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  * Copyright (c) 2010,2011 Rising Tide Systems
   8  * Copyright (c) 2010,2011 Linux-iSCSI.org
   9  *
  10  * Copyright (c) Nicholas A. Bellinger <nab@linux-iscsi.org>
  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/syscalls.h>
  36 #include <linux/configfs.h>
  37
  38 #include <target/target_core_base.h>
  39 #include <target/target_core_fabric.h>
  40 #include <target/target_core_fabric_configfs.h>
  41 #include <target/target_core_configfs.h>
  42 #include <target/configfs_macros.h>
  43
  44 #include "target_core_internal.h"
  45 #include "target_core_alua.h"
  46 #include "target_core_pr.h"
  47
  48 #define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  49 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
  50 {                                                                       \
  51         struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
  52         struct config_item_type *cit = &tfc->tfc_##_name##_cit;         \
  53                                                                         \
  54         cit->ct_item_ops = _item_ops;                                   \
  55         cit->ct_group_ops = _group_ops;                                 \
  56         cit->ct_attrs = _attrs;                                         \
  57         cit->ct_owner = tf->tf_module;                                  \
  58         pr_debug("Setup generic %s\n", __stringify(_name));             \
  59 }
  60
  61 /* Start of tfc_tpg_mappedlun_cit */
  62
  63 static int target_fabric_mappedlun_link(
  64         struct config_item *lun_acl_ci,
  65         struct config_item *lun_ci)
  66 {
  67         struct se_dev_entry *deve;
  68         struct se_lun *lun = container_of(to_config_group(lun_ci),
  69                         struct se_lun, lun_group);
  70         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
  71                         struct se_lun_acl, se_lun_group);
  72         struct se_portal_group *se_tpg;
  73         struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
  74         int ret = 0, lun_access;
  75
  76         if (lun->lun_link_magic != SE_LUN_LINK_MAGIC) {
  77                 pr_err("Bad lun->lun_link_magic, not a valid lun_ci pointer:"
  78                         " %p to struct lun: %p\n", lun_ci, lun);
  79                 return -EFAULT;
  80         }
  81         /*
  82          * Ensure that the source port exists
  83          */
  84         if (!lun->lun_sep || !lun->lun_sep->sep_tpg) {
  85                 pr_err("Source se_lun->lun_sep or lun->lun_sep->sep"
  86                                 "_tpg does not exist\n");
  87                 return -EINVAL;
  88         }
  89         se_tpg = lun->lun_sep->sep_tpg;
  90
  91         nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
  92         tpg_ci = &nacl_ci->ci_group->cg_item;
  93         wwn_ci = &tpg_ci->ci_group->cg_item;
  94         tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
  95         wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
  96         /*
  97          * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
  98          */
  99         if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
 100                 pr_err("Illegal Initiator ACL SymLink outside of %s\n",
 101                         config_item_name(wwn_ci));
 102                 return -EINVAL;
 103         }
 104         if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
 105                 pr_err("Illegal Initiator ACL Symlink outside of %s"
 106                         " TPGT: %s\n", config_item_name(wwn_ci),
 107                         config_item_name(tpg_ci));
 108                 return -EINVAL;
 109         }
 110         /*
 111          * If this struct se_node_acl was dynamically generated with
 112          * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
 113          * which be will write protected (READ-ONLY) when
 114          * tpg_1/attrib/demo_mode_write_protect=1
 115          */
 116         spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
 117         deve = lacl->se_lun_nacl->device_list[lacl->mapped_lun];
 118         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
 119                 lun_access = deve->lun_flags;
 120         else
 121                 lun_access =
 122                         (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
 123                                 se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
 124                                            TRANSPORT_LUNFLAGS_READ_WRITE;
 125         spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
 126         /*
 127          * Determine the actual mapped LUN value user wants..
 128          *
 129          * This value is what the SCSI Initiator actually sees the
 130          * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
 131          */
 132         ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
 133                         lun->unpacked_lun, lun_access);
 134
 135         return (ret < 0) ? -EINVAL : 0;
 136 }
 137
 138 static int target_fabric_mappedlun_unlink(
 139         struct config_item *lun_acl_ci,
 140         struct config_item *lun_ci)
 141 {
 142         struct se_lun *lun;
 143         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
 144                         struct se_lun_acl, se_lun_group);
 145         struct se_node_acl *nacl = lacl->se_lun_nacl;
 146         struct se_dev_entry *deve = nacl->device_list[lacl->mapped_lun];
 147         struct se_portal_group *se_tpg;
 148         /*
 149          * Determine if the underlying MappedLUN has already been released..
 150          */
 151         if (!deve->se_lun)
 152                 return 0;
 153
 154         lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
 155         se_tpg = lun->lun_sep->sep_tpg;
 156
 157         core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
 158         return 0;
 159 }
 160
 161 CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
 162 #define TCM_MAPPEDLUN_ATTR(_name, _mode)                                \
 163 static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
 164         __CONFIGFS_EATTR(_name, _mode,                                  \
 165         target_fabric_mappedlun_show_##_name,                           \
 166         target_fabric_mappedlun_store_##_name);
 167
 168 static ssize_t target_fabric_mappedlun_show_write_protect(
 169         struct se_lun_acl *lacl,
 170         char *page)
 171 {
 172         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 173         struct se_dev_entry *deve;
 174         ssize_t len;
 175
 176         spin_lock_irq(&se_nacl->device_list_lock);
 177         deve = se_nacl->device_list[lacl->mapped_lun];
 178         len = sprintf(page, "%d\n",
 179                         (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
 180                         1 : 0);
 181         spin_unlock_irq(&se_nacl->device_list_lock);
 182
 183         return len;
 184 }
 185
 186 static ssize_t target_fabric_mappedlun_store_write_protect(
 187         struct se_lun_acl *lacl,
 188         const char *page,
 189         size_t count)
 190 {
 191         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 192         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 193         unsigned long op;
 194
 195         if (strict_strtoul(page, 0, &op))
 196                 return -EINVAL;
 197
 198         if ((op != 1) && (op != 0))
 199                 return -EINVAL;
 200
 201         core_update_device_list_access(lacl->mapped_lun, (op) ?
 202                         TRANSPORT_LUNFLAGS_READ_ONLY :
 203                         TRANSPORT_LUNFLAGS_READ_WRITE,
 204                         lacl->se_lun_nacl);
 205
 206         pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
 207                 " Mapped LUN: %u Write Protect bit to %s\n",
 208                 se_tpg->se_tpg_tfo->get_fabric_name(),
 209                 lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
 210
 211         return count;
 212
 213 }
 214
 215 TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
 216
 217 CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
 218
 219 static void target_fabric_mappedlun_release(struct config_item *item)
 220 {
 221         struct se_lun_acl *lacl = container_of(to_config_group(item),
 222                                 struct se_lun_acl, se_lun_group);
 223         struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
 224
 225         core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
 226 }
 227
 228 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
 229         &target_fabric_mappedlun_write_protect.attr,
 230         NULL,
 231 };
 232
 233 static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
 234         .release                = target_fabric_mappedlun_release,
 235         .show_attribute         = target_fabric_mappedlun_attr_show,
 236         .store_attribute        = target_fabric_mappedlun_attr_store,
 237         .allow_link             = target_fabric_mappedlun_link,
 238         .drop_link              = target_fabric_mappedlun_unlink,
 239 };
 240
 241 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
 242                 target_fabric_mappedlun_attrs);
 243
 244 /* End of tfc_tpg_mappedlun_cit */
 245
 246 /* Start of tfc_tpg_mappedlun_port_cit */
 247
 248 static struct config_group *target_core_mappedlun_stat_mkdir(
 249         struct config_group *group,
 250         const char *name)
 251 {
 252         return ERR_PTR(-ENOSYS);
 253 }
 254
 255 static void target_core_mappedlun_stat_rmdir(
 256         struct config_group *group,
 257         struct config_item *item)
 258 {
 259         return;
 260 }
 261
 262 static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
 263         .make_group             = target_core_mappedlun_stat_mkdir,
 264         .drop_item              = target_core_mappedlun_stat_rmdir,
 265 };
 266
 267 TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
 268                 NULL);
 269
 270 /* End of tfc_tpg_mappedlun_port_cit */
 271
 272 /* Start of tfc_tpg_nacl_attrib_cit */
 273
 274 CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
 275
 276 static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
 277         .show_attribute         = target_fabric_nacl_attrib_attr_show,
 278         .store_attribute        = target_fabric_nacl_attrib_attr_store,
 279 };
 280
 281 TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
 282
 283 /* End of tfc_tpg_nacl_attrib_cit */
 284
 285 /* Start of tfc_tpg_nacl_auth_cit */
 286
 287 CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
 288
 289 static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
 290         .show_attribute         = target_fabric_nacl_auth_attr_show,
 291         .store_attribute        = target_fabric_nacl_auth_attr_store,
 292 };
 293
 294 TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
 295
 296 /* End of tfc_tpg_nacl_auth_cit */
 297
 298 /* Start of tfc_tpg_nacl_param_cit */
 299
 300 CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
 301
 302 static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
 303         .show_attribute         = target_fabric_nacl_param_attr_show,
 304         .store_attribute        = target_fabric_nacl_param_attr_store,
 305 };
 306
 307 TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
 308
 309 /* End of tfc_tpg_nacl_param_cit */
 310
 311 /* Start of tfc_tpg_nacl_base_cit */
 312
 313 CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
 314
 315 static struct config_group *target_fabric_make_mappedlun(
 316         struct config_group *group,
 317         const char *name)
 318 {
 319         struct se_node_acl *se_nacl = container_of(group,
 320                         struct se_node_acl, acl_group);
 321         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 322         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 323         struct se_lun_acl *lacl;
 324         struct config_item *acl_ci;
 325         struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
 326         char *buf;
 327         unsigned long mapped_lun;
 328         int ret = 0;
 329
 330         acl_ci = &group->cg_item;
 331         if (!acl_ci) {
 332                 pr_err("Unable to locatel acl_ci\n");
 333                 return NULL;
 334         }
 335
 336         buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
 337         if (!buf) {
 338                 pr_err("Unable to allocate memory for name buf\n");
 339                 return ERR_PTR(-ENOMEM);
 340         }
 341         snprintf(buf, strlen(name) + 1, "%s", name);
 342         /*
 343          * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
 344          */
 345         if (strstr(buf, "lun_") != buf) {
 346                 pr_err("Unable to locate \"lun_\" from buf: %s"
 347                         " name: %s\n", buf, name);
 348                 ret = -EINVAL;
 349                 goto out;
 350         }
 351         /*
 352          * Determine the Mapped LUN value.  This is what the SCSI Initiator
 353          * Port will actually see.
 354          */
 355         if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
 356                 ret = -EINVAL;
 357                 goto out;
 358         }
 359         if (mapped_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
 360                 pr_err("Mapped LUN: %lu exceeds TRANSPORT_MAX_LUNS_PER_TPG"
 361                         "-1: %u for Target Portal Group: %u\n", mapped_lun,
 362                         TRANSPORT_MAX_LUNS_PER_TPG-1,
 363                         se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
 364                 ret = -EINVAL;
 365                 goto out;
 366         }
 367
 368         lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
 369                         mapped_lun, &ret);
 370         if (!lacl) {
 371                 ret = -EINVAL;
 372                 goto out;
 373         }
 374
 375         lacl_cg = &lacl->se_lun_group;
 376         lacl_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
 377                                 GFP_KERNEL);
 378         if (!lacl_cg->default_groups) {
 379                 pr_err("Unable to allocate lacl_cg->default_groups\n");
 380                 ret = -ENOMEM;
 381                 goto out;
 382         }
 383
 384         config_group_init_type_name(&lacl->se_lun_group, name,
 385                         &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
 386         config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
 387                         "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_stat_cit);
 388         lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
 389         lacl_cg->default_groups[1] = NULL;
 390
 391         ml_stat_grp = &lacl->ml_stat_grps.stat_group;
 392         ml_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
 393                                 GFP_KERNEL);
 394         if (!ml_stat_grp->default_groups) {
 395                 pr_err("Unable to allocate ml_stat_grp->default_groups\n");
 396                 ret = -ENOMEM;
 397                 goto out;
 398         }
 399         target_stat_setup_mappedlun_default_groups(lacl);
 400
 401         kfree(buf);
 402         return &lacl->se_lun_group;
 403 out:
 404         if (lacl_cg)
 405                 kfree(lacl_cg->default_groups);
 406         kfree(buf);
 407         return ERR_PTR(ret);
 408 }
 409
 410 static void target_fabric_drop_mappedlun(
 411         struct config_group *group,
 412         struct config_item *item)
 413 {
 414         struct se_lun_acl *lacl = container_of(to_config_group(item),
 415                         struct se_lun_acl, se_lun_group);
 416         struct config_item *df_item;
 417         struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
 418         int i;
 419
 420         ml_stat_grp = &lacl->ml_stat_grps.stat_group;
 421         for (i = 0; ml_stat_grp->default_groups[i]; i++) {
 422                 df_item = &ml_stat_grp->default_groups[i]->cg_item;
 423                 ml_stat_grp->default_groups[i] = NULL;
 424                 config_item_put(df_item);
 425         }
 426         kfree(ml_stat_grp->default_groups);
 427
 428         lacl_cg = &lacl->se_lun_group;
 429         for (i = 0; lacl_cg->default_groups[i]; i++) {
 430                 df_item = &lacl_cg->default_groups[i]->cg_item;
 431                 lacl_cg->default_groups[i] = NULL;
 432                 config_item_put(df_item);
 433         }
 434         kfree(lacl_cg->default_groups);
 435
 436         config_item_put(item);
 437 }
 438
 439 static void target_fabric_nacl_base_release(struct config_item *item)
 440 {
 441         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 442                         struct se_node_acl, acl_group);
 443         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 444         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 445
 446         tf->tf_ops.fabric_drop_nodeacl(se_nacl);
 447 }
 448
 449 static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
 450         .release                = target_fabric_nacl_base_release,
 451         .show_attribute         = target_fabric_nacl_base_attr_show,
 452         .store_attribute        = target_fabric_nacl_base_attr_store,
 453 };
 454
 455 static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
 456         .make_group             = target_fabric_make_mappedlun,
 457         .drop_item              = target_fabric_drop_mappedlun,
 458 };
 459
 460 TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
 461                 &target_fabric_nacl_base_group_ops, NULL);
 462
 463 /* End of tfc_tpg_nacl_base_cit */
 464
 465 /* Start of tfc_node_fabric_stats_cit */
 466 /*
 467  * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
 468  * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
 469  */
 470 TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
 471
 472 /* End of tfc_wwn_fabric_stats_cit */
 473
 474 /* Start of tfc_tpg_nacl_cit */
 475
 476 static struct config_group *target_fabric_make_nodeacl(
 477         struct config_group *group,
 478         const char *name)
 479 {
 480         struct se_portal_group *se_tpg = container_of(group,
 481                         struct se_portal_group, tpg_acl_group);
 482         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 483         struct se_node_acl *se_nacl;
 484         struct config_group *nacl_cg;
 485
 486         if (!tf->tf_ops.fabric_make_nodeacl) {
 487                 pr_err("tf->tf_ops.fabric_make_nodeacl is NULL\n");
 488                 return ERR_PTR(-ENOSYS);
 489         }
 490
 491         se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
 492         if (IS_ERR(se_nacl))
 493                 return ERR_CAST(se_nacl);
 494
 495         nacl_cg = &se_nacl->acl_group;
 496         nacl_cg->default_groups = se_nacl->acl_default_groups;
 497         nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
 498         nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
 499         nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
 500         nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
 501         nacl_cg->default_groups[4] = NULL;
 502
 503         config_group_init_type_name(&se_nacl->acl_group, name,
 504                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
 505         config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
 506                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
 507         config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
 508                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
 509         config_group_init_type_name(&se_nacl->acl_param_group, "param",
 510                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
 511         config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
 512                         "fabric_statistics",
 513                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_stat_cit);
 514
 515         return &se_nacl->acl_group;
 516 }
 517
 518 static void target_fabric_drop_nodeacl(
 519         struct config_group *group,
 520         struct config_item *item)
 521 {
 522         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 523                         struct se_node_acl, acl_group);
 524         struct config_item *df_item;
 525         struct config_group *nacl_cg;
 526         int i;
 527
 528         nacl_cg = &se_nacl->acl_group;
 529         for (i = 0; nacl_cg->default_groups[i]; i++) {
 530                 df_item = &nacl_cg->default_groups[i]->cg_item;
 531                 nacl_cg->default_groups[i] = NULL;
 532                 config_item_put(df_item);
 533         }
 534         /*
 535          * struct se_node_acl free is done in target_fabric_nacl_base_release()
 536          */
 537         config_item_put(item);
 538 }
 539
 540 static struct configfs_group_operations target_fabric_nacl_group_ops = {
 541         .make_group     = target_fabric_make_nodeacl,
 542         .drop_item      = target_fabric_drop_nodeacl,
 543 };
 544
 545 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
 546
 547 /* End of tfc_tpg_nacl_cit */
 548
 549 /* Start of tfc_tpg_np_base_cit */
 550
 551 CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
 552
 553 static void target_fabric_np_base_release(struct config_item *item)
 554 {
 555         struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
 556                                 struct se_tpg_np, tpg_np_group);
 557         struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
 558         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 559
 560         tf->tf_ops.fabric_drop_np(se_tpg_np);
 561 }
 562
 563 static struct configfs_item_operations target_fabric_np_base_item_ops = {
 564         .release                = target_fabric_np_base_release,
 565         .show_attribute         = target_fabric_np_base_attr_show,
 566         .store_attribute        = target_fabric_np_base_attr_store,
 567 };
 568
 569 TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
 570
 571 /* End of tfc_tpg_np_base_cit */
 572
 573 /* Start of tfc_tpg_np_cit */
 574
 575 static struct config_group *target_fabric_make_np(
 576         struct config_group *group,
 577         const char *name)
 578 {
 579         struct se_portal_group *se_tpg = container_of(group,
 580                                 struct se_portal_group, tpg_np_group);
 581         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 582         struct se_tpg_np *se_tpg_np;
 583
 584         if (!tf->tf_ops.fabric_make_np) {
 585                 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
 586                 return ERR_PTR(-ENOSYS);
 587         }
 588
 589         se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
 590         if (!se_tpg_np || IS_ERR(se_tpg_np))
 591                 return ERR_PTR(-EINVAL);
 592
 593         se_tpg_np->tpg_np_parent = se_tpg;
 594         config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
 595                         &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
 596
 597         return &se_tpg_np->tpg_np_group;
 598 }
 599
 600 static void target_fabric_drop_np(
 601         struct config_group *group,
 602         struct config_item *item)
 603 {
 604         /*
 605          * struct se_tpg_np is released via target_fabric_np_base_release()
 606          */
 607         config_item_put(item);
 608 }
 609
 610 static struct configfs_group_operations target_fabric_np_group_ops = {
 611         .make_group     = &target_fabric_make_np,
 612         .drop_item      = &target_fabric_drop_np,
 613 };
 614
 615 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
 616
 617 /* End of tfc_tpg_np_cit */
 618
 619 /* Start of tfc_tpg_port_cit */
 620
 621 CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
 622 #define TCM_PORT_ATTR(_name, _mode)                                     \
 623 static struct target_fabric_port_attribute target_fabric_port_##_name = \
 624         __CONFIGFS_EATTR(_name, _mode,                                  \
 625         target_fabric_port_show_attr_##_name,                           \
 626         target_fabric_port_store_attr_##_name);
 627
 628 #define TCM_PORT_ATTOR_RO(_name)                                        \
 629         __CONFIGFS_EATTR_RO(_name,                                      \
 630         target_fabric_port_show_attr_##_name);
 631
 632 /*
 633  * alua_tg_pt_gp
 634  */
 635 static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
 636         struct se_lun *lun,
 637         char *page)
 638 {
 639         if (!lun || !lun->lun_sep)
 640                 return -ENODEV;
 641
 642         return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
 643 }
 644
 645 static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
 646         struct se_lun *lun,
 647         const char *page,
 648         size_t count)
 649 {
 650         if (!lun || !lun->lun_sep)
 651                 return -ENODEV;
 652
 653         return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
 654 }
 655
 656 TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
 657
 658 /*
 659  * alua_tg_pt_offline
 660  */
 661 static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
 662         struct se_lun *lun,
 663         char *page)
 664 {
 665         if (!lun || !lun->lun_sep)
 666                 return -ENODEV;
 667
 668         return core_alua_show_offline_bit(lun, page);
 669 }
 670
 671 static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
 672         struct se_lun *lun,
 673         const char *page,
 674         size_t count)
 675 {
 676         if (!lun || !lun->lun_sep)
 677                 return -ENODEV;
 678
 679         return core_alua_store_offline_bit(lun, page, count);
 680 }
 681
 682 TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
 683
 684 /*
 685  * alua_tg_pt_status
 686  */
 687 static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
 688         struct se_lun *lun,
 689         char *page)
 690 {
 691         if (!lun || !lun->lun_sep)
 692                 return -ENODEV;
 693
 694         return core_alua_show_secondary_status(lun, page);
 695 }
 696
 697 static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
 698         struct se_lun *lun,
 699         const char *page,
 700         size_t count)
 701 {
 702         if (!lun || !lun->lun_sep)
 703                 return -ENODEV;
 704
 705         return core_alua_store_secondary_status(lun, page, count);
 706 }
 707
 708 TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
 709
 710 /*
 711  * alua_tg_pt_write_md
 712  */
 713 static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
 714         struct se_lun *lun,
 715         char *page)
 716 {
 717         if (!lun || !lun->lun_sep)
 718                 return -ENODEV;
 719
 720         return core_alua_show_secondary_write_metadata(lun, page);
 721 }
 722
 723 static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
 724         struct se_lun *lun,
 725         const char *page,
 726         size_t count)
 727 {
 728         if (!lun || !lun->lun_sep)
 729                 return -ENODEV;
 730
 731         return core_alua_store_secondary_write_metadata(lun, page, count);
 732 }
 733
 734 TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
 735
 736
 737 static struct configfs_attribute *target_fabric_port_attrs[] = {
 738         &target_fabric_port_alua_tg_pt_gp.attr,
 739         &target_fabric_port_alua_tg_pt_offline.attr,
 740         &target_fabric_port_alua_tg_pt_status.attr,
 741         &target_fabric_port_alua_tg_pt_write_md.attr,
 742         NULL,
 743 };
 744
 745 CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
 746
 747 static int target_fabric_port_link(
 748         struct config_item *lun_ci,
 749         struct config_item *se_dev_ci)
 750 {
 751         struct config_item *tpg_ci;
 752         struct se_device *dev;
 753         struct se_lun *lun = container_of(to_config_group(lun_ci),
 754                                 struct se_lun, lun_group);
 755         struct se_lun *lun_p;
 756         struct se_portal_group *se_tpg;
 757         struct se_subsystem_dev *se_dev = container_of(
 758                                 to_config_group(se_dev_ci), struct se_subsystem_dev,
 759                                 se_dev_group);
 760         struct target_fabric_configfs *tf;
 761         int ret;
 762
 763         tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
 764         se_tpg = container_of(to_config_group(tpg_ci),
 765                                 struct se_portal_group, tpg_group);
 766         tf = se_tpg->se_tpg_wwn->wwn_tf;
 767
 768         if (lun->lun_se_dev !=  NULL) {
 769                 pr_err("Port Symlink already exists\n");
 770                 return -EEXIST;
 771         }
 772
 773         dev = se_dev->se_dev_ptr;
 774         if (!dev) {
 775                 pr_err("Unable to locate struct se_device pointer from"
 776                         " %s\n", config_item_name(se_dev_ci));
 777                 ret = -ENODEV;
 778                 goto out;
 779         }
 780         if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
 781                 pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
 782                         " %p to struct se_device: %p\n", se_dev_ci, dev);
 783                 return -EFAULT;
 784         }
 785
 786         lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
 787                                 lun->unpacked_lun);
 788         if (IS_ERR(lun_p)) {
 789                 pr_err("core_dev_add_lun() failed\n");
 790                 ret = PTR_ERR(lun_p);
 791                 goto out;
 792         }
 793
 794         if (tf->tf_ops.fabric_post_link) {
 795                 /*
 796                  * Call the optional fabric_post_link() to allow a
 797                  * fabric module to setup any additional state once
 798                  * core_dev_add_lun() has been called..
 799                  */
 800                 tf->tf_ops.fabric_post_link(se_tpg, lun);
 801         }
 802
 803         return 0;
 804 out:
 805         return ret;
 806 }
 807
 808 static int target_fabric_port_unlink(
 809         struct config_item *lun_ci,
 810         struct config_item *se_dev_ci)
 811 {
 812         struct se_lun *lun = container_of(to_config_group(lun_ci),
 813                                 struct se_lun, lun_group);
 814         struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
 815         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 816
 817         if (tf->tf_ops.fabric_pre_unlink) {
 818                 /*
 819                  * Call the optional fabric_pre_unlink() to allow a
 820                  * fabric module to release any additional stat before
 821                  * core_dev_del_lun() is called.
 822                 */
 823                 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
 824         }
 825
 826         core_dev_del_lun(se_tpg, lun->unpacked_lun);
 827         return 0;
 828 }
 829
 830 static struct configfs_item_operations target_fabric_port_item_ops = {
 831         .show_attribute         = target_fabric_port_attr_show,
 832         .store_attribute        = target_fabric_port_attr_store,
 833         .allow_link             = target_fabric_port_link,
 834         .drop_link              = target_fabric_port_unlink,
 835 };
 836
 837 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
 838
 839 /* End of tfc_tpg_port_cit */
 840
 841 /* Start of tfc_tpg_port_stat_cit */
 842
 843 static struct config_group *target_core_port_stat_mkdir(
 844         struct config_group *group,
 845         const char *name)
 846 {
 847         return ERR_PTR(-ENOSYS);
 848 }
 849
 850 static void target_core_port_stat_rmdir(
 851         struct config_group *group,
 852         struct config_item *item)
 853 {
 854         return;
 855 }
 856
 857 static struct configfs_group_operations target_fabric_port_stat_group_ops = {
 858         .make_group             = target_core_port_stat_mkdir,
 859         .drop_item              = target_core_port_stat_rmdir,
 860 };
 861
 862 TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
 863
 864 /* End of tfc_tpg_port_stat_cit */
 865
 866 /* Start of tfc_tpg_lun_cit */
 867
 868 static struct config_group *target_fabric_make_lun(
 869         struct config_group *group,
 870         const char *name)
 871 {
 872         struct se_lun *lun;
 873         struct se_portal_group *se_tpg = container_of(group,
 874                         struct se_portal_group, tpg_lun_group);
 875         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 876         struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
 877         unsigned long unpacked_lun;
 878         int errno;
 879
 880         if (strstr(name, "lun_") != name) {
 881                 pr_err("Unable to locate \'_\" in"
 882                                 " \"lun_$LUN_NUMBER\"\n");
 883                 return ERR_PTR(-EINVAL);
 884         }
 885         if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
 886                 return ERR_PTR(-EINVAL);
 887
 888         lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
 889         if (!lun)
 890                 return ERR_PTR(-EINVAL);
 891
 892         lun_cg = &lun->lun_group;
 893         lun_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
 894                                 GFP_KERNEL);
 895         if (!lun_cg->default_groups) {
 896                 pr_err("Unable to allocate lun_cg->default_groups\n");
 897                 return ERR_PTR(-ENOMEM);
 898         }
 899
 900         config_group_init_type_name(&lun->lun_group, name,
 901                         &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
 902         config_group_init_type_name(&lun->port_stat_grps.stat_group,
 903                         "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_port_stat_cit);
 904         lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
 905         lun_cg->default_groups[1] = NULL;
 906
 907         port_stat_grp = &lun->port_stat_grps.stat_group;
 908         port_stat_grp->default_groups =  kzalloc(sizeof(struct config_group) * 3,
 909                                 GFP_KERNEL);
 910         if (!port_stat_grp->default_groups) {
 911                 pr_err("Unable to allocate port_stat_grp->default_groups\n");
 912                 errno = -ENOMEM;
 913                 goto out;
 914         }
 915         target_stat_setup_port_default_groups(lun);
 916
 917         return &lun->lun_group;
 918 out:
 919         if (lun_cg)
 920                 kfree(lun_cg->default_groups);
 921         return ERR_PTR(errno);
 922 }
 923
 924 static void target_fabric_drop_lun(
 925         struct config_group *group,
 926         struct config_item *item)
 927 {
 928         struct se_lun *lun = container_of(to_config_group(item),
 929                                 struct se_lun, lun_group);
 930         struct config_item *df_item;
 931         struct config_group *lun_cg, *port_stat_grp;
 932         int i;
 933
 934         port_stat_grp = &lun->port_stat_grps.stat_group;
 935         for (i = 0; port_stat_grp->default_groups[i]; i++) {
 936                 df_item = &port_stat_grp->default_groups[i]->cg_item;
 937                 port_stat_grp->default_groups[i] = NULL;
 938                 config_item_put(df_item);
 939         }
 940         kfree(port_stat_grp->default_groups);
 941
 942         lun_cg = &lun->lun_group;
 943         for (i = 0; lun_cg->default_groups[i]; i++) {
 944                 df_item = &lun_cg->default_groups[i]->cg_item;
 945                 lun_cg->default_groups[i] = NULL;
 946                 config_item_put(df_item);
 947         }
 948         kfree(lun_cg->default_groups);
 949
 950         config_item_put(item);
 951 }
 952
 953 static struct configfs_group_operations target_fabric_lun_group_ops = {
 954         .make_group     = &target_fabric_make_lun,
 955         .drop_item      = &target_fabric_drop_lun,
 956 };
 957
 958 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
 959
 960 /* End of tfc_tpg_lun_cit */
 961
 962 /* Start of tfc_tpg_attrib_cit */
 963
 964 CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
 965
 966 static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
 967         .show_attribute         = target_fabric_tpg_attrib_attr_show,
 968         .store_attribute        = target_fabric_tpg_attrib_attr_store,
 969 };
 970
 971 TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
 972
 973 /* End of tfc_tpg_attrib_cit */
 974
 975 /* Start of tfc_tpg_param_cit */
 976
 977 CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
 978
 979 static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
 980         .show_attribute         = target_fabric_tpg_param_attr_show,
 981         .store_attribute        = target_fabric_tpg_param_attr_store,
 982 };
 983
 984 TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
 985
 986 /* End of tfc_tpg_param_cit */
 987
 988 /* Start of tfc_tpg_base_cit */
 989 /*
 990  * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
 991  */
 992 CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
 993
 994 static void target_fabric_tpg_release(struct config_item *item)
 995 {
 996         struct se_portal_group *se_tpg = container_of(to_config_group(item),
 997                         struct se_portal_group, tpg_group);
 998         struct se_wwn *wwn = se_tpg->se_tpg_wwn;
 999         struct target_fabric_configfs *tf = wwn->wwn_tf;
1000
1001         tf->tf_ops.fabric_drop_tpg(se_tpg);
1002 }
1003
1004 static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
1005         .release                = target_fabric_tpg_release,
1006         .show_attribute         = target_fabric_tpg_attr_show,
1007         .store_attribute        = target_fabric_tpg_attr_store,
1008 };
1009
1010 TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
1011
1012 /* End of tfc_tpg_base_cit */
1013
1014 /* Start of tfc_tpg_cit */
1015
1016 static struct config_group *target_fabric_make_tpg(
1017         struct config_group *group,
1018         const char *name)
1019 {
1020         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
1021         struct target_fabric_configfs *tf = wwn->wwn_tf;
1022         struct se_portal_group *se_tpg;
1023
1024         if (!tf->tf_ops.fabric_make_tpg) {
1025                 pr_err("tf->tf_ops.fabric_make_tpg is NULL\n");
1026                 return ERR_PTR(-ENOSYS);
1027         }
1028
1029         se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
1030         if (!se_tpg || IS_ERR(se_tpg))
1031                 return ERR_PTR(-EINVAL);
1032         /*
1033          * Setup default groups from pre-allocated se_tpg->tpg_default_groups
1034          */
1035         se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
1036         se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
1037         se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
1038         se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
1039         se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
1040         se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
1041         se_tpg->tpg_group.default_groups[5] = NULL;
1042
1043         config_group_init_type_name(&se_tpg->tpg_group, name,
1044                         &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
1045         config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
1046                         &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
1047         config_group_init_type_name(&se_tpg->tpg_np_group, "np",
1048                         &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
1049         config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
1050                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
1051         config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
1052                         &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
1053         config_group_init_type_name(&se_tpg->tpg_param_group, "param",
1054                         &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
1055
1056         return &se_tpg->tpg_group;
1057 }
1058
1059 static void target_fabric_drop_tpg(
1060         struct config_group *group,
1061         struct config_item *item)
1062 {
1063         struct se_portal_group *se_tpg = container_of(to_config_group(item),
1064                                 struct se_portal_group, tpg_group);
1065         struct config_group *tpg_cg = &se_tpg->tpg_group;
1066         struct config_item *df_item;
1067         int i;
1068         /*
1069          * Release default groups, but do not release tpg_cg->default_groups
1070          * memory as it is statically allocated at se_tpg->tpg_default_groups.
1071          */
1072         for (i = 0; tpg_cg->default_groups[i]; i++) {
1073                 df_item = &tpg_cg->default_groups[i]->cg_item;
1074                 tpg_cg->default_groups[i] = NULL;
1075                 config_item_put(df_item);
1076         }
1077
1078         config_item_put(item);
1079 }
1080
1081 static void target_fabric_release_wwn(struct config_item *item)
1082 {
1083         struct se_wwn *wwn = container_of(to_config_group(item),
1084                                 struct se_wwn, wwn_group);
1085         struct target_fabric_configfs *tf = wwn->wwn_tf;
1086
1087         tf->tf_ops.fabric_drop_wwn(wwn);
1088 }
1089
1090 static struct configfs_item_operations target_fabric_tpg_item_ops = {
1091         .release        = target_fabric_release_wwn,
1092 };
1093
1094 static struct configfs_group_operations target_fabric_tpg_group_ops = {
1095         .make_group     = target_fabric_make_tpg,
1096         .drop_item      = target_fabric_drop_tpg,
1097 };
1098
1099 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
1100                 NULL);
1101
1102 /* End of tfc_tpg_cit */
1103
1104 /* Start of tfc_wwn_fabric_stats_cit */
1105 /*
1106  * This is used as a placeholder for struct se_wwn->fabric_stat_group
1107  * to allow fabrics access to ->fabric_stat_group->default_groups[]
1108  */
1109 TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
1110
1111 /* End of tfc_wwn_fabric_stats_cit */
1112
1113 /* Start of tfc_wwn_cit */
1114
1115 static struct config_group *target_fabric_make_wwn(
1116         struct config_group *group,
1117         const char *name)
1118 {
1119         struct target_fabric_configfs *tf = container_of(group,
1120                                 struct target_fabric_configfs, tf_group);
1121         struct se_wwn *wwn;
1122
1123         if (!tf->tf_ops.fabric_make_wwn) {
1124                 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
1125                 return ERR_PTR(-ENOSYS);
1126         }
1127
1128         wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
1129         if (!wwn || IS_ERR(wwn))
1130                 return ERR_PTR(-EINVAL);
1131
1132         wwn->wwn_tf = tf;
1133         /*
1134          * Setup default groups from pre-allocated wwn->wwn_default_groups
1135          */
1136         wwn->wwn_group.default_groups = wwn->wwn_default_groups;
1137         wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
1138         wwn->wwn_group.default_groups[1] = NULL;
1139
1140         config_group_init_type_name(&wwn->wwn_group, name,
1141                         &TF_CIT_TMPL(tf)->tfc_tpg_cit);
1142         config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
1143                         &TF_CIT_TMPL(tf)->tfc_wwn_fabric_stats_cit);
1144
1145         return &wwn->wwn_group;
1146 }
1147
1148 static void target_fabric_drop_wwn(
1149         struct config_group *group,
1150         struct config_item *item)
1151 {
1152         struct se_wwn *wwn = container_of(to_config_group(item),
1153                                 struct se_wwn, wwn_group);
1154         struct config_item *df_item;
1155         struct config_group *cg = &wwn->wwn_group;
1156         int i;
1157
1158         for (i = 0; cg->default_groups[i]; i++) {
1159                 df_item = &cg->default_groups[i]->cg_item;
1160                 cg->default_groups[i] = NULL;
1161                 config_item_put(df_item);
1162         }
1163
1164         config_item_put(item);
1165 }
1166
1167 static struct configfs_group_operations target_fabric_wwn_group_ops = {
1168         .make_group     = target_fabric_make_wwn,
1169         .drop_item      = target_fabric_drop_wwn,
1170 };
1171 /*
1172  * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
1173  */
1174 CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
1175
1176 static struct configfs_item_operations target_fabric_wwn_item_ops = {
1177         .show_attribute         = target_fabric_wwn_attr_show,
1178         .store_attribute        = target_fabric_wwn_attr_store,
1179 };
1180
1181 TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
1182
1183 /* End of tfc_wwn_cit */
1184
1185 /* Start of tfc_discovery_cit */
1186
1187 CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
1188                 tf_disc_group);
1189
1190 static struct configfs_item_operations target_fabric_discovery_item_ops = {
1191         .show_attribute         = target_fabric_discovery_attr_show,
1192         .store_attribute        = target_fabric_discovery_attr_store,
1193 };
1194
1195 TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
1196
1197 /* End of tfc_discovery_cit */
1198
1199 int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1200 {
1201         target_fabric_setup_discovery_cit(tf);
1202         target_fabric_setup_wwn_cit(tf);
1203         target_fabric_setup_wwn_fabric_stats_cit(tf);
1204         target_fabric_setup_tpg_cit(tf);
1205         target_fabric_setup_tpg_base_cit(tf);
1206         target_fabric_setup_tpg_port_cit(tf);
1207         target_fabric_setup_tpg_port_stat_cit(tf);
1208         target_fabric_setup_tpg_lun_cit(tf);
1209         target_fabric_setup_tpg_np_cit(tf);
1210         target_fabric_setup_tpg_np_base_cit(tf);
1211         target_fabric_setup_tpg_attrib_cit(tf);
1212         target_fabric_setup_tpg_param_cit(tf);
1213         target_fabric_setup_tpg_nacl_cit(tf);
1214         target_fabric_setup_tpg_nacl_base_cit(tf);
1215         target_fabric_setup_tpg_nacl_attrib_cit(tf);
1216         target_fabric_setup_tpg_nacl_auth_cit(tf);
1217         target_fabric_setup_tpg_nacl_param_cit(tf);
1218         target_fabric_setup_tpg_nacl_stat_cit(tf);
1219         target_fabric_setup_tpg_mappedlun_cit(tf);
1220         target_fabric_setup_tpg_mappedlun_stat_cit(tf);
1221
1222         return 0;
1223 }