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 extern struct t10_alua_lu_gp *default_lu_gp;
  54
  55 static LIST_HEAD(g_tf_list);
  56 static DEFINE_MUTEX(g_tf_lock);
  57
  58 struct target_core_configfs_attribute {
  59         struct configfs_attribute attr;
  60         ssize_t (*show)(void *, char *);
  61         ssize_t (*store)(void *, const char *, size_t);
  62 };
  63
  64 static struct config_group target_core_hbagroup;
  65 static struct config_group alua_group;
  66 static struct config_group alua_lu_gps_group;
  67
  68 static inline struct se_hba *
  69 item_to_hba(struct config_item *item)
  70 {
  71         return container_of(to_config_group(item), struct se_hba, hba_group);
  72 }
  73
  74 /*
  75  * Attributes for /sys/kernel/config/target/
  76  */
  77 static ssize_t target_core_attr_show(struct config_item *item,
  78                                       struct configfs_attribute *attr,
  79                                       char *page)
  80 {
  81         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  82                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  83                 utsname()->sysname, utsname()->machine);
  84 }
  85
  86 static struct configfs_item_operations target_core_fabric_item_ops = {
  87         .show_attribute = target_core_attr_show,
  88 };
  89
  90 static struct configfs_attribute target_core_item_attr_version = {
  91         .ca_owner       = THIS_MODULE,
  92         .ca_name        = "version",
  93         .ca_mode        = S_IRUGO,
  94 };
  95
  96 static struct target_fabric_configfs *target_core_get_fabric(
  97         const char *name)
  98 {
  99         struct target_fabric_configfs *tf;
 100
 101         if (!name)
 102                 return NULL;
 103
 104         mutex_lock(&g_tf_lock);
 105         list_for_each_entry(tf, &g_tf_list, tf_list) {
 106                 if (!strcmp(tf->tf_name, name)) {
 107                         atomic_inc(&tf->tf_access_cnt);
 108                         mutex_unlock(&g_tf_lock);
 109                         return tf;
 110                 }
 111         }
 112         mutex_unlock(&g_tf_lock);
 113
 114         return NULL;
 115 }
 116
 117 /*
 118  * Called from struct target_core_group_ops->make_group()
 119  */
 120 static struct config_group *target_core_register_fabric(
 121         struct config_group *group,
 122         const char *name)
 123 {
 124         struct target_fabric_configfs *tf;
 125         int ret;
 126
 127         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 128                         " %s\n", group, name);
 129         /*
 130          * Below are some hardcoded request_module() calls to automatically
 131          * local fabric modules when the following is called:
 132          *
 133          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 134          *
 135          * Note that this does not limit which TCM fabric module can be
 136          * registered, but simply provids auto loading logic for modules with
 137          * mkdir(2) system calls with known TCM fabric modules.
 138          */
 139         if (!strncmp(name, "iscsi", 5)) {
 140                 /*
 141                  * Automatically load the LIO Target fabric module when the
 142                  * following is called:
 143                  *
 144                  * mkdir -p $CONFIGFS/target/iscsi
 145                  */
 146                 ret = request_module("iscsi_target_mod");
 147                 if (ret < 0) {
 148                         pr_err("request_module() failed for"
 149                                 " iscsi_target_mod.ko: %d\n", ret);
 150                         return ERR_PTR(-EINVAL);
 151                 }
 152         } else if (!strncmp(name, "loopback", 8)) {
 153                 /*
 154                  * Automatically load the tcm_loop fabric module when the
 155                  * following is called:
 156                  *
 157                  * mkdir -p $CONFIGFS/target/loopback
 158                  */
 159                 ret = request_module("tcm_loop");
 160                 if (ret < 0) {
 161                         pr_err("request_module() failed for"
 162                                 " tcm_loop.ko: %d\n", ret);
 163                         return ERR_PTR(-EINVAL);
 164                 }
 165         }
 166
 167         tf = target_core_get_fabric(name);
 168         if (!tf) {
 169                 pr_err("target_core_get_fabric() failed for %s\n",
 170                         name);
 171                 return ERR_PTR(-EINVAL);
 172         }
 173         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 174                         " %s\n", tf->tf_name);
 175         /*
 176          * On a successful target_core_get_fabric() look, the returned
 177          * struct target_fabric_configfs *tf will contain a usage reference.
 178          */
 179         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 180                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 181
 182         tf->tf_group.default_groups = tf->tf_default_groups;
 183         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 184         tf->tf_group.default_groups[1] = NULL;
 185
 186         config_group_init_type_name(&tf->tf_group, name,
 187                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 188         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 189                         &tf->tf_cit_tmpl.tfc_discovery_cit);
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 192                         " %s\n", tf->tf_group.cg_item.ci_name);
 193         /*
 194          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 195          */
 196         tf->tf_ops.tf_subsys = tf->tf_subsys;
 197         tf->tf_fabric = &tf->tf_group.cg_item;
 198         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 199                         " for %s\n", name);
 200
 201         return &tf->tf_group;
 202 }
 203
 204 /*
 205  * Called from struct target_core_group_ops->drop_item()
 206  */
 207 static void target_core_deregister_fabric(
 208         struct config_group *group,
 209         struct config_item *item)
 210 {
 211         struct target_fabric_configfs *tf = container_of(
 212                 to_config_group(item), struct target_fabric_configfs, tf_group);
 213         struct config_group *tf_group;
 214         struct config_item *df_item;
 215         int i;
 216
 217         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 218                 " tf list\n", config_item_name(item));
 219
 220         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 221                         " %s\n", tf->tf_name);
 222         atomic_dec(&tf->tf_access_cnt);
 223
 224         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 225                         " tf->tf_fabric for %s\n", tf->tf_name);
 226         tf->tf_fabric = NULL;
 227
 228         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 229                         " %s\n", config_item_name(item));
 230
 231         tf_group = &tf->tf_group;
 232         for (i = 0; tf_group->default_groups[i]; i++) {
 233                 df_item = &tf_group->default_groups[i]->cg_item;
 234                 tf_group->default_groups[i] = NULL;
 235                 config_item_put(df_item);
 236         }
 237         config_item_put(item);
 238 }
 239
 240 static struct configfs_group_operations target_core_fabric_group_ops = {
 241         .make_group     = &target_core_register_fabric,
 242         .drop_item      = &target_core_deregister_fabric,
 243 };
 244
 245 /*
 246  * All item attributes appearing in /sys/kernel/target/ appear here.
 247  */
 248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 249         &target_core_item_attr_version,
 250         NULL,
 251 };
 252
 253 /*
 254  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 255  */
 256 static struct config_item_type target_core_fabrics_item = {
 257         .ct_item_ops    = &target_core_fabric_item_ops,
 258         .ct_group_ops   = &target_core_fabric_group_ops,
 259         .ct_attrs       = target_core_fabric_item_attrs,
 260         .ct_owner       = THIS_MODULE,
 261 };
 262
 263 static struct configfs_subsystem target_core_fabrics = {
 264         .su_group = {
 265                 .cg_item = {
 266                         .ci_namebuf = "target",
 267                         .ci_type = &target_core_fabrics_item,
 268                 },
 269         },
 270 };
 271
 272 struct configfs_subsystem *target_core_subsystem[] = {
 273         &target_core_fabrics,
 274         NULL,
 275 };
 276
 277 /*##############################################################################
 278 // Start functions called by external Target Fabrics Modules
 279 //############################################################################*/
 280
 281 /*
 282  * First function called by fabric modules to:
 283  *
 284  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 285  * 2) Add struct target_fabric_configfs to g_tf_list
 286  * 3) Return struct target_fabric_configfs to fabric module to be passed
 287  *    into target_fabric_configfs_register().
 288  */
 289 struct target_fabric_configfs *target_fabric_configfs_init(
 290         struct module *fabric_mod,
 291         const char *name)
 292 {
 293         struct target_fabric_configfs *tf;
 294
 295         if (!(name)) {
 296                 pr_err("Unable to locate passed fabric name\n");
 297                 return ERR_PTR(-EINVAL);
 298         }
 299         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 300                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 301                         "_NAME_SIZE\n", name);
 302                 return ERR_PTR(-EINVAL);
 303         }
 304
 305         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 306         if (!tf)
 307                 return ERR_PTR(-ENOMEM);
 308
 309         INIT_LIST_HEAD(&tf->tf_list);
 310         atomic_set(&tf->tf_access_cnt, 0);
 311         /*
 312          * Setup the default generic struct config_item_type's (cits) in
 313          * struct target_fabric_configfs->tf_cit_tmpl
 314          */
 315         tf->tf_module = fabric_mod;
 316         target_fabric_setup_cits(tf);
 317
 318         tf->tf_subsys = target_core_subsystem[0];
 319         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 320
 321         mutex_lock(&g_tf_lock);
 322         list_add_tail(&tf->tf_list, &g_tf_list);
 323         mutex_unlock(&g_tf_lock);
 324
 325         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 326                         ">>>>>>>>>>>>>>\n");
 327         pr_debug("Initialized struct target_fabric_configfs: %p for"
 328                         " %s\n", tf, tf->tf_name);
 329         return tf;
 330 }
 331 EXPORT_SYMBOL(target_fabric_configfs_init);
 332
 333 /*
 334  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 335  */
 336 void target_fabric_configfs_free(
 337         struct target_fabric_configfs *tf)
 338 {
 339         mutex_lock(&g_tf_lock);
 340         list_del(&tf->tf_list);
 341         mutex_unlock(&g_tf_lock);
 342
 343         kfree(tf);
 344 }
 345 EXPORT_SYMBOL(target_fabric_configfs_free);
 346
 347 /*
 348  * Perform a sanity check of the passed tf->tf_ops before completing
 349  * TCM fabric module registration.
 350  */
 351 static int target_fabric_tf_ops_check(
 352         struct target_fabric_configfs *tf)
 353 {
 354         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 355
 356         if (!tfo->get_fabric_name) {
 357                 pr_err("Missing tfo->get_fabric_name()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->get_fabric_proto_ident) {
 361                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_get_wwn) {
 365                 pr_err("Missing tfo->tpg_get_wwn()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_get_tag) {
 369                 pr_err("Missing tfo->tpg_get_tag()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_get_default_depth) {
 373                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_get_pr_transport_id) {
 377                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_pr_transport_id_len) {
 381                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->tpg_check_demo_mode) {
 385                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->tpg_check_demo_mode_cache) {
 389                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->tpg_check_demo_mode_write_protect) {
 393                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->tpg_check_prod_mode_write_protect) {
 397                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->tpg_alloc_fabric_acl) {
 401                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->tpg_release_fabric_acl) {
 405                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->tpg_get_inst_index) {
 409                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->release_cmd) {
 413                 pr_err("Missing tfo->release_cmd()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->shutdown_session) {
 417                 pr_err("Missing tfo->shutdown_session()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->close_session) {
 421                 pr_err("Missing tfo->close_session()\n");
 422                 return -EINVAL;
 423         }
 424         if (!tfo->sess_get_index) {
 425                 pr_err("Missing tfo->sess_get_index()\n");
 426                 return -EINVAL;
 427         }
 428         if (!tfo->write_pending) {
 429                 pr_err("Missing tfo->write_pending()\n");
 430                 return -EINVAL;
 431         }
 432         if (!tfo->write_pending_status) {
 433                 pr_err("Missing tfo->write_pending_status()\n");
 434                 return -EINVAL;
 435         }
 436         if (!tfo->set_default_node_attributes) {
 437                 pr_err("Missing tfo->set_default_node_attributes()\n");
 438                 return -EINVAL;
 439         }
 440         if (!tfo->get_task_tag) {
 441                 pr_err("Missing tfo->get_task_tag()\n");
 442                 return -EINVAL;
 443         }
 444         if (!tfo->get_cmd_state) {
 445                 pr_err("Missing tfo->get_cmd_state()\n");
 446                 return -EINVAL;
 447         }
 448         if (!tfo->queue_data_in) {
 449                 pr_err("Missing tfo->queue_data_in()\n");
 450                 return -EINVAL;
 451         }
 452         if (!tfo->queue_status) {
 453                 pr_err("Missing tfo->queue_status()\n");
 454                 return -EINVAL;
 455         }
 456         if (!tfo->queue_tm_rsp) {
 457                 pr_err("Missing tfo->queue_tm_rsp()\n");
 458                 return -EINVAL;
 459         }
 460         /*
 461          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 462          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 463          * target_core_fabric_configfs.c WWN+TPG group context code.
 464          */
 465         if (!tfo->fabric_make_wwn) {
 466                 pr_err("Missing tfo->fabric_make_wwn()\n");
 467                 return -EINVAL;
 468         }
 469         if (!tfo->fabric_drop_wwn) {
 470                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 471                 return -EINVAL;
 472         }
 473         if (!tfo->fabric_make_tpg) {
 474                 pr_err("Missing tfo->fabric_make_tpg()\n");
 475                 return -EINVAL;
 476         }
 477         if (!tfo->fabric_drop_tpg) {
 478                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 479                 return -EINVAL;
 480         }
 481
 482         return 0;
 483 }
 484
 485 /*
 486  * Called 2nd from fabric module with returned parameter of
 487  * struct target_fabric_configfs * from target_fabric_configfs_init().
 488  *
 489  * Upon a successful registration, the new fabric's struct config_item is
 490  * return.  Also, a pointer to this struct is set in the passed
 491  * struct target_fabric_configfs.
 492  */
 493 int target_fabric_configfs_register(
 494         struct target_fabric_configfs *tf)
 495 {
 496         int ret;
 497
 498         if (!tf) {
 499                 pr_err("Unable to locate target_fabric_configfs"
 500                         " pointer\n");
 501                 return -EINVAL;
 502         }
 503         if (!tf->tf_subsys) {
 504                 pr_err("Unable to target struct config_subsystem"
 505                         " pointer\n");
 506                 return -EINVAL;
 507         }
 508         ret = target_fabric_tf_ops_check(tf);
 509         if (ret < 0)
 510                 return ret;
 511
 512         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 513                 ">>>>>>>>>>\n");
 514         return 0;
 515 }
 516 EXPORT_SYMBOL(target_fabric_configfs_register);
 517
 518 void target_fabric_configfs_deregister(
 519         struct target_fabric_configfs *tf)
 520 {
 521         struct configfs_subsystem *su;
 522
 523         if (!tf) {
 524                 pr_err("Unable to locate passed target_fabric_"
 525                         "configfs\n");
 526                 return;
 527         }
 528         su = tf->tf_subsys;
 529         if (!su) {
 530                 pr_err("Unable to locate passed tf->tf_subsys"
 531                         " pointer\n");
 532                 return;
 533         }
 534         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 535                         ">>>>>>>>>>>>\n");
 536         mutex_lock(&g_tf_lock);
 537         if (atomic_read(&tf->tf_access_cnt)) {
 538                 mutex_unlock(&g_tf_lock);
 539                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 540                         tf->tf_name);
 541                 BUG();
 542         }
 543         list_del(&tf->tf_list);
 544         mutex_unlock(&g_tf_lock);
 545
 546         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 547                         " %s\n", tf->tf_name);
 548         tf->tf_module = NULL;
 549         tf->tf_subsys = NULL;
 550         kfree(tf);
 551
 552         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 553                         ">>>>>\n");
 554 }
 555 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 556
 557 /*##############################################################################
 558 // Stop functions called by external Target Fabrics Modules
 559 //############################################################################*/
 560
 561 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 562
 563 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 564 static ssize_t target_core_dev_show_attr_##_name(                       \
 565         struct se_dev_attrib *da,                                       \
 566         char *page)                                                     \
 567 {                                                                       \
 568         return snprintf(page, PAGE_SIZE, "%u\n",                        \
 569                 (u32)da->da_dev->dev_attrib._name);                     \
 570 }
 571
 572 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 573 static ssize_t target_core_dev_store_attr_##_name(                      \
 574         struct se_dev_attrib *da,                                       \
 575         const char *page,                                               \
 576         size_t count)                                                   \
 577 {                                                                       \
 578         unsigned long val;                                              \
 579         int ret;                                                        \
 580                                                                         \
 581         ret = kstrtoul(page, 0, &val);                          \
 582         if (ret < 0) {                                                  \
 583                 pr_err("kstrtoul() failed with"         \
 584                         " ret: %d\n", ret);                             \
 585                 return -EINVAL;                                         \
 586         }                                                               \
 587         ret = se_dev_set_##_name(da->da_dev, (u32)val);                 \
 588                                                                         \
 589         return (!ret) ? count : -EINVAL;                                \
 590 }
 591
 592 #define DEF_DEV_ATTRIB(_name)                                           \
 593 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 594 DEF_DEV_ATTRIB_STORE(_name);
 595
 596 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 597 DEF_DEV_ATTRIB_SHOW(_name);
 598
 599 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 600 #define SE_DEV_ATTR(_name, _mode)                                       \
 601 static struct target_core_dev_attrib_attribute                          \
 602                         target_core_dev_attrib_##_name =                \
 603                 __CONFIGFS_EATTR(_name, _mode,                          \
 604                 target_core_dev_show_attr_##_name,                      \
 605                 target_core_dev_store_attr_##_name);
 606
 607 #define SE_DEV_ATTR_RO(_name);                                          \
 608 static struct target_core_dev_attrib_attribute                          \
 609                         target_core_dev_attrib_##_name =                \
 610         __CONFIGFS_EATTR_RO(_name,                                      \
 611         target_core_dev_show_attr_##_name);
 612
 613 DEF_DEV_ATTRIB(emulate_model_alias);
 614 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
 615
 616 DEF_DEV_ATTRIB(emulate_dpo);
 617 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 618
 619 DEF_DEV_ATTRIB(emulate_fua_write);
 620 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 621
 622 DEF_DEV_ATTRIB(emulate_fua_read);
 623 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 624
 625 DEF_DEV_ATTRIB(emulate_write_cache);
 626 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 627
 628 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 629 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 630
 631 DEF_DEV_ATTRIB(emulate_tas);
 632 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 633
 634 DEF_DEV_ATTRIB(emulate_tpu);
 635 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 636
 637 DEF_DEV_ATTRIB(emulate_tpws);
 638 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 639
 640 DEF_DEV_ATTRIB(emulate_caw);
 641 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
 642
 643 DEF_DEV_ATTRIB(emulate_3pc);
 644 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
 645
 646 DEF_DEV_ATTRIB(pi_prot_type);
 647 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
 648
 649 DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
 650 SE_DEV_ATTR_RO(hw_pi_prot_type);
 651
 652 DEF_DEV_ATTRIB(pi_prot_format);
 653 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
 654
 655 DEF_DEV_ATTRIB(enforce_pr_isids);
 656 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 657
 658 DEF_DEV_ATTRIB(is_nonrot);
 659 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 660
 661 DEF_DEV_ATTRIB(emulate_rest_reord);
 662 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 663
 664 DEF_DEV_ATTRIB_RO(hw_block_size);
 665 SE_DEV_ATTR_RO(hw_block_size);
 666
 667 DEF_DEV_ATTRIB(block_size);
 668 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 669
 670 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 671 SE_DEV_ATTR_RO(hw_max_sectors);
 672
 673 DEF_DEV_ATTRIB(fabric_max_sectors);
 674 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 675
 676 DEF_DEV_ATTRIB(optimal_sectors);
 677 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 678
 679 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 680 SE_DEV_ATTR_RO(hw_queue_depth);
 681
 682 DEF_DEV_ATTRIB(queue_depth);
 683 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 684
 685 DEF_DEV_ATTRIB(max_unmap_lba_count);
 686 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 687
 688 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 689 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 690
 691 DEF_DEV_ATTRIB(unmap_granularity);
 692 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 693
 694 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 695 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 696
 697 DEF_DEV_ATTRIB(max_write_same_len);
 698 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
 699
 700 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 701
 702 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 703         &target_core_dev_attrib_emulate_model_alias.attr,
 704         &target_core_dev_attrib_emulate_dpo.attr,
 705         &target_core_dev_attrib_emulate_fua_write.attr,
 706         &target_core_dev_attrib_emulate_fua_read.attr,
 707         &target_core_dev_attrib_emulate_write_cache.attr,
 708         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 709         &target_core_dev_attrib_emulate_tas.attr,
 710         &target_core_dev_attrib_emulate_tpu.attr,
 711         &target_core_dev_attrib_emulate_tpws.attr,
 712         &target_core_dev_attrib_emulate_caw.attr,
 713         &target_core_dev_attrib_emulate_3pc.attr,
 714         &target_core_dev_attrib_pi_prot_type.attr,
 715         &target_core_dev_attrib_hw_pi_prot_type.attr,
 716         &target_core_dev_attrib_pi_prot_format.attr,
 717         &target_core_dev_attrib_enforce_pr_isids.attr,
 718         &target_core_dev_attrib_is_nonrot.attr,
 719         &target_core_dev_attrib_emulate_rest_reord.attr,
 720         &target_core_dev_attrib_hw_block_size.attr,
 721         &target_core_dev_attrib_block_size.attr,
 722         &target_core_dev_attrib_hw_max_sectors.attr,
 723         &target_core_dev_attrib_fabric_max_sectors.attr,
 724         &target_core_dev_attrib_optimal_sectors.attr,
 725         &target_core_dev_attrib_hw_queue_depth.attr,
 726         &target_core_dev_attrib_queue_depth.attr,
 727         &target_core_dev_attrib_max_unmap_lba_count.attr,
 728         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 729         &target_core_dev_attrib_unmap_granularity.attr,
 730         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 731         &target_core_dev_attrib_max_write_same_len.attr,
 732         NULL,
 733 };
 734
 735 static struct configfs_item_operations target_core_dev_attrib_ops = {
 736         .show_attribute         = target_core_dev_attrib_attr_show,
 737         .store_attribute        = target_core_dev_attrib_attr_store,
 738 };
 739
 740 static struct config_item_type target_core_dev_attrib_cit = {
 741         .ct_item_ops            = &target_core_dev_attrib_ops,
 742         .ct_attrs               = target_core_dev_attrib_attrs,
 743         .ct_owner               = THIS_MODULE,
 744 };
 745
 746 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 747
 748 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 749
 750 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 751 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 752 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 753                 __CONFIGFS_EATTR(_name, _mode,                          \
 754                 target_core_dev_wwn_show_attr_##_name,                  \
 755                 target_core_dev_wwn_store_attr_##_name);
 756
 757 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 758 do {                                                                    \
 759         static struct target_core_dev_wwn_attribute                     \
 760                         target_core_dev_wwn_##_name =                   \
 761                 __CONFIGFS_EATTR_RO(_name,                              \
 762                 target_core_dev_wwn_show_attr_##_name);                 \
 763 } while (0);
 764
 765 /*
 766  * VPD page 0x80 Unit serial
 767  */
 768 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 769         struct t10_wwn *t10_wwn,
 770         char *page)
 771 {
 772         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 773                 &t10_wwn->unit_serial[0]);
 774 }
 775
 776 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 777         struct t10_wwn *t10_wwn,
 778         const char *page,
 779         size_t count)
 780 {
 781         struct se_device *dev = t10_wwn->t10_dev;
 782         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 783
 784         /*
 785          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 786          * from the struct scsi_device level firmware, do not allow
 787          * VPD Unit Serial to be emulated.
 788          *
 789          * Note this struct scsi_device could also be emulating VPD
 790          * information from its drivers/scsi LLD.  But for now we assume
 791          * it is doing 'the right thing' wrt a world wide unique
 792          * VPD Unit Serial Number that OS dependent multipath can depend on.
 793          */
 794         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 795                 pr_err("Underlying SCSI device firmware provided VPD"
 796                         " Unit Serial, ignoring request\n");
 797                 return -EOPNOTSUPP;
 798         }
 799
 800         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 801                 pr_err("Emulated VPD Unit Serial exceeds"
 802                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 803                 return -EOVERFLOW;
 804         }
 805         /*
 806          * Check to see if any active $FABRIC_MOD exports exist.  If they
 807          * do exist, fail here as changing this information on the fly
 808          * (underneath the initiator side OS dependent multipath code)
 809          * could cause negative effects.
 810          */
 811         if (dev->export_count) {
 812                 pr_err("Unable to set VPD Unit Serial while"
 813                         " active %d $FABRIC_MOD exports exist\n",
 814                         dev->export_count);
 815                 return -EINVAL;
 816         }
 817
 818         /*
 819          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 820          *
 821          * Also, strip any newline added from the userspace
 822          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 823          */
 824         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 825         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 826         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 827                         "%s", strstrip(buf));
 828         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 829
 830         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 831                         " %s\n", dev->t10_wwn.unit_serial);
 832
 833         return count;
 834 }
 835
 836 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 837
 838 /*
 839  * VPD page 0x83 Protocol Identifier
 840  */
 841 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 842         struct t10_wwn *t10_wwn,
 843         char *page)
 844 {
 845         struct t10_vpd *vpd;
 846         unsigned char buf[VPD_TMP_BUF_SIZE];
 847         ssize_t len = 0;
 848
 849         memset(buf, 0, VPD_TMP_BUF_SIZE);
 850
 851         spin_lock(&t10_wwn->t10_vpd_lock);
 852         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 853                 if (!vpd->protocol_identifier_set)
 854                         continue;
 855
 856                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 857
 858                 if (len + strlen(buf) >= PAGE_SIZE)
 859                         break;
 860
 861                 len += sprintf(page+len, "%s", buf);
 862         }
 863         spin_unlock(&t10_wwn->t10_vpd_lock);
 864
 865         return len;
 866 }
 867
 868 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 869         struct t10_wwn *t10_wwn,
 870         const char *page,
 871         size_t count)
 872 {
 873         return -ENOSYS;
 874 }
 875
 876 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 877
 878 /*
 879  * Generic wrapper for dumping VPD identifiers by association.
 880  */
 881 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 882 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 883         struct t10_wwn *t10_wwn,                                        \
 884         char *page)                                                     \
 885 {                                                                       \
 886         struct t10_vpd *vpd;                                                    \
 887         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 888         ssize_t len = 0;                                                \
 889                                                                         \
 890         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 891         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 892                 if (vpd->association != _assoc)                         \
 893                         continue;                                       \
 894                                                                         \
 895                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 896                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 897                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 898                         break;                                          \
 899                 len += sprintf(page+len, "%s", buf);                    \
 900                                                                         \
 901                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 902                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 903                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 904                         break;                                          \
 905                 len += sprintf(page+len, "%s", buf);                    \
 906                                                                         \
 907                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 908                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 909                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 910                         break;                                          \
 911                 len += sprintf(page+len, "%s", buf);                    \
 912         }                                                               \
 913         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 914                                                                         \
 915         return len;                                                     \
 916 }
 917
 918 /*
 919  * VPD page 0x83 Association: Logical Unit
 920  */
 921 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 922
 923 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 924         struct t10_wwn *t10_wwn,
 925         const char *page,
 926         size_t count)
 927 {
 928         return -ENOSYS;
 929 }
 930
 931 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 932
 933 /*
 934  * VPD page 0x83 Association: Target Port
 935  */
 936 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 937
 938 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 939         struct t10_wwn *t10_wwn,
 940         const char *page,
 941         size_t count)
 942 {
 943         return -ENOSYS;
 944 }
 945
 946 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 947
 948 /*
 949  * VPD page 0x83 Association: SCSI Target Device
 950  */
 951 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 952
 953 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 954         struct t10_wwn *t10_wwn,
 955         const char *page,
 956         size_t count)
 957 {
 958         return -ENOSYS;
 959 }
 960
 961 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 962
 963 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 964
 965 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 966         &target_core_dev_wwn_vpd_unit_serial.attr,
 967         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 968         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 969         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 970         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 971         NULL,
 972 };
 973
 974 static struct configfs_item_operations target_core_dev_wwn_ops = {
 975         .show_attribute         = target_core_dev_wwn_attr_show,
 976         .store_attribute        = target_core_dev_wwn_attr_store,
 977 };
 978
 979 static struct config_item_type target_core_dev_wwn_cit = {
 980         .ct_item_ops            = &target_core_dev_wwn_ops,
 981         .ct_attrs               = target_core_dev_wwn_attrs,
 982         .ct_owner               = THIS_MODULE,
 983 };
 984
 985 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
 986
 987 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
 988
 989 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 990 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 991 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 992         __CONFIGFS_EATTR(_name, _mode,                                  \
 993         target_core_dev_pr_show_attr_##_name,                           \
 994         target_core_dev_pr_store_attr_##_name);
 995
 996 #define SE_DEV_PR_ATTR_RO(_name);                                       \
 997 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 998         __CONFIGFS_EATTR_RO(_name,                                      \
 999         target_core_dev_pr_show_attr_##_name);
1000
1001 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1002                 char *page)
1003 {
1004         struct se_node_acl *se_nacl;
1005         struct t10_pr_registration *pr_reg;
1006         char i_buf[PR_REG_ISID_ID_LEN];
1007
1008         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1009
1010         pr_reg = dev->dev_pr_res_holder;
1011         if (!pr_reg)
1012                 return sprintf(page, "No SPC-3 Reservation holder\n");
1013
1014         se_nacl = pr_reg->pr_reg_nacl;
1015         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1016
1017         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1018                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1019                 se_nacl->initiatorname, i_buf);
1020 }
1021
1022 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1023                 char *page)
1024 {
1025         struct se_node_acl *se_nacl;
1026         ssize_t len;
1027
1028         se_nacl = dev->dev_reserved_node_acl;
1029         if (se_nacl) {
1030                 len = sprintf(page,
1031                               "SPC-2 Reservation: %s Initiator: %s\n",
1032                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1033                               se_nacl->initiatorname);
1034         } else {
1035                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1036         }
1037         return len;
1038 }
1039
1040 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1041                 char *page)
1042 {
1043         int ret;
1044
1045         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1046                 return sprintf(page, "Passthrough\n");
1047
1048         spin_lock(&dev->dev_reservation_lock);
1049         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1050                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1051         else
1052                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1053         spin_unlock(&dev->dev_reservation_lock);
1054         return ret;
1055 }
1056
1057 SE_DEV_PR_ATTR_RO(res_holder);
1058
1059 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1060                 struct se_device *dev, char *page)
1061 {
1062         ssize_t len = 0;
1063
1064         spin_lock(&dev->dev_reservation_lock);
1065         if (!dev->dev_pr_res_holder) {
1066                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1067         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1068                 len = sprintf(page, "SPC-3 Reservation: All Target"
1069                         " Ports registration\n");
1070         } else {
1071                 len = sprintf(page, "SPC-3 Reservation: Single"
1072                         " Target Port registration\n");
1073         }
1074
1075         spin_unlock(&dev->dev_reservation_lock);
1076         return len;
1077 }
1078
1079 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1080
1081 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1082                 struct se_device *dev, char *page)
1083 {
1084         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1085 }
1086
1087 SE_DEV_PR_ATTR_RO(res_pr_generation);
1088
1089 /*
1090  * res_pr_holder_tg_port
1091  */
1092 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1093                 struct se_device *dev, char *page)
1094 {
1095         struct se_node_acl *se_nacl;
1096         struct se_lun *lun;
1097         struct se_portal_group *se_tpg;
1098         struct t10_pr_registration *pr_reg;
1099         struct target_core_fabric_ops *tfo;
1100         ssize_t len = 0;
1101
1102         spin_lock(&dev->dev_reservation_lock);
1103         pr_reg = dev->dev_pr_res_holder;
1104         if (!pr_reg) {
1105                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1106                 goto out_unlock;
1107         }
1108
1109         se_nacl = pr_reg->pr_reg_nacl;
1110         se_tpg = se_nacl->se_tpg;
1111         lun = pr_reg->pr_reg_tg_pt_lun;
1112         tfo = se_tpg->se_tpg_tfo;
1113
1114         len += sprintf(page+len, "SPC-3 Reservation: %s"
1115                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1116                 tfo->tpg_get_wwn(se_tpg));
1117         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1118                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1119                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1120                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1121                 tfo->get_fabric_name(), lun->unpacked_lun);
1122
1123 out_unlock:
1124         spin_unlock(&dev->dev_reservation_lock);
1125         return len;
1126 }
1127
1128 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1129
1130 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1131                 struct se_device *dev, char *page)
1132 {
1133         struct target_core_fabric_ops *tfo;
1134         struct t10_pr_registration *pr_reg;
1135         unsigned char buf[384];
1136         char i_buf[PR_REG_ISID_ID_LEN];
1137         ssize_t len = 0;
1138         int reg_count = 0;
1139
1140         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1141
1142         spin_lock(&dev->t10_pr.registration_lock);
1143         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1144                         pr_reg_list) {
1145
1146                 memset(buf, 0, 384);
1147                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1148                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1149                 core_pr_dump_initiator_port(pr_reg, i_buf,
1150                                         PR_REG_ISID_ID_LEN);
1151                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1152                         tfo->get_fabric_name(),
1153                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1154                         pr_reg->pr_res_generation);
1155
1156                 if (len + strlen(buf) >= PAGE_SIZE)
1157                         break;
1158
1159                 len += sprintf(page+len, "%s", buf);
1160                 reg_count++;
1161         }
1162         spin_unlock(&dev->t10_pr.registration_lock);
1163
1164         if (!reg_count)
1165                 len += sprintf(page+len, "None\n");
1166
1167         return len;
1168 }
1169
1170 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1171
1172 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1173                 struct se_device *dev, char *page)
1174 {
1175         struct t10_pr_registration *pr_reg;
1176         ssize_t len = 0;
1177
1178         spin_lock(&dev->dev_reservation_lock);
1179         pr_reg = dev->dev_pr_res_holder;
1180         if (pr_reg) {
1181                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1182                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1183         } else {
1184                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1185         }
1186
1187         spin_unlock(&dev->dev_reservation_lock);
1188         return len;
1189 }
1190
1191 SE_DEV_PR_ATTR_RO(res_pr_type);
1192
1193 static ssize_t target_core_dev_pr_show_attr_res_type(
1194                 struct se_device *dev, char *page)
1195 {
1196         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1197                 return sprintf(page, "SPC_PASSTHROUGH\n");
1198         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1199                 return sprintf(page, "SPC2_RESERVATIONS\n");
1200         else
1201                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1202 }
1203
1204 SE_DEV_PR_ATTR_RO(res_type);
1205
1206 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1207                 struct se_device *dev, char *page)
1208 {
1209         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1210                 return 0;
1211
1212         return sprintf(page, "APTPL Bit Status: %s\n",
1213                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1214 }
1215
1216 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1217
1218 /*
1219  * res_aptpl_metadata
1220  */
1221 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1222                 struct se_device *dev, char *page)
1223 {
1224         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1225                 return 0;
1226
1227         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1228 }
1229
1230 enum {
1231         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1232         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1233         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1234         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1235 };
1236
1237 static match_table_t tokens = {
1238         {Opt_initiator_fabric, "initiator_fabric=%s"},
1239         {Opt_initiator_node, "initiator_node=%s"},
1240         {Opt_initiator_sid, "initiator_sid=%s"},
1241         {Opt_sa_res_key, "sa_res_key=%s"},
1242         {Opt_res_holder, "res_holder=%d"},
1243         {Opt_res_type, "res_type=%d"},
1244         {Opt_res_scope, "res_scope=%d"},
1245         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1246         {Opt_mapped_lun, "mapped_lun=%d"},
1247         {Opt_target_fabric, "target_fabric=%s"},
1248         {Opt_target_node, "target_node=%s"},
1249         {Opt_tpgt, "tpgt=%d"},
1250         {Opt_port_rtpi, "port_rtpi=%d"},
1251         {Opt_target_lun, "target_lun=%d"},
1252         {Opt_err, NULL}
1253 };
1254
1255 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1256         struct se_device *dev,
1257         const char *page,
1258         size_t count)
1259 {
1260         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1261         unsigned char *t_fabric = NULL, *t_port = NULL;
1262         char *orig, *ptr, *arg_p, *opts;
1263         substring_t args[MAX_OPT_ARGS];
1264         unsigned long long tmp_ll;
1265         u64 sa_res_key = 0;
1266         u32 mapped_lun = 0, target_lun = 0;
1267         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1268         u16 port_rpti = 0, tpgt = 0;
1269         u8 type = 0, scope;
1270
1271         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1272                 return 0;
1273         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1274                 return 0;
1275
1276         if (dev->export_count) {
1277                 pr_debug("Unable to process APTPL metadata while"
1278                         " active fabric exports exist\n");
1279                 return -EINVAL;
1280         }
1281
1282         opts = kstrdup(page, GFP_KERNEL);
1283         if (!opts)
1284                 return -ENOMEM;
1285
1286         orig = opts;
1287         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1288                 if (!*ptr)
1289                         continue;
1290
1291                 token = match_token(ptr, tokens, args);
1292                 switch (token) {
1293                 case Opt_initiator_fabric:
1294                         i_fabric = match_strdup(&args[0]);
1295                         if (!i_fabric) {
1296                                 ret = -ENOMEM;
1297                                 goto out;
1298                         }
1299                         break;
1300                 case Opt_initiator_node:
1301                         i_port = match_strdup(&args[0]);
1302                         if (!i_port) {
1303                                 ret = -ENOMEM;
1304                                 goto out;
1305                         }
1306                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1307                                 pr_err("APTPL metadata initiator_node="
1308                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1309                                         PR_APTPL_MAX_IPORT_LEN);
1310                                 ret = -EINVAL;
1311                                 break;
1312                         }
1313                         break;
1314                 case Opt_initiator_sid:
1315                         isid = match_strdup(&args[0]);
1316                         if (!isid) {
1317                                 ret = -ENOMEM;
1318                                 goto out;
1319                         }
1320                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1321                                 pr_err("APTPL metadata initiator_isid"
1322                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1323                                         PR_REG_ISID_LEN);
1324                                 ret = -EINVAL;
1325                                 break;
1326                         }
1327                         break;
1328                 case Opt_sa_res_key:
1329                         arg_p = match_strdup(&args[0]);
1330                         if (!arg_p) {
1331                                 ret = -ENOMEM;
1332                                 goto out;
1333                         }
1334                         ret = kstrtoull(arg_p, 0, &tmp_ll);
1335                         if (ret < 0) {
1336                                 pr_err("kstrtoull() failed for"
1337                                         " sa_res_key=\n");
1338                                 goto out;
1339                         }
1340                         sa_res_key = (u64)tmp_ll;
1341                         break;
1342                 /*
1343                  * PR APTPL Metadata for Reservation
1344                  */
1345                 case Opt_res_holder:
1346                         match_int(args, &arg);
1347                         res_holder = arg;
1348                         break;
1349                 case Opt_res_type:
1350                         match_int(args, &arg);
1351                         type = (u8)arg;
1352                         break;
1353                 case Opt_res_scope:
1354                         match_int(args, &arg);
1355                         scope = (u8)arg;
1356                         break;
1357                 case Opt_res_all_tg_pt:
1358                         match_int(args, &arg);
1359                         all_tg_pt = (int)arg;
1360                         break;
1361                 case Opt_mapped_lun:
1362                         match_int(args, &arg);
1363                         mapped_lun = (u32)arg;
1364                         break;
1365                 /*
1366                  * PR APTPL Metadata for Target Port
1367                  */
1368                 case Opt_target_fabric:
1369                         t_fabric = match_strdup(&args[0]);
1370                         if (!t_fabric) {
1371                                 ret = -ENOMEM;
1372                                 goto out;
1373                         }
1374                         break;
1375                 case Opt_target_node:
1376                         t_port = match_strdup(&args[0]);
1377                         if (!t_port) {
1378                                 ret = -ENOMEM;
1379                                 goto out;
1380                         }
1381                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1382                                 pr_err("APTPL metadata target_node="
1383                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1384                                         PR_APTPL_MAX_TPORT_LEN);
1385                                 ret = -EINVAL;
1386                                 break;
1387                         }
1388                         break;
1389                 case Opt_tpgt:
1390                         match_int(args, &arg);
1391                         tpgt = (u16)arg;
1392                         break;
1393                 case Opt_port_rtpi:
1394                         match_int(args, &arg);
1395                         port_rpti = (u16)arg;
1396                         break;
1397                 case Opt_target_lun:
1398                         match_int(args, &arg);
1399                         target_lun = (u32)arg;
1400                         break;
1401                 default:
1402                         break;
1403                 }
1404         }
1405
1406         if (!i_port || !t_port || !sa_res_key) {
1407                 pr_err("Illegal parameters for APTPL registration\n");
1408                 ret = -EINVAL;
1409                 goto out;
1410         }
1411
1412         if (res_holder && !(type)) {
1413                 pr_err("Illegal PR type: 0x%02x for reservation"
1414                                 " holder\n", type);
1415                 ret = -EINVAL;
1416                 goto out;
1417         }
1418
1419         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1420                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1421                         res_holder, all_tg_pt, type);
1422 out:
1423         kfree(i_fabric);
1424         kfree(i_port);
1425         kfree(isid);
1426         kfree(t_fabric);
1427         kfree(t_port);
1428         kfree(orig);
1429         return (ret == 0) ? count : ret;
1430 }
1431
1432 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1433
1434 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1435
1436 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1437         &target_core_dev_pr_res_holder.attr,
1438         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1439         &target_core_dev_pr_res_pr_generation.attr,
1440         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1441         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1442         &target_core_dev_pr_res_pr_type.attr,
1443         &target_core_dev_pr_res_type.attr,
1444         &target_core_dev_pr_res_aptpl_active.attr,
1445         &target_core_dev_pr_res_aptpl_metadata.attr,
1446         NULL,
1447 };
1448
1449 static struct configfs_item_operations target_core_dev_pr_ops = {
1450         .show_attribute         = target_core_dev_pr_attr_show,
1451         .store_attribute        = target_core_dev_pr_attr_store,
1452 };
1453
1454 static struct config_item_type target_core_dev_pr_cit = {
1455         .ct_item_ops            = &target_core_dev_pr_ops,
1456         .ct_attrs               = target_core_dev_pr_attrs,
1457         .ct_owner               = THIS_MODULE,
1458 };
1459
1460 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1461
1462 /*  Start functions for struct config_item_type target_core_dev_cit */
1463
1464 static ssize_t target_core_show_dev_info(void *p, char *page)
1465 {
1466         struct se_device *dev = p;
1467         struct se_subsystem_api *t = dev->transport;
1468         int bl = 0;
1469         ssize_t read_bytes = 0;
1470
1471         transport_dump_dev_state(dev, page, &bl);
1472         read_bytes += bl;
1473         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1474         return read_bytes;
1475 }
1476
1477 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1478         .attr   = { .ca_owner = THIS_MODULE,
1479                     .ca_name = "info",
1480                     .ca_mode = S_IRUGO },
1481         .show   = target_core_show_dev_info,
1482         .store  = NULL,
1483 };
1484
1485 static ssize_t target_core_store_dev_control(
1486         void *p,
1487         const char *page,
1488         size_t count)
1489 {
1490         struct se_device *dev = p;
1491         struct se_subsystem_api *t = dev->transport;
1492
1493         return t->set_configfs_dev_params(dev, page, count);
1494 }
1495
1496 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1497         .attr   = { .ca_owner = THIS_MODULE,
1498                     .ca_name = "control",
1499                     .ca_mode = S_IWUSR },
1500         .show   = NULL,
1501         .store  = target_core_store_dev_control,
1502 };
1503
1504 static ssize_t target_core_show_dev_alias(void *p, char *page)
1505 {
1506         struct se_device *dev = p;
1507
1508         if (!(dev->dev_flags & DF_USING_ALIAS))
1509                 return 0;
1510
1511         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1512 }
1513
1514 static ssize_t target_core_store_dev_alias(
1515         void *p,
1516         const char *page,
1517         size_t count)
1518 {
1519         struct se_device *dev = p;
1520         struct se_hba *hba = dev->se_hba;
1521         ssize_t read_bytes;
1522
1523         if (count > (SE_DEV_ALIAS_LEN-1)) {
1524                 pr_err("alias count: %d exceeds"
1525                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1526                         SE_DEV_ALIAS_LEN-1);
1527                 return -EINVAL;
1528         }
1529
1530         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1531         if (!read_bytes)
1532                 return -EINVAL;
1533         if (dev->dev_alias[read_bytes - 1] == '\n')
1534                 dev->dev_alias[read_bytes - 1] = '\0';
1535
1536         dev->dev_flags |= DF_USING_ALIAS;
1537
1538         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1539                 config_item_name(&hba->hba_group.cg_item),
1540                 config_item_name(&dev->dev_group.cg_item),
1541                 dev->dev_alias);
1542
1543         return read_bytes;
1544 }
1545
1546 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1547         .attr   = { .ca_owner = THIS_MODULE,
1548                     .ca_name = "alias",
1549                     .ca_mode =  S_IRUGO | S_IWUSR },
1550         .show   = target_core_show_dev_alias,
1551         .store  = target_core_store_dev_alias,
1552 };
1553
1554 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1555 {
1556         struct se_device *dev = p;
1557
1558         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1559                 return 0;
1560
1561         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1562 }
1563
1564 static ssize_t target_core_store_dev_udev_path(
1565         void *p,
1566         const char *page,
1567         size_t count)
1568 {
1569         struct se_device *dev = p;
1570         struct se_hba *hba = dev->se_hba;
1571         ssize_t read_bytes;
1572
1573         if (count > (SE_UDEV_PATH_LEN-1)) {
1574                 pr_err("udev_path count: %d exceeds"
1575                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1576                         SE_UDEV_PATH_LEN-1);
1577                 return -EINVAL;
1578         }
1579
1580         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1581                         "%s", page);
1582         if (!read_bytes)
1583                 return -EINVAL;
1584         if (dev->udev_path[read_bytes - 1] == '\n')
1585                 dev->udev_path[read_bytes - 1] = '\0';
1586
1587         dev->dev_flags |= DF_USING_UDEV_PATH;
1588
1589         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1590                 config_item_name(&hba->hba_group.cg_item),
1591                 config_item_name(&dev->dev_group.cg_item),
1592                 dev->udev_path);
1593
1594         return read_bytes;
1595 }
1596
1597 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1598         .attr   = { .ca_owner = THIS_MODULE,
1599                     .ca_name = "udev_path",
1600                     .ca_mode =  S_IRUGO | S_IWUSR },
1601         .show   = target_core_show_dev_udev_path,
1602         .store  = target_core_store_dev_udev_path,
1603 };
1604
1605 static ssize_t target_core_show_dev_enable(void *p, char *page)
1606 {
1607         struct se_device *dev = p;
1608
1609         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1610 }
1611
1612 static ssize_t target_core_store_dev_enable(
1613         void *p,
1614         const char *page,
1615         size_t count)
1616 {
1617         struct se_device *dev = p;
1618         char *ptr;
1619         int ret;
1620
1621         ptr = strstr(page, "1");
1622         if (!ptr) {
1623                 pr_err("For dev_enable ops, only valid value"
1624                                 " is \"1\"\n");
1625                 return -EINVAL;
1626         }
1627
1628         ret = target_configure_device(dev);
1629         if (ret)
1630                 return ret;
1631         return count;
1632 }
1633
1634 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1635         .attr   = { .ca_owner = THIS_MODULE,
1636                     .ca_name = "enable",
1637                     .ca_mode =  S_IRUGO | S_IWUSR },
1638         .show   = target_core_show_dev_enable,
1639         .store  = target_core_store_dev_enable,
1640 };
1641
1642 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1643 {
1644         struct se_device *dev = p;
1645         struct config_item *lu_ci;
1646         struct t10_alua_lu_gp *lu_gp;
1647         struct t10_alua_lu_gp_member *lu_gp_mem;
1648         ssize_t len = 0;
1649
1650         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1651         if (!lu_gp_mem)
1652                 return 0;
1653
1654         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1655         lu_gp = lu_gp_mem->lu_gp;
1656         if (lu_gp) {
1657                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1658                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1659                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1660         }
1661         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1662
1663         return len;
1664 }
1665
1666 static ssize_t target_core_store_alua_lu_gp(
1667         void *p,
1668         const char *page,
1669         size_t count)
1670 {
1671         struct se_device *dev = p;
1672         struct se_hba *hba = dev->se_hba;
1673         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1674         struct t10_alua_lu_gp_member *lu_gp_mem;
1675         unsigned char buf[LU_GROUP_NAME_BUF];
1676         int move = 0;
1677
1678         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1679         if (!lu_gp_mem)
1680                 return 0;
1681
1682         if (count > LU_GROUP_NAME_BUF) {
1683                 pr_err("ALUA LU Group Alias too large!\n");
1684                 return -EINVAL;
1685         }
1686         memset(buf, 0, LU_GROUP_NAME_BUF);
1687         memcpy(buf, page, count);
1688         /*
1689          * Any ALUA logical unit alias besides "NULL" means we will be
1690          * making a new group association.
1691          */
1692         if (strcmp(strstrip(buf), "NULL")) {
1693                 /*
1694                  * core_alua_get_lu_gp_by_name() will increment reference to
1695                  * struct t10_alua_lu_gp.  This reference is released with
1696                  * core_alua_get_lu_gp_by_name below().
1697                  */
1698                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1699                 if (!lu_gp_new)
1700                         return -ENODEV;
1701         }
1702
1703         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1704         lu_gp = lu_gp_mem->lu_gp;
1705         if (lu_gp) {
1706                 /*
1707                  * Clearing an existing lu_gp association, and replacing
1708                  * with NULL
1709                  */
1710                 if (!lu_gp_new) {
1711                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1712                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1713                                 " %hu\n",
1714                                 config_item_name(&hba->hba_group.cg_item),
1715                                 config_item_name(&dev->dev_group.cg_item),
1716                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1717                                 lu_gp->lu_gp_id);
1718
1719                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1720                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1721
1722                         return count;
1723                 }
1724                 /*
1725                  * Removing existing association of lu_gp_mem with lu_gp
1726                  */
1727                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1728                 move = 1;
1729         }
1730         /*
1731          * Associate lu_gp_mem with lu_gp_new.
1732          */
1733         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1734         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1735
1736         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1737                 " core/alua/lu_gps/%s, ID: %hu\n",
1738                 (move) ? "Moving" : "Adding",
1739                 config_item_name(&hba->hba_group.cg_item),
1740                 config_item_name(&dev->dev_group.cg_item),
1741                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1742                 lu_gp_new->lu_gp_id);
1743
1744         core_alua_put_lu_gp_from_name(lu_gp_new);
1745         return count;
1746 }
1747
1748 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1749         .attr   = { .ca_owner = THIS_MODULE,
1750                     .ca_name = "alua_lu_gp",
1751                     .ca_mode = S_IRUGO | S_IWUSR },
1752         .show   = target_core_show_alua_lu_gp,
1753         .store  = target_core_store_alua_lu_gp,
1754 };
1755
1756 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1757 {
1758         struct se_device *dev = p;
1759         struct t10_alua_lba_map *map;
1760         struct t10_alua_lba_map_member *mem;
1761         char *b = page;
1762         int bl = 0;
1763         char state;
1764
1765         spin_lock(&dev->t10_alua.lba_map_lock);
1766         if (!list_empty(&dev->t10_alua.lba_map_list))
1767             bl += sprintf(b + bl, "%u %u\n",
1768                           dev->t10_alua.lba_map_segment_size,
1769                           dev->t10_alua.lba_map_segment_multiplier);
1770         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1771                 bl += sprintf(b + bl, "%llu %llu",
1772                               map->lba_map_first_lba, map->lba_map_last_lba);
1773                 list_for_each_entry(mem, &map->lba_map_mem_list,
1774                                     lba_map_mem_list) {
1775                         switch (mem->lba_map_mem_alua_state) {
1776                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1777                                 state = 'O';
1778                                 break;
1779                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1780                                 state = 'A';
1781                                 break;
1782                         case ALUA_ACCESS_STATE_STANDBY:
1783                                 state = 'S';
1784                                 break;
1785                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1786                                 state = 'U';
1787                                 break;
1788                         default:
1789                                 state = '.';
1790                                 break;
1791                         }
1792                         bl += sprintf(b + bl, " %d:%c",
1793                                       mem->lba_map_mem_alua_pg_id, state);
1794                 }
1795                 bl += sprintf(b + bl, "\n");
1796         }
1797         spin_unlock(&dev->t10_alua.lba_map_lock);
1798         return bl;
1799 }
1800
1801 static ssize_t target_core_store_dev_lba_map(
1802         void *p,
1803         const char *page,
1804         size_t count)
1805 {
1806         struct se_device *dev = p;
1807         struct t10_alua_lba_map *lba_map = NULL;
1808         struct list_head lba_list;
1809         char *map_entries, *ptr;
1810         char state;
1811         int pg_num = -1, pg;
1812         int ret = 0, num = 0, pg_id, alua_state;
1813         unsigned long start_lba = -1, end_lba = -1;
1814         unsigned long segment_size = -1, segment_mult = -1;
1815
1816         map_entries = kstrdup(page, GFP_KERNEL);
1817         if (!map_entries)
1818                 return -ENOMEM;
1819
1820         INIT_LIST_HEAD(&lba_list);
1821         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1822                 if (!*ptr)
1823                         continue;
1824
1825                 if (num == 0) {
1826                         if (sscanf(ptr, "%lu %lu\n",
1827                                    &segment_size, &segment_mult) != 2) {
1828                                 pr_err("Invalid line %d\n", num);
1829                                 ret = -EINVAL;
1830                                 break;
1831                         }
1832                         num++;
1833                         continue;
1834                 }
1835                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1836                         pr_err("Invalid line %d\n", num);
1837                         ret = -EINVAL;
1838                         break;
1839                 }
1840                 ptr = strchr(ptr, ' ');
1841                 if (!ptr) {
1842                         pr_err("Invalid line %d, missing end lba\n", num);
1843                         ret = -EINVAL;
1844                         break;
1845                 }
1846                 ptr++;
1847                 ptr = strchr(ptr, ' ');
1848                 if (!ptr) {
1849                         pr_err("Invalid line %d, missing state definitions\n",
1850                                num);
1851                         ret = -EINVAL;
1852                         break;
1853                 }
1854                 ptr++;
1855                 lba_map = core_alua_allocate_lba_map(&lba_list,
1856                                                      start_lba, end_lba);
1857                 if (IS_ERR(lba_map)) {
1858                         ret = PTR_ERR(lba_map);
1859                         break;
1860                 }
1861                 pg = 0;
1862                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1863                         switch (state) {
1864                         case 'O':
1865                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1866                                 break;
1867                         case 'A':
1868                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1869                                 break;
1870                         case 'S':
1871                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1872                                 break;
1873                         case 'U':
1874                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1875                                 break;
1876                         default:
1877                                 pr_err("Invalid ALUA state '%c'\n", state);
1878                                 ret = -EINVAL;
1879                                 goto out;
1880                         }
1881
1882                         ret = core_alua_allocate_lba_map_mem(lba_map,
1883                                                              pg_id, alua_state);
1884                         if (ret) {
1885                                 pr_err("Invalid target descriptor %d:%c "
1886                                        "at line %d\n",
1887                                        pg_id, state, num);
1888                                 break;
1889                         }
1890                         pg++;
1891                         ptr = strchr(ptr, ' ');
1892                         if (ptr)
1893                                 ptr++;
1894                         else
1895                                 break;
1896                 }
1897                 if (pg_num == -1)
1898                     pg_num = pg;
1899                 else if (pg != pg_num) {
1900                         pr_err("Only %d from %d port groups definitions "
1901                                "at line %d\n", pg, pg_num, num);
1902                         ret = -EINVAL;
1903                         break;
1904                 }
1905                 num++;
1906         }
1907 out:
1908         if (ret) {
1909                 core_alua_free_lba_map(&lba_list);
1910                 count = ret;
1911         } else
1912                 core_alua_set_lba_map(dev, &lba_list,
1913                                       segment_size, segment_mult);
1914         kfree(map_entries);
1915         return count;
1916 }
1917
1918 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1919         .attr   = { .ca_owner = THIS_MODULE,
1920                     .ca_name = "lba_map",
1921                     .ca_mode = S_IRUGO | S_IWUSR },
1922         .show   = target_core_show_dev_lba_map,
1923         .store  = target_core_store_dev_lba_map,
1924 };
1925
1926 static struct configfs_attribute *lio_core_dev_attrs[] = {
1927         &target_core_attr_dev_info.attr,
1928         &target_core_attr_dev_control.attr,
1929         &target_core_attr_dev_alias.attr,
1930         &target_core_attr_dev_udev_path.attr,
1931         &target_core_attr_dev_enable.attr,
1932         &target_core_attr_dev_alua_lu_gp.attr,
1933         &target_core_attr_dev_lba_map.attr,
1934         NULL,
1935 };
1936
1937 static void target_core_dev_release(struct config_item *item)
1938 {
1939         struct config_group *dev_cg = to_config_group(item);
1940         struct se_device *dev =
1941                 container_of(dev_cg, struct se_device, dev_group);
1942
1943         kfree(dev_cg->default_groups);
1944         target_free_device(dev);
1945 }
1946
1947 static ssize_t target_core_dev_show(struct config_item *item,
1948                                      struct configfs_attribute *attr,
1949                                      char *page)
1950 {
1951         struct config_group *dev_cg = to_config_group(item);
1952         struct se_device *dev =
1953                 container_of(dev_cg, struct se_device, dev_group);
1954         struct target_core_configfs_attribute *tc_attr = container_of(
1955                         attr, struct target_core_configfs_attribute, attr);
1956
1957         if (!tc_attr->show)
1958                 return -EINVAL;
1959
1960         return tc_attr->show(dev, page);
1961 }
1962
1963 static ssize_t target_core_dev_store(struct config_item *item,
1964                                       struct configfs_attribute *attr,
1965                                       const char *page, size_t count)
1966 {
1967         struct config_group *dev_cg = to_config_group(item);
1968         struct se_device *dev =
1969                 container_of(dev_cg, struct se_device, dev_group);
1970         struct target_core_configfs_attribute *tc_attr = container_of(
1971                         attr, struct target_core_configfs_attribute, attr);
1972
1973         if (!tc_attr->store)
1974                 return -EINVAL;
1975
1976         return tc_attr->store(dev, page, count);
1977 }
1978
1979 static struct configfs_item_operations target_core_dev_item_ops = {
1980         .release                = target_core_dev_release,
1981         .show_attribute         = target_core_dev_show,
1982         .store_attribute        = target_core_dev_store,
1983 };
1984
1985 static struct config_item_type target_core_dev_cit = {
1986         .ct_item_ops            = &target_core_dev_item_ops,
1987         .ct_attrs               = lio_core_dev_attrs,
1988         .ct_owner               = THIS_MODULE,
1989 };
1990
1991 /* End functions for struct config_item_type target_core_dev_cit */
1992
1993 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1994
1995 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1996 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1997 static struct target_core_alua_lu_gp_attribute                          \
1998                         target_core_alua_lu_gp_##_name =                \
1999         __CONFIGFS_EATTR(_name, _mode,                                  \
2000         target_core_alua_lu_gp_show_attr_##_name,                       \
2001         target_core_alua_lu_gp_store_attr_##_name);
2002
2003 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2004 static struct target_core_alua_lu_gp_attribute                          \
2005                         target_core_alua_lu_gp_##_name =                \
2006         __CONFIGFS_EATTR_RO(_name,                                      \
2007         target_core_alua_lu_gp_show_attr_##_name);
2008
2009 /*
2010  * lu_gp_id
2011  */
2012 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2013         struct t10_alua_lu_gp *lu_gp,
2014         char *page)
2015 {
2016         if (!lu_gp->lu_gp_valid_id)
2017                 return 0;
2018
2019         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2020 }
2021
2022 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2023         struct t10_alua_lu_gp *lu_gp,
2024         const char *page,
2025         size_t count)
2026 {
2027         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2028         unsigned long lu_gp_id;
2029         int ret;
2030
2031         ret = kstrtoul(page, 0, &lu_gp_id);
2032         if (ret < 0) {
2033                 pr_err("kstrtoul() returned %d for"
2034                         " lu_gp_id\n", ret);
2035                 return ret;
2036         }
2037         if (lu_gp_id > 0x0000ffff) {
2038                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2039                         " 0x0000ffff\n", lu_gp_id);
2040                 return -EINVAL;
2041         }
2042
2043         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2044         if (ret < 0)
2045                 return -EINVAL;
2046
2047         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2048                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2049                 config_item_name(&alua_lu_gp_cg->cg_item),
2050                 lu_gp->lu_gp_id);
2051
2052         return count;
2053 }
2054
2055 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2056
2057 /*
2058  * members
2059  */
2060 static ssize_t target_core_alua_lu_gp_show_attr_members(
2061         struct t10_alua_lu_gp *lu_gp,
2062         char *page)
2063 {
2064         struct se_device *dev;
2065         struct se_hba *hba;
2066         struct t10_alua_lu_gp_member *lu_gp_mem;
2067         ssize_t len = 0, cur_len;
2068         unsigned char buf[LU_GROUP_NAME_BUF];
2069
2070         memset(buf, 0, LU_GROUP_NAME_BUF);
2071
2072         spin_lock(&lu_gp->lu_gp_lock);
2073         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2074                 dev = lu_gp_mem->lu_gp_mem_dev;
2075                 hba = dev->se_hba;
2076
2077                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2078                         config_item_name(&hba->hba_group.cg_item),
2079                         config_item_name(&dev->dev_group.cg_item));
2080                 cur_len++; /* Extra byte for NULL terminator */
2081
2082                 if ((cur_len + len) > PAGE_SIZE) {
2083                         pr_warn("Ran out of lu_gp_show_attr"
2084                                 "_members buffer\n");
2085                         break;
2086                 }
2087                 memcpy(page+len, buf, cur_len);
2088                 len += cur_len;
2089         }
2090         spin_unlock(&lu_gp->lu_gp_lock);
2091
2092         return len;
2093 }
2094
2095 SE_DEV_ALUA_LU_ATTR_RO(members);
2096
2097 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2098
2099 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2100         &target_core_alua_lu_gp_lu_gp_id.attr,
2101         &target_core_alua_lu_gp_members.attr,
2102         NULL,
2103 };
2104
2105 static void target_core_alua_lu_gp_release(struct config_item *item)
2106 {
2107         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2108                         struct t10_alua_lu_gp, lu_gp_group);
2109
2110         core_alua_free_lu_gp(lu_gp);
2111 }
2112
2113 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2114         .release                = target_core_alua_lu_gp_release,
2115         .show_attribute         = target_core_alua_lu_gp_attr_show,
2116         .store_attribute        = target_core_alua_lu_gp_attr_store,
2117 };
2118
2119 static struct config_item_type target_core_alua_lu_gp_cit = {
2120         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2121         .ct_attrs               = target_core_alua_lu_gp_attrs,
2122         .ct_owner               = THIS_MODULE,
2123 };
2124
2125 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2126
2127 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2128
2129 static struct config_group *target_core_alua_create_lu_gp(
2130         struct config_group *group,
2131         const char *name)
2132 {
2133         struct t10_alua_lu_gp *lu_gp;
2134         struct config_group *alua_lu_gp_cg = NULL;
2135         struct config_item *alua_lu_gp_ci = NULL;
2136
2137         lu_gp = core_alua_allocate_lu_gp(name, 0);
2138         if (IS_ERR(lu_gp))
2139                 return NULL;
2140
2141         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2142         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2143
2144         config_group_init_type_name(alua_lu_gp_cg, name,
2145                         &target_core_alua_lu_gp_cit);
2146
2147         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2148                 " Group: core/alua/lu_gps/%s\n",
2149                 config_item_name(alua_lu_gp_ci));
2150
2151         return alua_lu_gp_cg;
2152
2153 }
2154
2155 static void target_core_alua_drop_lu_gp(
2156         struct config_group *group,
2157         struct config_item *item)
2158 {
2159         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2160                         struct t10_alua_lu_gp, lu_gp_group);
2161
2162         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2163                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2164                 config_item_name(item), lu_gp->lu_gp_id);
2165         /*
2166          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2167          * -> target_core_alua_lu_gp_release()
2168          */
2169         config_item_put(item);
2170 }
2171
2172 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2173         .make_group             = &target_core_alua_create_lu_gp,
2174         .drop_item              = &target_core_alua_drop_lu_gp,
2175 };
2176
2177 static struct config_item_type target_core_alua_lu_gps_cit = {
2178         .ct_item_ops            = NULL,
2179         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2180         .ct_owner               = THIS_MODULE,
2181 };
2182
2183 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2184
2185 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2186
2187 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2188 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2189 static struct target_core_alua_tg_pt_gp_attribute                       \
2190                         target_core_alua_tg_pt_gp_##_name =             \
2191         __CONFIGFS_EATTR(_name, _mode,                                  \
2192         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2193         target_core_alua_tg_pt_gp_store_attr_##_name);
2194
2195 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2196 static struct target_core_alua_tg_pt_gp_attribute                       \
2197                         target_core_alua_tg_pt_gp_##_name =             \
2198         __CONFIGFS_EATTR_RO(_name,                                      \
2199         target_core_alua_tg_pt_gp_show_attr_##_name);
2200
2201 /*
2202  * alua_access_state
2203  */
2204 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2205         struct t10_alua_tg_pt_gp *tg_pt_gp,
2206         char *page)
2207 {
2208         return sprintf(page, "%d\n",
2209                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2210 }
2211
2212 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2213         struct t10_alua_tg_pt_gp *tg_pt_gp,
2214         const char *page,
2215         size_t count)
2216 {
2217         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2218         unsigned long tmp;
2219         int new_state, ret;
2220
2221         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2222                 pr_err("Unable to do implicit ALUA on non valid"
2223                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2224                 return -EINVAL;
2225         }
2226
2227         ret = kstrtoul(page, 0, &tmp);
2228         if (ret < 0) {
2229                 pr_err("Unable to extract new ALUA access state from"
2230                                 " %s\n", page);
2231                 return ret;
2232         }
2233         new_state = (int)tmp;
2234
2235         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2236                 pr_err("Unable to process implicit configfs ALUA"
2237                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2238                 return -EINVAL;
2239         }
2240         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2241             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2242                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2243                 pr_err("Unable to process implicit configfs ALUA transition"
2244                        " while explicit ALUA management is enabled\n");
2245                 return -EINVAL;
2246         }
2247
2248         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2249                                         NULL, NULL, new_state, 0);
2250         return (!ret) ? count : -EINVAL;
2251 }
2252
2253 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2254
2255 /*
2256  * alua_access_status
2257  */
2258 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2259         struct t10_alua_tg_pt_gp *tg_pt_gp,
2260         char *page)
2261 {
2262         return sprintf(page, "%s\n",
2263                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2264 }
2265
2266 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2267         struct t10_alua_tg_pt_gp *tg_pt_gp,
2268         const char *page,
2269         size_t count)
2270 {
2271         unsigned long tmp;
2272         int new_status, ret;
2273
2274         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2275                 pr_err("Unable to do set ALUA access status on non"
2276                         " valid tg_pt_gp ID: %hu\n",
2277                         tg_pt_gp->tg_pt_gp_valid_id);
2278                 return -EINVAL;
2279         }
2280
2281         ret = kstrtoul(page, 0, &tmp);
2282         if (ret < 0) {
2283                 pr_err("Unable to extract new ALUA access status"
2284                                 " from %s\n", page);
2285                 return ret;
2286         }
2287         new_status = (int)tmp;
2288
2289         if ((new_status != ALUA_STATUS_NONE) &&
2290             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2291             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2292                 pr_err("Illegal ALUA access status: 0x%02x\n",
2293                                 new_status);
2294                 return -EINVAL;
2295         }
2296
2297         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2298         return count;
2299 }
2300
2301 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2302
2303 /*
2304  * alua_access_type
2305  */
2306 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2307         struct t10_alua_tg_pt_gp *tg_pt_gp,
2308         char *page)
2309 {
2310         return core_alua_show_access_type(tg_pt_gp, page);
2311 }
2312
2313 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2314         struct t10_alua_tg_pt_gp *tg_pt_gp,
2315         const char *page,
2316         size_t count)
2317 {
2318         return core_alua_store_access_type(tg_pt_gp, page, count);
2319 }
2320
2321 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2322
2323 /*
2324  * alua_supported_states
2325  */
2326
2327 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2328 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2329         struct t10_alua_tg_pt_gp *t, char *p)                           \
2330 {                                                                       \
2331         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2332 }
2333
2334 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2335 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2336         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2337 {                                                                       \
2338         unsigned long tmp;                                              \
2339         int ret;                                                        \
2340                                                                         \
2341         if (!t->tg_pt_gp_valid_id) {                                    \
2342                 pr_err("Unable to do set ##_name ALUA state on non"     \
2343                        " valid tg_pt_gp ID: %hu\n",                     \
2344                        t->tg_pt_gp_valid_id);                           \
2345                 return -EINVAL;                                         \
2346         }                                                               \
2347                                                                         \
2348         ret = kstrtoul(p, 0, &tmp);                                     \
2349         if (ret < 0) {                                                  \
2350                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2351                 return -EINVAL;                                         \
2352         }                                                               \
2353         if (tmp > 1) {                                                  \
2354                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2355                 return -EINVAL;                                         \
2356         }                                                               \
2357         if (!tmp)                                                       \
2358                 t->_var |= _bit;                                        \
2359         else                                                            \
2360                 t->_var &= ~_bit;                                       \
2361                                                                         \
2362         return c;                                                       \
2363 }
2364
2365 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2366                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2367 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2368                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2369 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2370
2371 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2372                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2373 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2374                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2375 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2376
2377 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2378                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2379 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2380                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2381 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2382
2383 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2384                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2385 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2386                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2387 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2388
2389 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2390                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2391 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2392                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2393 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2394
2395 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2396                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2397 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2398                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2399 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2400
2401 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2402                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2403 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2404                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2405 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2406
2407 /*
2408  * alua_write_metadata
2409  */
2410 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2411         struct t10_alua_tg_pt_gp *tg_pt_gp,
2412         char *page)
2413 {
2414         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2415 }
2416
2417 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2418         struct t10_alua_tg_pt_gp *tg_pt_gp,
2419         const char *page,
2420         size_t count)
2421 {
2422         unsigned long tmp;
2423         int ret;
2424
2425         ret = kstrtoul(page, 0, &tmp);
2426         if (ret < 0) {
2427                 pr_err("Unable to extract alua_write_metadata\n");
2428                 return ret;
2429         }
2430
2431         if ((tmp != 0) && (tmp != 1)) {
2432                 pr_err("Illegal value for alua_write_metadata:"
2433                         " %lu\n", tmp);
2434                 return -EINVAL;
2435         }
2436         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2437
2438         return count;
2439 }
2440
2441 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2442
2443
2444
2445 /*
2446  * nonop_delay_msecs
2447  */
2448 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2449         struct t10_alua_tg_pt_gp *tg_pt_gp,
2450         char *page)
2451 {
2452         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2453
2454 }
2455
2456 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2457         struct t10_alua_tg_pt_gp *tg_pt_gp,
2458         const char *page,
2459         size_t count)
2460 {
2461         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2462 }
2463
2464 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2465
2466 /*
2467  * trans_delay_msecs
2468  */
2469 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2470         struct t10_alua_tg_pt_gp *tg_pt_gp,
2471         char *page)
2472 {
2473         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2474 }
2475
2476 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2477         struct t10_alua_tg_pt_gp *tg_pt_gp,
2478         const char *page,
2479         size_t count)
2480 {
2481         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2482 }
2483
2484 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2485
2486 /*
2487  * implicit_trans_secs
2488  */
2489 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2490         struct t10_alua_tg_pt_gp *tg_pt_gp,
2491         char *page)
2492 {
2493         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2494 }
2495
2496 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2497         struct t10_alua_tg_pt_gp *tg_pt_gp,
2498         const char *page,
2499         size_t count)
2500 {
2501         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2502 }
2503
2504 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2505
2506 /*
2507  * preferred
2508  */
2509
2510 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2511         struct t10_alua_tg_pt_gp *tg_pt_gp,
2512         char *page)
2513 {
2514         return core_alua_show_preferred_bit(tg_pt_gp, page);
2515 }
2516
2517 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2518         struct t10_alua_tg_pt_gp *tg_pt_gp,
2519         const char *page,
2520         size_t count)
2521 {
2522         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2523 }
2524
2525 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2526
2527 /*
2528  * tg_pt_gp_id
2529  */
2530 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2531         struct t10_alua_tg_pt_gp *tg_pt_gp,
2532         char *page)
2533 {
2534         if (!tg_pt_gp->tg_pt_gp_valid_id)
2535                 return 0;
2536
2537         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2538 }
2539
2540 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2541         struct t10_alua_tg_pt_gp *tg_pt_gp,
2542         const char *page,
2543         size_t count)
2544 {
2545         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2546         unsigned long tg_pt_gp_id;
2547         int ret;
2548
2549         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2550         if (ret < 0) {
2551                 pr_err("kstrtoul() returned %d for"
2552                         " tg_pt_gp_id\n", ret);
2553                 return ret;
2554         }
2555         if (tg_pt_gp_id > 0x0000ffff) {
2556                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2557                         " 0x0000ffff\n", tg_pt_gp_id);
2558                 return -EINVAL;
2559         }
2560
2561         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2562         if (ret < 0)
2563                 return -EINVAL;
2564
2565         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2566                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2567                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2568                 tg_pt_gp->tg_pt_gp_id);
2569
2570         return count;
2571 }
2572
2573 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2574
2575 /*
2576  * members
2577  */
2578 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2579         struct t10_alua_tg_pt_gp *tg_pt_gp,
2580         char *page)
2581 {
2582         struct se_port *port;
2583         struct se_portal_group *tpg;
2584         struct se_lun *lun;
2585         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2586         ssize_t len = 0, cur_len;
2587         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2588
2589         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2590
2591         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2592         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2593                         tg_pt_gp_mem_list) {
2594                 port = tg_pt_gp_mem->tg_pt;
2595                 tpg = port->sep_tpg;
2596                 lun = port->sep_lun;
2597
2598                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2599                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2600                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2601                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2602                         config_item_name(&lun->lun_group.cg_item));
2603                 cur_len++; /* Extra byte for NULL terminator */
2604
2605                 if ((cur_len + len) > PAGE_SIZE) {
2606                         pr_warn("Ran out of lu_gp_show_attr"
2607                                 "_members buffer\n");
2608                         break;
2609                 }
2610                 memcpy(page+len, buf, cur_len);
2611                 len += cur_len;
2612         }
2613         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2614
2615         return len;
2616 }
2617
2618 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2619
2620 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2621                         tg_pt_gp_group);
2622
2623 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2624         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2625         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2626         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2627         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2628         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2629         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2630         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2631         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2632         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2633         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2634         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2635         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2636         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2637         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2638         &target_core_alua_tg_pt_gp_preferred.attr,
2639         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2640         &target_core_alua_tg_pt_gp_members.attr,
2641         NULL,
2642 };
2643
2644 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2645 {
2646         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2647                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2648
2649         core_alua_free_tg_pt_gp(tg_pt_gp);
2650 }
2651
2652 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2653         .release                = target_core_alua_tg_pt_gp_release,
2654         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2655         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2656 };
2657
2658 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2659         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2660         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2661         .ct_owner               = THIS_MODULE,
2662 };
2663
2664 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2665
2666 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2667
2668 static struct config_group *target_core_alua_create_tg_pt_gp(
2669         struct config_group *group,
2670         const char *name)
2671 {
2672         struct t10_alua *alua = container_of(group, struct t10_alua,
2673                                         alua_tg_pt_gps_group);
2674         struct t10_alua_tg_pt_gp *tg_pt_gp;
2675         struct config_group *alua_tg_pt_gp_cg = NULL;
2676         struct config_item *alua_tg_pt_gp_ci = NULL;
2677
2678         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2679         if (!tg_pt_gp)
2680                 return NULL;
2681
2682         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2683         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2684
2685         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2686                         &target_core_alua_tg_pt_gp_cit);
2687
2688         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2689                 " Group: alua/tg_pt_gps/%s\n",
2690                 config_item_name(alua_tg_pt_gp_ci));
2691
2692         return alua_tg_pt_gp_cg;
2693 }
2694
2695 static void target_core_alua_drop_tg_pt_gp(
2696         struct config_group *group,
2697         struct config_item *item)
2698 {
2699         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2700                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2701
2702         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2703                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2704                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2705         /*
2706          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2707          * -> target_core_alua_tg_pt_gp_release().
2708          */
2709         config_item_put(item);
2710 }
2711
2712 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2713         .make_group             = &target_core_alua_create_tg_pt_gp,
2714         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2715 };
2716
2717 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2718         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2719         .ct_owner               = THIS_MODULE,
2720 };
2721
2722 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2723
2724 /* Start functions for struct config_item_type target_core_alua_cit */
2725
2726 /*
2727  * target_core_alua_cit is a ConfigFS group that lives under
2728  * /sys/kernel/config/target/core/alua.  There are default groups
2729  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2730  * target_core_alua_cit in target_core_init_configfs() below.
2731  */
2732 static struct config_item_type target_core_alua_cit = {
2733         .ct_item_ops            = NULL,
2734         .ct_attrs               = NULL,
2735         .ct_owner               = THIS_MODULE,
2736 };
2737
2738 /* End functions for struct config_item_type target_core_alua_cit */
2739
2740 /* Start functions for struct config_item_type target_core_stat_cit */
2741
2742 static struct config_group *target_core_stat_mkdir(
2743         struct config_group *group,
2744         const char *name)
2745 {
2746         return ERR_PTR(-ENOSYS);
2747 }
2748
2749 static void target_core_stat_rmdir(
2750         struct config_group *group,
2751         struct config_item *item)
2752 {
2753         return;
2754 }
2755
2756 static struct configfs_group_operations target_core_stat_group_ops = {
2757         .make_group             = &target_core_stat_mkdir,
2758         .drop_item              = &target_core_stat_rmdir,
2759 };
2760
2761 static struct config_item_type target_core_stat_cit = {
2762         .ct_group_ops           = &target_core_stat_group_ops,
2763         .ct_owner               = THIS_MODULE,
2764 };
2765
2766 /* End functions for struct config_item_type target_core_stat_cit */
2767
2768 /* Start functions for struct config_item_type target_core_hba_cit */
2769
2770 static struct config_group *target_core_make_subdev(
2771         struct config_group *group,
2772         const char *name)
2773 {
2774         struct t10_alua_tg_pt_gp *tg_pt_gp;
2775         struct se_subsystem_api *t;
2776         struct config_item *hba_ci = &group->cg_item;
2777         struct se_hba *hba = item_to_hba(hba_ci);
2778         struct se_device *dev;
2779         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2780         struct config_group *dev_stat_grp = NULL;
2781         int errno = -ENOMEM, ret;
2782
2783         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2784         if (ret)
2785                 return ERR_PTR(ret);
2786         /*
2787          * Locate the struct se_subsystem_api from parent's struct se_hba.
2788          */
2789         t = hba->transport;
2790
2791         dev = target_alloc_device(hba, name);
2792         if (!dev)
2793                 goto out_unlock;
2794
2795         dev_cg = &dev->dev_group;
2796
2797         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2798                         GFP_KERNEL);
2799         if (!dev_cg->default_groups)
2800                 goto out_free_device;
2801
2802         config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2803         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2804                         &target_core_dev_attrib_cit);
2805         config_group_init_type_name(&dev->dev_pr_group, "pr",
2806                         &target_core_dev_pr_cit);
2807         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2808                         &target_core_dev_wwn_cit);
2809         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2810                         "alua", &target_core_alua_tg_pt_gps_cit);
2811         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2812                         "statistics", &target_core_stat_cit);
2813
2814         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2815         dev_cg->default_groups[1] = &dev->dev_pr_group;
2816         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2817         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2818         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2819         dev_cg->default_groups[5] = NULL;
2820         /*
2821          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2822          */
2823         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2824         if (!tg_pt_gp)
2825                 goto out_free_dev_cg_default_groups;
2826         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2827
2828         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2829         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2830                                 GFP_KERNEL);
2831         if (!tg_pt_gp_cg->default_groups) {
2832                 pr_err("Unable to allocate tg_pt_gp_cg->"
2833                                 "default_groups\n");
2834                 goto out_free_tg_pt_gp;
2835         }
2836
2837         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2838                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2839         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2840         tg_pt_gp_cg->default_groups[1] = NULL;
2841         /*
2842          * Add core/$HBA/$DEV/statistics/ default groups
2843          */
2844         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2845         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2846                                 GFP_KERNEL);
2847         if (!dev_stat_grp->default_groups) {
2848                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2849                 goto out_free_tg_pt_gp_cg_default_groups;
2850         }
2851         target_stat_setup_dev_default_groups(dev);
2852
2853         mutex_unlock(&hba->hba_access_mutex);
2854         return dev_cg;
2855
2856 out_free_tg_pt_gp_cg_default_groups:
2857         kfree(tg_pt_gp_cg->default_groups);
2858 out_free_tg_pt_gp:
2859         core_alua_free_tg_pt_gp(tg_pt_gp);
2860 out_free_dev_cg_default_groups:
2861         kfree(dev_cg->default_groups);
2862 out_free_device:
2863         target_free_device(dev);
2864 out_unlock:
2865         mutex_unlock(&hba->hba_access_mutex);
2866         return ERR_PTR(errno);
2867 }
2868
2869 static void target_core_drop_subdev(
2870         struct config_group *group,
2871         struct config_item *item)
2872 {
2873         struct config_group *dev_cg = to_config_group(item);
2874         struct se_device *dev =
2875                 container_of(dev_cg, struct se_device, dev_group);
2876         struct se_hba *hba;
2877         struct config_item *df_item;
2878         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2879         int i;
2880
2881         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2882
2883         mutex_lock(&hba->hba_access_mutex);
2884
2885         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2886         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2887                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2888                 dev_stat_grp->default_groups[i] = NULL;
2889                 config_item_put(df_item);
2890         }
2891         kfree(dev_stat_grp->default_groups);
2892
2893         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2894         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2895                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2896                 tg_pt_gp_cg->default_groups[i] = NULL;
2897                 config_item_put(df_item);
2898         }
2899         kfree(tg_pt_gp_cg->default_groups);
2900         /*
2901          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2902          * directly from target_core_alua_tg_pt_gp_release().
2903          */
2904         dev->t10_alua.default_tg_pt_gp = NULL;
2905
2906         for (i = 0; dev_cg->default_groups[i]; i++) {
2907                 df_item = &dev_cg->default_groups[i]->cg_item;
2908                 dev_cg->default_groups[i] = NULL;
2909                 config_item_put(df_item);
2910         }
2911         /*
2912          * se_dev is released from target_core_dev_item_ops->release()
2913          */
2914         config_item_put(item);
2915         mutex_unlock(&hba->hba_access_mutex);
2916 }
2917
2918 static struct configfs_group_operations target_core_hba_group_ops = {
2919         .make_group             = target_core_make_subdev,
2920         .drop_item              = target_core_drop_subdev,
2921 };
2922
2923 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2924 #define SE_HBA_ATTR(_name, _mode)                               \
2925 static struct target_core_hba_attribute                         \
2926                 target_core_hba_##_name =                       \
2927                 __CONFIGFS_EATTR(_name, _mode,                  \
2928                 target_core_hba_show_attr_##_name,              \
2929                 target_core_hba_store_attr_##_name);
2930
2931 #define SE_HBA_ATTR_RO(_name)                                   \
2932 static struct target_core_hba_attribute                         \
2933                 target_core_hba_##_name =                       \
2934                 __CONFIGFS_EATTR_RO(_name,                      \
2935                 target_core_hba_show_attr_##_name);
2936
2937 static ssize_t target_core_hba_show_attr_hba_info(
2938         struct se_hba *hba,
2939         char *page)
2940 {
2941         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2942                         hba->hba_id, hba->transport->name,
2943                         TARGET_CORE_CONFIGFS_VERSION);
2944 }
2945
2946 SE_HBA_ATTR_RO(hba_info);
2947
2948 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2949                                 char *page)
2950 {
2951         int hba_mode = 0;
2952
2953         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2954                 hba_mode = 1;
2955
2956         return sprintf(page, "%d\n", hba_mode);
2957 }
2958
2959 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2960                                 const char *page, size_t count)
2961 {
2962         struct se_subsystem_api *transport = hba->transport;
2963         unsigned long mode_flag;
2964         int ret;
2965
2966         if (transport->pmode_enable_hba == NULL)
2967                 return -EINVAL;
2968
2969         ret = kstrtoul(page, 0, &mode_flag);
2970         if (ret < 0) {
2971                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2972                 return ret;
2973         }
2974
2975         if (hba->dev_count) {
2976                 pr_err("Unable to set hba_mode with active devices\n");
2977                 return -EINVAL;
2978         }
2979
2980         ret = transport->pmode_enable_hba(hba, mode_flag);
2981         if (ret < 0)
2982                 return -EINVAL;
2983         if (ret > 0)
2984                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2985         else if (ret == 0)
2986                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2987
2988         return count;
2989 }
2990
2991 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2992
2993 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2994
2995 static void target_core_hba_release(struct config_item *item)
2996 {
2997         struct se_hba *hba = container_of(to_config_group(item),
2998                                 struct se_hba, hba_group);
2999         core_delete_hba(hba);
3000 }
3001
3002 static struct configfs_attribute *target_core_hba_attrs[] = {
3003         &target_core_hba_hba_info.attr,
3004         &target_core_hba_hba_mode.attr,
3005         NULL,
3006 };
3007
3008 static struct configfs_item_operations target_core_hba_item_ops = {
3009         .release                = target_core_hba_release,
3010         .show_attribute         = target_core_hba_attr_show,
3011         .store_attribute        = target_core_hba_attr_store,
3012 };
3013
3014 static struct config_item_type target_core_hba_cit = {
3015         .ct_item_ops            = &target_core_hba_item_ops,
3016         .ct_group_ops           = &target_core_hba_group_ops,
3017         .ct_attrs               = target_core_hba_attrs,
3018         .ct_owner               = THIS_MODULE,
3019 };
3020
3021 static struct config_group *target_core_call_addhbatotarget(
3022         struct config_group *group,
3023         const char *name)
3024 {
3025         char *se_plugin_str, *str, *str2;
3026         struct se_hba *hba;
3027         char buf[TARGET_CORE_NAME_MAX_LEN];
3028         unsigned long plugin_dep_id = 0;
3029         int ret;
3030
3031         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3032         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3033                 pr_err("Passed *name strlen(): %d exceeds"
3034                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3035                         TARGET_CORE_NAME_MAX_LEN);
3036                 return ERR_PTR(-ENAMETOOLONG);
3037         }
3038         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3039
3040         str = strstr(buf, "_");
3041         if (!str) {
3042                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3043                 return ERR_PTR(-EINVAL);
3044         }
3045         se_plugin_str = buf;
3046         /*
3047          * Special case for subsystem plugins that have "_" in their names.
3048          * Namely rd_direct and rd_mcp..
3049          */
3050         str2 = strstr(str+1, "_");
3051         if (str2) {
3052                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3053                 str2++; /* Skip to start of plugin dependent ID */
3054                 str = str2;
3055         } else {
3056                 *str = '\0'; /* Terminate for *se_plugin_str */
3057                 str++; /* Skip to start of plugin dependent ID */
3058         }
3059
3060         ret = kstrtoul(str, 0, &plugin_dep_id);
3061         if (ret < 0) {
3062                 pr_err("kstrtoul() returned %d for"
3063                                 " plugin_dep_id\n", ret);
3064                 return ERR_PTR(ret);
3065         }
3066         /*
3067          * Load up TCM subsystem plugins if they have not already been loaded.
3068          */
3069         transport_subsystem_check_init();
3070
3071         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3072         if (IS_ERR(hba))
3073                 return ERR_CAST(hba);
3074
3075         config_group_init_type_name(&hba->hba_group, name,
3076                         &target_core_hba_cit);
3077
3078         return &hba->hba_group;
3079 }
3080
3081 static void target_core_call_delhbafromtarget(
3082         struct config_group *group,
3083         struct config_item *item)
3084 {
3085         /*
3086          * core_delete_hba() is called from target_core_hba_item_ops->release()
3087          * -> target_core_hba_release()
3088          */
3089         config_item_put(item);
3090 }
3091
3092 static struct configfs_group_operations target_core_group_ops = {
3093         .make_group     = target_core_call_addhbatotarget,
3094         .drop_item      = target_core_call_delhbafromtarget,
3095 };
3096
3097 static struct config_item_type target_core_cit = {
3098         .ct_item_ops    = NULL,
3099         .ct_group_ops   = &target_core_group_ops,
3100         .ct_attrs       = NULL,
3101         .ct_owner       = THIS_MODULE,
3102 };
3103
3104 /* Stop functions for struct config_item_type target_core_hba_cit */
3105
3106 static int __init target_core_init_configfs(void)
3107 {
3108         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3109         struct config_group *lu_gp_cg = NULL;
3110         struct configfs_subsystem *subsys;
3111         struct t10_alua_lu_gp *lu_gp;
3112         int ret;
3113
3114         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3115                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3116                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3117
3118         subsys = target_core_subsystem[0];
3119         config_group_init(&subsys->su_group);
3120         mutex_init(&subsys->su_mutex);
3121
3122         ret = init_se_kmem_caches();
3123         if (ret < 0)
3124                 return ret;
3125         /*
3126          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3127          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3128          */
3129         target_cg = &subsys->su_group;
3130         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3131                                 GFP_KERNEL);
3132         if (!target_cg->default_groups) {
3133                 pr_err("Unable to allocate target_cg->default_groups\n");
3134                 ret = -ENOMEM;
3135                 goto out_global;
3136         }
3137
3138         config_group_init_type_name(&target_core_hbagroup,
3139                         "core", &target_core_cit);
3140         target_cg->default_groups[0] = &target_core_hbagroup;
3141         target_cg->default_groups[1] = NULL;
3142         /*
3143          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3144          */
3145         hba_cg = &target_core_hbagroup;
3146         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3147                                 GFP_KERNEL);
3148         if (!hba_cg->default_groups) {
3149                 pr_err("Unable to allocate hba_cg->default_groups\n");
3150                 ret = -ENOMEM;
3151                 goto out_global;
3152         }
3153         config_group_init_type_name(&alua_group,
3154                         "alua", &target_core_alua_cit);
3155         hba_cg->default_groups[0] = &alua_group;
3156         hba_cg->default_groups[1] = NULL;
3157         /*
3158          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3159          * groups under /sys/kernel/config/target/core/alua/
3160          */
3161         alua_cg = &alua_group;
3162         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3163                         GFP_KERNEL);
3164         if (!alua_cg->default_groups) {
3165                 pr_err("Unable to allocate alua_cg->default_groups\n");
3166                 ret = -ENOMEM;
3167                 goto out_global;
3168         }
3169
3170         config_group_init_type_name(&alua_lu_gps_group,
3171                         "lu_gps", &target_core_alua_lu_gps_cit);
3172         alua_cg->default_groups[0] = &alua_lu_gps_group;
3173         alua_cg->default_groups[1] = NULL;
3174         /*
3175          * Add core/alua/lu_gps/default_lu_gp
3176          */
3177         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3178         if (IS_ERR(lu_gp)) {
3179                 ret = -ENOMEM;
3180                 goto out_global;
3181         }
3182
3183         lu_gp_cg = &alua_lu_gps_group;
3184         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3185                         GFP_KERNEL);
3186         if (!lu_gp_cg->default_groups) {
3187                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3188                 ret = -ENOMEM;
3189                 goto out_global;
3190         }
3191
3192         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3193                                 &target_core_alua_lu_gp_cit);
3194         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3195         lu_gp_cg->default_groups[1] = NULL;
3196         default_lu_gp = lu_gp;
3197         /*
3198          * Register the target_core_mod subsystem with configfs.
3199          */
3200         ret = configfs_register_subsystem(subsys);
3201         if (ret < 0) {
3202                 pr_err("Error %d while registering subsystem %s\n",
3203                         ret, subsys->su_group.cg_item.ci_namebuf);
3204                 goto out_global;
3205         }
3206         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3207                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3208                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3209         /*
3210          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3211          */
3212         ret = rd_module_init();
3213         if (ret < 0)
3214                 goto out;
3215
3216         ret = core_dev_setup_virtual_lun0();
3217         if (ret < 0)
3218                 goto out;
3219
3220         ret = target_xcopy_setup_pt();
3221         if (ret < 0)
3222                 goto out;
3223
3224         return 0;
3225
3226 out:
3227         configfs_unregister_subsystem(subsys);
3228         core_dev_release_virtual_lun0();
3229         rd_module_exit();
3230 out_global:
3231         if (default_lu_gp) {
3232                 core_alua_free_lu_gp(default_lu_gp);
3233                 default_lu_gp = NULL;
3234         }
3235         if (lu_gp_cg)
3236                 kfree(lu_gp_cg->default_groups);
3237         if (alua_cg)
3238                 kfree(alua_cg->default_groups);
3239         if (hba_cg)
3240                 kfree(hba_cg->default_groups);
3241         kfree(target_cg->default_groups);
3242         release_se_kmem_caches();
3243         return ret;
3244 }
3245
3246 static void __exit target_core_exit_configfs(void)
3247 {
3248         struct configfs_subsystem *subsys;
3249         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3250         struct config_item *item;
3251         int i;
3252
3253         subsys = target_core_subsystem[0];
3254
3255         lu_gp_cg = &alua_lu_gps_group;
3256         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3257                 item = &lu_gp_cg->default_groups[i]->cg_item;
3258                 lu_gp_cg->default_groups[i] = NULL;
3259                 config_item_put(item);
3260         }
3261         kfree(lu_gp_cg->default_groups);
3262         lu_gp_cg->default_groups = NULL;
3263
3264         alua_cg = &alua_group;
3265         for (i = 0; alua_cg->default_groups[i]; i++) {
3266                 item = &alua_cg->default_groups[i]->cg_item;
3267                 alua_cg->default_groups[i] = NULL;
3268                 config_item_put(item);
3269         }
3270         kfree(alua_cg->default_groups);
3271         alua_cg->default_groups = NULL;
3272
3273         hba_cg = &target_core_hbagroup;
3274         for (i = 0; hba_cg->default_groups[i]; i++) {
3275                 item = &hba_cg->default_groups[i]->cg_item;
3276                 hba_cg->default_groups[i] = NULL;
3277                 config_item_put(item);
3278         }
3279         kfree(hba_cg->default_groups);
3280         hba_cg->default_groups = NULL;
3281         /*
3282          * We expect subsys->su_group.default_groups to be released
3283          * by configfs subsystem provider logic..
3284          */
3285         configfs_unregister_subsystem(subsys);
3286         kfree(subsys->su_group.default_groups);
3287
3288         core_alua_free_lu_gp(default_lu_gp);
3289         default_lu_gp = NULL;
3290
3291         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3292                         " Infrastructure\n");
3293
3294         core_dev_release_virtual_lun0();
3295         rd_module_exit();
3296         target_xcopy_release_pt();
3297         release_se_kmem_caches();
3298 }
3299
3300 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3301 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3302 MODULE_LICENSE("GPL");
3303
3304 module_init(target_core_init_configfs);
3305 module_exit(target_core_exit_configfs);