drivers/target/target_core_fabric_configfs.c

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