drivers/target/target_core_fabric_configfs.c

   1 /*******************************************************************************
   2 * Filename: target_core_fabric_configfs.c
   3  *
   4  * This file contains generic fabric module configfs infrastructure for
   5  * TCM v4.x code
   6  *
   7  * (c) Copyright 2010-2013 Datera, Inc.
   8  *
   9  * Nicholas A. Bellinger <nab@linux-iscsi.org>
  10 *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  ****************************************************************************/
  21
  22 #include <linux/module.h>
  23 #include <linux/moduleparam.h>
  24 #include <linux/utsname.h>
  25 #include <linux/init.h>
  26 #include <linux/fs.h>
  27 #include <linux/namei.h>
  28 #include <linux/slab.h>
  29 #include <linux/types.h>
  30 #include <linux/delay.h>
  31 #include <linux/unistd.h>
  32 #include <linux/string.h>
  33 #include <linux/syscalls.h>
  34 #include <linux/configfs.h>
  35
  36 #include <target/target_core_base.h>
  37 #include <target/target_core_fabric.h>
  38 #include <target/target_core_fabric_configfs.h>
  39 #include <target/target_core_configfs.h>
  40 #include <target/configfs_macros.h>
  41
  42 #include "target_core_internal.h"
  43 #include "target_core_alua.h"
  44 #include "target_core_pr.h"
  45
  46 #define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  47 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
  48 {                                                                       \
  49         struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
  50         struct config_item_type *cit = &tfc->tfc_##_name##_cit;         \
  51                                                                         \
  52         cit->ct_item_ops = _item_ops;                                   \
  53         cit->ct_group_ops = _group_ops;                                 \
  54         cit->ct_attrs = _attrs;                                         \
  55         cit->ct_owner = tf->tf_module;                                  \
  56         pr_debug("Setup generic %s\n", __stringify(_name));             \
  57 }
  58
  59 #define TF_CIT_SETUP_DRV(_name, _item_ops, _group_ops)          \
  60 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
  61 {                                                                       \
  62         struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
  63         struct config_item_type *cit = &tfc->tfc_##_name##_cit;         \
  64         struct configfs_attribute **attrs = tf->tf_ops.tfc_##_name##_attrs; \
  65                                                                         \
  66         cit->ct_item_ops = _item_ops;                                   \
  67         cit->ct_group_ops = _group_ops;                                 \
  68         cit->ct_attrs = attrs;                                          \
  69         cit->ct_owner = tf->tf_module;                                  \
  70         pr_debug("Setup generic %s\n", __stringify(_name));             \
  71 }
  72
  73 /* Start of tfc_tpg_mappedlun_cit */
  74
  75 static int target_fabric_mappedlun_link(
  76         struct config_item *lun_acl_ci,
  77         struct config_item *lun_ci)
  78 {
  79         struct se_dev_entry *deve;
  80         struct se_lun *lun = container_of(to_config_group(lun_ci),
  81                         struct se_lun, lun_group);
  82         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
  83                         struct se_lun_acl, se_lun_group);
  84         struct se_portal_group *se_tpg;
  85         struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
  86         int ret = 0, lun_access;
  87
  88         if (lun->lun_link_magic != SE_LUN_LINK_MAGIC) {
  89                 pr_err("Bad lun->lun_link_magic, not a valid lun_ci pointer:"
  90                         " %p to struct lun: %p\n", lun_ci, lun);
  91                 return -EFAULT;
  92         }
  93         /*
  94          * Ensure that the source port exists
  95          */
  96         if (!lun->lun_sep || !lun->lun_sep->sep_tpg) {
  97                 pr_err("Source se_lun->lun_sep or lun->lun_sep->sep"
  98                                 "_tpg does not exist\n");
  99                 return -EINVAL;
 100         }
 101         se_tpg = lun->lun_sep->sep_tpg;
 102
 103         nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
 104         tpg_ci = &nacl_ci->ci_group->cg_item;
 105         wwn_ci = &tpg_ci->ci_group->cg_item;
 106         tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
 107         wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
 108         /*
 109          * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
 110          */
 111         if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
 112                 pr_err("Illegal Initiator ACL SymLink outside of %s\n",
 113                         config_item_name(wwn_ci));
 114                 return -EINVAL;
 115         }
 116         if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
 117                 pr_err("Illegal Initiator ACL Symlink outside of %s"
 118                         " TPGT: %s\n", config_item_name(wwn_ci),
 119                         config_item_name(tpg_ci));
 120                 return -EINVAL;
 121         }
 122         /*
 123          * If this struct se_node_acl was dynamically generated with
 124          * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
 125          * which be will write protected (READ-ONLY) when
 126          * tpg_1/attrib/demo_mode_write_protect=1
 127          */
 128         spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
 129         deve = lacl->se_lun_nacl->device_list[lacl->mapped_lun];
 130         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
 131                 lun_access = deve->lun_flags;
 132         else
 133                 lun_access =
 134                         (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
 135                                 se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
 136                                            TRANSPORT_LUNFLAGS_READ_WRITE;
 137         spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
 138         /*
 139          * Determine the actual mapped LUN value user wants..
 140          *
 141          * This value is what the SCSI Initiator actually sees the
 142          * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
 143          */
 144         ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
 145                         lun->unpacked_lun, lun_access);
 146
 147         return (ret < 0) ? -EINVAL : 0;
 148 }
 149
 150 static int target_fabric_mappedlun_unlink(
 151         struct config_item *lun_acl_ci,
 152         struct config_item *lun_ci)
 153 {
 154         struct se_lun *lun;
 155         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
 156                         struct se_lun_acl, se_lun_group);
 157         struct se_node_acl *nacl = lacl->se_lun_nacl;
 158         struct se_dev_entry *deve = nacl->device_list[lacl->mapped_lun];
 159         struct se_portal_group *se_tpg;
 160         /*
 161          * Determine if the underlying MappedLUN has already been released..
 162          */
 163         if (!deve->se_lun)
 164                 return 0;
 165
 166         lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
 167         se_tpg = lun->lun_sep->sep_tpg;
 168
 169         core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
 170         return 0;
 171 }
 172
 173 CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
 174 #define TCM_MAPPEDLUN_ATTR(_name, _mode)                                \
 175 static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
 176         __CONFIGFS_EATTR(_name, _mode,                                  \
 177         target_fabric_mappedlun_show_##_name,                           \
 178         target_fabric_mappedlun_store_##_name);
 179
 180 static ssize_t target_fabric_mappedlun_show_write_protect(
 181         struct se_lun_acl *lacl,
 182         char *page)
 183 {
 184         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 185         struct se_dev_entry *deve;
 186         ssize_t len;
 187
 188         spin_lock_irq(&se_nacl->device_list_lock);
 189         deve = se_nacl->device_list[lacl->mapped_lun];
 190         len = sprintf(page, "%d\n",
 191                         (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
 192                         1 : 0);
 193         spin_unlock_irq(&se_nacl->device_list_lock);
 194
 195         return len;
 196 }
 197
 198 static ssize_t target_fabric_mappedlun_store_write_protect(
 199         struct se_lun_acl *lacl,
 200         const char *page,
 201         size_t count)
 202 {
 203         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 204         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 205         unsigned long op;
 206         int ret;
 207
 208         ret = kstrtoul(page, 0, &op);
 209         if (ret)
 210                 return ret;
 211
 212         if ((op != 1) && (op != 0))
 213                 return -EINVAL;
 214
 215         core_update_device_list_access(lacl->mapped_lun, (op) ?
 216                         TRANSPORT_LUNFLAGS_READ_ONLY :
 217                         TRANSPORT_LUNFLAGS_READ_WRITE,
 218                         lacl->se_lun_nacl);
 219
 220         pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
 221                 " Mapped LUN: %u Write Protect bit to %s\n",
 222                 se_tpg->se_tpg_tfo->get_fabric_name(),
 223                 lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
 224
 225         return count;
 226
 227 }
 228
 229 TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
 230
 231 CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
 232
 233 static void target_fabric_mappedlun_release(struct config_item *item)
 234 {
 235         struct se_lun_acl *lacl = container_of(to_config_group(item),
 236                                 struct se_lun_acl, se_lun_group);
 237         struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
 238
 239         core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
 240 }
 241
 242 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
 243         &target_fabric_mappedlun_write_protect.attr,
 244         NULL,
 245 };
 246
 247 static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
 248         .release                = target_fabric_mappedlun_release,
 249         .show_attribute         = target_fabric_mappedlun_attr_show,
 250         .store_attribute        = target_fabric_mappedlun_attr_store,
 251         .allow_link             = target_fabric_mappedlun_link,
 252         .drop_link              = target_fabric_mappedlun_unlink,
 253 };
 254
 255 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
 256                 target_fabric_mappedlun_attrs);
 257
 258 /* End of tfc_tpg_mappedlun_cit */
 259
 260 /* Start of tfc_tpg_mappedlun_port_cit */
 261
 262 static struct config_group *target_core_mappedlun_stat_mkdir(
 263         struct config_group *group,
 264         const char *name)
 265 {
 266         return ERR_PTR(-ENOSYS);
 267 }
 268
 269 static void target_core_mappedlun_stat_rmdir(
 270         struct config_group *group,
 271         struct config_item *item)
 272 {
 273         return;
 274 }
 275
 276 static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
 277         .make_group             = target_core_mappedlun_stat_mkdir,
 278         .drop_item              = target_core_mappedlun_stat_rmdir,
 279 };
 280
 281 TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
 282                 NULL);
 283
 284 /* End of tfc_tpg_mappedlun_port_cit */
 285
 286 /* Start of tfc_tpg_nacl_attrib_cit */
 287
 288 CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
 289
 290 static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
 291         .show_attribute         = target_fabric_nacl_attrib_attr_show,
 292         .store_attribute        = target_fabric_nacl_attrib_attr_store,
 293 };
 294
 295 TF_CIT_SETUP_DRV(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL);
 296
 297 /* End of tfc_tpg_nacl_attrib_cit */
 298
 299 /* Start of tfc_tpg_nacl_auth_cit */
 300
 301 CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
 302
 303 static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
 304         .show_attribute         = target_fabric_nacl_auth_attr_show,
 305         .store_attribute        = target_fabric_nacl_auth_attr_store,
 306 };
 307
 308 TF_CIT_SETUP_DRV(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL);
 309
 310 /* End of tfc_tpg_nacl_auth_cit */
 311
 312 /* Start of tfc_tpg_nacl_param_cit */
 313
 314 CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
 315
 316 static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
 317         .show_attribute         = target_fabric_nacl_param_attr_show,
 318         .store_attribute        = target_fabric_nacl_param_attr_store,
 319 };
 320
 321 TF_CIT_SETUP_DRV(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL);
 322
 323 /* End of tfc_tpg_nacl_param_cit */
 324
 325 /* Start of tfc_tpg_nacl_base_cit */
 326
 327 CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
 328
 329 static struct config_group *target_fabric_make_mappedlun(
 330         struct config_group *group,
 331         const char *name)
 332 {
 333         struct se_node_acl *se_nacl = container_of(group,
 334                         struct se_node_acl, acl_group);
 335         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 336         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 337         struct se_lun_acl *lacl = NULL;
 338         struct config_item *acl_ci;
 339         struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
 340         char *buf;
 341         unsigned long mapped_lun;
 342         int ret = 0;
 343
 344         acl_ci = &group->cg_item;
 345         if (!acl_ci) {
 346                 pr_err("Unable to locatel acl_ci\n");
 347                 return NULL;
 348         }
 349
 350         buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
 351         if (!buf) {
 352                 pr_err("Unable to allocate memory for name buf\n");
 353                 return ERR_PTR(-ENOMEM);
 354         }
 355         snprintf(buf, strlen(name) + 1, "%s", name);
 356         /*
 357          * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
 358          */
 359         if (strstr(buf, "lun_") != buf) {
 360                 pr_err("Unable to locate \"lun_\" from buf: %s"
 361                         " name: %s\n", buf, name);
 362                 ret = -EINVAL;
 363                 goto out;
 364         }
 365         /*
 366          * Determine the Mapped LUN value.  This is what the SCSI Initiator
 367          * Port will actually see.
 368          */
 369         ret = kstrtoul(buf + 4, 0, &mapped_lun);
 370         if (ret)
 371                 goto out;
 372         if (mapped_lun > UINT_MAX) {
 373                 ret = -EINVAL;
 374                 goto out;
 375         }
 376         if (mapped_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
 377                 pr_err("Mapped LUN: %lu exceeds TRANSPORT_MAX_LUNS_PER_TPG"
 378                         "-1: %u for Target Portal Group: %u\n", mapped_lun,
 379                         TRANSPORT_MAX_LUNS_PER_TPG-1,
 380                         se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
 381                 ret = -EINVAL;
 382                 goto out;
 383         }
 384
 385         lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
 386                         mapped_lun, &ret);
 387         if (!lacl) {
 388                 ret = -EINVAL;
 389                 goto out;
 390         }
 391
 392         lacl_cg = &lacl->se_lun_group;
 393         lacl_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 394                                 GFP_KERNEL);
 395         if (!lacl_cg->default_groups) {
 396                 pr_err("Unable to allocate lacl_cg->default_groups\n");
 397                 ret = -ENOMEM;
 398                 goto out;
 399         }
 400
 401         config_group_init_type_name(&lacl->se_lun_group, name,
 402                         &tf->tf_cit_tmpl.tfc_tpg_mappedlun_cit);
 403         config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
 404                         "statistics", &tf->tf_cit_tmpl.tfc_tpg_mappedlun_stat_cit);
 405         lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
 406         lacl_cg->default_groups[1] = NULL;
 407
 408         ml_stat_grp = &lacl->ml_stat_grps.stat_group;
 409         ml_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 3,
 410                                 GFP_KERNEL);
 411         if (!ml_stat_grp->default_groups) {
 412                 pr_err("Unable to allocate ml_stat_grp->default_groups\n");
 413                 ret = -ENOMEM;
 414                 goto out;
 415         }
 416         target_stat_setup_mappedlun_default_groups(lacl);
 417
 418         kfree(buf);
 419         return &lacl->se_lun_group;
 420 out:
 421         if (lacl_cg)
 422                 kfree(lacl_cg->default_groups);
 423         kfree(lacl);
 424         kfree(buf);
 425         return ERR_PTR(ret);
 426 }
 427
 428 static void target_fabric_drop_mappedlun(
 429         struct config_group *group,
 430         struct config_item *item)
 431 {
 432         struct se_lun_acl *lacl = container_of(to_config_group(item),
 433                         struct se_lun_acl, se_lun_group);
 434         struct config_item *df_item;
 435         struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
 436         int i;
 437
 438         ml_stat_grp = &lacl->ml_stat_grps.stat_group;
 439         for (i = 0; ml_stat_grp->default_groups[i]; i++) {
 440                 df_item = &ml_stat_grp->default_groups[i]->cg_item;
 441                 ml_stat_grp->default_groups[i] = NULL;
 442                 config_item_put(df_item);
 443         }
 444         kfree(ml_stat_grp->default_groups);
 445
 446         lacl_cg = &lacl->se_lun_group;
 447         for (i = 0; lacl_cg->default_groups[i]; i++) {
 448                 df_item = &lacl_cg->default_groups[i]->cg_item;
 449                 lacl_cg->default_groups[i] = NULL;
 450                 config_item_put(df_item);
 451         }
 452         kfree(lacl_cg->default_groups);
 453
 454         config_item_put(item);
 455 }
 456
 457 static void target_fabric_nacl_base_release(struct config_item *item)
 458 {
 459         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 460                         struct se_node_acl, acl_group);
 461         struct target_fabric_configfs *tf = se_nacl->se_tpg->se_tpg_wwn->wwn_tf;
 462
 463         if (tf->tf_ops.fabric_cleanup_nodeacl)
 464                 tf->tf_ops.fabric_cleanup_nodeacl(se_nacl);
 465         core_tpg_del_initiator_node_acl(se_nacl);
 466 }
 467
 468 static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
 469         .release                = target_fabric_nacl_base_release,
 470         .show_attribute         = target_fabric_nacl_base_attr_show,
 471         .store_attribute        = target_fabric_nacl_base_attr_store,
 472 };
 473
 474 static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
 475         .make_group             = target_fabric_make_mappedlun,
 476         .drop_item              = target_fabric_drop_mappedlun,
 477 };
 478
 479 TF_CIT_SETUP_DRV(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
 480                 &target_fabric_nacl_base_group_ops);
 481
 482 /* End of tfc_tpg_nacl_base_cit */
 483
 484 /* Start of tfc_node_fabric_stats_cit */
 485 /*
 486  * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
 487  * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
 488  */
 489 TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
 490
 491 /* End of tfc_wwn_fabric_stats_cit */
 492
 493 /* Start of tfc_tpg_nacl_cit */
 494
 495 static struct config_group *target_fabric_make_nodeacl(
 496         struct config_group *group,
 497         const char *name)
 498 {
 499         struct se_portal_group *se_tpg = container_of(group,
 500                         struct se_portal_group, tpg_acl_group);
 501         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 502         struct se_node_acl *se_nacl;
 503         struct config_group *nacl_cg;
 504
 505         se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name);
 506         if (IS_ERR(se_nacl))
 507                 return ERR_CAST(se_nacl);
 508
 509         if (tf->tf_ops.fabric_init_nodeacl) {
 510                 int ret = tf->tf_ops.fabric_init_nodeacl(se_nacl, name);
 511                 if (ret) {
 512                         core_tpg_del_initiator_node_acl(se_nacl);
 513                         return ERR_PTR(ret);
 514                 }
 515         }
 516
 517         nacl_cg = &se_nacl->acl_group;
 518         nacl_cg->default_groups = se_nacl->acl_default_groups;
 519         nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
 520         nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
 521         nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
 522         nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
 523         nacl_cg->default_groups[4] = NULL;
 524
 525         config_group_init_type_name(&se_nacl->acl_group, name,
 526                         &tf->tf_cit_tmpl.tfc_tpg_nacl_base_cit);
 527         config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
 528                         &tf->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit);
 529         config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
 530                         &tf->tf_cit_tmpl.tfc_tpg_nacl_auth_cit);
 531         config_group_init_type_name(&se_nacl->acl_param_group, "param",
 532                         &tf->tf_cit_tmpl.tfc_tpg_nacl_param_cit);
 533         config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
 534                         "fabric_statistics",
 535                         &tf->tf_cit_tmpl.tfc_tpg_nacl_stat_cit);
 536
 537         return &se_nacl->acl_group;
 538 }
 539
 540 static void target_fabric_drop_nodeacl(
 541         struct config_group *group,
 542         struct config_item *item)
 543 {
 544         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 545                         struct se_node_acl, acl_group);
 546         struct config_item *df_item;
 547         struct config_group *nacl_cg;
 548         int i;
 549
 550         nacl_cg = &se_nacl->acl_group;
 551         for (i = 0; nacl_cg->default_groups[i]; i++) {
 552                 df_item = &nacl_cg->default_groups[i]->cg_item;
 553                 nacl_cg->default_groups[i] = NULL;
 554                 config_item_put(df_item);
 555         }
 556         /*
 557          * struct se_node_acl free is done in target_fabric_nacl_base_release()
 558          */
 559         config_item_put(item);
 560 }
 561
 562 static struct configfs_group_operations target_fabric_nacl_group_ops = {
 563         .make_group     = target_fabric_make_nodeacl,
 564         .drop_item      = target_fabric_drop_nodeacl,
 565 };
 566
 567 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
 568
 569 /* End of tfc_tpg_nacl_cit */
 570
 571 /* Start of tfc_tpg_np_base_cit */
 572
 573 CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
 574
 575 static void target_fabric_np_base_release(struct config_item *item)
 576 {
 577         struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
 578                                 struct se_tpg_np, tpg_np_group);
 579         struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
 580         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 581
 582         tf->tf_ops.fabric_drop_np(se_tpg_np);
 583 }
 584
 585 static struct configfs_item_operations target_fabric_np_base_item_ops = {
 586         .release                = target_fabric_np_base_release,
 587         .show_attribute         = target_fabric_np_base_attr_show,
 588         .store_attribute        = target_fabric_np_base_attr_store,
 589 };
 590
 591 TF_CIT_SETUP_DRV(tpg_np_base, &target_fabric_np_base_item_ops, NULL);
 592
 593 /* End of tfc_tpg_np_base_cit */
 594
 595 /* Start of tfc_tpg_np_cit */
 596
 597 static struct config_group *target_fabric_make_np(
 598         struct config_group *group,
 599         const char *name)
 600 {
 601         struct se_portal_group *se_tpg = container_of(group,
 602                                 struct se_portal_group, tpg_np_group);
 603         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 604         struct se_tpg_np *se_tpg_np;
 605
 606         if (!tf->tf_ops.fabric_make_np) {
 607                 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
 608                 return ERR_PTR(-ENOSYS);
 609         }
 610
 611         se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
 612         if (!se_tpg_np || IS_ERR(se_tpg_np))
 613                 return ERR_PTR(-EINVAL);
 614
 615         se_tpg_np->tpg_np_parent = se_tpg;
 616         config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
 617                         &tf->tf_cit_tmpl.tfc_tpg_np_base_cit);
 618
 619         return &se_tpg_np->tpg_np_group;
 620 }
 621
 622 static void target_fabric_drop_np(
 623         struct config_group *group,
 624         struct config_item *item)
 625 {
 626         /*
 627          * struct se_tpg_np is released via target_fabric_np_base_release()
 628          */
 629         config_item_put(item);
 630 }
 631
 632 static struct configfs_group_operations target_fabric_np_group_ops = {
 633         .make_group     = &target_fabric_make_np,
 634         .drop_item      = &target_fabric_drop_np,
 635 };
 636
 637 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
 638
 639 /* End of tfc_tpg_np_cit */
 640
 641 /* Start of tfc_tpg_port_cit */
 642
 643 CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
 644 #define TCM_PORT_ATTR(_name, _mode)                                     \
 645 static struct target_fabric_port_attribute target_fabric_port_##_name = \
 646         __CONFIGFS_EATTR(_name, _mode,                                  \
 647         target_fabric_port_show_attr_##_name,                           \
 648         target_fabric_port_store_attr_##_name);
 649
 650 #define TCM_PORT_ATTOR_RO(_name)                                        \
 651         __CONFIGFS_EATTR_RO(_name,                                      \
 652         target_fabric_port_show_attr_##_name);
 653
 654 /*
 655  * alua_tg_pt_gp
 656  */
 657 static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
 658         struct se_lun *lun,
 659         char *page)
 660 {
 661         if (!lun || !lun->lun_sep)
 662                 return -ENODEV;
 663
 664         return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
 665 }
 666
 667 static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
 668         struct se_lun *lun,
 669         const char *page,
 670         size_t count)
 671 {
 672         if (!lun || !lun->lun_sep)
 673                 return -ENODEV;
 674
 675         return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
 676 }
 677
 678 TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
 679
 680 /*
 681  * alua_tg_pt_offline
 682  */
 683 static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
 684         struct se_lun *lun,
 685         char *page)
 686 {
 687         if (!lun || !lun->lun_sep)
 688                 return -ENODEV;
 689
 690         return core_alua_show_offline_bit(lun, page);
 691 }
 692
 693 static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
 694         struct se_lun *lun,
 695         const char *page,
 696         size_t count)
 697 {
 698         if (!lun || !lun->lun_sep)
 699                 return -ENODEV;
 700
 701         return core_alua_store_offline_bit(lun, page, count);
 702 }
 703
 704 TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
 705
 706 /*
 707  * alua_tg_pt_status
 708  */
 709 static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
 710         struct se_lun *lun,
 711         char *page)
 712 {
 713         if (!lun || !lun->lun_sep)
 714                 return -ENODEV;
 715
 716         return core_alua_show_secondary_status(lun, page);
 717 }
 718
 719 static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
 720         struct se_lun *lun,
 721         const char *page,
 722         size_t count)
 723 {
 724         if (!lun || !lun->lun_sep)
 725                 return -ENODEV;
 726
 727         return core_alua_store_secondary_status(lun, page, count);
 728 }
 729
 730 TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
 731
 732 /*
 733  * alua_tg_pt_write_md
 734  */
 735 static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
 736         struct se_lun *lun,
 737         char *page)
 738 {
 739         if (!lun || !lun->lun_sep)
 740                 return -ENODEV;
 741
 742         return core_alua_show_secondary_write_metadata(lun, page);
 743 }
 744
 745 static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
 746         struct se_lun *lun,
 747         const char *page,
 748         size_t count)
 749 {
 750         if (!lun || !lun->lun_sep)
 751                 return -ENODEV;
 752
 753         return core_alua_store_secondary_write_metadata(lun, page, count);
 754 }
 755
 756 TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
 757
 758
 759 static struct configfs_attribute *target_fabric_port_attrs[] = {
 760         &target_fabric_port_alua_tg_pt_gp.attr,
 761         &target_fabric_port_alua_tg_pt_offline.attr,
 762         &target_fabric_port_alua_tg_pt_status.attr,
 763         &target_fabric_port_alua_tg_pt_write_md.attr,
 764         NULL,
 765 };
 766
 767 CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
 768
 769 static int target_fabric_port_link(
 770         struct config_item *lun_ci,
 771         struct config_item *se_dev_ci)
 772 {
 773         struct config_item *tpg_ci;
 774         struct se_lun *lun = container_of(to_config_group(lun_ci),
 775                                 struct se_lun, lun_group);
 776         struct se_lun *lun_p;
 777         struct se_portal_group *se_tpg;
 778         struct se_device *dev =
 779                 container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
 780         struct target_fabric_configfs *tf;
 781         int ret;
 782
 783         if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
 784                 pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
 785                         " %p to struct se_device: %p\n", se_dev_ci, dev);
 786                 return -EFAULT;
 787         }
 788
 789         if (!(dev->dev_flags & DF_CONFIGURED)) {
 790                 pr_err("se_device not configured yet, cannot port link\n");
 791                 return -ENODEV;
 792         }
 793
 794         tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
 795         se_tpg = container_of(to_config_group(tpg_ci),
 796                                 struct se_portal_group, tpg_group);
 797         tf = se_tpg->se_tpg_wwn->wwn_tf;
 798
 799         if (lun->lun_se_dev !=  NULL) {
 800                 pr_err("Port Symlink already exists\n");
 801                 return -EEXIST;
 802         }
 803
 804         lun_p = core_dev_add_lun(se_tpg, dev, lun->unpacked_lun);
 805         if (IS_ERR(lun_p)) {
 806                 pr_err("core_dev_add_lun() failed\n");
 807                 ret = PTR_ERR(lun_p);
 808                 goto out;
 809         }
 810
 811         if (tf->tf_ops.fabric_post_link) {
 812                 /*
 813                  * Call the optional fabric_post_link() to allow a
 814                  * fabric module to setup any additional state once
 815                  * core_dev_add_lun() has been called..
 816                  */
 817                 tf->tf_ops.fabric_post_link(se_tpg, lun);
 818         }
 819
 820         return 0;
 821 out:
 822         return ret;
 823 }
 824
 825 static int target_fabric_port_unlink(
 826         struct config_item *lun_ci,
 827         struct config_item *se_dev_ci)
 828 {
 829         struct se_lun *lun = container_of(to_config_group(lun_ci),
 830                                 struct se_lun, lun_group);
 831         struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
 832         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 833
 834         if (tf->tf_ops.fabric_pre_unlink) {
 835                 /*
 836                  * Call the optional fabric_pre_unlink() to allow a
 837                  * fabric module to release any additional stat before
 838                  * core_dev_del_lun() is called.
 839                 */
 840                 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
 841         }
 842
 843         core_dev_del_lun(se_tpg, lun);
 844         return 0;
 845 }
 846
 847 static struct configfs_item_operations target_fabric_port_item_ops = {
 848         .show_attribute         = target_fabric_port_attr_show,
 849         .store_attribute        = target_fabric_port_attr_store,
 850         .allow_link             = target_fabric_port_link,
 851         .drop_link              = target_fabric_port_unlink,
 852 };
 853
 854 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
 855
 856 /* End of tfc_tpg_port_cit */
 857
 858 /* Start of tfc_tpg_port_stat_cit */
 859
 860 static struct config_group *target_core_port_stat_mkdir(
 861         struct config_group *group,
 862         const char *name)
 863 {
 864         return ERR_PTR(-ENOSYS);
 865 }
 866
 867 static void target_core_port_stat_rmdir(
 868         struct config_group *group,
 869         struct config_item *item)
 870 {
 871         return;
 872 }
 873
 874 static struct configfs_group_operations target_fabric_port_stat_group_ops = {
 875         .make_group             = target_core_port_stat_mkdir,
 876         .drop_item              = target_core_port_stat_rmdir,
 877 };
 878
 879 TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
 880
 881 /* End of tfc_tpg_port_stat_cit */
 882
 883 /* Start of tfc_tpg_lun_cit */
 884
 885 static struct config_group *target_fabric_make_lun(
 886         struct config_group *group,
 887         const char *name)
 888 {
 889         struct se_lun *lun;
 890         struct se_portal_group *se_tpg = container_of(group,
 891                         struct se_portal_group, tpg_lun_group);
 892         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 893         struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
 894         unsigned long unpacked_lun;
 895         int errno;
 896
 897         if (strstr(name, "lun_") != name) {
 898                 pr_err("Unable to locate \'_\" in"
 899                                 " \"lun_$LUN_NUMBER\"\n");
 900                 return ERR_PTR(-EINVAL);
 901         }
 902         errno = kstrtoul(name + 4, 0, &unpacked_lun);
 903         if (errno)
 904                 return ERR_PTR(errno);
 905         if (unpacked_lun > UINT_MAX)
 906                 return ERR_PTR(-EINVAL);
 907
 908         lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
 909         if (!lun)
 910                 return ERR_PTR(-EINVAL);
 911
 912         lun_cg = &lun->lun_group;
 913         lun_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 914                                 GFP_KERNEL);
 915         if (!lun_cg->default_groups) {
 916                 pr_err("Unable to allocate lun_cg->default_groups\n");
 917                 return ERR_PTR(-ENOMEM);
 918         }
 919
 920         config_group_init_type_name(&lun->lun_group, name,
 921                         &tf->tf_cit_tmpl.tfc_tpg_port_cit);
 922         config_group_init_type_name(&lun->port_stat_grps.stat_group,
 923                         "statistics", &tf->tf_cit_tmpl.tfc_tpg_port_stat_cit);
 924         lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
 925         lun_cg->default_groups[1] = NULL;
 926
 927         port_stat_grp = &lun->port_stat_grps.stat_group;
 928         port_stat_grp->default_groups =  kzalloc(sizeof(struct config_group *) * 4,
 929                                 GFP_KERNEL);
 930         if (!port_stat_grp->default_groups) {
 931                 pr_err("Unable to allocate port_stat_grp->default_groups\n");
 932                 kfree(lun_cg->default_groups);
 933                 return ERR_PTR(-ENOMEM);
 934         }
 935         target_stat_setup_port_default_groups(lun);
 936
 937         return &lun->lun_group;
 938 }
 939
 940 static void target_fabric_drop_lun(
 941         struct config_group *group,
 942         struct config_item *item)
 943 {
 944         struct se_lun *lun = container_of(to_config_group(item),
 945                                 struct se_lun, lun_group);
 946         struct config_item *df_item;
 947         struct config_group *lun_cg, *port_stat_grp;
 948         int i;
 949
 950         port_stat_grp = &lun->port_stat_grps.stat_group;
 951         for (i = 0; port_stat_grp->default_groups[i]; i++) {
 952                 df_item = &port_stat_grp->default_groups[i]->cg_item;
 953                 port_stat_grp->default_groups[i] = NULL;
 954                 config_item_put(df_item);
 955         }
 956         kfree(port_stat_grp->default_groups);
 957
 958         lun_cg = &lun->lun_group;
 959         for (i = 0; lun_cg->default_groups[i]; i++) {
 960                 df_item = &lun_cg->default_groups[i]->cg_item;
 961                 lun_cg->default_groups[i] = NULL;
 962                 config_item_put(df_item);
 963         }
 964         kfree(lun_cg->default_groups);
 965
 966         config_item_put(item);
 967 }
 968
 969 static struct configfs_group_operations target_fabric_lun_group_ops = {
 970         .make_group     = &target_fabric_make_lun,
 971         .drop_item      = &target_fabric_drop_lun,
 972 };
 973
 974 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
 975
 976 /* End of tfc_tpg_lun_cit */
 977
 978 /* Start of tfc_tpg_attrib_cit */
 979
 980 CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
 981
 982 static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
 983         .show_attribute         = target_fabric_tpg_attrib_attr_show,
 984         .store_attribute        = target_fabric_tpg_attrib_attr_store,
 985 };
 986
 987 TF_CIT_SETUP_DRV(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL);
 988
 989 /* End of tfc_tpg_attrib_cit */
 990
 991 /* Start of tfc_tpg_auth_cit */
 992
 993 CONFIGFS_EATTR_OPS(target_fabric_tpg_auth, se_portal_group, tpg_auth_group);
 994
 995 static struct configfs_item_operations target_fabric_tpg_auth_item_ops = {
 996         .show_attribute         = target_fabric_tpg_auth_attr_show,
 997         .store_attribute        = target_fabric_tpg_auth_attr_store,
 998 };
 999
1000 TF_CIT_SETUP_DRV(tpg_auth, &target_fabric_tpg_auth_item_ops, NULL);
1001
1002 /* End of tfc_tpg_attrib_cit */
1003
1004 /* Start of tfc_tpg_param_cit */
1005
1006 CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
1007
1008 static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
1009         .show_attribute         = target_fabric_tpg_param_attr_show,
1010         .store_attribute        = target_fabric_tpg_param_attr_store,
1011 };
1012
1013 TF_CIT_SETUP_DRV(tpg_param, &target_fabric_tpg_param_item_ops, NULL);
1014
1015 /* End of tfc_tpg_param_cit */
1016
1017 /* Start of tfc_tpg_base_cit */
1018 /*
1019  * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
1020  */
1021 CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
1022
1023 static void target_fabric_tpg_release(struct config_item *item)
1024 {
1025         struct se_portal_group *se_tpg = container_of(to_config_group(item),
1026                         struct se_portal_group, tpg_group);
1027         struct se_wwn *wwn = se_tpg->se_tpg_wwn;
1028         struct target_fabric_configfs *tf = wwn->wwn_tf;
1029
1030         tf->tf_ops.fabric_drop_tpg(se_tpg);
1031 }
1032
1033 static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
1034         .release                = target_fabric_tpg_release,
1035         .show_attribute         = target_fabric_tpg_attr_show,
1036         .store_attribute        = target_fabric_tpg_attr_store,
1037 };
1038
1039 TF_CIT_SETUP_DRV(tpg_base, &target_fabric_tpg_base_item_ops, NULL);
1040
1041 /* End of tfc_tpg_base_cit */
1042
1043 /* Start of tfc_tpg_cit */
1044
1045 static struct config_group *target_fabric_make_tpg(
1046         struct config_group *group,
1047         const char *name)
1048 {
1049         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
1050         struct target_fabric_configfs *tf = wwn->wwn_tf;
1051         struct se_portal_group *se_tpg;
1052
1053         if (!tf->tf_ops.fabric_make_tpg) {
1054                 pr_err("tf->tf_ops.fabric_make_tpg is NULL\n");
1055                 return ERR_PTR(-ENOSYS);
1056         }
1057
1058         se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
1059         if (!se_tpg || IS_ERR(se_tpg))
1060                 return ERR_PTR(-EINVAL);
1061         /*
1062          * Setup default groups from pre-allocated se_tpg->tpg_default_groups
1063          */
1064         se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
1065         se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
1066         se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
1067         se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
1068         se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
1069         se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_auth_group;
1070         se_tpg->tpg_group.default_groups[5] = &se_tpg->tpg_param_group;
1071         se_tpg->tpg_group.default_groups[6] = NULL;
1072
1073         config_group_init_type_name(&se_tpg->tpg_group, name,
1074                         &tf->tf_cit_tmpl.tfc_tpg_base_cit);
1075         config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
1076                         &tf->tf_cit_tmpl.tfc_tpg_lun_cit);
1077         config_group_init_type_name(&se_tpg->tpg_np_group, "np",
1078                         &tf->tf_cit_tmpl.tfc_tpg_np_cit);
1079         config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
1080                         &tf->tf_cit_tmpl.tfc_tpg_nacl_cit);
1081         config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
1082                         &tf->tf_cit_tmpl.tfc_tpg_attrib_cit);
1083         config_group_init_type_name(&se_tpg->tpg_auth_group, "auth",
1084                         &tf->tf_cit_tmpl.tfc_tpg_auth_cit);
1085         config_group_init_type_name(&se_tpg->tpg_param_group, "param",
1086                         &tf->tf_cit_tmpl.tfc_tpg_param_cit);
1087
1088         return &se_tpg->tpg_group;
1089 }
1090
1091 static void target_fabric_drop_tpg(
1092         struct config_group *group,
1093         struct config_item *item)
1094 {
1095         struct se_portal_group *se_tpg = container_of(to_config_group(item),
1096                                 struct se_portal_group, tpg_group);
1097         struct config_group *tpg_cg = &se_tpg->tpg_group;
1098         struct config_item *df_item;
1099         int i;
1100         /*
1101          * Release default groups, but do not release tpg_cg->default_groups
1102          * memory as it is statically allocated at se_tpg->tpg_default_groups.
1103          */
1104         for (i = 0; tpg_cg->default_groups[i]; i++) {
1105                 df_item = &tpg_cg->default_groups[i]->cg_item;
1106                 tpg_cg->default_groups[i] = NULL;
1107                 config_item_put(df_item);
1108         }
1109
1110         config_item_put(item);
1111 }
1112
1113 static void target_fabric_release_wwn(struct config_item *item)
1114 {
1115         struct se_wwn *wwn = container_of(to_config_group(item),
1116                                 struct se_wwn, wwn_group);
1117         struct target_fabric_configfs *tf = wwn->wwn_tf;
1118
1119         tf->tf_ops.fabric_drop_wwn(wwn);
1120 }
1121
1122 static struct configfs_item_operations target_fabric_tpg_item_ops = {
1123         .release        = target_fabric_release_wwn,
1124 };
1125
1126 static struct configfs_group_operations target_fabric_tpg_group_ops = {
1127         .make_group     = target_fabric_make_tpg,
1128         .drop_item      = target_fabric_drop_tpg,
1129 };
1130
1131 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
1132                 NULL);
1133
1134 /* End of tfc_tpg_cit */
1135
1136 /* Start of tfc_wwn_fabric_stats_cit */
1137 /*
1138  * This is used as a placeholder for struct se_wwn->fabric_stat_group
1139  * to allow fabrics access to ->fabric_stat_group->default_groups[]
1140  */
1141 TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
1142
1143 /* End of tfc_wwn_fabric_stats_cit */
1144
1145 /* Start of tfc_wwn_cit */
1146
1147 static struct config_group *target_fabric_make_wwn(
1148         struct config_group *group,
1149         const char *name)
1150 {
1151         struct target_fabric_configfs *tf = container_of(group,
1152                                 struct target_fabric_configfs, tf_group);
1153         struct se_wwn *wwn;
1154
1155         if (!tf->tf_ops.fabric_make_wwn) {
1156                 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
1157                 return ERR_PTR(-ENOSYS);
1158         }
1159
1160         wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
1161         if (!wwn || IS_ERR(wwn))
1162                 return ERR_PTR(-EINVAL);
1163
1164         wwn->wwn_tf = tf;
1165         /*
1166          * Setup default groups from pre-allocated wwn->wwn_default_groups
1167          */
1168         wwn->wwn_group.default_groups = wwn->wwn_default_groups;
1169         wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
1170         wwn->wwn_group.default_groups[1] = NULL;
1171
1172         config_group_init_type_name(&wwn->wwn_group, name,
1173                         &tf->tf_cit_tmpl.tfc_tpg_cit);
1174         config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
1175                         &tf->tf_cit_tmpl.tfc_wwn_fabric_stats_cit);
1176
1177         return &wwn->wwn_group;
1178 }
1179
1180 static void target_fabric_drop_wwn(
1181         struct config_group *group,
1182         struct config_item *item)
1183 {
1184         struct se_wwn *wwn = container_of(to_config_group(item),
1185                                 struct se_wwn, wwn_group);
1186         struct config_item *df_item;
1187         struct config_group *cg = &wwn->wwn_group;
1188         int i;
1189
1190         for (i = 0; cg->default_groups[i]; i++) {
1191                 df_item = &cg->default_groups[i]->cg_item;
1192                 cg->default_groups[i] = NULL;
1193                 config_item_put(df_item);
1194         }
1195
1196         config_item_put(item);
1197 }
1198
1199 static struct configfs_group_operations target_fabric_wwn_group_ops = {
1200         .make_group     = target_fabric_make_wwn,
1201         .drop_item      = target_fabric_drop_wwn,
1202 };
1203 /*
1204  * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
1205  */
1206 CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
1207
1208 static struct configfs_item_operations target_fabric_wwn_item_ops = {
1209         .show_attribute         = target_fabric_wwn_attr_show,
1210         .store_attribute        = target_fabric_wwn_attr_store,
1211 };
1212
1213 TF_CIT_SETUP_DRV(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops);
1214
1215 /* End of tfc_wwn_cit */
1216
1217 /* Start of tfc_discovery_cit */
1218
1219 CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
1220                 tf_disc_group);
1221
1222 static struct configfs_item_operations target_fabric_discovery_item_ops = {
1223         .show_attribute         = target_fabric_discovery_attr_show,
1224         .store_attribute        = target_fabric_discovery_attr_store,
1225 };
1226
1227 TF_CIT_SETUP_DRV(discovery, &target_fabric_discovery_item_ops, NULL);
1228
1229 /* End of tfc_discovery_cit */
1230
1231 int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1232 {
1233         target_fabric_setup_discovery_cit(tf);
1234         target_fabric_setup_wwn_cit(tf);
1235         target_fabric_setup_wwn_fabric_stats_cit(tf);
1236         target_fabric_setup_tpg_cit(tf);
1237         target_fabric_setup_tpg_base_cit(tf);
1238         target_fabric_setup_tpg_port_cit(tf);
1239         target_fabric_setup_tpg_port_stat_cit(tf);
1240         target_fabric_setup_tpg_lun_cit(tf);
1241         target_fabric_setup_tpg_np_cit(tf);
1242         target_fabric_setup_tpg_np_base_cit(tf);
1243         target_fabric_setup_tpg_attrib_cit(tf);
1244         target_fabric_setup_tpg_auth_cit(tf);
1245         target_fabric_setup_tpg_param_cit(tf);
1246         target_fabric_setup_tpg_nacl_cit(tf);
1247         target_fabric_setup_tpg_nacl_base_cit(tf);
1248         target_fabric_setup_tpg_nacl_attrib_cit(tf);
1249         target_fabric_setup_tpg_nacl_auth_cit(tf);
1250         target_fabric_setup_tpg_nacl_param_cit(tf);
1251         target_fabric_setup_tpg_nacl_stat_cit(tf);
1252         target_fabric_setup_tpg_mappedlun_cit(tf);
1253         target_fabric_setup_tpg_mappedlun_stat_cit(tf);
1254
1255         return 0;
1256 }