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
  39 #include "target_core_internal.h"
  40 #include "target_core_alua.h"
  41 #include "target_core_pr.h"
  42
  43 #define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  44 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
  45 {                                                                       \
  46         struct config_item_type *cit = &tf->tf_##_name##_cit;           \
  47                                                                         \
  48         cit->ct_item_ops = _item_ops;                                   \
  49         cit->ct_group_ops = _group_ops;                                 \
  50         cit->ct_attrs = _attrs;                                         \
  51         cit->ct_owner = tf->tf_ops->module;                             \
  52         pr_debug("Setup generic %s\n", __stringify(_name));             \
  53 }
  54
  55 #define TF_CIT_SETUP_DRV(_name, _item_ops, _group_ops)          \
  56 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
  57 {                                                                       \
  58         struct config_item_type *cit = &tf->tf_##_name##_cit;           \
  59         struct configfs_attribute **attrs = tf->tf_ops->tfc_##_name##_attrs; \
  60                                                                         \
  61         cit->ct_item_ops = _item_ops;                                   \
  62         cit->ct_group_ops = _group_ops;                                 \
  63         cit->ct_attrs = attrs;                                          \
  64         cit->ct_owner = tf->tf_ops->module;                             \
  65         pr_debug("Setup generic %s\n", __stringify(_name));             \
  66 }
  67
  68 /* Start of tfc_tpg_mappedlun_cit */
  69
  70 static int target_fabric_mappedlun_link(
  71         struct config_item *lun_acl_ci,
  72         struct config_item *lun_ci)
  73 {
  74         struct se_dev_entry *deve;
  75         struct se_lun *lun = container_of(to_config_group(lun_ci),
  76                         struct se_lun, lun_group);
  77         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
  78                         struct se_lun_acl, se_lun_group);
  79         struct se_portal_group *se_tpg;
  80         struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
  81         int lun_access;
  82
  83         if (lun->lun_link_magic != SE_LUN_LINK_MAGIC) {
  84                 pr_err("Bad lun->lun_link_magic, not a valid lun_ci pointer:"
  85                         " %p to struct lun: %p\n", lun_ci, lun);
  86                 return -EFAULT;
  87         }
  88         /*
  89          * Ensure that the source port exists
  90          */
  91         if (!lun->lun_se_dev) {
  92                 pr_err("Source se_lun->lun_se_dev does not exist\n");
  93                 return -EINVAL;
  94         }
  95         se_tpg = lun->lun_tpg;
  96
  97         nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
  98         tpg_ci = &nacl_ci->ci_group->cg_item;
  99         wwn_ci = &tpg_ci->ci_group->cg_item;
 100         tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
 101         wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
 102         /*
 103          * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
 104          */
 105         if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
 106                 pr_err("Illegal Initiator ACL SymLink outside of %s\n",
 107                         config_item_name(wwn_ci));
 108                 return -EINVAL;
 109         }
 110         if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
 111                 pr_err("Illegal Initiator ACL Symlink outside of %s"
 112                         " TPGT: %s\n", config_item_name(wwn_ci),
 113                         config_item_name(tpg_ci));
 114                 return -EINVAL;
 115         }
 116         /*
 117          * If this struct se_node_acl was dynamically generated with
 118          * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
 119          * which be will write protected (READ-ONLY) when
 120          * tpg_1/attrib/demo_mode_write_protect=1
 121          */
 122         rcu_read_lock();
 123         deve = target_nacl_find_deve(lacl->se_lun_nacl, lacl->mapped_lun);
 124         if (deve)
 125                 lun_access = deve->lun_flags;
 126         else
 127                 lun_access =
 128                         (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
 129                                 se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
 130                                            TRANSPORT_LUNFLAGS_READ_WRITE;
 131         rcu_read_unlock();
 132         /*
 133          * Determine the actual mapped LUN value user wants..
 134          *
 135          * This value is what the SCSI Initiator actually sees the
 136          * $FABRIC/$WWPN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
 137          */
 138         return core_dev_add_initiator_node_lun_acl(se_tpg, lacl, lun, lun_access);
 139 }
 140
 141 static int target_fabric_mappedlun_unlink(
 142         struct config_item *lun_acl_ci,
 143         struct config_item *lun_ci)
 144 {
 145         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
 146                         struct se_lun_acl, se_lun_group);
 147         struct se_lun *lun = container_of(to_config_group(lun_ci),
 148                         struct se_lun, lun_group);
 149
 150         return core_dev_del_initiator_node_lun_acl(lun, lacl);
 151 }
 152
 153 static struct se_lun_acl *item_to_lun_acl(struct config_item *item)
 154 {
 155         return container_of(to_config_group(item), struct se_lun_acl,
 156                         se_lun_group);
 157 }
 158
 159 static ssize_t target_fabric_mappedlun_write_protect_show(
 160                 struct config_item *item, char *page)
 161 {
 162         struct se_lun_acl *lacl = item_to_lun_acl(item);
 163         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 164         struct se_dev_entry *deve;
 165         ssize_t len = 0;
 166
 167         rcu_read_lock();
 168         deve = target_nacl_find_deve(se_nacl, lacl->mapped_lun);
 169         if (deve) {
 170                 len = sprintf(page, "%d\n",
 171                         (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ? 1 : 0);
 172         }
 173         rcu_read_unlock();
 174
 175         return len;
 176 }
 177
 178 static ssize_t target_fabric_mappedlun_write_protect_store(
 179                 struct config_item *item, const char *page, size_t count)
 180 {
 181         struct se_lun_acl *lacl = item_to_lun_acl(item);
 182         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 183         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 184         unsigned long op;
 185         int ret;
 186
 187         ret = kstrtoul(page, 0, &op);
 188         if (ret)
 189                 return ret;
 190
 191         if ((op != 1) && (op != 0))
 192                 return -EINVAL;
 193
 194         core_update_device_list_access(lacl->mapped_lun, (op) ?
 195                         TRANSPORT_LUNFLAGS_READ_ONLY :
 196                         TRANSPORT_LUNFLAGS_READ_WRITE,
 197                         lacl->se_lun_nacl);
 198
 199         pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
 200                 " Mapped LUN: %llu Write Protect bit to %s\n",
 201                 se_tpg->se_tpg_tfo->get_fabric_name(),
 202                 se_nacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
 203
 204         return count;
 205
 206 }
 207
 208 CONFIGFS_ATTR(target_fabric_mappedlun_, write_protect);
 209
 210 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
 211         &target_fabric_mappedlun_attr_write_protect,
 212         NULL,
 213 };
 214
 215 static void target_fabric_mappedlun_release(struct config_item *item)
 216 {
 217         struct se_lun_acl *lacl = container_of(to_config_group(item),
 218                                 struct se_lun_acl, se_lun_group);
 219         struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
 220
 221         core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
 222 }
 223
 224 static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
 225         .release                = target_fabric_mappedlun_release,
 226         .allow_link             = target_fabric_mappedlun_link,
 227         .drop_link              = target_fabric_mappedlun_unlink,
 228 };
 229
 230 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
 231                 target_fabric_mappedlun_attrs);
 232
 233 /* End of tfc_tpg_mappedlun_cit */
 234
 235 /* Start of tfc_tpg_mappedlun_port_cit */
 236
 237 static struct config_group *target_core_mappedlun_stat_mkdir(
 238         struct config_group *group,
 239         const char *name)
 240 {
 241         return ERR_PTR(-ENOSYS);
 242 }
 243
 244 static void target_core_mappedlun_stat_rmdir(
 245         struct config_group *group,
 246         struct config_item *item)
 247 {
 248         return;
 249 }
 250
 251 static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
 252         .make_group             = target_core_mappedlun_stat_mkdir,
 253         .drop_item              = target_core_mappedlun_stat_rmdir,
 254 };
 255
 256 TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
 257                 NULL);
 258
 259 /* End of tfc_tpg_mappedlun_port_cit */
 260
 261 TF_CIT_SETUP_DRV(tpg_nacl_attrib, NULL, NULL);
 262 TF_CIT_SETUP_DRV(tpg_nacl_auth, NULL, NULL);
 263 TF_CIT_SETUP_DRV(tpg_nacl_param, NULL, NULL);
 264
 265 /* Start of tfc_tpg_nacl_base_cit */
 266
 267 static struct config_group *target_fabric_make_mappedlun(
 268         struct config_group *group,
 269         const char *name)
 270 {
 271         struct se_node_acl *se_nacl = container_of(group,
 272                         struct se_node_acl, acl_group);
 273         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 274         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 275         struct se_lun_acl *lacl = NULL;
 276         char *buf;
 277         unsigned long long mapped_lun;
 278         int ret = 0;
 279
 280         buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
 281         if (!buf) {
 282                 pr_err("Unable to allocate memory for name buf\n");
 283                 return ERR_PTR(-ENOMEM);
 284         }
 285         snprintf(buf, strlen(name) + 1, "%s", name);
 286         /*
 287          * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
 288          */
 289         if (strstr(buf, "lun_") != buf) {
 290                 pr_err("Unable to locate \"lun_\" from buf: %s"
 291                         " name: %s\n", buf, name);
 292                 ret = -EINVAL;
 293                 goto out;
 294         }
 295         /*
 296          * Determine the Mapped LUN value.  This is what the SCSI Initiator
 297          * Port will actually see.
 298          */
 299         ret = kstrtoull(buf + 4, 0, &mapped_lun);
 300         if (ret)
 301                 goto out;
 302
 303         lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
 304                         mapped_lun, &ret);
 305         if (!lacl) {
 306                 ret = -EINVAL;
 307                 goto out;
 308         }
 309
 310         config_group_init_type_name(&lacl->se_lun_group, name,
 311                         &tf->tf_tpg_mappedlun_cit);
 312
 313         config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
 314                         "statistics", &tf->tf_tpg_mappedlun_stat_cit);
 315         configfs_add_default_group(&lacl->ml_stat_grps.stat_group,
 316                         &lacl->se_lun_group);
 317
 318         target_stat_setup_mappedlun_default_groups(lacl);
 319
 320         kfree(buf);
 321         return &lacl->se_lun_group;
 322 out:
 323         kfree(lacl);
 324         kfree(buf);
 325         return ERR_PTR(ret);
 326 }
 327
 328 static void target_fabric_drop_mappedlun(
 329         struct config_group *group,
 330         struct config_item *item)
 331 {
 332         struct se_lun_acl *lacl = container_of(to_config_group(item),
 333                         struct se_lun_acl, se_lun_group);
 334
 335         configfs_remove_default_groups(&lacl->ml_stat_grps.stat_group);
 336         configfs_remove_default_groups(&lacl->se_lun_group);
 337
 338         config_item_put(item);
 339 }
 340
 341 static void target_fabric_nacl_base_release(struct config_item *item)
 342 {
 343         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 344                         struct se_node_acl, acl_group);
 345         struct target_fabric_configfs *tf = se_nacl->se_tpg->se_tpg_wwn->wwn_tf;
 346
 347         if (tf->tf_ops->fabric_cleanup_nodeacl)
 348                 tf->tf_ops->fabric_cleanup_nodeacl(se_nacl);
 349         core_tpg_del_initiator_node_acl(se_nacl);
 350 }
 351
 352 static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
 353         .release                = target_fabric_nacl_base_release,
 354 };
 355
 356 static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
 357         .make_group             = target_fabric_make_mappedlun,
 358         .drop_item              = target_fabric_drop_mappedlun,
 359 };
 360
 361 TF_CIT_SETUP_DRV(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
 362                 &target_fabric_nacl_base_group_ops);
 363
 364 /* End of tfc_tpg_nacl_base_cit */
 365
 366 /* Start of tfc_node_fabric_stats_cit */
 367 /*
 368  * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
 369  * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
 370  */
 371 TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
 372
 373 /* End of tfc_wwn_fabric_stats_cit */
 374
 375 /* Start of tfc_tpg_nacl_cit */
 376
 377 static struct config_group *target_fabric_make_nodeacl(
 378         struct config_group *group,
 379         const char *name)
 380 {
 381         struct se_portal_group *se_tpg = container_of(group,
 382                         struct se_portal_group, tpg_acl_group);
 383         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 384         struct se_node_acl *se_nacl;
 385
 386         se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name);
 387         if (IS_ERR(se_nacl))
 388                 return ERR_CAST(se_nacl);
 389
 390         if (tf->tf_ops->fabric_init_nodeacl) {
 391                 int ret = tf->tf_ops->fabric_init_nodeacl(se_nacl, name);
 392                 if (ret) {
 393                         core_tpg_del_initiator_node_acl(se_nacl);
 394                         return ERR_PTR(ret);
 395                 }
 396         }
 397
 398         config_group_init_type_name(&se_nacl->acl_group, name,
 399                         &tf->tf_tpg_nacl_base_cit);
 400
 401         config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
 402                         &tf->tf_tpg_nacl_attrib_cit);
 403         configfs_add_default_group(&se_nacl->acl_attrib_group,
 404                         &se_nacl->acl_group);
 405
 406         config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
 407                         &tf->tf_tpg_nacl_auth_cit);
 408         configfs_add_default_group(&se_nacl->acl_auth_group,
 409                         &se_nacl->acl_group);
 410
 411         config_group_init_type_name(&se_nacl->acl_param_group, "param",
 412                         &tf->tf_tpg_nacl_param_cit);
 413         configfs_add_default_group(&se_nacl->acl_param_group,
 414                         &se_nacl->acl_group);
 415
 416         config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
 417                         "fabric_statistics", &tf->tf_tpg_nacl_stat_cit);
 418         configfs_add_default_group(&se_nacl->acl_fabric_stat_group,
 419                         &se_nacl->acl_group);
 420
 421         return &se_nacl->acl_group;
 422 }
 423
 424 static void target_fabric_drop_nodeacl(
 425         struct config_group *group,
 426         struct config_item *item)
 427 {
 428         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 429                         struct se_node_acl, acl_group);
 430
 431         configfs_remove_default_groups(&se_nacl->acl_group);
 432
 433         /*
 434          * struct se_node_acl free is done in target_fabric_nacl_base_release()
 435          */
 436         config_item_put(item);
 437 }
 438
 439 static struct configfs_group_operations target_fabric_nacl_group_ops = {
 440         .make_group     = target_fabric_make_nodeacl,
 441         .drop_item      = target_fabric_drop_nodeacl,
 442 };
 443
 444 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
 445
 446 /* End of tfc_tpg_nacl_cit */
 447
 448 /* Start of tfc_tpg_np_base_cit */
 449
 450 static void target_fabric_np_base_release(struct config_item *item)
 451 {
 452         struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
 453                                 struct se_tpg_np, tpg_np_group);
 454         struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
 455         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 456
 457         tf->tf_ops->fabric_drop_np(se_tpg_np);
 458 }
 459
 460 static struct configfs_item_operations target_fabric_np_base_item_ops = {
 461         .release                = target_fabric_np_base_release,
 462 };
 463
 464 TF_CIT_SETUP_DRV(tpg_np_base, &target_fabric_np_base_item_ops, NULL);
 465
 466 /* End of tfc_tpg_np_base_cit */
 467
 468 /* Start of tfc_tpg_np_cit */
 469
 470 static struct config_group *target_fabric_make_np(
 471         struct config_group *group,
 472         const char *name)
 473 {
 474         struct se_portal_group *se_tpg = container_of(group,
 475                                 struct se_portal_group, tpg_np_group);
 476         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 477         struct se_tpg_np *se_tpg_np;
 478
 479         if (!tf->tf_ops->fabric_make_np) {
 480                 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
 481                 return ERR_PTR(-ENOSYS);
 482         }
 483
 484         se_tpg_np = tf->tf_ops->fabric_make_np(se_tpg, group, name);
 485         if (!se_tpg_np || IS_ERR(se_tpg_np))
 486                 return ERR_PTR(-EINVAL);
 487
 488         se_tpg_np->tpg_np_parent = se_tpg;
 489         config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
 490                         &tf->tf_tpg_np_base_cit);
 491
 492         return &se_tpg_np->tpg_np_group;
 493 }
 494
 495 static void target_fabric_drop_np(
 496         struct config_group *group,
 497         struct config_item *item)
 498 {
 499         /*
 500          * struct se_tpg_np is released via target_fabric_np_base_release()
 501          */
 502         config_item_put(item);
 503 }
 504
 505 static struct configfs_group_operations target_fabric_np_group_ops = {
 506         .make_group     = &target_fabric_make_np,
 507         .drop_item      = &target_fabric_drop_np,
 508 };
 509
 510 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
 511
 512 /* End of tfc_tpg_np_cit */
 513
 514 /* Start of tfc_tpg_port_cit */
 515
 516 static struct se_lun *item_to_lun(struct config_item *item)
 517 {
 518         return container_of(to_config_group(item), struct se_lun,
 519                         lun_group);
 520 }
 521
 522 static ssize_t target_fabric_port_alua_tg_pt_gp_show(struct config_item *item,
 523                 char *page)
 524 {
 525         struct se_lun *lun = item_to_lun(item);
 526
 527         if (!lun || !lun->lun_se_dev)
 528                 return -ENODEV;
 529
 530         return core_alua_show_tg_pt_gp_info(lun, page);
 531 }
 532
 533 static ssize_t target_fabric_port_alua_tg_pt_gp_store(struct config_item *item,
 534                 const char *page, size_t count)
 535 {
 536         struct se_lun *lun = item_to_lun(item);
 537
 538         if (!lun || !lun->lun_se_dev)
 539                 return -ENODEV;
 540
 541         return core_alua_store_tg_pt_gp_info(lun, page, count);
 542 }
 543
 544 static ssize_t target_fabric_port_alua_tg_pt_offline_show(
 545                 struct config_item *item, char *page)
 546 {
 547         struct se_lun *lun = item_to_lun(item);
 548
 549         if (!lun || !lun->lun_se_dev)
 550                 return -ENODEV;
 551
 552         return core_alua_show_offline_bit(lun, page);
 553 }
 554
 555 static ssize_t target_fabric_port_alua_tg_pt_offline_store(
 556                 struct config_item *item, const char *page, size_t count)
 557 {
 558         struct se_lun *lun = item_to_lun(item);
 559
 560         if (!lun || !lun->lun_se_dev)
 561                 return -ENODEV;
 562
 563         return core_alua_store_offline_bit(lun, page, count);
 564 }
 565
 566 static ssize_t target_fabric_port_alua_tg_pt_status_show(
 567                 struct config_item *item, char *page)
 568 {
 569         struct se_lun *lun = item_to_lun(item);
 570
 571         if (!lun || !lun->lun_se_dev)
 572                 return -ENODEV;
 573
 574         return core_alua_show_secondary_status(lun, page);
 575 }
 576
 577 static ssize_t target_fabric_port_alua_tg_pt_status_store(
 578                 struct config_item *item, const char *page, size_t count)
 579 {
 580         struct se_lun *lun = item_to_lun(item);
 581
 582         if (!lun || !lun->lun_se_dev)
 583                 return -ENODEV;
 584
 585         return core_alua_store_secondary_status(lun, page, count);
 586 }
 587
 588 static ssize_t target_fabric_port_alua_tg_pt_write_md_show(
 589                 struct config_item *item, char *page)
 590 {
 591         struct se_lun *lun = item_to_lun(item);
 592
 593         if (!lun || !lun->lun_se_dev)
 594                 return -ENODEV;
 595
 596         return core_alua_show_secondary_write_metadata(lun, page);
 597 }
 598
 599 static ssize_t target_fabric_port_alua_tg_pt_write_md_store(
 600                 struct config_item *item, const char *page, size_t count)
 601 {
 602         struct se_lun *lun = item_to_lun(item);
 603
 604         if (!lun || !lun->lun_se_dev)
 605                 return -ENODEV;
 606
 607         return core_alua_store_secondary_write_metadata(lun, page, count);
 608 }
 609
 610 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_gp);
 611 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_offline);
 612 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_status);
 613 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_write_md);
 614
 615 static struct configfs_attribute *target_fabric_port_attrs[] = {
 616         &target_fabric_port_attr_alua_tg_pt_gp,
 617         &target_fabric_port_attr_alua_tg_pt_offline,
 618         &target_fabric_port_attr_alua_tg_pt_status,
 619         &target_fabric_port_attr_alua_tg_pt_write_md,
 620         NULL,
 621 };
 622
 623 static int target_fabric_port_link(
 624         struct config_item *lun_ci,
 625         struct config_item *se_dev_ci)
 626 {
 627         struct config_item *tpg_ci;
 628         struct se_lun *lun = container_of(to_config_group(lun_ci),
 629                                 struct se_lun, lun_group);
 630         struct se_portal_group *se_tpg;
 631         struct se_device *dev =
 632                 container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
 633         struct target_fabric_configfs *tf;
 634         int ret;
 635
 636         if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
 637                 pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
 638                         " %p to struct se_device: %p\n", se_dev_ci, dev);
 639                 return -EFAULT;
 640         }
 641
 642         if (!(dev->dev_flags & DF_CONFIGURED)) {
 643                 pr_err("se_device not configured yet, cannot port link\n");
 644                 return -ENODEV;
 645         }
 646
 647         tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
 648         se_tpg = container_of(to_config_group(tpg_ci),
 649                                 struct se_portal_group, tpg_group);
 650         tf = se_tpg->se_tpg_wwn->wwn_tf;
 651
 652         if (lun->lun_se_dev !=  NULL) {
 653                 pr_err("Port Symlink already exists\n");
 654                 return -EEXIST;
 655         }
 656
 657         ret = core_dev_add_lun(se_tpg, dev, lun);
 658         if (ret) {
 659                 pr_err("core_dev_add_lun() failed: %d\n", ret);
 660                 goto out;
 661         }
 662
 663         if (tf->tf_ops->fabric_post_link) {
 664                 /*
 665                  * Call the optional fabric_post_link() to allow a
 666                  * fabric module to setup any additional state once
 667                  * core_dev_add_lun() has been called..
 668                  */
 669                 tf->tf_ops->fabric_post_link(se_tpg, lun);
 670         }
 671
 672         return 0;
 673 out:
 674         return ret;
 675 }
 676
 677 static int target_fabric_port_unlink(
 678         struct config_item *lun_ci,
 679         struct config_item *se_dev_ci)
 680 {
 681         struct se_lun *lun = container_of(to_config_group(lun_ci),
 682                                 struct se_lun, lun_group);
 683         struct se_portal_group *se_tpg = lun->lun_tpg;
 684         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 685
 686         if (tf->tf_ops->fabric_pre_unlink) {
 687                 /*
 688                  * Call the optional fabric_pre_unlink() to allow a
 689                  * fabric module to release any additional stat before
 690                  * core_dev_del_lun() is called.
 691                 */
 692                 tf->tf_ops->fabric_pre_unlink(se_tpg, lun);
 693         }
 694
 695         core_dev_del_lun(se_tpg, lun);
 696         return 0;
 697 }
 698
 699 static void target_fabric_port_release(struct config_item *item)
 700 {
 701         struct se_lun *lun = container_of(to_config_group(item),
 702                                           struct se_lun, lun_group);
 703
 704         kfree_rcu(lun, rcu_head);
 705 }
 706
 707 static struct configfs_item_operations target_fabric_port_item_ops = {
 708         .release                = target_fabric_port_release,
 709         .allow_link             = target_fabric_port_link,
 710         .drop_link              = target_fabric_port_unlink,
 711 };
 712
 713 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
 714
 715 /* End of tfc_tpg_port_cit */
 716
 717 /* Start of tfc_tpg_port_stat_cit */
 718
 719 static struct config_group *target_core_port_stat_mkdir(
 720         struct config_group *group,
 721         const char *name)
 722 {
 723         return ERR_PTR(-ENOSYS);
 724 }
 725
 726 static void target_core_port_stat_rmdir(
 727         struct config_group *group,
 728         struct config_item *item)
 729 {
 730         return;
 731 }
 732
 733 static struct configfs_group_operations target_fabric_port_stat_group_ops = {
 734         .make_group             = target_core_port_stat_mkdir,
 735         .drop_item              = target_core_port_stat_rmdir,
 736 };
 737
 738 TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
 739
 740 /* End of tfc_tpg_port_stat_cit */
 741
 742 /* Start of tfc_tpg_lun_cit */
 743
 744 static struct config_group *target_fabric_make_lun(
 745         struct config_group *group,
 746         const char *name)
 747 {
 748         struct se_lun *lun;
 749         struct se_portal_group *se_tpg = container_of(group,
 750                         struct se_portal_group, tpg_lun_group);
 751         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 752         unsigned long long unpacked_lun;
 753         int errno;
 754
 755         if (strstr(name, "lun_") != name) {
 756                 pr_err("Unable to locate \'_\" in"
 757                                 " \"lun_$LUN_NUMBER\"\n");
 758                 return ERR_PTR(-EINVAL);
 759         }
 760         errno = kstrtoull(name + 4, 0, &unpacked_lun);
 761         if (errno)
 762                 return ERR_PTR(errno);
 763
 764         lun = core_tpg_alloc_lun(se_tpg, unpacked_lun);
 765         if (IS_ERR(lun))
 766                 return ERR_CAST(lun);
 767
 768         config_group_init_type_name(&lun->lun_group, name,
 769                         &tf->tf_tpg_port_cit);
 770
 771         config_group_init_type_name(&lun->port_stat_grps.stat_group,
 772                         "statistics", &tf->tf_tpg_port_stat_cit);
 773         configfs_add_default_group(&lun->port_stat_grps.stat_group,
 774                         &lun->lun_group);
 775
 776         target_stat_setup_port_default_groups(lun);
 777
 778         return &lun->lun_group;
 779 }
 780
 781 static void target_fabric_drop_lun(
 782         struct config_group *group,
 783         struct config_item *item)
 784 {
 785         struct se_lun *lun = container_of(to_config_group(item),
 786                                 struct se_lun, lun_group);
 787
 788         configfs_remove_default_groups(&lun->port_stat_grps.stat_group);
 789         configfs_remove_default_groups(&lun->lun_group);
 790
 791         config_item_put(item);
 792 }
 793
 794 static struct configfs_group_operations target_fabric_lun_group_ops = {
 795         .make_group     = &target_fabric_make_lun,
 796         .drop_item      = &target_fabric_drop_lun,
 797 };
 798
 799 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
 800
 801 /* End of tfc_tpg_lun_cit */
 802
 803 TF_CIT_SETUP_DRV(tpg_attrib, NULL, NULL);
 804 TF_CIT_SETUP_DRV(tpg_auth, NULL, NULL);
 805 TF_CIT_SETUP_DRV(tpg_param, NULL, NULL);
 806
 807 /* Start of tfc_tpg_base_cit */
 808
 809 static void target_fabric_tpg_release(struct config_item *item)
 810 {
 811         struct se_portal_group *se_tpg = container_of(to_config_group(item),
 812                         struct se_portal_group, tpg_group);
 813         struct se_wwn *wwn = se_tpg->se_tpg_wwn;
 814         struct target_fabric_configfs *tf = wwn->wwn_tf;
 815
 816         tf->tf_ops->fabric_drop_tpg(se_tpg);
 817 }
 818
 819 static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
 820         .release                = target_fabric_tpg_release,
 821 };
 822
 823 TF_CIT_SETUP_DRV(tpg_base, &target_fabric_tpg_base_item_ops, NULL);
 824
 825 /* End of tfc_tpg_base_cit */
 826
 827 /* Start of tfc_tpg_cit */
 828
 829 static struct config_group *target_fabric_make_tpg(
 830         struct config_group *group,
 831         const char *name)
 832 {
 833         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
 834         struct target_fabric_configfs *tf = wwn->wwn_tf;
 835         struct se_portal_group *se_tpg;
 836
 837         if (!tf->tf_ops->fabric_make_tpg) {
 838                 pr_err("tf->tf_ops->fabric_make_tpg is NULL\n");
 839                 return ERR_PTR(-ENOSYS);
 840         }
 841
 842         se_tpg = tf->tf_ops->fabric_make_tpg(wwn, group, name);
 843         if (!se_tpg || IS_ERR(se_tpg))
 844                 return ERR_PTR(-EINVAL);
 845
 846         config_group_init_type_name(&se_tpg->tpg_group, name,
 847                         &tf->tf_tpg_base_cit);
 848
 849         config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
 850                         &tf->tf_tpg_lun_cit);
 851         configfs_add_default_group(&se_tpg->tpg_lun_group,
 852                         &se_tpg->tpg_group);
 853
 854         config_group_init_type_name(&se_tpg->tpg_np_group, "np",
 855                         &tf->tf_tpg_np_cit);
 856         configfs_add_default_group(&se_tpg->tpg_np_group,
 857                         &se_tpg->tpg_group);
 858
 859         config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
 860                         &tf->tf_tpg_nacl_cit);
 861         configfs_add_default_group(&se_tpg->tpg_acl_group,
 862                         &se_tpg->tpg_group);
 863
 864         config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
 865                         &tf->tf_tpg_attrib_cit);
 866         configfs_add_default_group(&se_tpg->tpg_attrib_group,
 867                         &se_tpg->tpg_group);
 868
 869         config_group_init_type_name(&se_tpg->tpg_auth_group, "auth",
 870                         &tf->tf_tpg_auth_cit);
 871         configfs_add_default_group(&se_tpg->tpg_auth_group,
 872                         &se_tpg->tpg_group);
 873
 874         config_group_init_type_name(&se_tpg->tpg_param_group, "param",
 875                         &tf->tf_tpg_param_cit);
 876         configfs_add_default_group(&se_tpg->tpg_param_group,
 877                         &se_tpg->tpg_group);
 878
 879         return &se_tpg->tpg_group;
 880 }
 881
 882 static void target_fabric_drop_tpg(
 883         struct config_group *group,
 884         struct config_item *item)
 885 {
 886         struct se_portal_group *se_tpg = container_of(to_config_group(item),
 887                                 struct se_portal_group, tpg_group);
 888
 889         configfs_remove_default_groups(&se_tpg->tpg_group);
 890         config_item_put(item);
 891 }
 892
 893 static void target_fabric_release_wwn(struct config_item *item)
 894 {
 895         struct se_wwn *wwn = container_of(to_config_group(item),
 896                                 struct se_wwn, wwn_group);
 897         struct target_fabric_configfs *tf = wwn->wwn_tf;
 898
 899         tf->tf_ops->fabric_drop_wwn(wwn);
 900 }
 901
 902 static struct configfs_item_operations target_fabric_tpg_item_ops = {
 903         .release        = target_fabric_release_wwn,
 904 };
 905
 906 static struct configfs_group_operations target_fabric_tpg_group_ops = {
 907         .make_group     = target_fabric_make_tpg,
 908         .drop_item      = target_fabric_drop_tpg,
 909 };
 910
 911 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
 912                 NULL);
 913
 914 /* End of tfc_tpg_cit */
 915
 916 /* Start of tfc_wwn_fabric_stats_cit */
 917 /*
 918  * This is used as a placeholder for struct se_wwn->fabric_stat_group
 919  * to allow fabrics access to ->fabric_stat_group->default_groups[]
 920  */
 921 TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
 922
 923 /* End of tfc_wwn_fabric_stats_cit */
 924
 925 /* Start of tfc_wwn_cit */
 926
 927 static struct config_group *target_fabric_make_wwn(
 928         struct config_group *group,
 929         const char *name)
 930 {
 931         struct target_fabric_configfs *tf = container_of(group,
 932                                 struct target_fabric_configfs, tf_group);
 933         struct se_wwn *wwn;
 934
 935         if (!tf->tf_ops->fabric_make_wwn) {
 936                 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
 937                 return ERR_PTR(-ENOSYS);
 938         }
 939
 940         wwn = tf->tf_ops->fabric_make_wwn(tf, group, name);
 941         if (!wwn || IS_ERR(wwn))
 942                 return ERR_PTR(-EINVAL);
 943
 944         wwn->wwn_tf = tf;
 945
 946         config_group_init_type_name(&wwn->wwn_group, name, &tf->tf_tpg_cit);
 947
 948         config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
 949                         &tf->tf_wwn_fabric_stats_cit);
 950         configfs_add_default_group(&wwn->fabric_stat_group, &wwn->wwn_group);
 951
 952         return &wwn->wwn_group;
 953 }
 954
 955 static void target_fabric_drop_wwn(
 956         struct config_group *group,
 957         struct config_item *item)
 958 {
 959         struct se_wwn *wwn = container_of(to_config_group(item),
 960                                 struct se_wwn, wwn_group);
 961
 962         configfs_remove_default_groups(&wwn->wwn_group);
 963         config_item_put(item);
 964 }
 965
 966 static struct configfs_group_operations target_fabric_wwn_group_ops = {
 967         .make_group     = target_fabric_make_wwn,
 968         .drop_item      = target_fabric_drop_wwn,
 969 };
 970
 971 TF_CIT_SETUP_DRV(wwn, NULL, &target_fabric_wwn_group_ops);
 972 TF_CIT_SETUP_DRV(discovery, NULL, NULL);
 973
 974 int target_fabric_setup_cits(struct target_fabric_configfs *tf)
 975 {
 976         target_fabric_setup_discovery_cit(tf);
 977         target_fabric_setup_wwn_cit(tf);
 978         target_fabric_setup_wwn_fabric_stats_cit(tf);
 979         target_fabric_setup_tpg_cit(tf);
 980         target_fabric_setup_tpg_base_cit(tf);
 981         target_fabric_setup_tpg_port_cit(tf);
 982         target_fabric_setup_tpg_port_stat_cit(tf);
 983         target_fabric_setup_tpg_lun_cit(tf);
 984         target_fabric_setup_tpg_np_cit(tf);
 985         target_fabric_setup_tpg_np_base_cit(tf);
 986         target_fabric_setup_tpg_attrib_cit(tf);
 987         target_fabric_setup_tpg_auth_cit(tf);
 988         target_fabric_setup_tpg_param_cit(tf);
 989         target_fabric_setup_tpg_nacl_cit(tf);
 990         target_fabric_setup_tpg_nacl_base_cit(tf);
 991         target_fabric_setup_tpg_nacl_attrib_cit(tf);
 992         target_fabric_setup_tpg_nacl_auth_cit(tf);
 993         target_fabric_setup_tpg_nacl_param_cit(tf);
 994         target_fabric_setup_tpg_nacl_stat_cit(tf);
 995         target_fabric_setup_tpg_mappedlun_cit(tf);
 996         target_fabric_setup_tpg_mappedlun_stat_cit(tf);
 997
 998         return 0;
 999 }