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