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 2010-2012 RisingTide Systems LLC.
   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
 193         if (strict_strtoul(page, 0, &op))
 194                 return -EINVAL;
 195
 196         if ((op != 1) && (op != 0))
 197                 return -EINVAL;
 198
 199         core_update_device_list_access(lacl->mapped_lun, (op) ?
 200                         TRANSPORT_LUNFLAGS_READ_ONLY :
 201                         TRANSPORT_LUNFLAGS_READ_WRITE,
 202                         lacl->se_lun_nacl);
 203
 204         pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
 205                 " Mapped LUN: %u Write Protect bit to %s\n",
 206                 se_tpg->se_tpg_tfo->get_fabric_name(),
 207                 lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
 208
 209         return count;
 210
 211 }
 212
 213 TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
 214
 215 CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
 216
 217 static void target_fabric_mappedlun_release(struct config_item *item)
 218 {
 219         struct se_lun_acl *lacl = container_of(to_config_group(item),
 220                                 struct se_lun_acl, se_lun_group);
 221         struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
 222
 223         core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
 224 }
 225
 226 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
 227         &target_fabric_mappedlun_write_protect.attr,
 228         NULL,
 229 };
 230
 231 static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
 232         .release                = target_fabric_mappedlun_release,
 233         .show_attribute         = target_fabric_mappedlun_attr_show,
 234         .store_attribute        = target_fabric_mappedlun_attr_store,
 235         .allow_link             = target_fabric_mappedlun_link,
 236         .drop_link              = target_fabric_mappedlun_unlink,
 237 };
 238
 239 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
 240                 target_fabric_mappedlun_attrs);
 241
 242 /* End of tfc_tpg_mappedlun_cit */
 243
 244 /* Start of tfc_tpg_mappedlun_port_cit */
 245
 246 static struct config_group *target_core_mappedlun_stat_mkdir(
 247         struct config_group *group,
 248         const char *name)
 249 {
 250         return ERR_PTR(-ENOSYS);
 251 }
 252
 253 static void target_core_mappedlun_stat_rmdir(
 254         struct config_group *group,
 255         struct config_item *item)
 256 {
 257         return;
 258 }
 259
 260 static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
 261         .make_group             = target_core_mappedlun_stat_mkdir,
 262         .drop_item              = target_core_mappedlun_stat_rmdir,
 263 };
 264
 265 TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
 266                 NULL);
 267
 268 /* End of tfc_tpg_mappedlun_port_cit */
 269
 270 /* Start of tfc_tpg_nacl_attrib_cit */
 271
 272 CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
 273
 274 static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
 275         .show_attribute         = target_fabric_nacl_attrib_attr_show,
 276         .store_attribute        = target_fabric_nacl_attrib_attr_store,
 277 };
 278
 279 TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
 280
 281 /* End of tfc_tpg_nacl_attrib_cit */
 282
 283 /* Start of tfc_tpg_nacl_auth_cit */
 284
 285 CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
 286
 287 static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
 288         .show_attribute         = target_fabric_nacl_auth_attr_show,
 289         .store_attribute        = target_fabric_nacl_auth_attr_store,
 290 };
 291
 292 TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
 293
 294 /* End of tfc_tpg_nacl_auth_cit */
 295
 296 /* Start of tfc_tpg_nacl_param_cit */
 297
 298 CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
 299
 300 static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
 301         .show_attribute         = target_fabric_nacl_param_attr_show,
 302         .store_attribute        = target_fabric_nacl_param_attr_store,
 303 };
 304
 305 TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
 306
 307 /* End of tfc_tpg_nacl_param_cit */
 308
 309 /* Start of tfc_tpg_nacl_base_cit */
 310
 311 CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
 312
 313 static struct config_group *target_fabric_make_mappedlun(
 314         struct config_group *group,
 315         const char *name)
 316 {
 317         struct se_node_acl *se_nacl = container_of(group,
 318                         struct se_node_acl, acl_group);
 319         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 320         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 321         struct se_lun_acl *lacl;
 322         struct config_item *acl_ci;
 323         struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
 324         char *buf;
 325         unsigned long mapped_lun;
 326         int ret = 0;
 327
 328         acl_ci = &group->cg_item;
 329         if (!acl_ci) {
 330                 pr_err("Unable to locatel acl_ci\n");
 331                 return NULL;
 332         }
 333
 334         buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
 335         if (!buf) {
 336                 pr_err("Unable to allocate memory for name buf\n");
 337                 return ERR_PTR(-ENOMEM);
 338         }
 339         snprintf(buf, strlen(name) + 1, "%s", name);
 340         /*
 341          * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
 342          */
 343         if (strstr(buf, "lun_") != buf) {
 344                 pr_err("Unable to locate \"lun_\" from buf: %s"
 345                         " name: %s\n", buf, name);
 346                 ret = -EINVAL;
 347                 goto out;
 348         }
 349         /*
 350          * Determine the Mapped LUN value.  This is what the SCSI Initiator
 351          * Port will actually see.
 352          */
 353         if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
 354                 ret = -EINVAL;
 355                 goto out;
 356         }
 357         if (mapped_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
 358                 pr_err("Mapped LUN: %lu exceeds TRANSPORT_MAX_LUNS_PER_TPG"
 359                         "-1: %u for Target Portal Group: %u\n", mapped_lun,
 360                         TRANSPORT_MAX_LUNS_PER_TPG-1,
 361                         se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
 362                 ret = -EINVAL;
 363                 goto out;
 364         }
 365
 366         lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
 367                         mapped_lun, &ret);
 368         if (!lacl) {
 369                 ret = -EINVAL;
 370                 goto out;
 371         }
 372
 373         lacl_cg = &lacl->se_lun_group;
 374         lacl_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 375                                 GFP_KERNEL);
 376         if (!lacl_cg->default_groups) {
 377                 pr_err("Unable to allocate lacl_cg->default_groups\n");
 378                 ret = -ENOMEM;
 379                 goto out;
 380         }
 381
 382         config_group_init_type_name(&lacl->se_lun_group, name,
 383                         &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
 384         config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
 385                         "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_stat_cit);
 386         lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
 387         lacl_cg->default_groups[1] = NULL;
 388
 389         ml_stat_grp = &lacl->ml_stat_grps.stat_group;
 390         ml_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 3,
 391                                 GFP_KERNEL);
 392         if (!ml_stat_grp->default_groups) {
 393                 pr_err("Unable to allocate ml_stat_grp->default_groups\n");
 394                 ret = -ENOMEM;
 395                 goto out;
 396         }
 397         target_stat_setup_mappedlun_default_groups(lacl);
 398
 399         kfree(buf);
 400         return &lacl->se_lun_group;
 401 out:
 402         if (lacl_cg)
 403                 kfree(lacl_cg->default_groups);
 404         kfree(buf);
 405         return ERR_PTR(ret);
 406 }
 407
 408 static void target_fabric_drop_mappedlun(
 409         struct config_group *group,
 410         struct config_item *item)
 411 {
 412         struct se_lun_acl *lacl = container_of(to_config_group(item),
 413                         struct se_lun_acl, se_lun_group);
 414         struct config_item *df_item;
 415         struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
 416         int i;
 417
 418         ml_stat_grp = &lacl->ml_stat_grps.stat_group;
 419         for (i = 0; ml_stat_grp->default_groups[i]; i++) {
 420                 df_item = &ml_stat_grp->default_groups[i]->cg_item;
 421                 ml_stat_grp->default_groups[i] = NULL;
 422                 config_item_put(df_item);
 423         }
 424         kfree(ml_stat_grp->default_groups);
 425
 426         lacl_cg = &lacl->se_lun_group;
 427         for (i = 0; lacl_cg->default_groups[i]; i++) {
 428                 df_item = &lacl_cg->default_groups[i]->cg_item;
 429                 lacl_cg->default_groups[i] = NULL;
 430                 config_item_put(df_item);
 431         }
 432         kfree(lacl_cg->default_groups);
 433
 434         config_item_put(item);
 435 }
 436
 437 static void target_fabric_nacl_base_release(struct config_item *item)
 438 {
 439         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 440                         struct se_node_acl, acl_group);
 441         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 442         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 443
 444         tf->tf_ops.fabric_drop_nodeacl(se_nacl);
 445 }
 446
 447 static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
 448         .release                = target_fabric_nacl_base_release,
 449         .show_attribute         = target_fabric_nacl_base_attr_show,
 450         .store_attribute        = target_fabric_nacl_base_attr_store,
 451 };
 452
 453 static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
 454         .make_group             = target_fabric_make_mappedlun,
 455         .drop_item              = target_fabric_drop_mappedlun,
 456 };
 457
 458 TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
 459                 &target_fabric_nacl_base_group_ops, NULL);
 460
 461 /* End of tfc_tpg_nacl_base_cit */
 462
 463 /* Start of tfc_node_fabric_stats_cit */
 464 /*
 465  * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
 466  * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
 467  */
 468 TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
 469
 470 /* End of tfc_wwn_fabric_stats_cit */
 471
 472 /* Start of tfc_tpg_nacl_cit */
 473
 474 static struct config_group *target_fabric_make_nodeacl(
 475         struct config_group *group,
 476         const char *name)
 477 {
 478         struct se_portal_group *se_tpg = container_of(group,
 479                         struct se_portal_group, tpg_acl_group);
 480         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 481         struct se_node_acl *se_nacl;
 482         struct config_group *nacl_cg;
 483
 484         if (!tf->tf_ops.fabric_make_nodeacl) {
 485                 pr_err("tf->tf_ops.fabric_make_nodeacl is NULL\n");
 486                 return ERR_PTR(-ENOSYS);
 487         }
 488
 489         se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
 490         if (IS_ERR(se_nacl))
 491                 return ERR_CAST(se_nacl);
 492
 493         nacl_cg = &se_nacl->acl_group;
 494         nacl_cg->default_groups = se_nacl->acl_default_groups;
 495         nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
 496         nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
 497         nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
 498         nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
 499         nacl_cg->default_groups[4] = NULL;
 500
 501         config_group_init_type_name(&se_nacl->acl_group, name,
 502                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
 503         config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
 504                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
 505         config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
 506                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
 507         config_group_init_type_name(&se_nacl->acl_param_group, "param",
 508                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
 509         config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
 510                         "fabric_statistics",
 511                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_stat_cit);
 512
 513         return &se_nacl->acl_group;
 514 }
 515
 516 static void target_fabric_drop_nodeacl(
 517         struct config_group *group,
 518         struct config_item *item)
 519 {
 520         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 521                         struct se_node_acl, acl_group);
 522         struct config_item *df_item;
 523         struct config_group *nacl_cg;
 524         int i;
 525
 526         nacl_cg = &se_nacl->acl_group;
 527         for (i = 0; nacl_cg->default_groups[i]; i++) {
 528                 df_item = &nacl_cg->default_groups[i]->cg_item;
 529                 nacl_cg->default_groups[i] = NULL;
 530                 config_item_put(df_item);
 531         }
 532         /*
 533          * struct se_node_acl free is done in target_fabric_nacl_base_release()
 534          */
 535         config_item_put(item);
 536 }
 537
 538 static struct configfs_group_operations target_fabric_nacl_group_ops = {
 539         .make_group     = target_fabric_make_nodeacl,
 540         .drop_item      = target_fabric_drop_nodeacl,
 541 };
 542
 543 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
 544
 545 /* End of tfc_tpg_nacl_cit */
 546
 547 /* Start of tfc_tpg_np_base_cit */
 548
 549 CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
 550
 551 static void target_fabric_np_base_release(struct config_item *item)
 552 {
 553         struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
 554                                 struct se_tpg_np, tpg_np_group);
 555         struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
 556         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 557
 558         tf->tf_ops.fabric_drop_np(se_tpg_np);
 559 }
 560
 561 static struct configfs_item_operations target_fabric_np_base_item_ops = {
 562         .release                = target_fabric_np_base_release,
 563         .show_attribute         = target_fabric_np_base_attr_show,
 564         .store_attribute        = target_fabric_np_base_attr_store,
 565 };
 566
 567 TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
 568
 569 /* End of tfc_tpg_np_base_cit */
 570
 571 /* Start of tfc_tpg_np_cit */
 572
 573 static struct config_group *target_fabric_make_np(
 574         struct config_group *group,
 575         const char *name)
 576 {
 577         struct se_portal_group *se_tpg = container_of(group,
 578                                 struct se_portal_group, tpg_np_group);
 579         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 580         struct se_tpg_np *se_tpg_np;
 581
 582         if (!tf->tf_ops.fabric_make_np) {
 583                 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
 584                 return ERR_PTR(-ENOSYS);
 585         }
 586
 587         se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
 588         if (!se_tpg_np || IS_ERR(se_tpg_np))
 589                 return ERR_PTR(-EINVAL);
 590
 591         se_tpg_np->tpg_np_parent = se_tpg;
 592         config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
 593                         &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
 594
 595         return &se_tpg_np->tpg_np_group;
 596 }
 597
 598 static void target_fabric_drop_np(
 599         struct config_group *group,
 600         struct config_item *item)
 601 {
 602         /*
 603          * struct se_tpg_np is released via target_fabric_np_base_release()
 604          */
 605         config_item_put(item);
 606 }
 607
 608 static struct configfs_group_operations target_fabric_np_group_ops = {
 609         .make_group     = &target_fabric_make_np,
 610         .drop_item      = &target_fabric_drop_np,
 611 };
 612
 613 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
 614
 615 /* End of tfc_tpg_np_cit */
 616
 617 /* Start of tfc_tpg_port_cit */
 618
 619 CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
 620 #define TCM_PORT_ATTR(_name, _mode)                                     \
 621 static struct target_fabric_port_attribute target_fabric_port_##_name = \
 622         __CONFIGFS_EATTR(_name, _mode,                                  \
 623         target_fabric_port_show_attr_##_name,                           \
 624         target_fabric_port_store_attr_##_name);
 625
 626 #define TCM_PORT_ATTOR_RO(_name)                                        \
 627         __CONFIGFS_EATTR_RO(_name,                                      \
 628         target_fabric_port_show_attr_##_name);
 629
 630 /*
 631  * alua_tg_pt_gp
 632  */
 633 static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
 634         struct se_lun *lun,
 635         char *page)
 636 {
 637         if (!lun || !lun->lun_sep)
 638                 return -ENODEV;
 639
 640         return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
 641 }
 642
 643 static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
 644         struct se_lun *lun,
 645         const char *page,
 646         size_t count)
 647 {
 648         if (!lun || !lun->lun_sep)
 649                 return -ENODEV;
 650
 651         return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
 652 }
 653
 654 TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
 655
 656 /*
 657  * alua_tg_pt_offline
 658  */
 659 static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
 660         struct se_lun *lun,
 661         char *page)
 662 {
 663         if (!lun || !lun->lun_sep)
 664                 return -ENODEV;
 665
 666         return core_alua_show_offline_bit(lun, page);
 667 }
 668
 669 static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
 670         struct se_lun *lun,
 671         const char *page,
 672         size_t count)
 673 {
 674         if (!lun || !lun->lun_sep)
 675                 return -ENODEV;
 676
 677         return core_alua_store_offline_bit(lun, page, count);
 678 }
 679
 680 TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
 681
 682 /*
 683  * alua_tg_pt_status
 684  */
 685 static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
 686         struct se_lun *lun,
 687         char *page)
 688 {
 689         if (!lun || !lun->lun_sep)
 690                 return -ENODEV;
 691
 692         return core_alua_show_secondary_status(lun, page);
 693 }
 694
 695 static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
 696         struct se_lun *lun,
 697         const char *page,
 698         size_t count)
 699 {
 700         if (!lun || !lun->lun_sep)
 701                 return -ENODEV;
 702
 703         return core_alua_store_secondary_status(lun, page, count);
 704 }
 705
 706 TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
 707
 708 /*
 709  * alua_tg_pt_write_md
 710  */
 711 static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
 712         struct se_lun *lun,
 713         char *page)
 714 {
 715         if (!lun || !lun->lun_sep)
 716                 return -ENODEV;
 717
 718         return core_alua_show_secondary_write_metadata(lun, page);
 719 }
 720
 721 static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
 722         struct se_lun *lun,
 723         const char *page,
 724         size_t count)
 725 {
 726         if (!lun || !lun->lun_sep)
 727                 return -ENODEV;
 728
 729         return core_alua_store_secondary_write_metadata(lun, page, count);
 730 }
 731
 732 TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
 733
 734
 735 static struct configfs_attribute *target_fabric_port_attrs[] = {
 736         &target_fabric_port_alua_tg_pt_gp.attr,
 737         &target_fabric_port_alua_tg_pt_offline.attr,
 738         &target_fabric_port_alua_tg_pt_status.attr,
 739         &target_fabric_port_alua_tg_pt_write_md.attr,
 740         NULL,
 741 };
 742
 743 CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
 744
 745 static int target_fabric_port_link(
 746         struct config_item *lun_ci,
 747         struct config_item *se_dev_ci)
 748 {
 749         struct config_item *tpg_ci;
 750         struct se_lun *lun = container_of(to_config_group(lun_ci),
 751                                 struct se_lun, lun_group);
 752         struct se_lun *lun_p;
 753         struct se_portal_group *se_tpg;
 754         struct se_device *dev =
 755                 container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
 756         struct target_fabric_configfs *tf;
 757         int ret;
 758
 759         if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
 760                 pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
 761                         " %p to struct se_device: %p\n", se_dev_ci, dev);
 762                 return -EFAULT;
 763         }
 764
 765         if (!(dev->dev_flags & DF_CONFIGURED)) {
 766                 pr_err("se_device not configured yet, cannot port link\n");
 767                 return -ENODEV;
 768         }
 769
 770         tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
 771         se_tpg = container_of(to_config_group(tpg_ci),
 772                                 struct se_portal_group, tpg_group);
 773         tf = se_tpg->se_tpg_wwn->wwn_tf;
 774
 775         if (lun->lun_se_dev !=  NULL) {
 776                 pr_err("Port Symlink already exists\n");
 777                 return -EEXIST;
 778         }
 779
 780         lun_p = core_dev_add_lun(se_tpg, dev, lun->unpacked_lun);
 781         if (IS_ERR(lun_p)) {
 782                 pr_err("core_dev_add_lun() failed\n");
 783                 ret = PTR_ERR(lun_p);
 784                 goto out;
 785         }
 786
 787         if (tf->tf_ops.fabric_post_link) {
 788                 /*
 789                  * Call the optional fabric_post_link() to allow a
 790                  * fabric module to setup any additional state once
 791                  * core_dev_add_lun() has been called..
 792                  */
 793                 tf->tf_ops.fabric_post_link(se_tpg, lun);
 794         }
 795
 796         return 0;
 797 out:
 798         return ret;
 799 }
 800
 801 static int target_fabric_port_unlink(
 802         struct config_item *lun_ci,
 803         struct config_item *se_dev_ci)
 804 {
 805         struct se_lun *lun = container_of(to_config_group(lun_ci),
 806                                 struct se_lun, lun_group);
 807         struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
 808         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 809
 810         if (tf->tf_ops.fabric_pre_unlink) {
 811                 /*
 812                  * Call the optional fabric_pre_unlink() to allow a
 813                  * fabric module to release any additional stat before
 814                  * core_dev_del_lun() is called.
 815                 */
 816                 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
 817         }
 818
 819         core_dev_del_lun(se_tpg, lun->unpacked_lun);
 820         return 0;
 821 }
 822
 823 static struct configfs_item_operations target_fabric_port_item_ops = {
 824         .show_attribute         = target_fabric_port_attr_show,
 825         .store_attribute        = target_fabric_port_attr_store,
 826         .allow_link             = target_fabric_port_link,
 827         .drop_link              = target_fabric_port_unlink,
 828 };
 829
 830 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
 831
 832 /* End of tfc_tpg_port_cit */
 833
 834 /* Start of tfc_tpg_port_stat_cit */
 835
 836 static struct config_group *target_core_port_stat_mkdir(
 837         struct config_group *group,
 838         const char *name)
 839 {
 840         return ERR_PTR(-ENOSYS);
 841 }
 842
 843 static void target_core_port_stat_rmdir(
 844         struct config_group *group,
 845         struct config_item *item)
 846 {
 847         return;
 848 }
 849
 850 static struct configfs_group_operations target_fabric_port_stat_group_ops = {
 851         .make_group             = target_core_port_stat_mkdir,
 852         .drop_item              = target_core_port_stat_rmdir,
 853 };
 854
 855 TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
 856
 857 /* End of tfc_tpg_port_stat_cit */
 858
 859 /* Start of tfc_tpg_lun_cit */
 860
 861 static struct config_group *target_fabric_make_lun(
 862         struct config_group *group,
 863         const char *name)
 864 {
 865         struct se_lun *lun;
 866         struct se_portal_group *se_tpg = container_of(group,
 867                         struct se_portal_group, tpg_lun_group);
 868         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 869         struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
 870         unsigned long unpacked_lun;
 871         int errno;
 872
 873         if (strstr(name, "lun_") != name) {
 874                 pr_err("Unable to locate \'_\" in"
 875                                 " \"lun_$LUN_NUMBER\"\n");
 876                 return ERR_PTR(-EINVAL);
 877         }
 878         if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
 879                 return ERR_PTR(-EINVAL);
 880
 881         lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
 882         if (!lun)
 883                 return ERR_PTR(-EINVAL);
 884
 885         lun_cg = &lun->lun_group;
 886         lun_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 887                                 GFP_KERNEL);
 888         if (!lun_cg->default_groups) {
 889                 pr_err("Unable to allocate lun_cg->default_groups\n");
 890                 return ERR_PTR(-ENOMEM);
 891         }
 892
 893         config_group_init_type_name(&lun->lun_group, name,
 894                         &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
 895         config_group_init_type_name(&lun->port_stat_grps.stat_group,
 896                         "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_port_stat_cit);
 897         lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
 898         lun_cg->default_groups[1] = NULL;
 899
 900         port_stat_grp = &lun->port_stat_grps.stat_group;
 901         port_stat_grp->default_groups =  kzalloc(sizeof(struct config_group) * 3,
 902                                 GFP_KERNEL);
 903         if (!port_stat_grp->default_groups) {
 904                 pr_err("Unable to allocate port_stat_grp->default_groups\n");
 905                 errno = -ENOMEM;
 906                 goto out;
 907         }
 908         target_stat_setup_port_default_groups(lun);
 909
 910         return &lun->lun_group;
 911 out:
 912         if (lun_cg)
 913                 kfree(lun_cg->default_groups);
 914         return ERR_PTR(errno);
 915 }
 916
 917 static void target_fabric_drop_lun(
 918         struct config_group *group,
 919         struct config_item *item)
 920 {
 921         struct se_lun *lun = container_of(to_config_group(item),
 922                                 struct se_lun, lun_group);
 923         struct config_item *df_item;
 924         struct config_group *lun_cg, *port_stat_grp;
 925         int i;
 926
 927         port_stat_grp = &lun->port_stat_grps.stat_group;
 928         for (i = 0; port_stat_grp->default_groups[i]; i++) {
 929                 df_item = &port_stat_grp->default_groups[i]->cg_item;
 930                 port_stat_grp->default_groups[i] = NULL;
 931                 config_item_put(df_item);
 932         }
 933         kfree(port_stat_grp->default_groups);
 934
 935         lun_cg = &lun->lun_group;
 936         for (i = 0; lun_cg->default_groups[i]; i++) {
 937                 df_item = &lun_cg->default_groups[i]->cg_item;
 938                 lun_cg->default_groups[i] = NULL;
 939                 config_item_put(df_item);
 940         }
 941         kfree(lun_cg->default_groups);
 942
 943         config_item_put(item);
 944 }
 945
 946 static struct configfs_group_operations target_fabric_lun_group_ops = {
 947         .make_group     = &target_fabric_make_lun,
 948         .drop_item      = &target_fabric_drop_lun,
 949 };
 950
 951 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
 952
 953 /* End of tfc_tpg_lun_cit */
 954
 955 /* Start of tfc_tpg_attrib_cit */
 956
 957 CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
 958
 959 static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
 960         .show_attribute         = target_fabric_tpg_attrib_attr_show,
 961         .store_attribute        = target_fabric_tpg_attrib_attr_store,
 962 };
 963
 964 TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
 965
 966 /* End of tfc_tpg_attrib_cit */
 967
 968 /* Start of tfc_tpg_auth_cit */
 969
 970 CONFIGFS_EATTR_OPS(target_fabric_tpg_auth, se_portal_group, tpg_auth_group);
 971
 972 static struct configfs_item_operations target_fabric_tpg_auth_item_ops = {
 973         .show_attribute         = target_fabric_tpg_auth_attr_show,
 974         .store_attribute        = target_fabric_tpg_auth_attr_store,
 975 };
 976
 977 TF_CIT_SETUP(tpg_auth, &target_fabric_tpg_auth_item_ops, NULL, NULL);
 978
 979 /* End of tfc_tpg_attrib_cit */
 980
 981 /* Start of tfc_tpg_param_cit */
 982
 983 CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
 984
 985 static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
 986         .show_attribute         = target_fabric_tpg_param_attr_show,
 987         .store_attribute        = target_fabric_tpg_param_attr_store,
 988 };
 989
 990 TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
 991
 992 /* End of tfc_tpg_param_cit */
 993
 994 /* Start of tfc_tpg_base_cit */
 995 /*
 996  * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
 997  */
 998 CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
 999
1000 static void target_fabric_tpg_release(struct config_item *item)
1001 {
1002         struct se_portal_group *se_tpg = container_of(to_config_group(item),
1003                         struct se_portal_group, tpg_group);
1004         struct se_wwn *wwn = se_tpg->se_tpg_wwn;
1005         struct target_fabric_configfs *tf = wwn->wwn_tf;
1006
1007         tf->tf_ops.fabric_drop_tpg(se_tpg);
1008 }
1009
1010 static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
1011         .release                = target_fabric_tpg_release,
1012         .show_attribute         = target_fabric_tpg_attr_show,
1013         .store_attribute        = target_fabric_tpg_attr_store,
1014 };
1015
1016 TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
1017
1018 /* End of tfc_tpg_base_cit */
1019
1020 /* Start of tfc_tpg_cit */
1021
1022 static struct config_group *target_fabric_make_tpg(
1023         struct config_group *group,
1024         const char *name)
1025 {
1026         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
1027         struct target_fabric_configfs *tf = wwn->wwn_tf;
1028         struct se_portal_group *se_tpg;
1029
1030         if (!tf->tf_ops.fabric_make_tpg) {
1031                 pr_err("tf->tf_ops.fabric_make_tpg is NULL\n");
1032                 return ERR_PTR(-ENOSYS);
1033         }
1034
1035         se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
1036         if (!se_tpg || IS_ERR(se_tpg))
1037                 return ERR_PTR(-EINVAL);
1038         /*
1039          * Setup default groups from pre-allocated se_tpg->tpg_default_groups
1040          */
1041         se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
1042         se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
1043         se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
1044         se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
1045         se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
1046         se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_auth_group;
1047         se_tpg->tpg_group.default_groups[5] = &se_tpg->tpg_param_group;
1048         se_tpg->tpg_group.default_groups[6] = NULL;
1049
1050         config_group_init_type_name(&se_tpg->tpg_group, name,
1051                         &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
1052         config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
1053                         &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
1054         config_group_init_type_name(&se_tpg->tpg_np_group, "np",
1055                         &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
1056         config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
1057                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
1058         config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
1059                         &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
1060         config_group_init_type_name(&se_tpg->tpg_auth_group, "auth",
1061                         &TF_CIT_TMPL(tf)->tfc_tpg_auth_cit);
1062         config_group_init_type_name(&se_tpg->tpg_param_group, "param",
1063                         &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
1064
1065         return &se_tpg->tpg_group;
1066 }
1067
1068 static void target_fabric_drop_tpg(
1069         struct config_group *group,
1070         struct config_item *item)
1071 {
1072         struct se_portal_group *se_tpg = container_of(to_config_group(item),
1073                                 struct se_portal_group, tpg_group);
1074         struct config_group *tpg_cg = &se_tpg->tpg_group;
1075         struct config_item *df_item;
1076         int i;
1077         /*
1078          * Release default groups, but do not release tpg_cg->default_groups
1079          * memory as it is statically allocated at se_tpg->tpg_default_groups.
1080          */
1081         for (i = 0; tpg_cg->default_groups[i]; i++) {
1082                 df_item = &tpg_cg->default_groups[i]->cg_item;
1083                 tpg_cg->default_groups[i] = NULL;
1084                 config_item_put(df_item);
1085         }
1086
1087         config_item_put(item);
1088 }
1089
1090 static void target_fabric_release_wwn(struct config_item *item)
1091 {
1092         struct se_wwn *wwn = container_of(to_config_group(item),
1093                                 struct se_wwn, wwn_group);
1094         struct target_fabric_configfs *tf = wwn->wwn_tf;
1095
1096         tf->tf_ops.fabric_drop_wwn(wwn);
1097 }
1098
1099 static struct configfs_item_operations target_fabric_tpg_item_ops = {
1100         .release        = target_fabric_release_wwn,
1101 };
1102
1103 static struct configfs_group_operations target_fabric_tpg_group_ops = {
1104         .make_group     = target_fabric_make_tpg,
1105         .drop_item      = target_fabric_drop_tpg,
1106 };
1107
1108 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
1109                 NULL);
1110
1111 /* End of tfc_tpg_cit */
1112
1113 /* Start of tfc_wwn_fabric_stats_cit */
1114 /*
1115  * This is used as a placeholder for struct se_wwn->fabric_stat_group
1116  * to allow fabrics access to ->fabric_stat_group->default_groups[]
1117  */
1118 TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
1119
1120 /* End of tfc_wwn_fabric_stats_cit */
1121
1122 /* Start of tfc_wwn_cit */
1123
1124 static struct config_group *target_fabric_make_wwn(
1125         struct config_group *group,
1126         const char *name)
1127 {
1128         struct target_fabric_configfs *tf = container_of(group,
1129                                 struct target_fabric_configfs, tf_group);
1130         struct se_wwn *wwn;
1131
1132         if (!tf->tf_ops.fabric_make_wwn) {
1133                 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
1134                 return ERR_PTR(-ENOSYS);
1135         }
1136
1137         wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
1138         if (!wwn || IS_ERR(wwn))
1139                 return ERR_PTR(-EINVAL);
1140
1141         wwn->wwn_tf = tf;
1142         /*
1143          * Setup default groups from pre-allocated wwn->wwn_default_groups
1144          */
1145         wwn->wwn_group.default_groups = wwn->wwn_default_groups;
1146         wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
1147         wwn->wwn_group.default_groups[1] = NULL;
1148
1149         config_group_init_type_name(&wwn->wwn_group, name,
1150                         &TF_CIT_TMPL(tf)->tfc_tpg_cit);
1151         config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
1152                         &TF_CIT_TMPL(tf)->tfc_wwn_fabric_stats_cit);
1153
1154         return &wwn->wwn_group;
1155 }
1156
1157 static void target_fabric_drop_wwn(
1158         struct config_group *group,
1159         struct config_item *item)
1160 {
1161         struct se_wwn *wwn = container_of(to_config_group(item),
1162                                 struct se_wwn, wwn_group);
1163         struct config_item *df_item;
1164         struct config_group *cg = &wwn->wwn_group;
1165         int i;
1166
1167         for (i = 0; cg->default_groups[i]; i++) {
1168                 df_item = &cg->default_groups[i]->cg_item;
1169                 cg->default_groups[i] = NULL;
1170                 config_item_put(df_item);
1171         }
1172
1173         config_item_put(item);
1174 }
1175
1176 static struct configfs_group_operations target_fabric_wwn_group_ops = {
1177         .make_group     = target_fabric_make_wwn,
1178         .drop_item      = target_fabric_drop_wwn,
1179 };
1180 /*
1181  * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
1182  */
1183 CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
1184
1185 static struct configfs_item_operations target_fabric_wwn_item_ops = {
1186         .show_attribute         = target_fabric_wwn_attr_show,
1187         .store_attribute        = target_fabric_wwn_attr_store,
1188 };
1189
1190 TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
1191
1192 /* End of tfc_wwn_cit */
1193
1194 /* Start of tfc_discovery_cit */
1195
1196 CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
1197                 tf_disc_group);
1198
1199 static struct configfs_item_operations target_fabric_discovery_item_ops = {
1200         .show_attribute         = target_fabric_discovery_attr_show,
1201         .store_attribute        = target_fabric_discovery_attr_store,
1202 };
1203
1204 TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
1205
1206 /* End of tfc_discovery_cit */
1207
1208 int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1209 {
1210         target_fabric_setup_discovery_cit(tf);
1211         target_fabric_setup_wwn_cit(tf);
1212         target_fabric_setup_wwn_fabric_stats_cit(tf);
1213         target_fabric_setup_tpg_cit(tf);
1214         target_fabric_setup_tpg_base_cit(tf);
1215         target_fabric_setup_tpg_port_cit(tf);
1216         target_fabric_setup_tpg_port_stat_cit(tf);
1217         target_fabric_setup_tpg_lun_cit(tf);
1218         target_fabric_setup_tpg_np_cit(tf);
1219         target_fabric_setup_tpg_np_base_cit(tf);
1220         target_fabric_setup_tpg_attrib_cit(tf);
1221         target_fabric_setup_tpg_auth_cit(tf);
1222         target_fabric_setup_tpg_param_cit(tf);
1223         target_fabric_setup_tpg_nacl_cit(tf);
1224         target_fabric_setup_tpg_nacl_base_cit(tf);
1225         target_fabric_setup_tpg_nacl_attrib_cit(tf);
1226         target_fabric_setup_tpg_nacl_auth_cit(tf);
1227         target_fabric_setup_tpg_nacl_param_cit(tf);
1228         target_fabric_setup_tpg_nacl_stat_cit(tf);
1229         target_fabric_setup_tpg_mappedlun_cit(tf);
1230         target_fabric_setup_tpg_mappedlun_stat_cit(tf);
1231
1232         return 0;
1233 }