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