drivers/target/tcm_fc/tfc_conf.c

   1 /*******************************************************************************
   2  * Filename:  tcm_fc.c
   3  *
   4  * This file contains the configfs implementation for TCM_fc fabric node.
   5  * Based on tcm_loop_configfs.c
   6  *
   7  * Copyright (c) 2010 Cisco Systems, Inc.
   8  * Copyright (c) 2009,2010 Rising Tide, Inc.
   9  * Copyright (c) 2009,2010 Linux-iSCSI.org
  10  *
  11  * Copyright (c) 2009,2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  ****************************************************************************/
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <generated/utsrelease.h>
  27 #include <linux/utsname.h>
  28 #include <linux/init.h>
  29 #include <linux/slab.h>
  30 #include <linux/kthread.h>
  31 #include <linux/types.h>
  32 #include <linux/string.h>
  33 #include <linux/configfs.h>
  34 #include <linux/kernel.h>
  35 #include <linux/ctype.h>
  36 #include <asm/unaligned.h>
  37 #include <scsi/scsi.h>
  38 #include <scsi/scsi_host.h>
  39 #include <scsi/scsi_device.h>
  40 #include <scsi/scsi_cmnd.h>
  41 #include <scsi/libfc.h>
  42
  43 #include <target/target_core_base.h>
  44 #include <target/target_core_fabric.h>
  45 #include <target/target_core_fabric_configfs.h>
  46 #include <target/target_core_configfs.h>
  47 #include <target/configfs_macros.h>
  48
  49 #include "tcm_fc.h"
  50
  51 struct target_fabric_configfs *ft_configfs;
  52
  53 static LIST_HEAD(ft_wwn_list);
  54 DEFINE_MUTEX(ft_lport_lock);
  55
  56 unsigned int ft_debug_logging;
  57 module_param_named(debug_logging, ft_debug_logging, int, S_IRUGO|S_IWUSR);
  58 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
  59
  60 /*
  61  * Parse WWN.
  62  * If strict, we require lower-case hex and colon separators to be sure
  63  * the name is the same as what would be generated by ft_format_wwn()
  64  * so the name and wwn are mapped one-to-one.
  65  */
  66 static ssize_t ft_parse_wwn(const char *name, u64 *wwn, int strict)
  67 {
  68         const char *cp;
  69         char c;
  70         u32 byte = 0;
  71         u32 pos = 0;
  72         u32 err;
  73         int val;
  74
  75         *wwn = 0;
  76         for (cp = name; cp < &name[FT_NAMELEN - 1]; cp++) {
  77                 c = *cp;
  78                 if (c == '\n' && cp[1] == '\0')
  79                         continue;
  80                 if (strict && pos++ == 2 && byte++ < 7) {
  81                         pos = 0;
  82                         if (c == ':')
  83                                 continue;
  84                         err = 1;
  85                         goto fail;
  86                 }
  87                 if (c == '\0') {
  88                         err = 2;
  89                         if (strict && byte != 8)
  90                                 goto fail;
  91                         return cp - name;
  92                 }
  93                 err = 3;
  94                 val = hex_to_bin(c);
  95                 if (val < 0 || (strict && isupper(c)))
  96                         goto fail;
  97                 *wwn = (*wwn << 4) | val;
  98         }
  99         err = 4;
 100 fail:
 101         pr_debug("err %u len %zu pos %u byte %u\n",
 102                     err, cp - name, pos, byte);
 103         return -1;
 104 }
 105
 106 ssize_t ft_format_wwn(char *buf, size_t len, u64 wwn)
 107 {
 108         u8 b[8];
 109
 110         put_unaligned_be64(wwn, b);
 111         return snprintf(buf, len,
 112                  "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 113                  b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 114 }
 115
 116 static ssize_t ft_wwn_show(void *arg, char *buf)
 117 {
 118         u64 *wwn = arg;
 119         ssize_t len;
 120
 121         len = ft_format_wwn(buf, PAGE_SIZE - 2, *wwn);
 122         buf[len++] = '\n';
 123         return len;
 124 }
 125
 126 static ssize_t ft_wwn_store(void *arg, const char *buf, size_t len)
 127 {
 128         ssize_t ret;
 129         u64 wwn;
 130
 131         ret = ft_parse_wwn(buf, &wwn, 0);
 132         if (ret > 0)
 133                 *(u64 *)arg = wwn;
 134         return ret;
 135 }
 136
 137 /*
 138  * ACL auth ops.
 139  */
 140
 141 static ssize_t ft_nacl_show_port_name(
 142         struct se_node_acl *se_nacl,
 143         char *page)
 144 {
 145         struct ft_node_acl *acl = container_of(se_nacl,
 146                         struct ft_node_acl, se_node_acl);
 147
 148         return ft_wwn_show(&acl->node_auth.port_name, page);
 149 }
 150
 151 static ssize_t ft_nacl_store_port_name(
 152         struct se_node_acl *se_nacl,
 153         const char *page,
 154         size_t count)
 155 {
 156         struct ft_node_acl *acl = container_of(se_nacl,
 157                         struct ft_node_acl, se_node_acl);
 158
 159         return ft_wwn_store(&acl->node_auth.port_name, page, count);
 160 }
 161
 162 TF_NACL_BASE_ATTR(ft, port_name, S_IRUGO | S_IWUSR);
 163
 164 static ssize_t ft_nacl_show_node_name(
 165         struct se_node_acl *se_nacl,
 166         char *page)
 167 {
 168         struct ft_node_acl *acl = container_of(se_nacl,
 169                         struct ft_node_acl, se_node_acl);
 170
 171         return ft_wwn_show(&acl->node_auth.node_name, page);
 172 }
 173
 174 static ssize_t ft_nacl_store_node_name(
 175         struct se_node_acl *se_nacl,
 176         const char *page,
 177         size_t count)
 178 {
 179         struct ft_node_acl *acl = container_of(se_nacl,
 180                         struct ft_node_acl, se_node_acl);
 181
 182         return ft_wwn_store(&acl->node_auth.node_name, page, count);
 183 }
 184
 185 TF_NACL_BASE_ATTR(ft, node_name, S_IRUGO | S_IWUSR);
 186
 187 static struct configfs_attribute *ft_nacl_base_attrs[] = {
 188         &ft_nacl_port_name.attr,
 189         &ft_nacl_node_name.attr,
 190         NULL,
 191 };
 192
 193 /*
 194  * ACL ops.
 195  */
 196
 197 /*
 198  * Add ACL for an initiator.  The ACL is named arbitrarily.
 199  * The port_name and/or node_name are attributes.
 200  */
 201 static struct se_node_acl *ft_add_acl(
 202         struct se_portal_group *se_tpg,
 203         struct config_group *group,
 204         const char *name)
 205 {
 206         struct ft_node_acl *acl;
 207         struct ft_tpg *tpg;
 208         u64 wwpn;
 209         u32 q_depth;
 210
 211         pr_debug("add acl %s\n", name);
 212         tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
 213
 214         if (ft_parse_wwn(name, &wwpn, 1) < 0)
 215                 return ERR_PTR(-EINVAL);
 216
 217         acl = kzalloc(sizeof(struct ft_node_acl), GFP_KERNEL);
 218         if (!acl)
 219                 return ERR_PTR(-ENOMEM);
 220         acl->node_auth.port_name = wwpn;
 221
 222         q_depth = 32;           /* XXX bogus default - get from tpg? */
 223         return core_tpg_add_initiator_node_acl(&tpg->se_tpg,
 224                                 &acl->se_node_acl, name, q_depth);
 225 }
 226
 227 static void ft_del_acl(struct se_node_acl *se_acl)
 228 {
 229         struct se_portal_group *se_tpg = se_acl->se_tpg;
 230         struct ft_tpg *tpg;
 231         struct ft_node_acl *acl = container_of(se_acl,
 232                                 struct ft_node_acl, se_node_acl);
 233
 234         pr_debug("del acl %s\n",
 235                 config_item_name(&se_acl->acl_group.cg_item));
 236
 237         tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
 238         pr_debug("del acl %p se_acl %p tpg %p se_tpg %p\n",
 239                     acl, se_acl, tpg, &tpg->se_tpg);
 240
 241         core_tpg_del_initiator_node_acl(&tpg->se_tpg, se_acl, 1);
 242         kfree(acl);
 243 }
 244
 245 struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata)
 246 {
 247         struct ft_node_acl *found = NULL;
 248         struct ft_node_acl *acl;
 249         struct se_portal_group *se_tpg = &tpg->se_tpg;
 250         struct se_node_acl *se_acl;
 251
 252         spin_lock_irq(&se_tpg->acl_node_lock);
 253         list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) {
 254                 acl = container_of(se_acl, struct ft_node_acl, se_node_acl);
 255                 pr_debug("acl %p port_name %llx\n",
 256                         acl, (unsigned long long)acl->node_auth.port_name);
 257                 if (acl->node_auth.port_name == rdata->ids.port_name ||
 258                     acl->node_auth.node_name == rdata->ids.node_name) {
 259                         pr_debug("acl %p port_name %llx matched\n", acl,
 260                                     (unsigned long long)rdata->ids.port_name);
 261                         found = acl;
 262                         /* XXX need to hold onto ACL */
 263                         break;
 264                 }
 265         }
 266         spin_unlock_irq(&se_tpg->acl_node_lock);
 267         return found;
 268 }
 269
 270 static struct se_node_acl *ft_tpg_alloc_fabric_acl(struct se_portal_group *se_tpg)
 271 {
 272         struct ft_node_acl *acl;
 273
 274         acl = kzalloc(sizeof(*acl), GFP_KERNEL);
 275         if (!acl) {
 276                 pr_err("Unable to allocate struct ft_node_acl\n");
 277                 return NULL;
 278         }
 279         pr_debug("acl %p\n", acl);
 280         return &acl->se_node_acl;
 281 }
 282
 283 static void ft_tpg_release_fabric_acl(struct se_portal_group *se_tpg,
 284                                       struct se_node_acl *se_acl)
 285 {
 286         struct ft_node_acl *acl = container_of(se_acl,
 287                                 struct ft_node_acl, se_node_acl);
 288
 289         pr_debug("acl %p\n", acl);
 290         kfree(acl);
 291 }
 292
 293 /*
 294  * local_port port_group (tpg) ops.
 295  */
 296 static struct se_portal_group *ft_add_tpg(
 297         struct se_wwn *wwn,
 298         struct config_group *group,
 299         const char *name)
 300 {
 301         struct ft_lport_wwn *ft_wwn;
 302         struct ft_tpg *tpg;
 303         struct workqueue_struct *wq;
 304         unsigned long index;
 305         int ret;
 306
 307         pr_debug("tcm_fc: add tpg %s\n", name);
 308
 309         /*
 310          * Name must be "tpgt_" followed by the index.
 311          */
 312         if (strstr(name, "tpgt_") != name)
 313                 return NULL;
 314
 315         ret = kstrtoul(name + 5, 10, &index);
 316         if (ret)
 317                 return NULL;
 318         if (index > UINT_MAX)
 319                 return NULL;
 320
 321         if ((index != 1)) {
 322                 pr_err("Error, a single TPG=1 is used for HW port mappings\n");
 323                 return ERR_PTR(-ENOSYS);
 324         }
 325
 326         ft_wwn = container_of(wwn, struct ft_lport_wwn, se_wwn);
 327         tpg = kzalloc(sizeof(*tpg), GFP_KERNEL);
 328         if (!tpg)
 329                 return NULL;
 330         tpg->index = index;
 331         tpg->lport_wwn = ft_wwn;
 332         INIT_LIST_HEAD(&tpg->lun_list);
 333
 334         wq = alloc_workqueue("tcm_fc", 0, 1);
 335         if (!wq) {
 336                 kfree(tpg);
 337                 return NULL;
 338         }
 339
 340         ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg,
 341                                 tpg, TRANSPORT_TPG_TYPE_NORMAL);
 342         if (ret < 0) {
 343                 destroy_workqueue(wq);
 344                 kfree(tpg);
 345                 return NULL;
 346         }
 347         tpg->workqueue = wq;
 348
 349         mutex_lock(&ft_lport_lock);
 350         ft_wwn->tpg = tpg;
 351         mutex_unlock(&ft_lport_lock);
 352
 353         return &tpg->se_tpg;
 354 }
 355
 356 static void ft_del_tpg(struct se_portal_group *se_tpg)
 357 {
 358         struct ft_tpg *tpg = container_of(se_tpg, struct ft_tpg, se_tpg);
 359         struct ft_lport_wwn *ft_wwn = tpg->lport_wwn;
 360
 361         pr_debug("del tpg %s\n",
 362                     config_item_name(&tpg->se_tpg.tpg_group.cg_item));
 363
 364         destroy_workqueue(tpg->workqueue);
 365
 366         /* Wait for sessions to be freed thru RCU, for BUG_ON below */
 367         synchronize_rcu();
 368
 369         mutex_lock(&ft_lport_lock);
 370         ft_wwn->tpg = NULL;
 371         if (tpg->tport) {
 372                 tpg->tport->tpg = NULL;
 373                 tpg->tport = NULL;
 374         }
 375         mutex_unlock(&ft_lport_lock);
 376
 377         core_tpg_deregister(se_tpg);
 378         kfree(tpg);
 379 }
 380
 381 /*
 382  * Verify that an lport is configured to use the tcm_fc module, and return
 383  * the target port group that should be used.
 384  *
 385  * The caller holds ft_lport_lock.
 386  */
 387 struct ft_tpg *ft_lport_find_tpg(struct fc_lport *lport)
 388 {
 389         struct ft_lport_wwn *ft_wwn;
 390
 391         list_for_each_entry(ft_wwn, &ft_wwn_list, ft_wwn_node) {
 392                 if (ft_wwn->wwpn == lport->wwpn)
 393                         return ft_wwn->tpg;
 394         }
 395         return NULL;
 396 }
 397
 398 /*
 399  * target config instance ops.
 400  */
 401
 402 /*
 403  * Add lport to allowed config.
 404  * The name is the WWPN in lower-case ASCII, colon-separated bytes.
 405  */
 406 static struct se_wwn *ft_add_wwn(
 407         struct target_fabric_configfs *tf,
 408         struct config_group *group,
 409         const char *name)
 410 {
 411         struct ft_lport_wwn *ft_wwn;
 412         struct ft_lport_wwn *old_ft_wwn;
 413         u64 wwpn;
 414
 415         pr_debug("add wwn %s\n", name);
 416         if (ft_parse_wwn(name, &wwpn, 1) < 0)
 417                 return NULL;
 418         ft_wwn = kzalloc(sizeof(*ft_wwn), GFP_KERNEL);
 419         if (!ft_wwn)
 420                 return NULL;
 421         ft_wwn->wwpn = wwpn;
 422
 423         mutex_lock(&ft_lport_lock);
 424         list_for_each_entry(old_ft_wwn, &ft_wwn_list, ft_wwn_node) {
 425                 if (old_ft_wwn->wwpn == wwpn) {
 426                         mutex_unlock(&ft_lport_lock);
 427                         kfree(ft_wwn);
 428                         return NULL;
 429                 }
 430         }
 431         list_add_tail(&ft_wwn->ft_wwn_node, &ft_wwn_list);
 432         ft_format_wwn(ft_wwn->name, sizeof(ft_wwn->name), wwpn);
 433         mutex_unlock(&ft_lport_lock);
 434
 435         return &ft_wwn->se_wwn;
 436 }
 437
 438 static void ft_del_wwn(struct se_wwn *wwn)
 439 {
 440         struct ft_lport_wwn *ft_wwn = container_of(wwn,
 441                                 struct ft_lport_wwn, se_wwn);
 442
 443         pr_debug("del wwn %s\n", ft_wwn->name);
 444         mutex_lock(&ft_lport_lock);
 445         list_del(&ft_wwn->ft_wwn_node);
 446         mutex_unlock(&ft_lport_lock);
 447
 448         kfree(ft_wwn);
 449 }
 450
 451 static ssize_t ft_wwn_show_attr_version(
 452         struct target_fabric_configfs *tf,
 453         char *page)
 454 {
 455         return sprintf(page, "TCM FC " FT_VERSION " on %s/%s on "
 456                 ""UTS_RELEASE"\n",  utsname()->sysname, utsname()->machine);
 457 }
 458
 459 TF_WWN_ATTR_RO(ft, version);
 460
 461 static struct configfs_attribute *ft_wwn_attrs[] = {
 462         &ft_wwn_version.attr,
 463         NULL,
 464 };
 465
 466 static char *ft_get_fabric_name(void)
 467 {
 468         return "fc";
 469 }
 470
 471 static char *ft_get_fabric_wwn(struct se_portal_group *se_tpg)
 472 {
 473         struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
 474
 475         return tpg->lport_wwn->name;
 476 }
 477
 478 static u16 ft_get_tag(struct se_portal_group *se_tpg)
 479 {
 480         struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
 481
 482         /*
 483          * This tag is used when forming SCSI Name identifier in EVPD=1 0x83
 484          * to represent the SCSI Target Port.
 485          */
 486         return tpg->index;
 487 }
 488
 489 static u32 ft_get_default_depth(struct se_portal_group *se_tpg)
 490 {
 491         return 1;
 492 }
 493
 494 static int ft_check_false(struct se_portal_group *se_tpg)
 495 {
 496         return 0;
 497 }
 498
 499 static void ft_set_default_node_attr(struct se_node_acl *se_nacl)
 500 {
 501 }
 502
 503 static u32 ft_tpg_get_inst_index(struct se_portal_group *se_tpg)
 504 {
 505         struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr;
 506
 507         return tpg->index;
 508 }
 509
 510 static struct target_core_fabric_ops ft_fabric_ops = {
 511         .get_fabric_name =              ft_get_fabric_name,
 512         .get_fabric_proto_ident =       fc_get_fabric_proto_ident,
 513         .tpg_get_wwn =                  ft_get_fabric_wwn,
 514         .tpg_get_tag =                  ft_get_tag,
 515         .tpg_get_default_depth =        ft_get_default_depth,
 516         .tpg_get_pr_transport_id =      fc_get_pr_transport_id,
 517         .tpg_get_pr_transport_id_len =  fc_get_pr_transport_id_len,
 518         .tpg_parse_pr_out_transport_id = fc_parse_pr_out_transport_id,
 519         .tpg_check_demo_mode =          ft_check_false,
 520         .tpg_check_demo_mode_cache =    ft_check_false,
 521         .tpg_check_demo_mode_write_protect = ft_check_false,
 522         .tpg_check_prod_mode_write_protect = ft_check_false,
 523         .tpg_alloc_fabric_acl =         ft_tpg_alloc_fabric_acl,
 524         .tpg_release_fabric_acl =       ft_tpg_release_fabric_acl,
 525         .tpg_get_inst_index =           ft_tpg_get_inst_index,
 526         .check_stop_free =              ft_check_stop_free,
 527         .release_cmd =                  ft_release_cmd,
 528         .shutdown_session =             ft_sess_shutdown,
 529         .close_session =                ft_sess_close,
 530         .sess_get_index =               ft_sess_get_index,
 531         .sess_get_initiator_sid =       NULL,
 532         .write_pending =                ft_write_pending,
 533         .write_pending_status =         ft_write_pending_status,
 534         .set_default_node_attributes =  ft_set_default_node_attr,
 535         .get_task_tag =                 ft_get_task_tag,
 536         .get_cmd_state =                ft_get_cmd_state,
 537         .queue_data_in =                ft_queue_data_in,
 538         .queue_status =                 ft_queue_status,
 539         .queue_tm_rsp =                 ft_queue_tm_resp,
 540         .aborted_task =                 ft_aborted_task,
 541         /*
 542          * Setup function pointers for generic logic in
 543          * target_core_fabric_configfs.c
 544          */
 545         .fabric_make_wwn =              &ft_add_wwn,
 546         .fabric_drop_wwn =              &ft_del_wwn,
 547         .fabric_make_tpg =              &ft_add_tpg,
 548         .fabric_drop_tpg =              &ft_del_tpg,
 549         .fabric_post_link =             NULL,
 550         .fabric_pre_unlink =            NULL,
 551         .fabric_make_np =               NULL,
 552         .fabric_drop_np =               NULL,
 553         .fabric_make_nodeacl =          &ft_add_acl,
 554         .fabric_drop_nodeacl =          &ft_del_acl,
 555 };
 556
 557 static int ft_register_configfs(void)
 558 {
 559         struct target_fabric_configfs *fabric;
 560         int ret;
 561
 562         /*
 563          * Register the top level struct config_item_type with TCM core
 564          */
 565         fabric = target_fabric_configfs_init(THIS_MODULE, "fc");
 566         if (IS_ERR(fabric)) {
 567                 pr_err("%s: target_fabric_configfs_init() failed!\n",
 568                        __func__);
 569                 return PTR_ERR(fabric);
 570         }
 571         fabric->tf_ops = ft_fabric_ops;
 572
 573         /*
 574          * Setup default attribute lists for various fabric->tf_cit_tmpl
 575          */
 576         fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = ft_wwn_attrs;
 577         fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = NULL;
 578         fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;
 579         fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
 580         fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
 581         fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs =
 582                                                     ft_nacl_base_attrs;
 583         fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
 584         fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
 585         fabric->tf_cit_tmpl.tfc_tpg_nacl_param_cit.ct_attrs = NULL;
 586         /*
 587          * register the fabric for use within TCM
 588          */
 589         ret = target_fabric_configfs_register(fabric);
 590         if (ret < 0) {
 591                 pr_debug("target_fabric_configfs_register() for"
 592                             " FC Target failed!\n");
 593                 target_fabric_configfs_free(fabric);
 594                 return -1;
 595         }
 596
 597         /*
 598          * Setup our local pointer to *fabric.
 599          */
 600         ft_configfs = fabric;
 601         return 0;
 602 }
 603
 604 static void ft_deregister_configfs(void)
 605 {
 606         if (!ft_configfs)
 607                 return;
 608         target_fabric_configfs_deregister(ft_configfs);
 609         ft_configfs = NULL;
 610 }
 611
 612 static struct notifier_block ft_notifier = {
 613         .notifier_call = ft_lport_notify
 614 };
 615
 616 static int __init ft_init(void)
 617 {
 618         if (ft_register_configfs())
 619                 return -1;
 620         if (fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov)) {
 621                 ft_deregister_configfs();
 622                 return -1;
 623         }
 624         blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier);
 625         fc_lport_iterate(ft_lport_add, NULL);
 626         return 0;
 627 }
 628
 629 static void __exit ft_exit(void)
 630 {
 631         blocking_notifier_chain_unregister(&fc_lport_notifier_head,
 632                                            &ft_notifier);
 633         fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov);
 634         fc_lport_iterate(ft_lport_del, NULL);
 635         ft_deregister_configfs();
 636         synchronize_rcu();
 637 }
 638
 639 MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION);
 640 MODULE_LICENSE("GPL");
 641 module_init(ft_init);
 642 module_exit(ft_exit);