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  * Copyright (c) 2010 Rising Tide Systems
   8  * Copyright (c) 2010 Linux-iSCSI.org
   9  *
  10  * Copyright (c) 2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
  11 *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <linux/version.h>
  26 #include <generated/utsrelease.h>
  27 #include <linux/utsname.h>
  28 #include <linux/init.h>
  29 #include <linux/fs.h>
  30 #include <linux/namei.h>
  31 #include <linux/slab.h>
  32 #include <linux/types.h>
  33 #include <linux/delay.h>
  34 #include <linux/unistd.h>
  35 #include <linux/string.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_device.h>
  41 #include <target/target_core_tpg.h>
  42 #include <target/target_core_transport.h>
  43 #include <target/target_core_fabric_ops.h>
  44 #include <target/target_core_fabric_configfs.h>
  45 #include <target/target_core_configfs.h>
  46 #include <target/configfs_macros.h>
  47
  48 #include "target_core_alua.h"
  49 #include "target_core_hba.h"
  50 #include "target_core_pr.h"
  51
  52 #define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  53 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
  54 {                                                                       \
  55         struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
  56         struct config_item_type *cit = &tfc->tfc_##_name##_cit;         \
  57                                                                         \
  58         cit->ct_item_ops = _item_ops;                                   \
  59         cit->ct_group_ops = _group_ops;                                 \
  60         cit->ct_attrs = _attrs;                                         \
  61         cit->ct_owner = tf->tf_module;                                  \
  62         printk("Setup generic %s\n", __stringify(_name));               \
  63 }
  64
  65 /* Start of tfc_tpg_mappedlun_cit */
  66
  67 static int target_fabric_mappedlun_link(
  68         struct config_item *lun_acl_ci,
  69         struct config_item *lun_ci)
  70 {
  71         struct se_dev_entry *deve;
  72         struct se_lun *lun = container_of(to_config_group(lun_ci),
  73                         struct se_lun, lun_group);
  74         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
  75                         struct se_lun_acl, se_lun_group);
  76         struct se_portal_group *se_tpg;
  77         struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
  78         int ret = 0, lun_access;
  79         /*
  80          * Ensure that the source port exists
  81          */
  82         if (!(lun->lun_sep) || !(lun->lun_sep->sep_tpg)) {
  83                 printk(KERN_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_$TPGT
  96          */
  97         if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
  98                 printk(KERN_ERR "Illegal Initiator ACL SymLink outside of %s\n",
  99                         config_item_name(wwn_ci));
 100                 return -EINVAL;
 101         }
 102         if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
 103                 printk(KERN_ERR "Illegal Initiator ACL Symlink outside of %s"
 104                         " TPGT: %s\n", config_item_name(wwn_ci),
 105                         config_item_name(tpg_ci));
 106                 return -EINVAL;
 107         }
 108         /*
 109          * If this struct se_node_acl was dynamically generated with
 110          * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
 111          * which be will write protected (READ-ONLY) when
 112          * tpg_1/attrib/demo_mode_write_protect=1
 113          */
 114         spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
 115         deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun];
 116         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
 117                 lun_access = deve->lun_flags;
 118         else
 119                 lun_access =
 120                         (TPG_TFO(se_tpg)->tpg_check_prod_mode_write_protect(
 121                                 se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
 122                                            TRANSPORT_LUNFLAGS_READ_WRITE;
 123         spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
 124         /*
 125          * Determine the actual mapped LUN value user wants..
 126          *
 127          * This value is what the SCSI Initiator actually sees the
 128          * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
 129          */
 130         ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
 131                         lun->unpacked_lun, lun_access);
 132
 133         return (ret < 0) ? -EINVAL : 0;
 134 }
 135
 136 static int target_fabric_mappedlun_unlink(
 137         struct config_item *lun_acl_ci,
 138         struct config_item *lun_ci)
 139 {
 140         struct se_lun *lun;
 141         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
 142                         struct se_lun_acl, se_lun_group);
 143         struct se_node_acl *nacl = lacl->se_lun_nacl;
 144         struct se_dev_entry *deve = &nacl->device_list[lacl->mapped_lun];
 145         struct se_portal_group *se_tpg;
 146         /*
 147          * Determine if the underlying MappedLUN has already been released..
 148          */
 149         if (!(deve->se_lun))
 150                 return 0;
 151
 152         lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
 153         se_tpg = lun->lun_sep->sep_tpg;
 154
 155         core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
 156         return 0;
 157 }
 158
 159 CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
 160 #define TCM_MAPPEDLUN_ATTR(_name, _mode)                                \
 161 static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
 162         __CONFIGFS_EATTR(_name, _mode,                                  \
 163         target_fabric_mappedlun_show_##_name,                           \
 164         target_fabric_mappedlun_store_##_name);
 165
 166 static ssize_t target_fabric_mappedlun_show_write_protect(
 167         struct se_lun_acl *lacl,
 168         char *page)
 169 {
 170         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 171         struct se_dev_entry *deve;
 172         ssize_t len;
 173
 174         spin_lock_irq(&se_nacl->device_list_lock);
 175         deve = &se_nacl->device_list[lacl->mapped_lun];
 176         len = sprintf(page, "%d\n",
 177                         (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
 178                         1 : 0);
 179         spin_unlock_irq(&se_nacl->device_list_lock);
 180
 181         return len;
 182 }
 183
 184 static ssize_t target_fabric_mappedlun_store_write_protect(
 185         struct se_lun_acl *lacl,
 186         const char *page,
 187         size_t count)
 188 {
 189         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
 190         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 191         unsigned long op;
 192
 193         if (strict_strtoul(page, 0, &op))
 194                 return -EINVAL;
 195
 196         if ((op != 1) && (op != 0))
 197                 return -EINVAL;
 198
 199         core_update_device_list_access(lacl->mapped_lun, (op) ?
 200                         TRANSPORT_LUNFLAGS_READ_ONLY :
 201                         TRANSPORT_LUNFLAGS_READ_WRITE,
 202                         lacl->se_lun_nacl);
 203
 204         printk(KERN_INFO "%s_ConfigFS: Changed Initiator ACL: %s"
 205                 " Mapped LUN: %u Write Protect bit to %s\n",
 206                 TPG_TFO(se_tpg)->get_fabric_name(),
 207                 lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
 208
 209         return count;
 210
 211 }
 212
 213 TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
 214
 215 CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
 216
 217 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
 218         &target_fabric_mappedlun_write_protect.attr,
 219         NULL,
 220 };
 221
 222 static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
 223         .show_attribute         = target_fabric_mappedlun_attr_show,
 224         .store_attribute        = target_fabric_mappedlun_attr_store,
 225         .allow_link             = target_fabric_mappedlun_link,
 226         .drop_link              = target_fabric_mappedlun_unlink,
 227 };
 228
 229 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
 230                 target_fabric_mappedlun_attrs);
 231
 232 /* End of tfc_tpg_mappedlun_cit */
 233
 234 /* Start of tfc_tpg_nacl_attrib_cit */
 235
 236 CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
 237
 238 static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
 239         .show_attribute         = target_fabric_nacl_attrib_attr_show,
 240         .store_attribute        = target_fabric_nacl_attrib_attr_store,
 241 };
 242
 243 TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
 244
 245 /* End of tfc_tpg_nacl_attrib_cit */
 246
 247 /* Start of tfc_tpg_nacl_auth_cit */
 248
 249 CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
 250
 251 static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
 252         .show_attribute         = target_fabric_nacl_auth_attr_show,
 253         .store_attribute        = target_fabric_nacl_auth_attr_store,
 254 };
 255
 256 TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
 257
 258 /* End of tfc_tpg_nacl_auth_cit */
 259
 260 /* Start of tfc_tpg_nacl_param_cit */
 261
 262 CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
 263
 264 static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
 265         .show_attribute         = target_fabric_nacl_param_attr_show,
 266         .store_attribute        = target_fabric_nacl_param_attr_store,
 267 };
 268
 269 TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
 270
 271 /* End of tfc_tpg_nacl_param_cit */
 272
 273 /* Start of tfc_tpg_nacl_base_cit */
 274
 275 CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
 276
 277 static struct config_group *target_fabric_make_mappedlun(
 278         struct config_group *group,
 279         const char *name)
 280 {
 281         struct se_node_acl *se_nacl = container_of(group,
 282                         struct se_node_acl, acl_group);
 283         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 284         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 285         struct se_lun_acl *lacl;
 286         struct config_item *acl_ci;
 287         char *buf;
 288         unsigned long mapped_lun;
 289         int ret = 0;
 290
 291         acl_ci = &group->cg_item;
 292         if (!(acl_ci)) {
 293                 printk(KERN_ERR "Unable to locatel acl_ci\n");
 294                 return NULL;
 295         }
 296
 297         buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
 298         if (!(buf)) {
 299                 printk(KERN_ERR "Unable to allocate memory for name buf\n");
 300                 return ERR_PTR(-ENOMEM);
 301         }
 302         snprintf(buf, strlen(name) + 1, "%s", name);
 303         /*
 304          * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
 305          */
 306         if (strstr(buf, "lun_") != buf) {
 307                 printk(KERN_ERR "Unable to locate \"lun_\" from buf: %s"
 308                         " name: %s\n", buf, name);
 309                 ret = -EINVAL;
 310                 goto out;
 311         }
 312         /*
 313          * Determine the Mapped LUN value.  This is what the SCSI Initiator
 314          * Port will actually see.
 315          */
 316         if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
 317                 ret = -EINVAL;
 318                 goto out;
 319         }
 320
 321         lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
 322                         config_item_name(acl_ci), &ret);
 323         if (!(lacl))
 324                 goto out;
 325
 326         config_group_init_type_name(&lacl->se_lun_group, name,
 327                         &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
 328
 329         kfree(buf);
 330         return &lacl->se_lun_group;
 331 out:
 332         kfree(buf);
 333         return ERR_PTR(ret);
 334 }
 335
 336 static void target_fabric_drop_mappedlun(
 337         struct config_group *group,
 338         struct config_item *item)
 339 {
 340         struct se_lun_acl *lacl = container_of(to_config_group(item),
 341                         struct se_lun_acl, se_lun_group);
 342         struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
 343
 344         config_item_put(item);
 345         core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
 346 }
 347
 348 static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
 349         .show_attribute         = target_fabric_nacl_base_attr_show,
 350         .store_attribute        = target_fabric_nacl_base_attr_store,
 351 };
 352
 353 static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
 354         .make_group             = target_fabric_make_mappedlun,
 355         .drop_item              = target_fabric_drop_mappedlun,
 356 };
 357
 358 TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
 359                 &target_fabric_nacl_base_group_ops, NULL);
 360
 361 /* End of tfc_tpg_nacl_base_cit */
 362
 363 /* Start of tfc_tpg_nacl_cit */
 364
 365 static struct config_group *target_fabric_make_nodeacl(
 366         struct config_group *group,
 367         const char *name)
 368 {
 369         struct se_portal_group *se_tpg = container_of(group,
 370                         struct se_portal_group, tpg_acl_group);
 371         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 372         struct se_node_acl *se_nacl;
 373         struct config_group *nacl_cg;
 374
 375         if (!(tf->tf_ops.fabric_make_nodeacl)) {
 376                 printk(KERN_ERR "tf->tf_ops.fabric_make_nodeacl is NULL\n");
 377                 return ERR_PTR(-ENOSYS);
 378         }
 379
 380         se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
 381         if (IS_ERR(se_nacl))
 382                 return ERR_PTR(PTR_ERR(se_nacl));
 383
 384         nacl_cg = &se_nacl->acl_group;
 385         nacl_cg->default_groups = se_nacl->acl_default_groups;
 386         nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
 387         nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
 388         nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
 389         nacl_cg->default_groups[3] = NULL;
 390
 391         config_group_init_type_name(&se_nacl->acl_group, name,
 392                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
 393         config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
 394                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
 395         config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
 396                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
 397         config_group_init_type_name(&se_nacl->acl_param_group, "param",
 398                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
 399
 400         return &se_nacl->acl_group;
 401 }
 402
 403 static void target_fabric_drop_nodeacl(
 404         struct config_group *group,
 405         struct config_item *item)
 406 {
 407         struct se_portal_group *se_tpg = container_of(group,
 408                         struct se_portal_group, tpg_acl_group);
 409         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 410         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 411                         struct se_node_acl, acl_group);
 412         struct config_item *df_item;
 413         struct config_group *nacl_cg;
 414         int i;
 415
 416         nacl_cg = &se_nacl->acl_group;
 417         for (i = 0; nacl_cg->default_groups[i]; i++) {
 418                 df_item = &nacl_cg->default_groups[i]->cg_item;
 419                 nacl_cg->default_groups[i] = NULL;
 420                 config_item_put(df_item);
 421         }
 422
 423         config_item_put(item);
 424         tf->tf_ops.fabric_drop_nodeacl(se_nacl);
 425 }
 426
 427 static struct configfs_group_operations target_fabric_nacl_group_ops = {
 428         .make_group     = target_fabric_make_nodeacl,
 429         .drop_item      = target_fabric_drop_nodeacl,
 430 };
 431
 432 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
 433
 434 /* End of tfc_tpg_nacl_cit */
 435
 436 /* Start of tfc_tpg_np_base_cit */
 437
 438 CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
 439
 440 static struct configfs_item_operations target_fabric_np_base_item_ops = {
 441         .show_attribute         = target_fabric_np_base_attr_show,
 442         .store_attribute        = target_fabric_np_base_attr_store,
 443 };
 444
 445 TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
 446
 447 /* End of tfc_tpg_np_base_cit */
 448
 449 /* Start of tfc_tpg_np_cit */
 450
 451 static struct config_group *target_fabric_make_np(
 452         struct config_group *group,
 453         const char *name)
 454 {
 455         struct se_portal_group *se_tpg = container_of(group,
 456                                 struct se_portal_group, tpg_np_group);
 457         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 458         struct se_tpg_np *se_tpg_np;
 459
 460         if (!(tf->tf_ops.fabric_make_np)) {
 461                 printk(KERN_ERR "tf->tf_ops.fabric_make_np is NULL\n");
 462                 return ERR_PTR(-ENOSYS);
 463         }
 464
 465         se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
 466         if (!(se_tpg_np) || IS_ERR(se_tpg_np))
 467                 return ERR_PTR(-EINVAL);
 468
 469         config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
 470                         &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
 471
 472         return &se_tpg_np->tpg_np_group;
 473 }
 474
 475 static void target_fabric_drop_np(
 476         struct config_group *group,
 477         struct config_item *item)
 478 {
 479         struct se_portal_group *se_tpg = container_of(group,
 480                                 struct se_portal_group, tpg_np_group);
 481         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 482         struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
 483                                 struct se_tpg_np, tpg_np_group);
 484
 485         config_item_put(item);
 486         tf->tf_ops.fabric_drop_np(se_tpg_np);
 487 }
 488
 489 static struct configfs_group_operations target_fabric_np_group_ops = {
 490         .make_group     = &target_fabric_make_np,
 491         .drop_item      = &target_fabric_drop_np,
 492 };
 493
 494 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
 495
 496 /* End of tfc_tpg_np_cit */
 497
 498 /* Start of tfc_tpg_port_cit */
 499
 500 CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
 501 #define TCM_PORT_ATTR(_name, _mode)                                     \
 502 static struct target_fabric_port_attribute target_fabric_port_##_name = \
 503         __CONFIGFS_EATTR(_name, _mode,                                  \
 504         target_fabric_port_show_attr_##_name,                           \
 505         target_fabric_port_store_attr_##_name);
 506
 507 #define TCM_PORT_ATTOR_RO(_name)                                        \
 508         __CONFIGFS_EATTR_RO(_name,                                      \
 509         target_fabric_port_show_attr_##_name);
 510
 511 /*
 512  * alua_tg_pt_gp
 513  */
 514 static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
 515         struct se_lun *lun,
 516         char *page)
 517 {
 518         if (!(lun))
 519                 return -ENODEV;
 520
 521         if (!(lun->lun_sep))
 522                 return -ENODEV;
 523
 524         return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
 525 }
 526
 527 static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
 528         struct se_lun *lun,
 529         const char *page,
 530         size_t count)
 531 {
 532         if (!(lun))
 533                 return -ENODEV;
 534
 535         if (!(lun->lun_sep))
 536                 return -ENODEV;
 537
 538         return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
 539 }
 540
 541 TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
 542
 543 /*
 544  * alua_tg_pt_offline
 545  */
 546 static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
 547         struct se_lun *lun,
 548         char *page)
 549 {
 550         if (!(lun))
 551                 return -ENODEV;
 552
 553         if (!(lun->lun_sep))
 554                 return -ENODEV;
 555
 556         return core_alua_show_offline_bit(lun, page);
 557 }
 558
 559 static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
 560         struct se_lun *lun,
 561         const char *page,
 562         size_t count)
 563 {
 564         if (!(lun))
 565                 return -ENODEV;
 566
 567         if (!(lun->lun_sep))
 568                 return -ENODEV;
 569
 570         return core_alua_store_offline_bit(lun, page, count);
 571 }
 572
 573 TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
 574
 575 /*
 576  * alua_tg_pt_status
 577  */
 578 static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
 579         struct se_lun *lun,
 580         char *page)
 581 {
 582         if (!(lun))
 583                 return -ENODEV;
 584
 585         if (!(lun->lun_sep))
 586                 return -ENODEV;
 587
 588         return core_alua_show_secondary_status(lun, page);
 589 }
 590
 591 static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
 592         struct se_lun *lun,
 593         const char *page,
 594         size_t count)
 595 {
 596         if (!(lun))
 597                 return -ENODEV;
 598
 599         if (!(lun->lun_sep))
 600                 return -ENODEV;
 601
 602         return core_alua_store_secondary_status(lun, page, count);
 603 }
 604
 605 TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
 606
 607 /*
 608  * alua_tg_pt_write_md
 609  */
 610 static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
 611         struct se_lun *lun,
 612         char *page)
 613 {
 614         if (!(lun))
 615                 return -ENODEV;
 616
 617         if (!(lun->lun_sep))
 618                 return -ENODEV;
 619
 620         return core_alua_show_secondary_write_metadata(lun, page);
 621 }
 622
 623 static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
 624         struct se_lun *lun,
 625         const char *page,
 626         size_t count)
 627 {
 628         if (!(lun))
 629                 return -ENODEV;
 630
 631         if (!(lun->lun_sep))
 632                 return -ENODEV;
 633
 634         return core_alua_store_secondary_write_metadata(lun, page, count);
 635 }
 636
 637 TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
 638
 639
 640 static struct configfs_attribute *target_fabric_port_attrs[] = {
 641         &target_fabric_port_alua_tg_pt_gp.attr,
 642         &target_fabric_port_alua_tg_pt_offline.attr,
 643         &target_fabric_port_alua_tg_pt_status.attr,
 644         &target_fabric_port_alua_tg_pt_write_md.attr,
 645         NULL,
 646 };
 647
 648 CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
 649
 650 static int target_fabric_port_link(
 651         struct config_item *lun_ci,
 652         struct config_item *se_dev_ci)
 653 {
 654         struct config_item *tpg_ci;
 655         struct se_device *dev;
 656         struct se_lun *lun = container_of(to_config_group(lun_ci),
 657                                 struct se_lun, lun_group);
 658         struct se_lun *lun_p;
 659         struct se_portal_group *se_tpg;
 660         struct se_subsystem_dev *se_dev = container_of(
 661                                 to_config_group(se_dev_ci), struct se_subsystem_dev,
 662                                 se_dev_group);
 663         struct target_fabric_configfs *tf;
 664         int ret;
 665
 666         tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
 667         se_tpg = container_of(to_config_group(tpg_ci),
 668                                 struct se_portal_group, tpg_group);
 669         tf = se_tpg->se_tpg_wwn->wwn_tf;
 670
 671         if (lun->lun_se_dev !=  NULL) {
 672                 printk(KERN_ERR "Port Symlink already exists\n");
 673                 return -EEXIST;
 674         }
 675
 676         dev = se_dev->se_dev_ptr;
 677         if (!(dev)) {
 678                 printk(KERN_ERR "Unable to locate struct se_device pointer from"
 679                         " %s\n", config_item_name(se_dev_ci));
 680                 ret = -ENODEV;
 681                 goto out;
 682         }
 683
 684         lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
 685                                 lun->unpacked_lun);
 686         if ((IS_ERR(lun_p)) || !(lun_p)) {
 687                 printk(KERN_ERR "core_dev_add_lun() failed\n");
 688                 ret = -EINVAL;
 689                 goto out;
 690         }
 691
 692         if (tf->tf_ops.fabric_post_link) {
 693                 /*
 694                  * Call the optional fabric_post_link() to allow a
 695                  * fabric module to setup any additional state once
 696                  * core_dev_add_lun() has been called..
 697                  */
 698                 tf->tf_ops.fabric_post_link(se_tpg, lun);
 699         }
 700
 701         return 0;
 702 out:
 703         return ret;
 704 }
 705
 706 static int target_fabric_port_unlink(
 707         struct config_item *lun_ci,
 708         struct config_item *se_dev_ci)
 709 {
 710         struct se_lun *lun = container_of(to_config_group(lun_ci),
 711                                 struct se_lun, lun_group);
 712         struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
 713         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 714
 715         if (tf->tf_ops.fabric_pre_unlink) {
 716                 /*
 717                  * Call the optional fabric_pre_unlink() to allow a
 718                  * fabric module to release any additional stat before
 719                  * core_dev_del_lun() is called.
 720                 */
 721                 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
 722         }
 723
 724         core_dev_del_lun(se_tpg, lun->unpacked_lun);
 725         return 0;
 726 }
 727
 728 static struct configfs_item_operations target_fabric_port_item_ops = {
 729         .show_attribute         = target_fabric_port_attr_show,
 730         .store_attribute        = target_fabric_port_attr_store,
 731         .allow_link             = target_fabric_port_link,
 732         .drop_link              = target_fabric_port_unlink,
 733 };
 734
 735 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
 736
 737 /* End of tfc_tpg_port_cit */
 738
 739 /* Start of tfc_tpg_lun_cit */
 740
 741 static struct config_group *target_fabric_make_lun(
 742         struct config_group *group,
 743         const char *name)
 744 {
 745         struct se_lun *lun;
 746         struct se_portal_group *se_tpg = container_of(group,
 747                         struct se_portal_group, tpg_lun_group);
 748         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 749         unsigned long unpacked_lun;
 750
 751         if (strstr(name, "lun_") != name) {
 752                 printk(KERN_ERR "Unable to locate \'_\" in"
 753                                 " \"lun_$LUN_NUMBER\"\n");
 754                 return ERR_PTR(-EINVAL);
 755         }
 756         if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
 757                 return ERR_PTR(-EINVAL);
 758
 759         lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
 760         if (!(lun))
 761                 return ERR_PTR(-EINVAL);
 762
 763         config_group_init_type_name(&lun->lun_group, name,
 764                         &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
 765
 766         return &lun->lun_group;
 767 }
 768
 769 static void target_fabric_drop_lun(
 770         struct config_group *group,
 771         struct config_item *item)
 772 {
 773         config_item_put(item);
 774 }
 775
 776 static struct configfs_group_operations target_fabric_lun_group_ops = {
 777         .make_group     = &target_fabric_make_lun,
 778         .drop_item      = &target_fabric_drop_lun,
 779 };
 780
 781 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
 782
 783 /* End of tfc_tpg_lun_cit */
 784
 785 /* Start of tfc_tpg_attrib_cit */
 786
 787 CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
 788
 789 static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
 790         .show_attribute         = target_fabric_tpg_attrib_attr_show,
 791         .store_attribute        = target_fabric_tpg_attrib_attr_store,
 792 };
 793
 794 TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
 795
 796 /* End of tfc_tpg_attrib_cit */
 797
 798 /* Start of tfc_tpg_param_cit */
 799
 800 CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
 801
 802 static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
 803         .show_attribute         = target_fabric_tpg_param_attr_show,
 804         .store_attribute        = target_fabric_tpg_param_attr_store,
 805 };
 806
 807 TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
 808
 809 /* End of tfc_tpg_param_cit */
 810
 811 /* Start of tfc_tpg_base_cit */
 812 /*
 813  * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
 814  */
 815 CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
 816
 817 static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
 818         .show_attribute         = target_fabric_tpg_attr_show,
 819         .store_attribute        = target_fabric_tpg_attr_store,
 820 };
 821
 822 TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
 823
 824 /* End of tfc_tpg_base_cit */
 825
 826 /* Start of tfc_tpg_cit */
 827
 828 static struct config_group *target_fabric_make_tpg(
 829         struct config_group *group,
 830         const char *name)
 831 {
 832         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
 833         struct target_fabric_configfs *tf = wwn->wwn_tf;
 834         struct se_portal_group *se_tpg;
 835
 836         if (!(tf->tf_ops.fabric_make_tpg)) {
 837                 printk(KERN_ERR "tf->tf_ops.fabric_make_tpg is NULL\n");
 838                 return ERR_PTR(-ENOSYS);
 839         }
 840
 841         se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
 842         if (!(se_tpg) || IS_ERR(se_tpg))
 843                 return ERR_PTR(-EINVAL);
 844         /*
 845          * Setup default groups from pre-allocated se_tpg->tpg_default_groups
 846          */
 847         se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
 848         se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
 849         se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
 850         se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
 851         se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
 852         se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
 853         se_tpg->tpg_group.default_groups[5] = NULL;
 854
 855         config_group_init_type_name(&se_tpg->tpg_group, name,
 856                         &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
 857         config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
 858                         &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
 859         config_group_init_type_name(&se_tpg->tpg_np_group, "np",
 860                         &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
 861         config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
 862                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
 863         config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
 864                         &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
 865         config_group_init_type_name(&se_tpg->tpg_param_group, "param",
 866                         &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
 867
 868         return &se_tpg->tpg_group;
 869 }
 870
 871 static void target_fabric_drop_tpg(
 872         struct config_group *group,
 873         struct config_item *item)
 874 {
 875         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
 876         struct target_fabric_configfs *tf = wwn->wwn_tf;
 877         struct se_portal_group *se_tpg = container_of(to_config_group(item),
 878                                 struct se_portal_group, tpg_group);
 879         struct config_group *tpg_cg = &se_tpg->tpg_group;
 880         struct config_item *df_item;
 881         int i;
 882         /*
 883          * Release default groups, but do not release tpg_cg->default_groups
 884          * memory as it is statically allocated at se_tpg->tpg_default_groups.
 885          */
 886         for (i = 0; tpg_cg->default_groups[i]; i++) {
 887                 df_item = &tpg_cg->default_groups[i]->cg_item;
 888                 tpg_cg->default_groups[i] = NULL;
 889                 config_item_put(df_item);
 890         }
 891
 892         config_item_put(item);
 893         tf->tf_ops.fabric_drop_tpg(se_tpg);
 894 }
 895
 896 static struct configfs_group_operations target_fabric_tpg_group_ops = {
 897         .make_group     = target_fabric_make_tpg,
 898         .drop_item      = target_fabric_drop_tpg,
 899 };
 900
 901 TF_CIT_SETUP(tpg, NULL, &target_fabric_tpg_group_ops, NULL);
 902
 903 /* End of tfc_tpg_cit */
 904
 905 /* Start of tfc_wwn_cit */
 906
 907 static struct config_group *target_fabric_make_wwn(
 908         struct config_group *group,
 909         const char *name)
 910 {
 911         struct target_fabric_configfs *tf = container_of(group,
 912                                 struct target_fabric_configfs, tf_group);
 913         struct se_wwn *wwn;
 914
 915         if (!(tf->tf_ops.fabric_make_wwn)) {
 916                 printk(KERN_ERR "tf->tf_ops.fabric_make_wwn is NULL\n");
 917                 return ERR_PTR(-ENOSYS);
 918         }
 919
 920         wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
 921         if (!(wwn) || IS_ERR(wwn))
 922                 return ERR_PTR(-EINVAL);
 923
 924         wwn->wwn_tf = tf;
 925         config_group_init_type_name(&wwn->wwn_group, name,
 926                         &TF_CIT_TMPL(tf)->tfc_tpg_cit);
 927
 928         return &wwn->wwn_group;
 929 }
 930
 931 static void target_fabric_drop_wwn(
 932         struct config_group *group,
 933         struct config_item *item)
 934 {
 935         struct target_fabric_configfs *tf = container_of(group,
 936                                 struct target_fabric_configfs, tf_group);
 937         struct se_wwn *wwn = container_of(to_config_group(item),
 938                                 struct se_wwn, wwn_group);
 939
 940         config_item_put(item);
 941         tf->tf_ops.fabric_drop_wwn(wwn);
 942 }
 943
 944 static struct configfs_group_operations target_fabric_wwn_group_ops = {
 945         .make_group     = target_fabric_make_wwn,
 946         .drop_item      = target_fabric_drop_wwn,
 947 };
 948 /*
 949  * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
 950  */
 951 CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
 952
 953 static struct configfs_item_operations target_fabric_wwn_item_ops = {
 954         .show_attribute         = target_fabric_wwn_attr_show,
 955         .store_attribute        = target_fabric_wwn_attr_store,
 956 };
 957
 958 TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
 959
 960 /* End of tfc_wwn_cit */
 961
 962 /* Start of tfc_discovery_cit */
 963
 964 CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
 965                 tf_disc_group);
 966
 967 static struct configfs_item_operations target_fabric_discovery_item_ops = {
 968         .show_attribute         = target_fabric_discovery_attr_show,
 969         .store_attribute        = target_fabric_discovery_attr_store,
 970 };
 971
 972 TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
 973
 974 /* End of tfc_discovery_cit */
 975
 976 int target_fabric_setup_cits(struct target_fabric_configfs *tf)
 977 {
 978         target_fabric_setup_discovery_cit(tf);
 979         target_fabric_setup_wwn_cit(tf);
 980         target_fabric_setup_tpg_cit(tf);
 981         target_fabric_setup_tpg_base_cit(tf);
 982         target_fabric_setup_tpg_port_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_param_cit(tf);
 988         target_fabric_setup_tpg_nacl_cit(tf);
 989         target_fabric_setup_tpg_nacl_base_cit(tf);
 990         target_fabric_setup_tpg_nacl_attrib_cit(tf);
 991         target_fabric_setup_tpg_nacl_auth_cit(tf);
 992         target_fabric_setup_tpg_nacl_param_cit(tf);
 993         target_fabric_setup_tpg_mappedlun_cit(tf);
 994
 995         return 0;
 996 }