drivers/target/target_core_fabric_configfs.c

   1 /*******************************************************************************
   2 * Filename: target_core_fabric_configfs.c
   3  *
   4  * This file contains generic fabric module configfs infrastructure for
   5  * TCM v4.x code
   6  *
   7  * (c) Copyright 2010-2013 Datera, Inc.
   8  *
   9  * Nicholas A. Bellinger <nab@linux-iscsi.org>
  10 *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  ****************************************************************************/
  21
  22 #include <linux/module.h>
  23 #include <linux/moduleparam.h>
  24 #include <linux/utsname.h>
  25 #include <linux/init.h>
  26 #include <linux/fs.h>
  27 #include <linux/namei.h>
  28 #include <linux/slab.h>
  29 #include <linux/types.h>
  30 #include <linux/delay.h>
  31 #include <linux/unistd.h>
  32 #include <linux/string.h>
  33 #include <linux/syscalls.h>
  34 #include <linux/configfs.h>
  35
  36 #include <target/target_core_base.h>
  37 #include <target/target_core_fabric.h>
  38 #include <target/target_core_fabric_configfs.h>
  39 #include <target/target_core_configfs.h>
  40 #include <target/configfs_macros.h>
  41
  42 #include "target_core_internal.h"
  43 #include "target_core_alua.h"
  44 #include "target_core_pr.h"
  45
  46 #define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  47 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
  48 {                                                                       \
  49         struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
  50         struct config_item_type *cit = &tfc->tfc_##_name##_cit;         \
  51                                                                         \
  52         cit->ct_item_ops = _item_ops;                                   \
  53         cit->ct_group_ops = _group_ops;                                 \
  54         cit->ct_attrs = _attrs;                                         \
  55         cit->ct_owner = tf->tf_module;                                  \
  56         pr_debug("Setup generic %s\n", __stringify(_name));             \
  57 }
  58
  59 /* Start of tfc_tpg_mappedlun_cit */
  60
  61 static int target_fabric_mappedlun_link(
  62         struct config_item *lun_acl_ci,
  63         struct config_item *lun_ci)
  64 {
  65         struct se_dev_entry *deve;
  66         struct se_lun *lun = container_of(to_config_group(lun_ci),
  67                         struct se_lun, lun_group);
  68         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
  69                         struct se_lun_acl, se_lun_group);
  70         struct se_portal_group *se_tpg;
  71         struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
  72         int ret = 0, lun_access;
  73
  74         if (lun->lun_link_magic != SE_LUN_LINK_MAGIC) {
  75                 pr_err("Bad lun->lun_link_magic, not a valid lun_ci pointer:"
  76                         " %p to struct lun: %p\n", lun_ci, lun);
  77                 return -EFAULT;
  78         }
  79         /*
  80          * Ensure that the source port exists
  81          */
  82         if (!lun->lun_sep || !lun->lun_sep->sep_tpg) {
  83                 pr_err("Source se_lun->lun_sep or lun->lun_sep->sep"
  84                                 "_tpg does not exist\n");
  85                 return -EINVAL;
  86         }
  87         se_tpg = lun->lun_sep->sep_tpg;
  88
  89         nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
  90         tpg_ci = &nacl_ci->ci_group->cg_item;
  91         wwn_ci = &tpg_ci->ci_group->cg_item;
  92         tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
  93         wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
  94         /*
  95          * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
  96          */
  97         if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
  98                 pr_err("Illegal Initiator ACL SymLink outside of %s\n",
  99                         config_item_name(wwn_ci));
 100                 return -EINVAL;
 101         }
 102         if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
 103                 pr_err("Illegal Initiator ACL Symlink outside of %s"
 104                         " TPGT: %s\n", config_item_name(wwn_ci),
 105                         config_item_name(tpg_ci));
 106                 return -EINVAL;
 107         }
 108         /*
 109          * If this struct se_node_acl was dynamically generated with
 110          * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
 111          * which be will write protected (READ-ONLY) when
 112          * tpg_1/attrib/demo_mode_write_protect=1
 113          */
 114         spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
 115         deve = lacl->se_lun_nacl->device_list[lacl->mapped_lun];
 116         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
 117                 lun_access = deve->lun_flags;
 118         else
 119                 lun_access =
 120                         (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
 121                                 se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
 122                                            TRANSPORT_LUNFLAGS_READ_WRITE;
 123         spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
 124         /*
 125          * Determine the actual mapped LUN value user wants..
 126          *
 127          * This value is what the SCSI Initiator actually sees the
 128          * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
 129          */
 130         ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
 131                         lun->unpacked_lun, lun_access);
 132
 133         return (ret < 0) ? -EINVAL : 0;
 134 }
 135
 136 static int target_fabric_mappedlun_unlink(
 137         struct config_item *lun_acl_ci,
 138         struct config_item *lun_ci)
 139 {
 140         struct se_lun *lun;
 141         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
 142                         struct se_lun_acl, se_lun_group);
 143         struct se_node_acl *nacl = lacl->se_lun_nacl;
 144         struct se_dev_entry *deve = nacl->device_list[lacl->mapped_lun];
 145         struct se_portal_group *se_tpg;
 146         /*
 147          * Determine if the underlying MappedLUN has already been released..
 148          */
 149         if (!deve->se_lun)
 150                 return 0;
 151
 152         lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
 153         se_tpg = lun->lun_sep->sep_tpg;
 154
 155         core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
 156         return 0;
 157 }
 158
 159 CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
 160 #define TCM_MAPPEDLUN_ATTR(_name, _mode)                                \
 161 static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
 162         __CONFIGFS_EATTR(_name, _mode,                                  \
 163         target_fabric_mappedlun_show_##_name,                           \
 164         target_fabric_mappedlun_store_##_name);
 165
 166 static ssize_t target_fabric_mappedlun_show_write_protect(
 167         struct se_lun_acl *lacl,
 168         char *page)
 169 {
 170         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 171         struct se_dev_entry *deve;
 172         ssize_t len;
 173
 174         spin_lock_irq(&se_nacl->device_list_lock);
 175         deve = se_nacl->device_list[lacl->mapped_lun];
 176         len = sprintf(page, "%d\n",
 177                         (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
 178                         1 : 0);
 179         spin_unlock_irq(&se_nacl->device_list_lock);
 180
 181         return len;
 182 }
 183
 184 static ssize_t target_fabric_mappedlun_store_write_protect(
 185         struct se_lun_acl *lacl,
 186         const char *page,
 187         size_t count)
 188 {
 189         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 190         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 191         unsigned long op;
 192         int ret;
 193
 194         ret = kstrtoul(page, 0, &op);
 195         if (ret)
 196                 return ret;
 197
 198         if ((op != 1) && (op != 0))
 199                 return -EINVAL;
 200
 201         core_update_device_list_access(lacl->mapped_lun, (op) ?
 202                         TRANSPORT_LUNFLAGS_READ_ONLY :
 203                         TRANSPORT_LUNFLAGS_READ_WRITE,
 204                         lacl->se_lun_nacl);
 205
 206         pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
 207                 " Mapped LUN: %u Write Protect bit to %s\n",
 208                 se_tpg->se_tpg_tfo->get_fabric_name(),
 209                 lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
 210
 211         return count;
 212
 213 }
 214
 215 TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
 216
 217 CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
 218
 219 static void target_fabric_mappedlun_release(struct config_item *item)
 220 {
 221         struct se_lun_acl *lacl = container_of(to_config_group(item),
 222                                 struct se_lun_acl, se_lun_group);
 223         struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
 224
 225         core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
 226 }
 227
 228 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
 229         &target_fabric_mappedlun_write_protect.attr,
 230         NULL,
 231 };
 232
 233 static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
 234         .release                = target_fabric_mappedlun_release,
 235         .show_attribute         = target_fabric_mappedlun_attr_show,
 236         .store_attribute        = target_fabric_mappedlun_attr_store,
 237         .allow_link             = target_fabric_mappedlun_link,
 238         .drop_link              = target_fabric_mappedlun_unlink,
 239 };
 240
 241 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
 242                 target_fabric_mappedlun_attrs);
 243
 244 /* End of tfc_tpg_mappedlun_cit */
 245
 246 /* Start of tfc_tpg_mappedlun_port_cit */
 247
 248 static struct config_group *target_core_mappedlun_stat_mkdir(
 249         struct config_group *group,
 250         const char *name)
 251 {
 252         return ERR_PTR(-ENOSYS);
 253 }
 254
 255 static void target_core_mappedlun_stat_rmdir(
 256         struct config_group *group,
 257         struct config_item *item)
 258 {
 259         return;
 260 }
 261
 262 static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
 263         .make_group             = target_core_mappedlun_stat_mkdir,
 264         .drop_item              = target_core_mappedlun_stat_rmdir,
 265 };
 266
 267 TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
 268                 NULL);
 269
 270 /* End of tfc_tpg_mappedlun_port_cit */
 271
 272 /* Start of tfc_tpg_nacl_attrib_cit */
 273
 274 CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
 275
 276 static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
 277         .show_attribute         = target_fabric_nacl_attrib_attr_show,
 278         .store_attribute        = target_fabric_nacl_attrib_attr_store,
 279 };
 280
 281 TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
 282
 283 /* End of tfc_tpg_nacl_attrib_cit */
 284
 285 /* Start of tfc_tpg_nacl_auth_cit */
 286
 287 CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
 288
 289 static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
 290         .show_attribute         = target_fabric_nacl_auth_attr_show,
 291         .store_attribute        = target_fabric_nacl_auth_attr_store,
 292 };
 293
 294 TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
 295
 296 /* End of tfc_tpg_nacl_auth_cit */
 297
 298 /* Start of tfc_tpg_nacl_param_cit */
 299
 300 CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
 301
 302 static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
 303         .show_attribute         = target_fabric_nacl_param_attr_show,
 304         .store_attribute        = target_fabric_nacl_param_attr_store,
 305 };
 306
 307 TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
 308
 309 /* End of tfc_tpg_nacl_param_cit */
 310
 311 /* Start of tfc_tpg_nacl_base_cit */
 312
 313 CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
 314
 315 static struct config_group *target_fabric_make_mappedlun(
 316         struct config_group *group,
 317         const char *name)
 318 {
 319         struct se_node_acl *se_nacl = container_of(group,
 320                         struct se_node_acl, acl_group);
 321         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 322         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 323         struct se_lun_acl *lacl;
 324         struct config_item *acl_ci;
 325         struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
 326         char *buf;
 327         unsigned long mapped_lun;
 328         int ret = 0;
 329
 330         acl_ci = &group->cg_item;
 331         if (!acl_ci) {
 332                 pr_err("Unable to locatel acl_ci\n");
 333                 return NULL;
 334         }
 335
 336         buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
 337         if (!buf) {
 338                 pr_err("Unable to allocate memory for name buf\n");
 339                 return ERR_PTR(-ENOMEM);
 340         }
 341         snprintf(buf, strlen(name) + 1, "%s", name);
 342         /*
 343          * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
 344          */
 345         if (strstr(buf, "lun_") != buf) {
 346                 pr_err("Unable to locate \"lun_\" from buf: %s"
 347                         " name: %s\n", buf, name);
 348                 ret = -EINVAL;
 349                 goto out;
 350         }
 351         /*
 352          * Determine the Mapped LUN value.  This is what the SCSI Initiator
 353          * Port will actually see.
 354          */
 355         ret = kstrtoul(buf + 4, 0, &mapped_lun);
 356         if (ret)
 357                 goto out;
 358         if (mapped_lun > UINT_MAX) {
 359                 ret = -EINVAL;
 360                 goto out;
 361         }
 362         if (mapped_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
 363                 pr_err("Mapped LUN: %lu exceeds TRANSPORT_MAX_LUNS_PER_TPG"
 364                         "-1: %u for Target Portal Group: %u\n", mapped_lun,
 365                         TRANSPORT_MAX_LUNS_PER_TPG-1,
 366                         se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
 367                 ret = -EINVAL;
 368                 goto out;
 369         }
 370
 371         lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
 372                         mapped_lun, &ret);
 373         if (!lacl) {
 374                 ret = -EINVAL;
 375                 goto out;
 376         }
 377
 378         lacl_cg = &lacl->se_lun_group;
 379         lacl_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 380                                 GFP_KERNEL);
 381         if (!lacl_cg->default_groups) {
 382                 pr_err("Unable to allocate lacl_cg->default_groups\n");
 383                 ret = -ENOMEM;
 384                 goto out;
 385         }
 386
 387         config_group_init_type_name(&lacl->se_lun_group, name,
 388                         &tf->tf_cit_tmpl.tfc_tpg_mappedlun_cit);
 389         config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
 390                         "statistics", &tf->tf_cit_tmpl.tfc_tpg_mappedlun_stat_cit);
 391         lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
 392         lacl_cg->default_groups[1] = NULL;
 393
 394         ml_stat_grp = &lacl->ml_stat_grps.stat_group;
 395         ml_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 3,
 396                                 GFP_KERNEL);
 397         if (!ml_stat_grp->default_groups) {
 398                 pr_err("Unable to allocate ml_stat_grp->default_groups\n");
 399                 ret = -ENOMEM;
 400                 goto out;
 401         }
 402         target_stat_setup_mappedlun_default_groups(lacl);
 403
 404         kfree(buf);
 405         return &lacl->se_lun_group;
 406 out:
 407         if (lacl_cg)
 408                 kfree(lacl_cg->default_groups);
 409         kfree(buf);
 410         return ERR_PTR(ret);
 411 }
 412
 413 static void target_fabric_drop_mappedlun(
 414         struct config_group *group,
 415         struct config_item *item)
 416 {
 417         struct se_lun_acl *lacl = container_of(to_config_group(item),
 418                         struct se_lun_acl, se_lun_group);
 419         struct config_item *df_item;
 420         struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
 421         int i;
 422
 423         ml_stat_grp = &lacl->ml_stat_grps.stat_group;
 424         for (i = 0; ml_stat_grp->default_groups[i]; i++) {
 425                 df_item = &ml_stat_grp->default_groups[i]->cg_item;
 426                 ml_stat_grp->default_groups[i] = NULL;
 427                 config_item_put(df_item);
 428         }
 429         kfree(ml_stat_grp->default_groups);
 430
 431         lacl_cg = &lacl->se_lun_group;
 432         for (i = 0; lacl_cg->default_groups[i]; i++) {
 433                 df_item = &lacl_cg->default_groups[i]->cg_item;
 434                 lacl_cg->default_groups[i] = NULL;
 435                 config_item_put(df_item);
 436         }
 437         kfree(lacl_cg->default_groups);
 438
 439         config_item_put(item);
 440 }
 441
 442 static void target_fabric_nacl_base_release(struct config_item *item)
 443 {
 444         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 445                         struct se_node_acl, acl_group);
 446         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 447         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 448
 449         tf->tf_ops.fabric_drop_nodeacl(se_nacl);
 450 }
 451
 452 static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
 453         .release                = target_fabric_nacl_base_release,
 454         .show_attribute         = target_fabric_nacl_base_attr_show,
 455         .store_attribute        = target_fabric_nacl_base_attr_store,
 456 };
 457
 458 static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
 459         .make_group             = target_fabric_make_mappedlun,
 460         .drop_item              = target_fabric_drop_mappedlun,
 461 };
 462
 463 TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
 464                 &target_fabric_nacl_base_group_ops, NULL);
 465
 466 /* End of tfc_tpg_nacl_base_cit */
 467
 468 /* Start of tfc_node_fabric_stats_cit */
 469 /*
 470  * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
 471  * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
 472  */
 473 TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
 474
 475 /* End of tfc_wwn_fabric_stats_cit */
 476
 477 /* Start of tfc_tpg_nacl_cit */
 478
 479 static struct config_group *target_fabric_make_nodeacl(
 480         struct config_group *group,
 481         const char *name)
 482 {
 483         struct se_portal_group *se_tpg = container_of(group,
 484                         struct se_portal_group, tpg_acl_group);
 485         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 486         struct se_node_acl *se_nacl;
 487         struct config_group *nacl_cg;
 488
 489         if (!tf->tf_ops.fabric_make_nodeacl) {
 490                 pr_err("tf->tf_ops.fabric_make_nodeacl is NULL\n");
 491                 return ERR_PTR(-ENOSYS);
 492         }
 493
 494         se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
 495         if (IS_ERR(se_nacl))
 496                 return ERR_CAST(se_nacl);
 497
 498         nacl_cg = &se_nacl->acl_group;
 499         nacl_cg->default_groups = se_nacl->acl_default_groups;
 500         nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
 501         nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
 502         nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
 503         nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
 504         nacl_cg->default_groups[4] = NULL;
 505
 506         config_group_init_type_name(&se_nacl->acl_group, name,
 507                         &tf->tf_cit_tmpl.tfc_tpg_nacl_base_cit);
 508         config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
 509                         &tf->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit);
 510         config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
 511                         &tf->tf_cit_tmpl.tfc_tpg_nacl_auth_cit);
 512         config_group_init_type_name(&se_nacl->acl_param_group, "param",
 513                         &tf->tf_cit_tmpl.tfc_tpg_nacl_param_cit);
 514         config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
 515                         "fabric_statistics",
 516                         &tf->tf_cit_tmpl.tfc_tpg_nacl_stat_cit);
 517
 518         return &se_nacl->acl_group;
 519 }
 520
 521 static void target_fabric_drop_nodeacl(
 522         struct config_group *group,
 523         struct config_item *item)
 524 {
 525         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 526                         struct se_node_acl, acl_group);
 527         struct config_item *df_item;
 528         struct config_group *nacl_cg;
 529         int i;
 530
 531         nacl_cg = &se_nacl->acl_group;
 532         for (i = 0; nacl_cg->default_groups[i]; i++) {
 533                 df_item = &nacl_cg->default_groups[i]->cg_item;
 534                 nacl_cg->default_groups[i] = NULL;
 535                 config_item_put(df_item);
 536         }
 537         /*
 538          * struct se_node_acl free is done in target_fabric_nacl_base_release()
 539          */
 540         config_item_put(item);
 541 }
 542
 543 static struct configfs_group_operations target_fabric_nacl_group_ops = {
 544         .make_group     = target_fabric_make_nodeacl,
 545         .drop_item      = target_fabric_drop_nodeacl,
 546 };
 547
 548 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
 549
 550 /* End of tfc_tpg_nacl_cit */
 551
 552 /* Start of tfc_tpg_np_base_cit */
 553
 554 CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
 555
 556 static void target_fabric_np_base_release(struct config_item *item)
 557 {
 558         struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
 559                                 struct se_tpg_np, tpg_np_group);
 560         struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
 561         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 562
 563         tf->tf_ops.fabric_drop_np(se_tpg_np);
 564 }
 565
 566 static struct configfs_item_operations target_fabric_np_base_item_ops = {
 567         .release                = target_fabric_np_base_release,
 568         .show_attribute         = target_fabric_np_base_attr_show,
 569         .store_attribute        = target_fabric_np_base_attr_store,
 570 };
 571
 572 TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
 573
 574 /* End of tfc_tpg_np_base_cit */
 575
 576 /* Start of tfc_tpg_np_cit */
 577
 578 static struct config_group *target_fabric_make_np(
 579         struct config_group *group,
 580         const char *name)
 581 {
 582         struct se_portal_group *se_tpg = container_of(group,
 583                                 struct se_portal_group, tpg_np_group);
 584         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 585         struct se_tpg_np *se_tpg_np;
 586
 587         if (!tf->tf_ops.fabric_make_np) {
 588                 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
 589                 return ERR_PTR(-ENOSYS);
 590         }
 591
 592         se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
 593         if (!se_tpg_np || IS_ERR(se_tpg_np))
 594                 return ERR_PTR(-EINVAL);
 595
 596         se_tpg_np->tpg_np_parent = se_tpg;
 597         config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
 598                         &tf->tf_cit_tmpl.tfc_tpg_np_base_cit);
 599
 600         return &se_tpg_np->tpg_np_group;
 601 }
 602
 603 static void target_fabric_drop_np(
 604         struct config_group *group,
 605         struct config_item *item)
 606 {
 607         /*
 608          * struct se_tpg_np is released via target_fabric_np_base_release()
 609          */
 610         config_item_put(item);
 611 }
 612
 613 static struct configfs_group_operations target_fabric_np_group_ops = {
 614         .make_group     = &target_fabric_make_np,
 615         .drop_item      = &target_fabric_drop_np,
 616 };
 617
 618 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
 619
 620 /* End of tfc_tpg_np_cit */
 621
 622 /* Start of tfc_tpg_port_cit */
 623
 624 CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
 625 #define TCM_PORT_ATTR(_name, _mode)                                     \
 626 static struct target_fabric_port_attribute target_fabric_port_##_name = \
 627         __CONFIGFS_EATTR(_name, _mode,                                  \
 628         target_fabric_port_show_attr_##_name,                           \
 629         target_fabric_port_store_attr_##_name);
 630
 631 #define TCM_PORT_ATTOR_RO(_name)                                        \
 632         __CONFIGFS_EATTR_RO(_name,                                      \
 633         target_fabric_port_show_attr_##_name);
 634
 635 /*
 636  * alua_tg_pt_gp
 637  */
 638 static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
 639         struct se_lun *lun,
 640         char *page)
 641 {
 642         if (!lun || !lun->lun_sep)
 643                 return -ENODEV;
 644
 645         return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
 646 }
 647
 648 static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
 649         struct se_lun *lun,
 650         const char *page,
 651         size_t count)
 652 {
 653         if (!lun || !lun->lun_sep)
 654                 return -ENODEV;
 655
 656         return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
 657 }
 658
 659 TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
 660
 661 /*
 662  * alua_tg_pt_offline
 663  */
 664 static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
 665         struct se_lun *lun,
 666         char *page)
 667 {
 668         if (!lun || !lun->lun_sep)
 669                 return -ENODEV;
 670
 671         return core_alua_show_offline_bit(lun, page);
 672 }
 673
 674 static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
 675         struct se_lun *lun,
 676         const char *page,
 677         size_t count)
 678 {
 679         if (!lun || !lun->lun_sep)
 680                 return -ENODEV;
 681
 682         return core_alua_store_offline_bit(lun, page, count);
 683 }
 684
 685 TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
 686
 687 /*
 688  * alua_tg_pt_status
 689  */
 690 static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
 691         struct se_lun *lun,
 692         char *page)
 693 {
 694         if (!lun || !lun->lun_sep)
 695                 return -ENODEV;
 696
 697         return core_alua_show_secondary_status(lun, page);
 698 }
 699
 700 static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
 701         struct se_lun *lun,
 702         const char *page,
 703         size_t count)
 704 {
 705         if (!lun || !lun->lun_sep)
 706                 return -ENODEV;
 707
 708         return core_alua_store_secondary_status(lun, page, count);
 709 }
 710
 711 TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
 712
 713 /*
 714  * alua_tg_pt_write_md
 715  */
 716 static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
 717         struct se_lun *lun,
 718         char *page)
 719 {
 720         if (!lun || !lun->lun_sep)
 721                 return -ENODEV;
 722
 723         return core_alua_show_secondary_write_metadata(lun, page);
 724 }
 725
 726 static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
 727         struct se_lun *lun,
 728         const char *page,
 729         size_t count)
 730 {
 731         if (!lun || !lun->lun_sep)
 732                 return -ENODEV;
 733
 734         return core_alua_store_secondary_write_metadata(lun, page, count);
 735 }
 736
 737 TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
 738
 739
 740 static struct configfs_attribute *target_fabric_port_attrs[] = {
 741         &target_fabric_port_alua_tg_pt_gp.attr,
 742         &target_fabric_port_alua_tg_pt_offline.attr,
 743         &target_fabric_port_alua_tg_pt_status.attr,
 744         &target_fabric_port_alua_tg_pt_write_md.attr,
 745         NULL,
 746 };
 747
 748 CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
 749
 750 static int target_fabric_port_link(
 751         struct config_item *lun_ci,
 752         struct config_item *se_dev_ci)
 753 {
 754         struct config_item *tpg_ci;
 755         struct se_lun *lun = container_of(to_config_group(lun_ci),
 756                                 struct se_lun, lun_group);
 757         struct se_lun *lun_p;
 758         struct se_portal_group *se_tpg;
 759         struct se_device *dev =
 760                 container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
 761         struct target_fabric_configfs *tf;
 762         int ret;
 763
 764         if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
 765                 pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
 766                         " %p to struct se_device: %p\n", se_dev_ci, dev);
 767                 return -EFAULT;
 768         }
 769
 770         if (!(dev->dev_flags & DF_CONFIGURED)) {
 771                 pr_err("se_device not configured yet, cannot port link\n");
 772                 return -ENODEV;
 773         }
 774
 775         tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
 776         se_tpg = container_of(to_config_group(tpg_ci),
 777                                 struct se_portal_group, tpg_group);
 778         tf = se_tpg->se_tpg_wwn->wwn_tf;
 779
 780         if (lun->lun_se_dev !=  NULL) {
 781                 pr_err("Port Symlink already exists\n");
 782                 return -EEXIST;
 783         }
 784
 785         lun_p = core_dev_add_lun(se_tpg, dev, lun->unpacked_lun);
 786         if (IS_ERR(lun_p)) {
 787                 pr_err("core_dev_add_lun() failed\n");
 788                 ret = PTR_ERR(lun_p);
 789                 goto out;
 790         }
 791
 792         if (tf->tf_ops.fabric_post_link) {
 793                 /*
 794                  * Call the optional fabric_post_link() to allow a
 795                  * fabric module to setup any additional state once
 796                  * core_dev_add_lun() has been called..
 797                  */
 798                 tf->tf_ops.fabric_post_link(se_tpg, lun);
 799         }
 800
 801         return 0;
 802 out:
 803         return ret;
 804 }
 805
 806 static int target_fabric_port_unlink(
 807         struct config_item *lun_ci,
 808         struct config_item *se_dev_ci)
 809 {
 810         struct se_lun *lun = container_of(to_config_group(lun_ci),
 811                                 struct se_lun, lun_group);
 812         struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
 813         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 814
 815         if (tf->tf_ops.fabric_pre_unlink) {
 816                 /*
 817                  * Call the optional fabric_pre_unlink() to allow a
 818                  * fabric module to release any additional stat before
 819                  * core_dev_del_lun() is called.
 820                 */
 821                 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
 822         }
 823
 824         core_dev_del_lun(se_tpg, lun->unpacked_lun);
 825         return 0;
 826 }
 827
 828 static struct configfs_item_operations target_fabric_port_item_ops = {
 829         .show_attribute         = target_fabric_port_attr_show,
 830         .store_attribute        = target_fabric_port_attr_store,
 831         .allow_link             = target_fabric_port_link,
 832         .drop_link              = target_fabric_port_unlink,
 833 };
 834
 835 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
 836
 837 /* End of tfc_tpg_port_cit */
 838
 839 /* Start of tfc_tpg_port_stat_cit */
 840
 841 static struct config_group *target_core_port_stat_mkdir(
 842         struct config_group *group,
 843         const char *name)
 844 {
 845         return ERR_PTR(-ENOSYS);
 846 }
 847
 848 static void target_core_port_stat_rmdir(
 849         struct config_group *group,
 850         struct config_item *item)
 851 {
 852         return;
 853 }
 854
 855 static struct configfs_group_operations target_fabric_port_stat_group_ops = {
 856         .make_group             = target_core_port_stat_mkdir,
 857         .drop_item              = target_core_port_stat_rmdir,
 858 };
 859
 860 TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
 861
 862 /* End of tfc_tpg_port_stat_cit */
 863
 864 /* Start of tfc_tpg_lun_cit */
 865
 866 static struct config_group *target_fabric_make_lun(
 867         struct config_group *group,
 868         const char *name)
 869 {
 870         struct se_lun *lun;
 871         struct se_portal_group *se_tpg = container_of(group,
 872                         struct se_portal_group, tpg_lun_group);
 873         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 874         struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
 875         unsigned long unpacked_lun;
 876         int errno;
 877
 878         if (strstr(name, "lun_") != name) {
 879                 pr_err("Unable to locate \'_\" in"
 880                                 " \"lun_$LUN_NUMBER\"\n");
 881                 return ERR_PTR(-EINVAL);
 882         }
 883         errno = kstrtoul(name + 4, 0, &unpacked_lun);
 884         if (errno)
 885                 return ERR_PTR(errno);
 886         if (unpacked_lun > UINT_MAX)
 887                 return ERR_PTR(-EINVAL);
 888
 889         lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
 890         if (!lun)
 891                 return ERR_PTR(-EINVAL);
 892
 893         lun_cg = &lun->lun_group;
 894         lun_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 895                                 GFP_KERNEL);
 896         if (!lun_cg->default_groups) {
 897                 pr_err("Unable to allocate lun_cg->default_groups\n");
 898                 return ERR_PTR(-ENOMEM);
 899         }
 900
 901         config_group_init_type_name(&lun->lun_group, name,
 902                         &tf->tf_cit_tmpl.tfc_tpg_port_cit);
 903         config_group_init_type_name(&lun->port_stat_grps.stat_group,
 904                         "statistics", &tf->tf_cit_tmpl.tfc_tpg_port_stat_cit);
 905         lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
 906         lun_cg->default_groups[1] = NULL;
 907
 908         port_stat_grp = &lun->port_stat_grps.stat_group;
 909         port_stat_grp->default_groups =  kzalloc(sizeof(struct config_group *) * 4,
 910                                 GFP_KERNEL);
 911         if (!port_stat_grp->default_groups) {
 912                 pr_err("Unable to allocate port_stat_grp->default_groups\n");
 913                 errno = -ENOMEM;
 914                 goto out;
 915         }
 916         target_stat_setup_port_default_groups(lun);
 917
 918         return &lun->lun_group;
 919 out:
 920         if (lun_cg)
 921                 kfree(lun_cg->default_groups);
 922         return ERR_PTR(errno);
 923 }
 924
 925 static void target_fabric_drop_lun(
 926         struct config_group *group,
 927         struct config_item *item)
 928 {
 929         struct se_lun *lun = container_of(to_config_group(item),
 930                                 struct se_lun, lun_group);
 931         struct config_item *df_item;
 932         struct config_group *lun_cg, *port_stat_grp;
 933         int i;
 934
 935         port_stat_grp = &lun->port_stat_grps.stat_group;
 936         for (i = 0; port_stat_grp->default_groups[i]; i++) {
 937                 df_item = &port_stat_grp->default_groups[i]->cg_item;
 938                 port_stat_grp->default_groups[i] = NULL;
 939                 config_item_put(df_item);
 940         }
 941         kfree(port_stat_grp->default_groups);
 942
 943         lun_cg = &lun->lun_group;
 944         for (i = 0; lun_cg->default_groups[i]; i++) {
 945                 df_item = &lun_cg->default_groups[i]->cg_item;
 946                 lun_cg->default_groups[i] = NULL;
 947                 config_item_put(df_item);
 948         }
 949         kfree(lun_cg->default_groups);
 950
 951         config_item_put(item);
 952 }
 953
 954 static struct configfs_group_operations target_fabric_lun_group_ops = {
 955         .make_group     = &target_fabric_make_lun,
 956         .drop_item      = &target_fabric_drop_lun,
 957 };
 958
 959 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
 960
 961 /* End of tfc_tpg_lun_cit */
 962
 963 /* Start of tfc_tpg_attrib_cit */
 964
 965 CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
 966
 967 static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
 968         .show_attribute         = target_fabric_tpg_attrib_attr_show,
 969         .store_attribute        = target_fabric_tpg_attrib_attr_store,
 970 };
 971
 972 TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
 973
 974 /* End of tfc_tpg_attrib_cit */
 975
 976 /* Start of tfc_tpg_auth_cit */
 977
 978 CONFIGFS_EATTR_OPS(target_fabric_tpg_auth, se_portal_group, tpg_auth_group);
 979
 980 static struct configfs_item_operations target_fabric_tpg_auth_item_ops = {
 981         .show_attribute         = target_fabric_tpg_auth_attr_show,
 982         .store_attribute        = target_fabric_tpg_auth_attr_store,
 983 };
 984
 985 TF_CIT_SETUP(tpg_auth, &target_fabric_tpg_auth_item_ops, NULL, NULL);
 986
 987 /* End of tfc_tpg_attrib_cit */
 988
 989 /* Start of tfc_tpg_param_cit */
 990
 991 CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
 992
 993 static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
 994         .show_attribute         = target_fabric_tpg_param_attr_show,
 995         .store_attribute        = target_fabric_tpg_param_attr_store,
 996 };
 997
 998 TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
 999
1000 /* End of tfc_tpg_param_cit */
1001
1002 /* Start of tfc_tpg_base_cit */
1003 /*
1004  * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
1005  */
1006 CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
1007
1008 static void target_fabric_tpg_release(struct config_item *item)
1009 {
1010         struct se_portal_group *se_tpg = container_of(to_config_group(item),
1011                         struct se_portal_group, tpg_group);
1012         struct se_wwn *wwn = se_tpg->se_tpg_wwn;
1013         struct target_fabric_configfs *tf = wwn->wwn_tf;
1014
1015         tf->tf_ops.fabric_drop_tpg(se_tpg);
1016 }
1017
1018 static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
1019         .release                = target_fabric_tpg_release,
1020         .show_attribute         = target_fabric_tpg_attr_show,
1021         .store_attribute        = target_fabric_tpg_attr_store,
1022 };
1023
1024 TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
1025
1026 /* End of tfc_tpg_base_cit */
1027
1028 /* Start of tfc_tpg_cit */
1029
1030 static struct config_group *target_fabric_make_tpg(
1031         struct config_group *group,
1032         const char *name)
1033 {
1034         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
1035         struct target_fabric_configfs *tf = wwn->wwn_tf;
1036         struct se_portal_group *se_tpg;
1037
1038         if (!tf->tf_ops.fabric_make_tpg) {
1039                 pr_err("tf->tf_ops.fabric_make_tpg is NULL\n");
1040                 return ERR_PTR(-ENOSYS);
1041         }
1042
1043         se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
1044         if (!se_tpg || IS_ERR(se_tpg))
1045                 return ERR_PTR(-EINVAL);
1046         /*
1047          * Setup default groups from pre-allocated se_tpg->tpg_default_groups
1048          */
1049         se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
1050         se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
1051         se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
1052         se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
1053         se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
1054         se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_auth_group;
1055         se_tpg->tpg_group.default_groups[5] = &se_tpg->tpg_param_group;
1056         se_tpg->tpg_group.default_groups[6] = NULL;
1057
1058         config_group_init_type_name(&se_tpg->tpg_group, name,
1059                         &tf->tf_cit_tmpl.tfc_tpg_base_cit);
1060         config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
1061                         &tf->tf_cit_tmpl.tfc_tpg_lun_cit);
1062         config_group_init_type_name(&se_tpg->tpg_np_group, "np",
1063                         &tf->tf_cit_tmpl.tfc_tpg_np_cit);
1064         config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
1065                         &tf->tf_cit_tmpl.tfc_tpg_nacl_cit);
1066         config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
1067                         &tf->tf_cit_tmpl.tfc_tpg_attrib_cit);
1068         config_group_init_type_name(&se_tpg->tpg_auth_group, "auth",
1069                         &tf->tf_cit_tmpl.tfc_tpg_auth_cit);
1070         config_group_init_type_name(&se_tpg->tpg_param_group, "param",
1071                         &tf->tf_cit_tmpl.tfc_tpg_param_cit);
1072
1073         return &se_tpg->tpg_group;
1074 }
1075
1076 static void target_fabric_drop_tpg(
1077         struct config_group *group,
1078         struct config_item *item)
1079 {
1080         struct se_portal_group *se_tpg = container_of(to_config_group(item),
1081                                 struct se_portal_group, tpg_group);
1082         struct config_group *tpg_cg = &se_tpg->tpg_group;
1083         struct config_item *df_item;
1084         int i;
1085         /*
1086          * Release default groups, but do not release tpg_cg->default_groups
1087          * memory as it is statically allocated at se_tpg->tpg_default_groups.
1088          */
1089         for (i = 0; tpg_cg->default_groups[i]; i++) {
1090                 df_item = &tpg_cg->default_groups[i]->cg_item;
1091                 tpg_cg->default_groups[i] = NULL;
1092                 config_item_put(df_item);
1093         }
1094
1095         config_item_put(item);
1096 }
1097
1098 static void target_fabric_release_wwn(struct config_item *item)
1099 {
1100         struct se_wwn *wwn = container_of(to_config_group(item),
1101                                 struct se_wwn, wwn_group);
1102         struct target_fabric_configfs *tf = wwn->wwn_tf;
1103
1104         tf->tf_ops.fabric_drop_wwn(wwn);
1105 }
1106
1107 static struct configfs_item_operations target_fabric_tpg_item_ops = {
1108         .release        = target_fabric_release_wwn,
1109 };
1110
1111 static struct configfs_group_operations target_fabric_tpg_group_ops = {
1112         .make_group     = target_fabric_make_tpg,
1113         .drop_item      = target_fabric_drop_tpg,
1114 };
1115
1116 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
1117                 NULL);
1118
1119 /* End of tfc_tpg_cit */
1120
1121 /* Start of tfc_wwn_fabric_stats_cit */
1122 /*
1123  * This is used as a placeholder for struct se_wwn->fabric_stat_group
1124  * to allow fabrics access to ->fabric_stat_group->default_groups[]
1125  */
1126 TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
1127
1128 /* End of tfc_wwn_fabric_stats_cit */
1129
1130 /* Start of tfc_wwn_cit */
1131
1132 static struct config_group *target_fabric_make_wwn(
1133         struct config_group *group,
1134         const char *name)
1135 {
1136         struct target_fabric_configfs *tf = container_of(group,
1137                                 struct target_fabric_configfs, tf_group);
1138         struct se_wwn *wwn;
1139
1140         if (!tf->tf_ops.fabric_make_wwn) {
1141                 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
1142                 return ERR_PTR(-ENOSYS);
1143         }
1144
1145         wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
1146         if (!wwn || IS_ERR(wwn))
1147                 return ERR_PTR(-EINVAL);
1148
1149         wwn->wwn_tf = tf;
1150         /*
1151          * Setup default groups from pre-allocated wwn->wwn_default_groups
1152          */
1153         wwn->wwn_group.default_groups = wwn->wwn_default_groups;
1154         wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
1155         wwn->wwn_group.default_groups[1] = NULL;
1156
1157         config_group_init_type_name(&wwn->wwn_group, name,
1158                         &tf->tf_cit_tmpl.tfc_tpg_cit);
1159         config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
1160                         &tf->tf_cit_tmpl.tfc_wwn_fabric_stats_cit);
1161
1162         return &wwn->wwn_group;
1163 }
1164
1165 static void target_fabric_drop_wwn(
1166         struct config_group *group,
1167         struct config_item *item)
1168 {
1169         struct se_wwn *wwn = container_of(to_config_group(item),
1170                                 struct se_wwn, wwn_group);
1171         struct config_item *df_item;
1172         struct config_group *cg = &wwn->wwn_group;
1173         int i;
1174
1175         for (i = 0; cg->default_groups[i]; i++) {
1176                 df_item = &cg->default_groups[i]->cg_item;
1177                 cg->default_groups[i] = NULL;
1178                 config_item_put(df_item);
1179         }
1180
1181         config_item_put(item);
1182 }
1183
1184 static struct configfs_group_operations target_fabric_wwn_group_ops = {
1185         .make_group     = target_fabric_make_wwn,
1186         .drop_item      = target_fabric_drop_wwn,
1187 };
1188 /*
1189  * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
1190  */
1191 CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
1192
1193 static struct configfs_item_operations target_fabric_wwn_item_ops = {
1194         .show_attribute         = target_fabric_wwn_attr_show,
1195         .store_attribute        = target_fabric_wwn_attr_store,
1196 };
1197
1198 TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
1199
1200 /* End of tfc_wwn_cit */
1201
1202 /* Start of tfc_discovery_cit */
1203
1204 CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
1205                 tf_disc_group);
1206
1207 static struct configfs_item_operations target_fabric_discovery_item_ops = {
1208         .show_attribute         = target_fabric_discovery_attr_show,
1209         .store_attribute        = target_fabric_discovery_attr_store,
1210 };
1211
1212 TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
1213
1214 /* End of tfc_discovery_cit */
1215
1216 int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1217 {
1218         target_fabric_setup_discovery_cit(tf);
1219         target_fabric_setup_wwn_cit(tf);
1220         target_fabric_setup_wwn_fabric_stats_cit(tf);
1221         target_fabric_setup_tpg_cit(tf);
1222         target_fabric_setup_tpg_base_cit(tf);
1223         target_fabric_setup_tpg_port_cit(tf);
1224         target_fabric_setup_tpg_port_stat_cit(tf);
1225         target_fabric_setup_tpg_lun_cit(tf);
1226         target_fabric_setup_tpg_np_cit(tf);
1227         target_fabric_setup_tpg_np_base_cit(tf);
1228         target_fabric_setup_tpg_attrib_cit(tf);
1229         target_fabric_setup_tpg_auth_cit(tf);
1230         target_fabric_setup_tpg_param_cit(tf);
1231         target_fabric_setup_tpg_nacl_cit(tf);
1232         target_fabric_setup_tpg_nacl_base_cit(tf);
1233         target_fabric_setup_tpg_nacl_attrib_cit(tf);
1234         target_fabric_setup_tpg_nacl_auth_cit(tf);
1235         target_fabric_setup_tpg_nacl_param_cit(tf);
1236         target_fabric_setup_tpg_nacl_stat_cit(tf);
1237         target_fabric_setup_tpg_mappedlun_cit(tf);
1238         target_fabric_setup_tpg_mappedlun_stat_cit(tf);
1239
1240         return 0;
1241 }