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 void target_fabric_mappedlun_release(struct config_item *item)
 218 {
 219         struct se_lun_acl *lacl = container_of(to_config_group(item),
 220                                 struct se_lun_acl, se_lun_group);
 221         struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
 222
 223         core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
 224 }
 225
 226 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
 227         &target_fabric_mappedlun_write_protect.attr,
 228         NULL,
 229 };
 230
 231 static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
 232         .release                = target_fabric_mappedlun_release,
 233         .show_attribute         = target_fabric_mappedlun_attr_show,
 234         .store_attribute        = target_fabric_mappedlun_attr_store,
 235         .allow_link             = target_fabric_mappedlun_link,
 236         .drop_link              = target_fabric_mappedlun_unlink,
 237 };
 238
 239 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
 240                 target_fabric_mappedlun_attrs);
 241
 242 /* End of tfc_tpg_mappedlun_cit */
 243
 244 /* Start of tfc_tpg_nacl_attrib_cit */
 245
 246 CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
 247
 248 static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
 249         .show_attribute         = target_fabric_nacl_attrib_attr_show,
 250         .store_attribute        = target_fabric_nacl_attrib_attr_store,
 251 };
 252
 253 TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
 254
 255 /* End of tfc_tpg_nacl_attrib_cit */
 256
 257 /* Start of tfc_tpg_nacl_auth_cit */
 258
 259 CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
 260
 261 static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
 262         .show_attribute         = target_fabric_nacl_auth_attr_show,
 263         .store_attribute        = target_fabric_nacl_auth_attr_store,
 264 };
 265
 266 TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
 267
 268 /* End of tfc_tpg_nacl_auth_cit */
 269
 270 /* Start of tfc_tpg_nacl_param_cit */
 271
 272 CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
 273
 274 static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
 275         .show_attribute         = target_fabric_nacl_param_attr_show,
 276         .store_attribute        = target_fabric_nacl_param_attr_store,
 277 };
 278
 279 TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
 280
 281 /* End of tfc_tpg_nacl_param_cit */
 282
 283 /* Start of tfc_tpg_nacl_base_cit */
 284
 285 CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
 286
 287 static struct config_group *target_fabric_make_mappedlun(
 288         struct config_group *group,
 289         const char *name)
 290 {
 291         struct se_node_acl *se_nacl = container_of(group,
 292                         struct se_node_acl, acl_group);
 293         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 294         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 295         struct se_lun_acl *lacl;
 296         struct config_item *acl_ci;
 297         char *buf;
 298         unsigned long mapped_lun;
 299         int ret = 0;
 300
 301         acl_ci = &group->cg_item;
 302         if (!(acl_ci)) {
 303                 printk(KERN_ERR "Unable to locatel acl_ci\n");
 304                 return NULL;
 305         }
 306
 307         buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
 308         if (!(buf)) {
 309                 printk(KERN_ERR "Unable to allocate memory for name buf\n");
 310                 return ERR_PTR(-ENOMEM);
 311         }
 312         snprintf(buf, strlen(name) + 1, "%s", name);
 313         /*
 314          * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
 315          */
 316         if (strstr(buf, "lun_") != buf) {
 317                 printk(KERN_ERR "Unable to locate \"lun_\" from buf: %s"
 318                         " name: %s\n", buf, name);
 319                 ret = -EINVAL;
 320                 goto out;
 321         }
 322         /*
 323          * Determine the Mapped LUN value.  This is what the SCSI Initiator
 324          * Port will actually see.
 325          */
 326         if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
 327                 ret = -EINVAL;
 328                 goto out;
 329         }
 330
 331         lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
 332                         config_item_name(acl_ci), &ret);
 333         if (!(lacl))
 334                 goto out;
 335
 336         config_group_init_type_name(&lacl->se_lun_group, name,
 337                         &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
 338
 339         kfree(buf);
 340         return &lacl->se_lun_group;
 341 out:
 342         kfree(buf);
 343         return ERR_PTR(ret);
 344 }
 345
 346 static void target_fabric_drop_mappedlun(
 347         struct config_group *group,
 348         struct config_item *item)
 349 {
 350         config_item_put(item);
 351 }
 352
 353 static void target_fabric_nacl_base_release(struct config_item *item)
 354 {
 355         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 356                         struct se_node_acl, acl_group);
 357         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 358         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 359
 360         tf->tf_ops.fabric_drop_nodeacl(se_nacl);
 361 }
 362
 363 static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
 364         .release                = target_fabric_nacl_base_release,
 365         .show_attribute         = target_fabric_nacl_base_attr_show,
 366         .store_attribute        = target_fabric_nacl_base_attr_store,
 367 };
 368
 369 static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
 370         .make_group             = target_fabric_make_mappedlun,
 371         .drop_item              = target_fabric_drop_mappedlun,
 372 };
 373
 374 TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
 375                 &target_fabric_nacl_base_group_ops, NULL);
 376
 377 /* End of tfc_tpg_nacl_base_cit */
 378
 379 /* Start of tfc_tpg_nacl_cit */
 380
 381 static struct config_group *target_fabric_make_nodeacl(
 382         struct config_group *group,
 383         const char *name)
 384 {
 385         struct se_portal_group *se_tpg = container_of(group,
 386                         struct se_portal_group, tpg_acl_group);
 387         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 388         struct se_node_acl *se_nacl;
 389         struct config_group *nacl_cg;
 390
 391         if (!(tf->tf_ops.fabric_make_nodeacl)) {
 392                 printk(KERN_ERR "tf->tf_ops.fabric_make_nodeacl is NULL\n");
 393                 return ERR_PTR(-ENOSYS);
 394         }
 395
 396         se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
 397         if (IS_ERR(se_nacl))
 398                 return ERR_PTR(PTR_ERR(se_nacl));
 399
 400         nacl_cg = &se_nacl->acl_group;
 401         nacl_cg->default_groups = se_nacl->acl_default_groups;
 402         nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
 403         nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
 404         nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
 405         nacl_cg->default_groups[3] = NULL;
 406
 407         config_group_init_type_name(&se_nacl->acl_group, name,
 408                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
 409         config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
 410                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
 411         config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
 412                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
 413         config_group_init_type_name(&se_nacl->acl_param_group, "param",
 414                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
 415
 416         return &se_nacl->acl_group;
 417 }
 418
 419 static void target_fabric_drop_nodeacl(
 420         struct config_group *group,
 421         struct config_item *item)
 422 {
 423         struct se_node_acl *se_nacl = container_of(to_config_group(item),
 424                         struct se_node_acl, acl_group);
 425         struct config_item *df_item;
 426         struct config_group *nacl_cg;
 427         int i;
 428
 429         nacl_cg = &se_nacl->acl_group;
 430         for (i = 0; nacl_cg->default_groups[i]; i++) {
 431                 df_item = &nacl_cg->default_groups[i]->cg_item;
 432                 nacl_cg->default_groups[i] = NULL;
 433                 config_item_put(df_item);
 434         }
 435         /*
 436          * struct se_node_acl free is done in target_fabric_nacl_base_release()
 437          */
 438         config_item_put(item);
 439 }
 440
 441 static struct configfs_group_operations target_fabric_nacl_group_ops = {
 442         .make_group     = target_fabric_make_nodeacl,
 443         .drop_item      = target_fabric_drop_nodeacl,
 444 };
 445
 446 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
 447
 448 /* End of tfc_tpg_nacl_cit */
 449
 450 /* Start of tfc_tpg_np_base_cit */
 451
 452 CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
 453
 454 static void target_fabric_np_base_release(struct config_item *item)
 455 {
 456         struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
 457                                 struct se_tpg_np, tpg_np_group);
 458         struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
 459         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 460
 461         tf->tf_ops.fabric_drop_np(se_tpg_np);
 462 }
 463
 464 static struct configfs_item_operations target_fabric_np_base_item_ops = {
 465         .release                = target_fabric_np_base_release,
 466         .show_attribute         = target_fabric_np_base_attr_show,
 467         .store_attribute        = target_fabric_np_base_attr_store,
 468 };
 469
 470 TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
 471
 472 /* End of tfc_tpg_np_base_cit */
 473
 474 /* Start of tfc_tpg_np_cit */
 475
 476 static struct config_group *target_fabric_make_np(
 477         struct config_group *group,
 478         const char *name)
 479 {
 480         struct se_portal_group *se_tpg = container_of(group,
 481                                 struct se_portal_group, tpg_np_group);
 482         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 483         struct se_tpg_np *se_tpg_np;
 484
 485         if (!(tf->tf_ops.fabric_make_np)) {
 486                 printk(KERN_ERR "tf->tf_ops.fabric_make_np is NULL\n");
 487                 return ERR_PTR(-ENOSYS);
 488         }
 489
 490         se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
 491         if (!(se_tpg_np) || IS_ERR(se_tpg_np))
 492                 return ERR_PTR(-EINVAL);
 493
 494         se_tpg_np->tpg_np_parent = se_tpg;
 495         config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
 496                         &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
 497
 498         return &se_tpg_np->tpg_np_group;
 499 }
 500
 501 static void target_fabric_drop_np(
 502         struct config_group *group,
 503         struct config_item *item)
 504 {
 505         /*
 506          * struct se_tpg_np is released via target_fabric_np_base_release()
 507          */
 508         config_item_put(item);
 509 }
 510
 511 static struct configfs_group_operations target_fabric_np_group_ops = {
 512         .make_group     = &target_fabric_make_np,
 513         .drop_item      = &target_fabric_drop_np,
 514 };
 515
 516 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
 517
 518 /* End of tfc_tpg_np_cit */
 519
 520 /* Start of tfc_tpg_port_cit */
 521
 522 CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
 523 #define TCM_PORT_ATTR(_name, _mode)                                     \
 524 static struct target_fabric_port_attribute target_fabric_port_##_name = \
 525         __CONFIGFS_EATTR(_name, _mode,                                  \
 526         target_fabric_port_show_attr_##_name,                           \
 527         target_fabric_port_store_attr_##_name);
 528
 529 #define TCM_PORT_ATTOR_RO(_name)                                        \
 530         __CONFIGFS_EATTR_RO(_name,                                      \
 531         target_fabric_port_show_attr_##_name);
 532
 533 /*
 534  * alua_tg_pt_gp
 535  */
 536 static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
 537         struct se_lun *lun,
 538         char *page)
 539 {
 540         if (!(lun))
 541                 return -ENODEV;
 542
 543         if (!(lun->lun_sep))
 544                 return -ENODEV;
 545
 546         return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
 547 }
 548
 549 static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
 550         struct se_lun *lun,
 551         const char *page,
 552         size_t count)
 553 {
 554         if (!(lun))
 555                 return -ENODEV;
 556
 557         if (!(lun->lun_sep))
 558                 return -ENODEV;
 559
 560         return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
 561 }
 562
 563 TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
 564
 565 /*
 566  * alua_tg_pt_offline
 567  */
 568 static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
 569         struct se_lun *lun,
 570         char *page)
 571 {
 572         if (!(lun))
 573                 return -ENODEV;
 574
 575         if (!(lun->lun_sep))
 576                 return -ENODEV;
 577
 578         return core_alua_show_offline_bit(lun, page);
 579 }
 580
 581 static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
 582         struct se_lun *lun,
 583         const char *page,
 584         size_t count)
 585 {
 586         if (!(lun))
 587                 return -ENODEV;
 588
 589         if (!(lun->lun_sep))
 590                 return -ENODEV;
 591
 592         return core_alua_store_offline_bit(lun, page, count);
 593 }
 594
 595 TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
 596
 597 /*
 598  * alua_tg_pt_status
 599  */
 600 static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
 601         struct se_lun *lun,
 602         char *page)
 603 {
 604         if (!(lun))
 605                 return -ENODEV;
 606
 607         if (!(lun->lun_sep))
 608                 return -ENODEV;
 609
 610         return core_alua_show_secondary_status(lun, page);
 611 }
 612
 613 static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
 614         struct se_lun *lun,
 615         const char *page,
 616         size_t count)
 617 {
 618         if (!(lun))
 619                 return -ENODEV;
 620
 621         if (!(lun->lun_sep))
 622                 return -ENODEV;
 623
 624         return core_alua_store_secondary_status(lun, page, count);
 625 }
 626
 627 TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
 628
 629 /*
 630  * alua_tg_pt_write_md
 631  */
 632 static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
 633         struct se_lun *lun,
 634         char *page)
 635 {
 636         if (!(lun))
 637                 return -ENODEV;
 638
 639         if (!(lun->lun_sep))
 640                 return -ENODEV;
 641
 642         return core_alua_show_secondary_write_metadata(lun, page);
 643 }
 644
 645 static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
 646         struct se_lun *lun,
 647         const char *page,
 648         size_t count)
 649 {
 650         if (!(lun))
 651                 return -ENODEV;
 652
 653         if (!(lun->lun_sep))
 654                 return -ENODEV;
 655
 656         return core_alua_store_secondary_write_metadata(lun, page, count);
 657 }
 658
 659 TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
 660
 661
 662 static struct configfs_attribute *target_fabric_port_attrs[] = {
 663         &target_fabric_port_alua_tg_pt_gp.attr,
 664         &target_fabric_port_alua_tg_pt_offline.attr,
 665         &target_fabric_port_alua_tg_pt_status.attr,
 666         &target_fabric_port_alua_tg_pt_write_md.attr,
 667         NULL,
 668 };
 669
 670 CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
 671
 672 static int target_fabric_port_link(
 673         struct config_item *lun_ci,
 674         struct config_item *se_dev_ci)
 675 {
 676         struct config_item *tpg_ci;
 677         struct se_device *dev;
 678         struct se_lun *lun = container_of(to_config_group(lun_ci),
 679                                 struct se_lun, lun_group);
 680         struct se_lun *lun_p;
 681         struct se_portal_group *se_tpg;
 682         struct se_subsystem_dev *se_dev = container_of(
 683                                 to_config_group(se_dev_ci), struct se_subsystem_dev,
 684                                 se_dev_group);
 685         struct target_fabric_configfs *tf;
 686         int ret;
 687
 688         tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
 689         se_tpg = container_of(to_config_group(tpg_ci),
 690                                 struct se_portal_group, tpg_group);
 691         tf = se_tpg->se_tpg_wwn->wwn_tf;
 692
 693         if (lun->lun_se_dev !=  NULL) {
 694                 printk(KERN_ERR "Port Symlink already exists\n");
 695                 return -EEXIST;
 696         }
 697
 698         dev = se_dev->se_dev_ptr;
 699         if (!(dev)) {
 700                 printk(KERN_ERR "Unable to locate struct se_device pointer from"
 701                         " %s\n", config_item_name(se_dev_ci));
 702                 ret = -ENODEV;
 703                 goto out;
 704         }
 705
 706         lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
 707                                 lun->unpacked_lun);
 708         if ((IS_ERR(lun_p)) || !(lun_p)) {
 709                 printk(KERN_ERR "core_dev_add_lun() failed\n");
 710                 ret = -EINVAL;
 711                 goto out;
 712         }
 713
 714         if (tf->tf_ops.fabric_post_link) {
 715                 /*
 716                  * Call the optional fabric_post_link() to allow a
 717                  * fabric module to setup any additional state once
 718                  * core_dev_add_lun() has been called..
 719                  */
 720                 tf->tf_ops.fabric_post_link(se_tpg, lun);
 721         }
 722
 723         return 0;
 724 out:
 725         return ret;
 726 }
 727
 728 static int target_fabric_port_unlink(
 729         struct config_item *lun_ci,
 730         struct config_item *se_dev_ci)
 731 {
 732         struct se_lun *lun = container_of(to_config_group(lun_ci),
 733                                 struct se_lun, lun_group);
 734         struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
 735         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 736
 737         if (tf->tf_ops.fabric_pre_unlink) {
 738                 /*
 739                  * Call the optional fabric_pre_unlink() to allow a
 740                  * fabric module to release any additional stat before
 741                  * core_dev_del_lun() is called.
 742                 */
 743                 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
 744         }
 745
 746         core_dev_del_lun(se_tpg, lun->unpacked_lun);
 747         return 0;
 748 }
 749
 750 static struct configfs_item_operations target_fabric_port_item_ops = {
 751         .show_attribute         = target_fabric_port_attr_show,
 752         .store_attribute        = target_fabric_port_attr_store,
 753         .allow_link             = target_fabric_port_link,
 754         .drop_link              = target_fabric_port_unlink,
 755 };
 756
 757 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
 758
 759 /* End of tfc_tpg_port_cit */
 760
 761 /* Start of tfc_tpg_lun_cit */
 762
 763 static struct config_group *target_fabric_make_lun(
 764         struct config_group *group,
 765         const char *name)
 766 {
 767         struct se_lun *lun;
 768         struct se_portal_group *se_tpg = container_of(group,
 769                         struct se_portal_group, tpg_lun_group);
 770         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
 771         unsigned long unpacked_lun;
 772
 773         if (strstr(name, "lun_") != name) {
 774                 printk(KERN_ERR "Unable to locate \'_\" in"
 775                                 " \"lun_$LUN_NUMBER\"\n");
 776                 return ERR_PTR(-EINVAL);
 777         }
 778         if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
 779                 return ERR_PTR(-EINVAL);
 780
 781         lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
 782         if (!(lun))
 783                 return ERR_PTR(-EINVAL);
 784
 785         config_group_init_type_name(&lun->lun_group, name,
 786                         &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
 787
 788         return &lun->lun_group;
 789 }
 790
 791 static void target_fabric_drop_lun(
 792         struct config_group *group,
 793         struct config_item *item)
 794 {
 795         config_item_put(item);
 796 }
 797
 798 static struct configfs_group_operations target_fabric_lun_group_ops = {
 799         .make_group     = &target_fabric_make_lun,
 800         .drop_item      = &target_fabric_drop_lun,
 801 };
 802
 803 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
 804
 805 /* End of tfc_tpg_lun_cit */
 806
 807 /* Start of tfc_tpg_attrib_cit */
 808
 809 CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
 810
 811 static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
 812         .show_attribute         = target_fabric_tpg_attrib_attr_show,
 813         .store_attribute        = target_fabric_tpg_attrib_attr_store,
 814 };
 815
 816 TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
 817
 818 /* End of tfc_tpg_attrib_cit */
 819
 820 /* Start of tfc_tpg_param_cit */
 821
 822 CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
 823
 824 static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
 825         .show_attribute         = target_fabric_tpg_param_attr_show,
 826         .store_attribute        = target_fabric_tpg_param_attr_store,
 827 };
 828
 829 TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
 830
 831 /* End of tfc_tpg_param_cit */
 832
 833 /* Start of tfc_tpg_base_cit */
 834 /*
 835  * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
 836  */
 837 CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
 838
 839 static void target_fabric_tpg_release(struct config_item *item)
 840 {
 841         struct se_portal_group *se_tpg = container_of(to_config_group(item),
 842                         struct se_portal_group, tpg_group);
 843         struct se_wwn *wwn = se_tpg->se_tpg_wwn;
 844         struct target_fabric_configfs *tf = wwn->wwn_tf;
 845
 846         tf->tf_ops.fabric_drop_tpg(se_tpg);
 847 }
 848
 849 static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
 850         .release                = target_fabric_tpg_release,
 851         .show_attribute         = target_fabric_tpg_attr_show,
 852         .store_attribute        = target_fabric_tpg_attr_store,
 853 };
 854
 855 TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
 856
 857 /* End of tfc_tpg_base_cit */
 858
 859 /* Start of tfc_tpg_cit */
 860
 861 static struct config_group *target_fabric_make_tpg(
 862         struct config_group *group,
 863         const char *name)
 864 {
 865         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
 866         struct target_fabric_configfs *tf = wwn->wwn_tf;
 867         struct se_portal_group *se_tpg;
 868
 869         if (!(tf->tf_ops.fabric_make_tpg)) {
 870                 printk(KERN_ERR "tf->tf_ops.fabric_make_tpg is NULL\n");
 871                 return ERR_PTR(-ENOSYS);
 872         }
 873
 874         se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
 875         if (!(se_tpg) || IS_ERR(se_tpg))
 876                 return ERR_PTR(-EINVAL);
 877         /*
 878          * Setup default groups from pre-allocated se_tpg->tpg_default_groups
 879          */
 880         se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
 881         se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
 882         se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
 883         se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
 884         se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
 885         se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
 886         se_tpg->tpg_group.default_groups[5] = NULL;
 887
 888         config_group_init_type_name(&se_tpg->tpg_group, name,
 889                         &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
 890         config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
 891                         &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
 892         config_group_init_type_name(&se_tpg->tpg_np_group, "np",
 893                         &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
 894         config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
 895                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
 896         config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
 897                         &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
 898         config_group_init_type_name(&se_tpg->tpg_param_group, "param",
 899                         &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
 900
 901         return &se_tpg->tpg_group;
 902 }
 903
 904 static void target_fabric_drop_tpg(
 905         struct config_group *group,
 906         struct config_item *item)
 907 {
 908         struct se_portal_group *se_tpg = container_of(to_config_group(item),
 909                                 struct se_portal_group, tpg_group);
 910         struct config_group *tpg_cg = &se_tpg->tpg_group;
 911         struct config_item *df_item;
 912         int i;
 913         /*
 914          * Release default groups, but do not release tpg_cg->default_groups
 915          * memory as it is statically allocated at se_tpg->tpg_default_groups.
 916          */
 917         for (i = 0; tpg_cg->default_groups[i]; i++) {
 918                 df_item = &tpg_cg->default_groups[i]->cg_item;
 919                 tpg_cg->default_groups[i] = NULL;
 920                 config_item_put(df_item);
 921         }
 922
 923         config_item_put(item);
 924 }
 925
 926 static void target_fabric_release_wwn(struct config_item *item)
 927 {
 928         struct se_wwn *wwn = container_of(to_config_group(item),
 929                                 struct se_wwn, wwn_group);
 930         struct target_fabric_configfs *tf = wwn->wwn_tf;
 931
 932         tf->tf_ops.fabric_drop_wwn(wwn);
 933 }
 934
 935 static struct configfs_item_operations target_fabric_tpg_item_ops = {
 936         .release        = target_fabric_release_wwn,
 937 };
 938
 939 static struct configfs_group_operations target_fabric_tpg_group_ops = {
 940         .make_group     = target_fabric_make_tpg,
 941         .drop_item      = target_fabric_drop_tpg,
 942 };
 943
 944 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
 945                 NULL);
 946
 947 /* End of tfc_tpg_cit */
 948
 949 /* Start of tfc_wwn_cit */
 950
 951 static struct config_group *target_fabric_make_wwn(
 952         struct config_group *group,
 953         const char *name)
 954 {
 955         struct target_fabric_configfs *tf = container_of(group,
 956                                 struct target_fabric_configfs, tf_group);
 957         struct se_wwn *wwn;
 958
 959         if (!(tf->tf_ops.fabric_make_wwn)) {
 960                 printk(KERN_ERR "tf->tf_ops.fabric_make_wwn is NULL\n");
 961                 return ERR_PTR(-ENOSYS);
 962         }
 963
 964         wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
 965         if (!(wwn) || IS_ERR(wwn))
 966                 return ERR_PTR(-EINVAL);
 967
 968         wwn->wwn_tf = tf;
 969         config_group_init_type_name(&wwn->wwn_group, name,
 970                         &TF_CIT_TMPL(tf)->tfc_tpg_cit);
 971
 972         return &wwn->wwn_group;
 973 }
 974
 975 static void target_fabric_drop_wwn(
 976         struct config_group *group,
 977         struct config_item *item)
 978 {
 979         config_item_put(item);
 980 }
 981
 982 static struct configfs_group_operations target_fabric_wwn_group_ops = {
 983         .make_group     = target_fabric_make_wwn,
 984         .drop_item      = target_fabric_drop_wwn,
 985 };
 986 /*
 987  * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
 988  */
 989 CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
 990
 991 static struct configfs_item_operations target_fabric_wwn_item_ops = {
 992         .show_attribute         = target_fabric_wwn_attr_show,
 993         .store_attribute        = target_fabric_wwn_attr_store,
 994 };
 995
 996 TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
 997
 998 /* End of tfc_wwn_cit */
 999
1000 /* Start of tfc_discovery_cit */
1001
1002 CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
1003                 tf_disc_group);
1004
1005 static struct configfs_item_operations target_fabric_discovery_item_ops = {
1006         .show_attribute         = target_fabric_discovery_attr_show,
1007         .store_attribute        = target_fabric_discovery_attr_store,
1008 };
1009
1010 TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
1011
1012 /* End of tfc_discovery_cit */
1013
1014 int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1015 {
1016         target_fabric_setup_discovery_cit(tf);
1017         target_fabric_setup_wwn_cit(tf);
1018         target_fabric_setup_tpg_cit(tf);
1019         target_fabric_setup_tpg_base_cit(tf);
1020         target_fabric_setup_tpg_port_cit(tf);
1021         target_fabric_setup_tpg_lun_cit(tf);
1022         target_fabric_setup_tpg_np_cit(tf);
1023         target_fabric_setup_tpg_np_base_cit(tf);
1024         target_fabric_setup_tpg_attrib_cit(tf);
1025         target_fabric_setup_tpg_param_cit(tf);
1026         target_fabric_setup_tpg_nacl_cit(tf);
1027         target_fabric_setup_tpg_nacl_base_cit(tf);
1028         target_fabric_setup_tpg_nacl_attrib_cit(tf);
1029         target_fabric_setup_tpg_nacl_auth_cit(tf);
1030         target_fabric_setup_tpg_nacl_param_cit(tf);
1031         target_fabric_setup_tpg_mappedlun_cit(tf);
1032
1033         return 0;
1034 }