR },
1527         .show   = target_core_show_dev_enable,
1528         .store  = target_core_store_dev_enable,
1529 };
1530
1531 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1532 {
1533         struct se_device *dev = p;
1534         struct config_item *lu_ci;
1535         struct t10_alua_lu_gp *lu_gp;
1536         struct t10_alua_lu_gp_member *lu_gp_mem;
1537         ssize_t len = 0;
1538
1539         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1540         if (!lu_gp_mem)
1541                 return 0;
1542
1543         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1544         lu_gp = lu_gp_mem->lu_gp;
1545         if (lu_gp) {
1546                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1547                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1548                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1549         }
1550         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1551
1552         return len;
1553 }
1554
1555 static ssize_t target_core_store_alua_lu_gp(
1556         void *p,
1557         const char *page,
1558         size_t count)
1559 {
1560         struct se_device *dev = p;
1561         struct se_hba *hba = dev->se_hba;
1562         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1563         struct t10_alua_lu_gp_member *lu_gp_mem;
1564         unsigned char buf[LU_GROUP_NAME_BUF];
1565         int move = 0;
1566
1567         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1568         if (!lu_gp_mem)
1569                 return 0;
1570
1571         if (count > LU_GROUP_NAME_BUF) {
1572                 pr_err("ALUA LU Group Alias too large!\n");
1573                 return -EINVAL;
1574         }
1575         memset(buf, 0, LU_GROUP_NAME_BUF);
1576         memcpy(buf, page, count);
1577         /*
1578          * Any ALUA logical unit alias besides "NULL" means we will be
1579          * making a new group association.
1580          */
1581         if (strcmp(strstrip(buf), "NULL")) {
1582                 /*
1583                  * core_alua_get_lu_gp_by_name() will increment reference to
1584                  * struct t10_alua_lu_gp.  This reference is released with
1585                  * core_alua_get_lu_gp_by_name below().
1586                  */
1587                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1588                 if (!lu_gp_new)
1589                         return -ENODEV;
1590         }
1591
1592         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1593         lu_gp = lu_gp_mem->lu_gp;
1594         if (lu_gp) {
1595                 /*
1596                  * Clearing an existing lu_gp association, and replacing
1597                  * with NULL
1598                  */
1599                 if (!lu_gp_new) {
1600                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1601                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1602                                 " %hu\n",
1603                                 config_item_name(&hba->hba_group.cg_item),
1604                                 config_item_name(&dev->dev_group.cg_item),
1605                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1606                                 lu_gp->lu_gp_id);
1607
1608                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1609                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1610
1611                         return count;
1612                 }
1613                 /*
1614                  * Removing existing association of lu_gp_mem with lu_gp
1615                  */
1616                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1617                 move = 1;
1618         }
1619         /*
1620          * Associate lu_gp_mem with lu_gp_new.
1621          */
1622         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1623         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1624
1625         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1626                 " core/alua/lu_gps/%s, ID: %hu\n",
1627                 (move) ? "Moving" : "Adding",
1628                 config_item_name(&hba->hba_group.cg_item),
1629                 config_item_name(&dev->dev_group.cg_item),
1630                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1631                 lu_gp_new->lu_gp_id);
1632
1633         core_alua_put_lu_gp_from_name(lu_gp_new);
1634         return count;
1635 }
1636
1637 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1638         .attr   = { .ca_owner = THIS_MODULE,
1639                     .ca_name = "alua_lu_gp",
1640                     .ca_mode = S_IRUGO | S_IWUSR },
1641         .show   = target_core_show_alua_lu_gp,
1642         .store  = target_core_store_alua_lu_gp,
1643 };
1644
1645 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1646 {
1647         struct se_device *dev = p;
1648         struct t10_alua_lba_map *map;
1649         struct t10_alua_lba_map_member *mem;
1650         char *b = page;
1651         int bl = 0;
1652         char state;
1653
1654         spin_lock(&dev->t10_alua.lba_map_lock);
1655         if (!list_empty(&dev->t10_alua.lba_map_list))
1656             bl += sprintf(b + bl, "%u %u\n",
1657                           dev->t10_alua.lba_map_segment_size,
1658                           dev->t10_alua.lba_map_segment_multiplier);
1659         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1660                 bl += sprintf(b + bl, "%llu %llu",
1661                               map->lba_map_first_lba, map->lba_map_last_lba);
1662                 list_for_each_entry(mem, &map->lba_map_mem_list,
1663                                     lba_map_mem_list) {
1664                         switch (mem->lba_map_mem_alua_state) {
1665                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1666                                 state = 'O';
1667                                 break;
1668                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1669                                 state = 'A';
1670                                 break;
1671                         case ALUA_ACCESS_STATE_STANDBY:
1672                                 state = 'S';
1673                                 break;
1674                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1675                                 state = 'U';
1676                                 break;
1677                         default:
1678                                 state = '.';
1679                                 break;
1680                         }
1681                         bl += sprintf(b + bl, " %d:%c",
1682                                       mem->lba_map_mem_alua_pg_id, state);
1683                 }
1684                 bl += sprintf(b + bl, "\n");
1685         }
1686         spin_unlock(&dev->t10_alua.lba_map_lock);
1687         return bl;
1688 }
1689
1690 static ssize_t target_core_store_dev_lba_map(
1691         void *p,
1692         const char *page,
1693         size_t count)
1694 {
1695         struct se_device *dev = p;
1696         struct t10_alua_lba_map *lba_map = NULL;
1697         struct list_head lba_list;
1698         char *map_entries, *ptr;
1699         char state;
1700         int pg_num = -1, pg;
1701         int ret = 0, num = 0, pg_id, alua_state;
1702         unsigned long start_lba = -1, end_lba = -1;
1703         unsigned long segment_size = -1, segment_mult = -1;
1704
1705         map_entries = kstrdup(page, GFP_KERNEL);
1706         if (!map_entries)
1707                 return -ENOMEM;
1708
1709         INIT_LIST_HEAD(&lba_list);
1710         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1711                 if (!*ptr)
1712                         continue;
1713
1714                 if (num == 0) {
1715                         if (sscanf(ptr, "%lu %lu\n",
1716                                    &segment_size, &segment_mult) != 2) {
1717                                 pr_err("Invalid line %d\n", num);
1718                                 ret = -EINVAL;
1719                                 break;
1720                         }
1721                         num++;
1722                         continue;
1723                 }
1724                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1725                         pr_err("Invalid line %d\n", num);
1726                         ret = -EINVAL;
1727                         break;
1728                 }
1729                 ptr = strchr(ptr, ' ');
1730                 if (!ptr) {
1731                         pr_err("Invalid line %d, missing end lba\n", num);
1732                         ret = -EINVAL;
1733                         break;
1734                 }
1735                 ptr++;
1736                 ptr = strchr(ptr, ' ');
1737                 if (!ptr) {
1738                         pr_err("Invalid line %d, missing state definitions\n",
1739                                num);
1740                         ret = -EINVAL;
1741                         break;
1742                 }
1743                 ptr++;
1744                 lba_map = core_alua_allocate_lba_map(&lba_list,
1745                                                      start_lba, end_lba);
1746                 if (IS_ERR(lba_map)) {
1747                         ret = PTR_ERR(lba_map);
1748                         break;
1749                 }
1750                 pg = 0;
1751                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1752                         switch (state) {
1753                         case 'O':
1754                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1755                                 break;
1756                         case 'A':
1757                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1758                                 break;
1759                         case 'S':
1760                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1761                                 break;
1762                         case 'U':
1763                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1764                                 break;
1765                         default:
1766                                 pr_err("Invalid ALUA state '%c'\n", state);
1767                                 ret = -EINVAL;
1768                                 goto out;
1769                         }
1770
1771                         ret = core_alua_allocate_lba_map_mem(lba_map,
1772                                                              pg_id, alua_state);
1773                         if (ret) {
1774                                 pr_err("Invalid target descriptor %d:%c "
1775                                        "at line %d\n",
1776                                        pg_id, state, num);
1777                                 break;
1778                         }
1779                         pg++;
1780                         ptr = strchr(ptr, ' ');
1781                         if (ptr)
1782                                 ptr++;
1783                         else
1784                                 break;
1785                 }
1786                 if (pg_num == -1)
1787                     pg_num = pg;
1788                 else if (pg != pg_num) {
1789                         pr_err("Only %d from %d port groups definitions "
1790                                "at line %d\n", pg, pg_num, num);
1791                         ret = -EINVAL;
1792                         break;
1793                 }
1794                 num++;
1795         }
1796 out:
1797         if (ret) {
1798                 core_alua_free_lba_map(&lba_list);
1799                 count = ret;
1800         } else
1801                 core_alua_set_lba_map(dev, &lba_list,
1802                                       segment_size, segment_mult);
1803         kfree(map_entries);
1804         return count;
1805 }
1806
1807 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1808         .attr   = { .ca_owner = THIS_MODULE,
1809                     .ca_name = "lba_map",
1810                     .ca_mode = S_IRUGO | S_IWUSR },
1811         .show   = target_core_show_dev_lba_map,
1812         .store  = target_core_store_dev_lba_map,
1813 };
1814
1815 static struct configfs_attribute *target_core_dev_attrs[] = {
1816         &target_core_attr_dev_info.attr,
1817         &target_core_attr_dev_control.attr,
1818         &target_core_attr_dev_alias.attr,
1819         &target_core_attr_dev_udev_path.attr,
1820         &target_core_attr_dev_enable.attr,
1821         &target_core_attr_dev_alua_lu_gp.attr,
1822         &target_core_attr_dev_lba_map.attr,
1823         NULL,
1824 };
1825
1826 static void target_core_dev_release(struct config_item *item)
1827 {
1828         struct config_group *dev_cg = to_config_group(item);
1829         struct se_device *dev =
1830                 container_of(dev_cg, struct se_device, dev_group);
1831
1832         kfree(dev_cg->default_groups);
1833         target_free_device(dev);
1834 }
1835
1836 static ssize_t target_core_dev_show(struct config_item *item,
1837                                      struct configfs_attribute *attr,
1838                                      char *page)
1839 {
1840         struct config_group *dev_cg = to_config_group(item);
1841         struct se_device *dev =
1842                 container_of(dev_cg, struct se_device, dev_group);
1843         struct target_core_configfs_attribute *tc_attr = container_of(
1844                         attr, struct target_core_configfs_attribute, attr);
1845
1846         if (!tc_attr->show)
1847                 return -EINVAL;
1848
1849         return tc_attr->show(dev, page);
1850 }
1851
1852 static ssize_t target_core_dev_store(struct config_item *item,
1853                                       struct configfs_attribute *attr,
1854                                       const char *page, size_t count)
1855 {
1856         struct config_group *dev_cg = to_config_group(item);
1857         struct se_device *dev =
1858                 container_of(dev_cg, struct se_device, dev_group);
1859         struct target_core_configfs_attribute *tc_attr = container_of(
1860                         attr, struct target_core_configfs_attribute, attr);
1861
1862         if (!tc_attr->store)
1863                 return -EINVAL;
1864
1865         return tc_attr->store(dev, page, count);
1866 }
1867
1868 static struct configfs_item_operations target_core_dev_item_ops = {
1869         .release                = target_core_dev_release,
1870         .show_attribute         = target_core_dev_show,
1871         .store_attribute        = target_core_dev_store,
1872 };
1873
1874 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
1875
1876 /* End functions for struct config_item_type tb_dev_cit */
1877
1878 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1879
1880 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1881 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1882 static struct target_core_alua_lu_gp_attribute                          \
1883                         target_core_alua_lu_gp_##_name =                \
1884         __CONFIGFS_EATTR(_name, _mode,                                  \
1885         target_core_alua_lu_gp_show_attr_##_name,                       \
1886         target_core_alua_lu_gp_store_attr_##_name);
1887
1888 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
1889 static struct target_core_alua_lu_gp_attribute                          \
1890                         target_core_alua_lu_gp_##_name =                \
1891         __CONFIGFS_EATTR_RO(_name,                                      \
1892         target_core_alua_lu_gp_show_attr_##_name);
1893
1894 /*
1895  * lu_gp_id
1896  */
1897 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1898         struct t10_alua_lu_gp *lu_gp,
1899         char *page)
1900 {
1901         if (!lu_gp->lu_gp_valid_id)
1902                 return 0;
1903
1904         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1905 }
1906
1907 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1908         struct t10_alua_lu_gp *lu_gp,
1909         const char *page,
1910         size_t count)
1911 {
1912         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1913         unsigned long lu_gp_id;
1914         int ret;
1915
1916         ret = kstrtoul(page, 0, &lu_gp_id);
1917         if (ret < 0) {
1918                 pr_err("kstrtoul() returned %d for"
1919                         " lu_gp_id\n", ret);
1920                 return ret;
1921         }
1922         if (lu_gp_id > 0x0000ffff) {
1923                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1924                         " 0x0000ffff\n", lu_gp_id);
1925                 return -EINVAL;
1926         }
1927
1928         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1929         if (ret < 0)
1930                 return -EINVAL;
1931
1932         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1933                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1934                 config_item_name(&alua_lu_gp_cg->cg_item),
1935                 lu_gp->lu_gp_id);
1936
1937         return count;
1938 }
1939
1940 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1941
1942 /*
1943  * members
1944  */
1945 static ssize_t target_core_alua_lu_gp_show_attr_members(
1946         struct t10_alua_lu_gp *lu_gp,
1947         char *page)
1948 {
1949         struct se_device *dev;
1950         struct se_hba *hba;
1951         struct t10_alua_lu_gp_member *lu_gp_mem;
1952         ssize_t len = 0, cur_len;
1953         unsigned char buf[LU_GROUP_NAME_BUF];
1954
1955         memset(buf, 0, LU_GROUP_NAME_BUF);
1956
1957         spin_lock(&lu_gp->lu_gp_lock);
1958         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1959                 dev = lu_gp_mem->lu_gp_mem_dev;
1960                 hba = dev->se_hba;
1961
1962                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1963                         config_item_name(&hba->hba_group.cg_item),
1964                         config_item_name(&dev->dev_group.cg_item));
1965                 cur_len++; /* Extra byte for NULL terminator */
1966
1967                 if ((cur_len + len) > PAGE_SIZE) {
1968                         pr_warn("Ran out of lu_gp_show_attr"
1969                                 "_members buffer\n");
1970                         break;
1971                 }
1972                 memcpy(page+len, buf, cur_len);
1973                 len += cur_len;
1974         }
1975         spin_unlock(&lu_gp->lu_gp_lock);
1976
1977         return len;
1978 }
1979
1980 SE_DEV_ALUA_LU_ATTR_RO(members);
1981
1982 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1983
1984 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1985         &target_core_alua_lu_gp_lu_gp_id.attr,
1986         &target_core_alua_lu_gp_members.attr,
1987         NULL,
1988 };
1989
1990 static void target_core_alua_lu_gp_release(struct config_item *item)
1991 {
1992         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1993                         struct t10_alua_lu_gp, lu_gp_group);
1994
1995         core_alua_free_lu_gp(lu_gp);
1996 }
1997
1998 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1999         .release                = target_core_alua_lu_gp_release,
2000         .show_attribute         = target_core_alua_lu_gp_attr_show,
2001         .store_attribute        = target_core_alua_lu_gp_attr_store,
2002 };
2003
2004 static struct config_item_type target_core_alua_lu_gp_cit = {
2005         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2006         .ct_attrs               = target_core_alua_lu_gp_attrs,
2007         .ct_owner               = THIS_MODULE,
2008 };
2009
2010 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2011
2012 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2013
2014 static struct config_group *target_core_alua_create_lu_gp(
2015         struct config_group *group,
2016         const char *name)
2017 {
2018         struct t10_alua_lu_gp *lu_gp;
2019         struct config_group *alua_lu_gp_cg = NULL;
2020         struct config_item *alua_lu_gp_ci = NULL;
2021
2022         lu_gp = core_alua_allocate_lu_gp(name, 0);
2023         if (IS_ERR(lu_gp))
2024                 return NULL;
2025
2026         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2027         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2028
2029         config_group_init_type_name(alua_lu_gp_cg, name,
2030                         &target_core_alua_lu_gp_cit);
2031
2032         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2033                 " Group: core/alua/lu_gps/%s\n",
2034                 config_item_name(alua_lu_gp_ci));
2035
2036         return alua_lu_gp_cg;
2037
2038 }
2039
2040 static void target_core_alua_drop_lu_gp(
2041         struct config_group *group,
2042         struct config_item *item)
2043 {
2044         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2045                         struct t10_alua_lu_gp, lu_gp_group);
2046
2047         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2048                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2049                 config_item_name(item), lu_gp->lu_gp_id);
2050         /*
2051          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2052          * -> target_core_alua_lu_gp_release()
2053          */
2054         config_item_put(item);
2055 }
2056
2057 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2058         .make_group             = &target_core_alua_create_lu_gp,
2059         .drop_item              = &target_core_alua_drop_lu_gp,
2060 };
2061
2062 static struct config_item_type target_core_alua_lu_gps_cit = {
2063         .ct_item_ops            = NULL,
2064         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2065         .ct_owner               = THIS_MODULE,
2066 };
2067
2068 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2069
2070 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2071
2072 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2073 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2074 static struct target_core_alua_tg_pt_gp_attribute                       \
2075                         target_core_alua_tg_pt_gp_##_name =             \
2076         __CONFIGFS_EATTR(_name, _mode,                                  \
2077         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2078         target_core_alua_tg_pt_gp_store_attr_##_name);
2079
2080 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2081 static struct target_core_alua_tg_pt_gp_attribute                       \
2082                         target_core_alua_tg_pt_gp_##_name =             \
2083         __CONFIGFS_EATTR_RO(_name,                                      \
2084         target_core_alua_tg_pt_gp_show_attr_##_name);
2085
2086 /*
2087  * alua_access_state
2088  */
2089 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2090         struct t10_alua_tg_pt_gp *tg_pt_gp,
2091         char *page)
2092 {
2093         return sprintf(page, "%d\n",
2094                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2095 }
2096
2097 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2098         struct t10_alua_tg_pt_gp *tg_pt_gp,
2099         const char *page,
2100         size_t count)
2101 {
2102         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2103         unsigned long tmp;
2104         int new_state, ret;
2105
2106         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2107                 pr_err("Unable to do implicit ALUA on non valid"
2108                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2109                 return -EINVAL;
2110         }
2111         if (!(dev->dev_flags & DF_CONFIGURED)) {
2112                 pr_err("Unable to set alua_access_state while device is"
2113                        " not configured\n");
2114                 return -ENODEV;
2115         }
2116
2117         ret = kstrtoul(page, 0, &tmp);
2118         if (ret < 0) {
2119                 pr_err("Unable to extract new ALUA access state from"
2120                                 " %s\n", page);
2121                 return ret;
2122         }
2123         new_state = (int)tmp;
2124
2125         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2126                 pr_err("Unable to process implicit configfs ALUA"
2127                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2128                 return -EINVAL;
2129         }
2130         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2131             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2132                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2133                 pr_err("Unable to process implicit configfs ALUA transition"
2134                        " while explicit ALUA management is enabled\n");
2135                 return -EINVAL;
2136         }
2137
2138         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2139                                         NULL, NULL, new_state, 0);
2140         return (!ret) ? count : -EINVAL;
2141 }
2142
2143 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2144
2145 /*
2146  * alua_access_status
2147  */
2148 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2149         struct t10_alua_tg_pt_gp *tg_pt_gp,
2150         char *page)
2151 {
2152         return sprintf(page, "%s\n",
2153                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2154 }
2155
2156 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2157         struct t10_alua_tg_pt_gp *tg_pt_gp,
2158         const char *page,
2159         size_t count)
2160 {
2161         unsigned long tmp;
2162         int new_status, ret;
2163
2164         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2165                 pr_err("Unable to do set ALUA access status on non"
2166                         " valid tg_pt_gp ID: %hu\n",
2167                         tg_pt_gp->tg_pt_gp_valid_id);
2168                 return -EINVAL;
2169         }
2170
2171         ret = kstrtoul(page, 0, &tmp);
2172         if (ret < 0) {
2173                 pr_err("Unable to extract new ALUA access status"
2174                                 " from %s\n", page);
2175                 return ret;
2176         }
2177         new_status = (int)tmp;
2178
2179         if ((new_status != ALUA_STATUS_NONE) &&
2180             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2181             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2182                 pr_err("Illegal ALUA access status: 0x%02x\n",
2183                                 new_status);
2184                 return -EINVAL;
2185         }
2186
2187         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2188         return count;
2189 }
2190
2191 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2192
2193 /*
2194  * alua_access_type
2195  */
2196 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2197         struct t10_alua_tg_pt_gp *tg_pt_gp,
2198         char *page)
2199 {
2200         return core_alua_show_access_type(tg_pt_gp, page);
2201 }
2202
2203 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2204         struct t10_alua_tg_pt_gp *tg_pt_gp,
2205         const char *page,
2206         size_t count)
2207 {
2208         return core_alua_store_access_type(tg_pt_gp, page, count);
2209 }
2210
2211 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2212
2213 /*
2214  * alua_supported_states
2215  */
2216
2217 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2218 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2219         struct t10_alua_tg_pt_gp *t, char *p)                           \
2220 {                                                                       \
2221         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2222 }
2223
2224 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2225 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2226         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2227 {                                                                       \
2228         unsigned long tmp;                                              \
2229         int ret;                                                        \
2230                                                                         \
2231         if (!t->tg_pt_gp_valid_id) {                                    \
2232                 pr_err("Unable to do set ##_name ALUA state on non"     \
2233                        " valid tg_pt_gp ID: %hu\n",                     \
2234                        t->tg_pt_gp_valid_id);                           \
2235                 return -EINVAL;                                         \
2236         }                                                               \
2237                                                                         \
2238         ret = kstrtoul(p, 0, &tmp);                                     \
2239         if (ret < 0) {                                                  \
2240                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2241                 return -EINVAL;                                         \
2242         }                                                               \
2243         if (tmp > 1) {                                                  \
2244                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2245                 return -EINVAL;                                         \
2246         }                                                               \
2247         if (tmp)                                                        \
2248                 t->_var |= _bit;                                        \
2249         else                                                            \
2250                 t->_var &= ~_bit;                                       \
2251                                                                         \
2252         return c;                                                       \
2253 }
2254
2255 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2256                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2257 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2258                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2259 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2260
2261 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2262                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2263 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2264                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2265 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2266
2267 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2268                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2269 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2270                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2271 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2272
2273 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2274                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2275 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2276                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2277 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2278
2279 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2280                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2281 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2282                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2283 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2284
2285 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2286                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2287 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2288                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2289 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2290
2291 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2292                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2293 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2294                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2295 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2296
2297 /*
2298  * alua_write_metadata
2299  */
2300 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2301         struct t10_alua_tg_pt_gp *tg_pt_gp,
2302         char *page)
2303 {
2304         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2305 }
2306
2307 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2308         struct t10_alua_tg_pt_gp *tg_pt_gp,
2309         const char *page,
2310         size_t count)
2311 {
2312         unsigned long tmp;
2313         int ret;
2314
2315         ret = kstrtoul(page, 0, &tmp);
2316         if (ret < 0) {
2317                 pr_err("Unable to extract alua_write_metadata\n");
2318                 return ret;
2319         }
2320
2321         if ((tmp != 0) && (tmp != 1)) {
2322                 pr_err("Illegal value for alua_write_metadata:"
2323                         " %lu\n", tmp);
2324                 return -EINVAL;
2325         }
2326         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2327
2328         return count;
2329 }
2330
2331 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2332
2333
2334
2335 /*
2336  * nonop_delay_msecs
2337  */
2338 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2339         struct t10_alua_tg_pt_gp *tg_pt_gp,
2340         char *page)
2341 {
2342         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2343
2344 }
2345
2346 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2347         struct t10_alua_tg_pt_gp *tg_pt_gp,
2348         const char *page,
2349         size_t count)
2350 {
2351         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2352 }
2353
2354 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2355
2356 /*
2357  * trans_delay_msecs
2358  */
2359 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2360         struct t10_alua_tg_pt_gp *tg_pt_gp,
2361         char *page)
2362 {
2363         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2364 }
2365
2366 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2367         struct t10_alua_tg_pt_gp *tg_pt_gp,
2368         const char *page,
2369         size_t count)
2370 {
2371         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2372 }
2373
2374 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2375
2376 /*
2377  * implicit_trans_secs
2378  */
2379 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2380         struct t10_alua_tg_pt_gp *tg_pt_gp,
2381         char *page)
2382 {
2383         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2384 }
2385
2386 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2387         struct t10_alua_tg_pt_gp *tg_pt_gp,
2388         const char *page,
2389         size_t count)
2390 {
2391         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2392 }
2393
2394 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2395
2396 /*
2397  * preferred
2398  */
2399
2400 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2401         struct t10_alua_tg_pt_gp *tg_pt_gp,
2402         char *page)
2403 {
2404         return core_alua_show_preferred_bit(tg_pt_gp, page);
2405 }
2406
2407 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2408         struct t10_alua_tg_pt_gp *tg_pt_gp,
2409         const char *page,
2410         size_t count)
2411 {
2412         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2413 }
2414
2415 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2416
2417 /*
2418  * tg_pt_gp_id
2419  */
2420 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2421         struct t10_alua_tg_pt_gp *tg_pt_gp,
2422         char *page)
2423 {
2424         if (!tg_pt_gp->tg_pt_gp_valid_id)
2425                 return 0;
2426
2427         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2428 }
2429
2430 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2431         struct t10_alua_tg_pt_gp *tg_pt_gp,
2432         const char *page,
2433         size_t count)
2434 {
2435         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2436         unsigned long tg_pt_gp_id;
2437         int ret;
2438
2439         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2440         if (ret < 0) {
2441                 pr_err("kstrtoul() returned %d for"
2442                         " tg_pt_gp_id\n", ret);
2443                 return ret;
2444         }
2445         if (tg_pt_gp_id > 0x0000ffff) {
2446                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2447                         " 0x0000ffff\n", tg_pt_gp_id);
2448                 return -EINVAL;
2449         }
2450
2451         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2452         if (ret < 0)
2453                 return -EINVAL;
2454
2455         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2456                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2457                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2458                 tg_pt_gp->tg_pt_gp_id);
2459
2460         return count;
2461 }
2462
2463 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2464
2465 /*
2466  * members
2467  */
2468 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2469         struct t10_alua_tg_pt_gp *tg_pt_gp,
2470         char *page)
2471 {
2472         struct se_port *port;
2473         struct se_portal_group *tpg;
2474         struct se_lun *lun;
2475         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2476         ssize_t len = 0, cur_len;
2477         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2478
2479         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2480
2481         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2482         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2483                         tg_pt_gp_mem_list) {
2484                 port = tg_pt_gp_mem->tg_pt;
2485                 tpg = port->sep_tpg;
2486                 lun = port->sep_lun;
2487
2488                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2489                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2490                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2491                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2492                         config_item_name(&lun->lun_group.cg_item));
2493                 cur_len++; /* Extra byte for NULL terminator */
2494
2495                 if ((cur_len + len) > PAGE_SIZE) {
2496                         pr_warn("Ran out of lu_gp_show_attr"
2497                                 "_members buffer\n");
2498                         break;
2499                 }
2500                 memcpy(page+len, buf, cur_len);
2501                 len += cur_len;
2502         }
2503         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2504
2505         return len;
2506 }
2507
2508 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2509
2510 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2511                         tg_pt_gp_group);
2512
2513 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2514         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2515         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2516         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2517         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2518         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2519         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2520         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2521         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2522         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2523         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2524         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2525         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2526         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2527         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2528         &target_core_alua_tg_pt_gp_preferred.attr,
2529         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2530         &target_core_alua_tg_pt_gp_members.attr,
2531         NULL,
2532 };
2533
2534 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2535 {
2536         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2537                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2538
2539         core_alua_free_tg_pt_gp(tg_pt_gp);
2540 }
2541
2542 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2543         .release                = target_core_alua_tg_pt_gp_release,
2544         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2545         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2546 };
2547
2548 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2549         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2550         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2551         .ct_owner               = THIS_MODULE,
2552 };
2553
2554 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2555
2556 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2557
2558 static struct config_group *target_core_alua_create_tg_pt_gp(
2559         struct config_group *group,
2560         const char *name)
2561 {
2562         struct t10_alua *alua = container_of(group, struct t10_alua,
2563                                         alua_tg_pt_gps_group);
2564         struct t10_alua_tg_pt_gp *tg_pt_gp;
2565         struct config_group *alua_tg_pt_gp_cg = NULL;
2566         struct config_item *alua_tg_pt_gp_ci = NULL;
2567
2568         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2569         if (!tg_pt_gp)
2570                 return NULL;
2571
2572         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2573         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2574
2575         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2576                         &target_core_alua_tg_pt_gp_cit);
2577
2578         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2579                 " Group: alua/tg_pt_gps/%s\n",
2580                 config_item_name(alua_tg_pt_gp_ci));
2581
2582         return alua_tg_pt_gp_cg;
2583 }
2584
2585 static void target_core_alua_drop_tg_pt_gp(
2586         struct config_group *group,
2587         struct config_item *item)
2588 {
2589         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2590                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2591
2592         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2593                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2594                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2595         /*
2596          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2597          * -> target_core_alua_tg_pt_gp_release().
2598          */
2599         config_item_put(item);
2600 }
2601
2602 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2603         .make_group             = &target_core_alua_create_tg_pt_gp,
2604         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2605 };
2606
2607 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2608
2609 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2610
2611 /* Start functions for struct config_item_type target_core_alua_cit */
2612
2613 /*
2614  * target_core_alua_cit is a ConfigFS group that lives under
2615  * /sys/kernel/config/target/core/alua.  There are default groups
2616  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2617  * target_core_alua_cit in target_core_init_configfs() below.
2618  */
2619 static struct config_item_type target_core_alua_cit = {
2620         .ct_item_ops            = NULL,
2621         .ct_attrs               = NULL,
2622         .ct_owner               = THIS_MODULE,
2623 };
2624
2625 /* End functions for struct config_item_type target_core_alua_cit */
2626
2627 /* Start functions for struct config_item_type tb_dev_stat_cit */
2628
2629 static struct config_group *target_core_stat_mkdir(
2630         struct config_group *group,
2631         const char *name)
2632 {
2633         return ERR_PTR(-ENOSYS);
2634 }
2635
2636 static void target_core_stat_rmdir(
2637         struct config_group *group,
2638         struct config_item *item)
2639 {
2640         return;
2641 }
2642
2643 static struct configfs_group_operations target_core_stat_group_ops = {
2644         .make_group             = &target_core_stat_mkdir,
2645         .drop_item              = &target_core_stat_rmdir,
2646 };
2647
2648 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2649
2650 /* End functions for struct config_item_type tb_dev_stat_cit */
2651
2652 /* Start functions for struct config_item_type target_core_hba_cit */
2653
2654 static struct config_group *target_core_make_subdev(
2655         struct config_group *group,
2656         const char *name)
2657 {
2658         struct t10_alua_tg_pt_gp *tg_pt_gp;
2659         struct config_item *hba_ci = &group->cg_item;
2660         struct se_hba *hba = item_to_hba(hba_ci);
2661         struct target_backend *tb = hba->backend;
2662         struct se_device *dev;
2663         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2664         struct config_group *dev_stat_grp = NULL;
2665         int errno = -ENOMEM, ret;
2666
2667         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2668         if (ret)
2669                 return ERR_PTR(ret);
2670
2671         dev = target_alloc_device(hba, name);
2672         if (!dev)
2673                 goto out_unlock;
2674
2675         dev_cg = &dev->dev_group;
2676
2677         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2678                         GFP_KERNEL);
2679         if (!dev_cg->default_groups)
2680                 goto out_free_device;
2681
2682         config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
2683         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2684                         &tb->tb_dev_attrib_cit);
2685         config_group_init_type_name(&dev->dev_pr_group, "pr",
2686                         &tb->tb_dev_pr_cit);
2687         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2688                         &tb->tb_dev_wwn_cit);
2689         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2690                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2691         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2692                         "statistics", &tb->tb_dev_stat_cit);
2693
2694         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2695         dev_cg->default_groups[1] = &dev->dev_pr_group;
2696         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2697         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2698         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2699         dev_cg->default_groups[5] = NULL;
2700         /*
2701          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2702          */
2703         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2704         if (!tg_pt_gp)
2705                 goto out_free_dev_cg_default_groups;
2706         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2707
2708         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2709         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2710                                 GFP_KERNEL);
2711         if (!tg_pt_gp_cg->default_groups) {
2712                 pr_err("Unable to allocate tg_pt_gp_cg->"
2713                                 "default_groups\n");
2714                 goto out_free_tg_pt_gp;
2715         }
2716
2717         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2718                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2719         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2720         tg_pt_gp_cg->default_groups[1] = NULL;
2721         /*
2722          * Add core/$HBA/$DEV/statistics/ default groups
2723          */
2724         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2725         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2726                                 GFP_KERNEL);
2727         if (!dev_stat_grp->default_groups) {
2728                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2729                 goto out_free_tg_pt_gp_cg_default_groups;
2730         }
2731         target_stat_setup_dev_default_groups(dev);
2732
2733         mutex_unlock(&hba->hba_access_mutex);
2734         return dev_cg;
2735
2736 out_free_tg_pt_gp_cg_default_groups:
2737         kfree(tg_pt_gp_cg->default_groups);
2738 out_free_tg_pt_gp:
2739         core_alua_free_tg_pt_gp(tg_pt_gp);
2740 out_free_dev_cg_default_groups:
2741         kfree(dev_cg->default_groups);
2742 out_free_device:
2743         target_free_device(dev);
2744 out_unlock:
2745         mutex_unlock(&hba->hba_access_mutex);
2746         return ERR_PTR(errno);
2747 }
2748
2749 static void target_core_drop_subdev(
2750         struct config_group *group,
2751         struct config_item *item)
2752 {
2753         struct config_group *dev_cg = to_config_group(item);
2754         struct se_device *dev =
2755                 container_of(dev_cg, struct se_device, dev_group);
2756         struct se_hba *hba;
2757         struct config_item *df_item;
2758         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2759         int i;
2760
2761         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2762
2763         mutex_lock(&hba->hba_access_mutex);
2764
2765         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2766         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2767                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2768                 dev_stat_grp->default_groups[i] = NULL;
2769                 config_item_put(df_item);
2770         }
2771         kfree(dev_stat_grp->default_groups);
2772
2773         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2774         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2775                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2776                 tg_pt_gp_cg->default_groups[i] = NULL;
2777                 config_item_put(df_item);
2778         }
2779         kfree(tg_pt_gp_cg->default_groups);
2780         /*
2781          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2782          * directly from target_core_alua_tg_pt_gp_release().
2783          */
2784         dev->t10_alua.default_tg_pt_gp = NULL;
2785
2786         for (i = 0; dev_cg->default_groups[i]; i++) {
2787                 df_item = &dev_cg->default_groups[i]->cg_item;
2788                 dev_cg->default_groups[i] = NULL;
2789                 config_item_put(df_item);
2790         }
2791         /*
2792          * se_dev is released from target_core_dev_item_ops->release()
2793          */
2794         config_item_put(item);
2795         mutex_unlock(&hba->hba_access_mutex);
2796 }
2797
2798 static struct configfs_group_operations target_core_hba_group_ops = {
2799         .make_group             = target_core_make_subdev,
2800         .drop_item              = target_core_drop_subdev,
2801 };
2802
2803 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2804 #define SE_HBA_ATTR(_name, _mode)                               \
2805 static struct target_core_hba_attribute                         \
2806                 target_core_hba_##_name =                       \
2807                 __CONFIGFS_EATTR(_name, _mode,                  \
2808                 target_core_hba_show_attr_##_name,              \
2809                 target_core_hba_store_attr_##_name);
2810
2811 #define SE_HBA_ATTR_RO(_name)                                   \
2812 static struct target_core_hba_attribute                         \
2813                 target_core_hba_##_name =                       \
2814                 __CONFIGFS_EATTR_RO(_name,                      \
2815                 target_core_hba_show_attr_##_name);
2816
2817 static ssize_t target_core_hba_show_attr_hba_info(
2818         struct se_hba *hba,
2819         char *page)
2820 {
2821         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2822                         hba->hba_id, hba->backend->ops->name,
2823                         TARGET_CORE_CONFIGFS_VERSION);
2824 }
2825
2826 SE_HBA_ATTR_RO(hba_info);
2827
2828 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2829                                 char *page)
2830 {
2831         int hba_mode = 0;
2832
2833         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2834                 hba_mode = 1;
2835
2836         return sprintf(page, "%d\n", hba_mode);
2837 }
2838
2839 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2840                                 const char *page, size_t count)
2841 {
2842         unsigned long mode_flag;
2843         int ret;
2844
2845         if (hba->backend->ops->pmode_enable_hba == NULL)
2846                 return -EINVAL;
2847
2848         ret = kstrtoul(page, 0, &mode_flag);
2849         if (ret < 0) {
2850                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2851                 return ret;
2852         }
2853
2854         if (hba->dev_count) {
2855                 pr_err("Unable to set hba_mode with active devices\n");
2856                 return -EINVAL;
2857         }
2858
2859         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
2860         if (ret < 0)
2861                 return -EINVAL;
2862         if (ret > 0)
2863                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2864         else if (ret == 0)
2865                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2866
2867         return count;
2868 }
2869
2870 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2871
2872 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2873
2874 static void target_core_hba_release(struct config_item *item)
2875 {
2876         struct se_hba *hba = container_of(to_config_group(item),
2877                                 struct se_hba, hba_group);
2878         core_delete_hba(hba);
2879 }
2880
2881 static struct configfs_attribute *target_core_hba_attrs[] = {
2882         &target_core_hba_hba_info.attr,
2883         &target_core_hba_hba_mode.attr,
2884         NULL,
2885 };
2886
2887 static struct configfs_item_operations target_core_hba_item_ops = {
2888         .release                = target_core_hba_release,
2889         .show_attribute         = target_core_hba_attr_show,
2890         .store_attribute        = target_core_hba_attr_store,
2891 };
2892
2893 static struct config_item_type target_core_hba_cit = {
2894         .ct_item_ops            = &target_core_hba_item_ops,
2895         .ct_group_ops           = &target_core_hba_group_ops,
2896         .ct_attrs               = target_core_hba_attrs,
2897         .ct_owner               = THIS_MODULE,
2898 };
2899
2900 static struct config_group *target_core_call_addhbatotarget(
2901         struct config_group *group,
2902         const char *name)
2903 {
2904         char *se_plugin_str, *str, *str2;
2905         struct se_hba *hba;
2906         char buf[TARGET_CORE_NAME_MAX_LEN];
2907         unsigned long plugin_dep_id = 0;
2908         int ret;
2909
2910         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2911         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2912                 pr_err("Passed *name strlen(): %d exceeds"
2913                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2914                         TARGET_CORE_NAME_MAX_LEN);
2915                 return ERR_PTR(-ENAMETOOLONG);
2916         }
2917         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2918
2919         str = strstr(buf, "_");
2920         if (!str) {
2921                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2922                 return ERR_PTR(-EINVAL);
2923         }
2924         se_plugin_str = buf;
2925         /*
2926          * Special case for subsystem plugins that have "_" in their names.
2927          * Namely rd_direct and rd_mcp..
2928          */
2929         str2 = strstr(str+1, "_");
2930         if (str2) {
2931                 *str2 = '\0'; /* Terminate for *se_plugin_str */
2932                 str2++; /* Skip to start of plugin dependent ID */
2933                 str = str2;
2934         } else {
2935                 *str = '\0'; /* Terminate for *se_plugin_str */
2936                 str++; /* Skip to start of plugin dependent ID */
2937         }
2938
2939         ret = kstrtoul(str, 0, &plugin_dep_id);
2940         if (ret < 0) {
2941                 pr_err("kstrtoul() returned %d for"
2942                                 " plugin_dep_id\n", ret);
2943                 return ERR_PTR(ret);
2944         }
2945         /*
2946          * Load up TCM subsystem plugins if they have not already been loaded.
2947          */
2948         transport_subsystem_check_init();
2949
2950         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2951         if (IS_ERR(hba))
2952                 return ERR_CAST(hba);
2953
2954         config_group_init_type_name(&hba->hba_group, name,
2955                         &target_core_hba_cit);
2956
2957         return &hba->hba_group;
2958 }
2959
2960 static void target_core_call_delhbafromtarget(
2961         struct config_group *group,
2962         struct config_item *item)
2963 {
2964         /*
2965          * core_delete_hba() is called from target_core_hba_item_ops->release()
2966          * -> target_core_hba_release()
2967          */
2968         config_item_put(item);
2969 }
2970
2971 static struct configfs_group_operations target_core_group_ops = {
2972         .make_group     = target_core_call_addhbatotarget,
2973         .drop_item      = target_core_call_delhbafromtarget,
2974 };
2975
2976 static struct config_item_type target_core_cit = {
2977         .ct_item_ops    = NULL,
2978         .ct_group_ops   = &target_core_group_ops,
2979         .ct_attrs       = NULL,
2980         .ct_owner       = THIS_MODULE,
2981 };
2982
2983 /* Stop functions for struct config_item_type target_core_hba_cit */
2984
2985 void target_setup_backend_cits(struct target_backend *tb)
2986 {
2987         target_core_setup_dev_cit(tb);
2988         target_core_setup_dev_attrib_cit(tb);
2989         target_core_setup_dev_pr_cit(tb);
2990         target_core_setup_dev_wwn_cit(tb);
2991         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
2992         target_core_setup_dev_stat_cit(tb);
2993 }
2994
2995 static int __init target_core_init_configfs(void)
2996 {
2997         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2998         struct config_group *lu_gp_cg = NULL;
2999         struct configfs_subsystem *subsys = &target_core_fabrics;
3000         struct t10_alua_lu_gp *lu_gp;
3001         int ret;
3002
3003         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3004                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3005                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3006
3007         config_group_init(&subsys->su_group);
3008         mutex_init(&subsys->su_mutex);
3009
3010         ret = init_se_kmem_caches();
3011         if (ret < 0)
3012                 return ret;
3013         /*
3014          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3015          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3016          */
3017         target_cg = &subsys->su_group;
3018         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3019                                 GFP_KERNEL);
3020         if (!target_cg->default_groups) {
3021                 pr_err("Unable to allocate target_cg->default_groups\n");
3022                 ret = -ENOMEM;
3023                 goto out_global;
3024         }
3025
3026         config_group_init_type_name(&target_core_hbagroup,
3027                         "core", &target_core_cit);
3028         target_cg->default_groups[0] = &target_core_hbagroup;
3029         target_cg->default_groups[1] = NULL;
3030         /*
3031          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3032          */
3033         hba_cg = &target_core_hbagroup;
3034         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3035                                 GFP_KERNEL);
3036         if (!hba_cg->default_groups) {
3037                 pr_err("Unable to allocate hba_cg->default_groups\n");
3038                 ret = -ENOMEM;
3039                 goto out_global;
3040         }
3041         config_group_init_type_name(&alua_group,
3042                         "alua", &target_core_alua_cit);
3043         hba_cg->default_groups[0] = &alua_group;
3044         hba_cg->default_groups[1] = NULL;
3045         /*
3046          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3047          * groups under /sys/kernel/config/target/core/alua/
3048          */
3049         alua_cg = &alua_group;
3050         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3051                         GFP_KERNEL);
3052         if (!alua_cg->default_groups) {
3053                 pr_err("Unable to allocate alua_cg->default_groups\n");
3054                 ret = -ENOMEM;
3055                 goto out_global;
3056         }
3057
3058         config_group_init_type_name(&alua_lu_gps_group,
3059                         "lu_gps", &target_core_alua_lu_gps_cit);
3060         alua_cg->default_groups[0] = &alua_lu_gps_group;
3061         alua_cg->default_groups[1] = NULL;
3062         /*
3063          * Add core/alua/lu_gps/default_lu_gp
3064          */
3065         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3066         if (IS_ERR(lu_gp)) {
3067                 ret = -ENOMEM;
3068                 goto out_global;
3069         }
3070
3071         lu_gp_cg = &alua_lu_gps_group;
3072         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3073                         GFP_KERNEL);
3074         if (!lu_gp_cg->default_groups) {
3075                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3076                 ret = -ENOMEM;
3077                 goto out_global;
3078         }
3079
3080         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3081                                 &target_core_alua_lu_gp_cit);
3082         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3083         lu_gp_cg->default_groups[1] = NULL;
3084         default_lu_gp = lu_gp;
3085         /*
3086          * Register the target_core_mod subsystem with configfs.
3087          */
3088         ret = configfs_register_subsystem(subsys);
3089         if (ret < 0) {
3090                 pr_err("Error %d while registering subsystem %s\n",
3091                         ret, subsys->su_group.cg_item.ci_namebuf);
3092                 goto out_global;
3093         }
3094         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3095                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3096                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3097         /*
3098          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3099          */
3100         ret = rd_module_init();
3101         if (ret < 0)
3102                 goto out;
3103
3104         ret = core_dev_setup_virtual_lun0();
3105         if (ret < 0)
3106                 goto out;
3107
3108         ret = target_xcopy_setup_pt();
3109         if (ret < 0)
3110                 goto out;
3111
3112         return 0;
3113
3114 out:
3115         configfs_unregister_subsystem(subsys);
3116         core_dev_release_virtual_lun0();
3117         rd_module_exit();
3118 out_global:
3119         if (default_lu_gp) {
3120                 core_alua_free_lu_gp(default_lu_gp);
3121                 default_lu_gp = NULL;
3122         }
3123         if (lu_gp_cg)
3124                 kfree(lu_gp_cg->default_groups);
3125         if (alua_cg)
3126                 kfree(alua_cg->default_groups);
3127         if (hba_cg)
3128                 kfree(hba_cg->default_groups);
3129         kfree(target_cg->default_groups);
3130         release_se_kmem_caches();
3131         return ret;
3132 }
3133
3134 static void __exit target_core_exit_configfs(void)
3135 {
3136         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3137         struct config_item *item;
3138         int i;
3139
3140         lu_gp_cg = &alua_lu_gps_group;
3141         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3142                 item = &lu_gp_cg->default_groups[i]->cg_item;
3143                 lu_gp_cg->default_groups[i] = NULL;
3144                 config_item_put(item);
3145         }
3146         kfree(lu_gp_cg->default_groups);
3147         lu_gp_cg->default_groups = NULL;
3148
3149         alua_cg = &alua_group;
3150         for (i = 0; alua_cg->default_groups[i]; i++) {
3151                 item = &alua_cg->default_groups[i]->cg_item;
3152                 alua_cg->default_groups[i] = NULL;
3153                 config_item_put(item);
3154         }
3155         kfree(alua_cg->default_groups);
3156         alua_cg->default_groups = NULL;
3157
3158         hba_cg = &target_core_hbagroup;
3159         for (i = 0; hba_cg->default_groups[i]; i++) {
3160                 item = &hba_cg->default_groups[i]->cg_item;
3161                 hba_cg->default_groups[i] = NULL;
3162                 config_item_put(item);
3163         }
3164         kfree(hba_cg->default_groups);
3165         hba_cg->default_groups = NULL;
3166         /*
3167          * We expect subsys->su_group.default_groups to be released
3168          * by configfs subsystem provider logic..
3169          */
3170         configfs_unregister_subsystem(&target_core_fabrics);
3171         kfree(target_core_fabrics.su_group.default_groups);
3172
3173         core_alua_free_lu_gp(default_lu_gp);
3174         default_lu_gp = NULL;
3175
3176         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3177                         " Infrastructure\n");
3178
3179         core_dev_release_virtual_lun0();
3180         rd_module_exit();
3181         target_xcopy_release_pt();
3182         release_se_kmem_caches();
3183 }
3184
3185 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3186 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3187 MODULE_LICENSE("GPL");
3188
3189 module_init(target_core_init_configfs);
3190 module_exit(target_core_exit_configfs);