1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2013 Datera, Inc. 7 * 8 * Nicholas A. Bellinger <nab@kernel.org> 9 * 10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 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 <generated/utsrelease.h> 26 #include <linux/utsname.h> 27 #include <linux/init.h> 28 #include <linux/fs.h> 29 #include <linux/namei.h> 30 #include <linux/slab.h> 31 #include <linux/types.h> 32 #include <linux/delay.h> 33 #include <linux/unistd.h> 34 #include <linux/string.h> 35 #include <linux/parser.h> 36 #include <linux/syscalls.h> 37 #include <linux/configfs.h> 38 #include <linux/spinlock.h> 39 40 #include <target/target_core_base.h> 41 #include <target/target_core_backend.h> 42 #include <target/target_core_fabric.h> 43 #include <target/target_core_fabric_configfs.h> 44 #include <target/target_core_configfs.h> 45 #include <target/configfs_macros.h> 46 47 #include "target_core_internal.h" 48 #include "target_core_alua.h" 49 #include "target_core_pr.h" 50 #include "target_core_rd.h" 51 #include "target_core_xcopy.h" 52 53 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 54 static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \ 55 { \ 56 struct target_backend_cits *tbc = &sa->tb_cits; \ 57 struct config_item_type *cit = &tbc->tb_##_name##_cit; \ 58 \ 59 cit->ct_item_ops = _item_ops; \ 60 cit->ct_group_ops = _group_ops; \ 61 cit->ct_attrs = _attrs; \ 62 cit->ct_owner = sa->owner; \ 63 pr_debug("Setup generic %s\n", __stringify(_name)); \ 64 } 65 66 extern struct t10_alua_lu_gp *default_lu_gp; 67 68 static LIST_HEAD(g_tf_list); 69 static DEFINE_MUTEX(g_tf_lock); 70 71 struct target_core_configfs_attribute { 72 struct configfs_attribute attr; 73 ssize_t (*show)(void *, char *); 74 ssize_t (*store)(void *, const char *, size_t); 75 }; 76 77 static struct config_group target_core_hbagroup; 78 static struct config_group alua_group; 79 static struct config_group alua_lu_gps_group; 80 81 static inline struct se_hba * 82 item_to_hba(struct config_item *item) 83 { 84 return container_of(to_config_group(item), struct se_hba, hba_group); 85 } 86 87 /* 88 * Attributes for /sys/kernel/config/target/ 89 */ 90 static ssize_t target_core_attr_show(struct config_item *item, 91 struct configfs_attribute *attr, 92 char *page) 93 { 94 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 95 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 96 utsname()->sysname, utsname()->machine); 97 } 98 99 static struct configfs_item_operations target_core_fabric_item_ops = { 100 .show_attribute = target_core_attr_show, 101 }; 102 103 static struct configfs_attribute target_core_item_attr_version = { 104 .ca_owner = THIS_MODULE, 105 .ca_name = "version", 106 .ca_mode = S_IRUGO, 107 }; 108 109 static struct target_fabric_configfs *target_core_get_fabric( 110 const char *name) 111 { 112 struct target_fabric_configfs *tf; 113 114 if (!name) 115 return NULL; 116 117 mutex_lock(&g_tf_lock); 118 list_for_each_entry(tf, &g_tf_list, tf_list) { 119 if (!strcmp(tf->tf_name, name)) { 120 atomic_inc(&tf->tf_access_cnt); 121 mutex_unlock(&g_tf_lock); 122 return tf; 123 } 124 } 125 mutex_unlock(&g_tf_lock); 126 127 return NULL; 128 } 129 130 /* 131 * Called from struct target_core_group_ops->make_group() 132 */ 133 static struct config_group *target_core_register_fabric( 134 struct config_group *group, 135 const char *name) 136 { 137 struct target_fabric_configfs *tf; 138 int ret; 139 140 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 141 " %s\n", group, name); 142 143 tf = target_core_get_fabric(name); 144 if (!tf) { 145 pr_debug("target_core_register_fabric() trying autoload for %s\n", 146 name); 147 148 /* 149 * Below are some hardcoded request_module() calls to automatically 150 * local fabric modules when the following is called: 151 * 152 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 153 * 154 * Note that this does not limit which TCM fabric module can be 155 * registered, but simply provids auto loading logic for modules with 156 * mkdir(2) system calls with known TCM fabric modules. 157 */ 158 159 if (!strncmp(name, "iscsi", 5)) { 160 /* 161 * Automatically load the LIO Target fabric module when the 162 * following is called: 163 * 164 * mkdir -p $CONFIGFS/target/iscsi 165 */ 166 ret = request_module("iscsi_target_mod"); 167 if (ret < 0) { 168 pr_debug("request_module() failed for" 169 " iscsi_target_mod.ko: %d\n", ret); 170 return ERR_PTR(-EINVAL); 171 } 172 } else if (!strncmp(name, "loopback", 8)) { 173 /* 174 * Automatically load the tcm_loop fabric module when the 175 * following is called: 176 * 177 * mkdir -p $CONFIGFS/target/loopback 178 */ 179 ret = request_module("tcm_loop"); 180 if (ret < 0) { 181 pr_debug("request_module() failed for" 182 " tcm_loop.ko: %d\n", ret); 183 return ERR_PTR(-EINVAL); 184 } 185 } 186 187 tf = target_core_get_fabric(name); 188 } 189 190 if (!tf) { 191 pr_debug("target_core_get_fabric() failed for %s\n", 192 name); 193 return ERR_PTR(-EINVAL); 194 } 195 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 196 " %s\n", tf->tf_name); 197 /* 198 * On a successful target_core_get_fabric() look, the returned 199 * struct target_fabric_configfs *tf will contain a usage reference. 200 */ 201 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 202 &tf->tf_cit_tmpl.tfc_wwn_cit); 203 204 tf->tf_group.default_groups = tf->tf_default_groups; 205 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 206 tf->tf_group.default_groups[1] = NULL; 207 208 config_group_init_type_name(&tf->tf_group, name, 209 &tf->tf_cit_tmpl.tfc_wwn_cit); 210 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 211 &tf->tf_cit_tmpl.tfc_discovery_cit); 212 213 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 214 " %s\n", tf->tf_group.cg_item.ci_name); 215 tf->tf_fabric = &tf->tf_group.cg_item; 216 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 217 " for %s\n", name); 218 219 return &tf->tf_group; 220 } 221 222 /* 223 * Called from struct target_core_group_ops->drop_item() 224 */ 225 static void target_core_deregister_fabric( 226 struct config_group *group, 227 struct config_item *item) 228 { 229 struct target_fabric_configfs *tf = container_of( 230 to_config_group(item), struct target_fabric_configfs, tf_group); 231 struct config_group *tf_group; 232 struct config_item *df_item; 233 int i; 234 235 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 236 " tf list\n", config_item_name(item)); 237 238 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 239 " %s\n", tf->tf_name); 240 atomic_dec(&tf->tf_access_cnt); 241 242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 243 " tf->tf_fabric for %s\n", tf->tf_name); 244 tf->tf_fabric = NULL; 245 246 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 247 " %s\n", config_item_name(item)); 248 249 tf_group = &tf->tf_group; 250 for (i = 0; tf_group->default_groups[i]; i++) { 251 df_item = &tf_group->default_groups[i]->cg_item; 252 tf_group->default_groups[i] = NULL; 253 config_item_put(df_item); 254 } 255 config_item_put(item); 256 } 257 258 static struct configfs_group_operations target_core_fabric_group_ops = { 259 .make_group = &target_core_register_fabric, 260 .drop_item = &target_core_deregister_fabric, 261 }; 262 263 /* 264 * All item attributes appearing in /sys/kernel/target/ appear here. 265 */ 266 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 267 &target_core_item_attr_version, 268 NULL, 269 }; 270 271 /* 272 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 273 */ 274 static struct config_item_type target_core_fabrics_item = { 275 .ct_item_ops = &target_core_fabric_item_ops, 276 .ct_group_ops = &target_core_fabric_group_ops, 277 .ct_attrs = target_core_fabric_item_attrs, 278 .ct_owner = THIS_MODULE, 279 }; 280 281 static struct configfs_subsystem target_core_fabrics = { 282 .su_group = { 283 .cg_item = { 284 .ci_namebuf = "target", 285 .ci_type = &target_core_fabrics_item, 286 }, 287 }, 288 }; 289 290 int target_depend_item(struct config_item *item) 291 { 292 return configfs_depend_item(&target_core_fabrics, item); 293 } 294 EXPORT_SYMBOL(target_depend_item); 295 296 void target_undepend_item(struct config_item *item) 297 { 298 return configfs_undepend_item(&target_core_fabrics, item); 299 } 300 EXPORT_SYMBOL(target_undepend_item); 301 302 /*############################################################################## 303 // Start functions called by external Target Fabrics Modules 304 //############################################################################*/ 305 306 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 307 { 308 if (!tfo->name) { 309 pr_err("Missing tfo->name\n"); 310 return -EINVAL; 311 } 312 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) { 313 pr_err("Passed name: %s exceeds TARGET_FABRIC" 314 "_NAME_SIZE\n", tfo->name); 315 return -EINVAL; 316 } 317 if (!tfo->get_fabric_name) { 318 pr_err("Missing tfo->get_fabric_name()\n"); 319 return -EINVAL; 320 } 321 if (!tfo->tpg_get_wwn) { 322 pr_err("Missing tfo->tpg_get_wwn()\n"); 323 return -EINVAL; 324 } 325 if (!tfo->tpg_get_tag) { 326 pr_err("Missing tfo->tpg_get_tag()\n"); 327 return -EINVAL; 328 } 329 if (!tfo->tpg_check_demo_mode) { 330 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 331 return -EINVAL; 332 } 333 if (!tfo->tpg_check_demo_mode_cache) { 334 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 335 return -EINVAL; 336 } 337 if (!tfo->tpg_check_demo_mode_write_protect) { 338 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 339 return -EINVAL; 340 } 341 if (!tfo->tpg_check_prod_mode_write_protect) { 342 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 343 return -EINVAL; 344 } 345 if (!tfo->tpg_get_inst_index) { 346 pr_err("Missing tfo->tpg_get_inst_index()\n"); 347 return -EINVAL; 348 } 349 if (!tfo->release_cmd) { 350 pr_err("Missing tfo->release_cmd()\n"); 351 return -EINVAL; 352 } 353 if (!tfo->shutdown_session) { 354 pr_err("Missing tfo->shutdown_session()\n"); 355 return -EINVAL; 356 } 357 if (!tfo->close_session) { 358 pr_err("Missing tfo->close_session()\n"); 359 return -EINVAL; 360 } 361 if (!tfo->sess_get_index) { 362 pr_err("Missing tfo->sess_get_index()\n"); 363 return -EINVAL; 364 } 365 if (!tfo->write_pending) { 366 pr_err("Missing tfo->write_pending()\n"); 367 return -EINVAL; 368 } 369 if (!tfo->write_pending_status) { 370 pr_err("Missing tfo->write_pending_status()\n"); 371 return -EINVAL; 372 } 373 if (!tfo->set_default_node_attributes) { 374 pr_err("Missing tfo->set_default_node_attributes()\n"); 375 return -EINVAL; 376 } 377 if (!tfo->get_cmd_state) { 378 pr_err("Missing tfo->get_cmd_state()\n"); 379 return -EINVAL; 380 } 381 if (!tfo->queue_data_in) { 382 pr_err("Missing tfo->queue_data_in()\n"); 383 return -EINVAL; 384 } 385 if (!tfo->queue_status) { 386 pr_err("Missing tfo->queue_status()\n"); 387 return -EINVAL; 388 } 389 if (!tfo->queue_tm_rsp) { 390 pr_err("Missing tfo->queue_tm_rsp()\n"); 391 return -EINVAL; 392 } 393 if (!tfo->aborted_task) { 394 pr_err("Missing tfo->aborted_task()\n"); 395 return -EINVAL; 396 } 397 /* 398 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 399 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 400 * target_core_fabric_configfs.c WWN+TPG group context code. 401 */ 402 if (!tfo->fabric_make_wwn) { 403 pr_err("Missing tfo->fabric_make_wwn()\n"); 404 return -EINVAL; 405 } 406 if (!tfo->fabric_drop_wwn) { 407 pr_err("Missing tfo->fabric_drop_wwn()\n"); 408 return -EINVAL; 409 } 410 if (!tfo->fabric_make_tpg) { 411 pr_err("Missing tfo->fabric_make_tpg()\n"); 412 return -EINVAL; 413 } 414 if (!tfo->fabric_drop_tpg) { 415 pr_err("Missing tfo->fabric_drop_tpg()\n"); 416 return -EINVAL; 417 } 418 419 return 0; 420 } 421 422 int target_register_template(const struct target_core_fabric_ops *fo) 423 { 424 struct target_fabric_configfs *tf; 425 int ret; 426 427 ret = target_fabric_tf_ops_check(fo); 428 if (ret) 429 return ret; 430 431 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 432 if (!tf) { 433 pr_err("%s: could not allocate memory!\n", __func__); 434 return -ENOMEM; 435 } 436 437 INIT_LIST_HEAD(&tf->tf_list); 438 atomic_set(&tf->tf_access_cnt, 0); 439 440 /* 441 * Setup the default generic struct config_item_type's (cits) in 442 * struct target_fabric_configfs->tf_cit_tmpl 443 */ 444 tf->tf_module = fo->module; 445 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", fo->name); 446 447 tf->tf_ops = fo; 448 target_fabric_setup_cits(tf); 449 450 mutex_lock(&g_tf_lock); 451 list_add_tail(&tf->tf_list, &g_tf_list); 452 mutex_unlock(&g_tf_lock); 453 454 return 0; 455 } 456 EXPORT_SYMBOL(target_register_template); 457 458 void target_unregister_template(const struct target_core_fabric_ops *fo) 459 { 460 struct target_fabric_configfs *t; 461 462 mutex_lock(&g_tf_lock); 463 list_for_each_entry(t, &g_tf_list, tf_list) { 464 if (!strcmp(t->tf_name, fo->name)) { 465 BUG_ON(atomic_read(&t->tf_access_cnt)); 466 list_del(&t->tf_list); 467 kfree(t); 468 break; 469 } 470 } 471 mutex_unlock(&g_tf_lock); 472 } 473 EXPORT_SYMBOL(target_unregister_template); 474 475 /*############################################################################## 476 // Stop functions called by external Target Fabrics Modules 477 //############################################################################*/ 478 479 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 480 481 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 482 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 483 484 static struct configfs_item_operations target_core_dev_attrib_ops = { 485 .show_attribute = target_core_dev_attrib_attr_show, 486 .store_attribute = target_core_dev_attrib_attr_store, 487 }; 488 489 TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL); 490 491 /* End functions for struct config_item_type tb_dev_attrib_cit */ 492 493 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 494 495 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 496 #define SE_DEV_WWN_ATTR(_name, _mode) \ 497 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 498 __CONFIGFS_EATTR(_name, _mode, \ 499 target_core_dev_wwn_show_attr_##_name, \ 500 target_core_dev_wwn_store_attr_##_name); 501 502 #define SE_DEV_WWN_ATTR_RO(_name); \ 503 do { \ 504 static struct target_core_dev_wwn_attribute \ 505 target_core_dev_wwn_##_name = \ 506 __CONFIGFS_EATTR_RO(_name, \ 507 target_core_dev_wwn_show_attr_##_name); \ 508 } while (0); 509 510 /* 511 * VPD page 0x80 Unit serial 512 */ 513 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 514 struct t10_wwn *t10_wwn, 515 char *page) 516 { 517 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 518 &t10_wwn->unit_serial[0]); 519 } 520 521 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 522 struct t10_wwn *t10_wwn, 523 const char *page, 524 size_t count) 525 { 526 struct se_device *dev = t10_wwn->t10_dev; 527 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 528 529 /* 530 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 531 * from the struct scsi_device level firmware, do not allow 532 * VPD Unit Serial to be emulated. 533 * 534 * Note this struct scsi_device could also be emulating VPD 535 * information from its drivers/scsi LLD. But for now we assume 536 * it is doing 'the right thing' wrt a world wide unique 537 * VPD Unit Serial Number that OS dependent multipath can depend on. 538 */ 539 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 540 pr_err("Underlying SCSI device firmware provided VPD" 541 " Unit Serial, ignoring request\n"); 542 return -EOPNOTSUPP; 543 } 544 545 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 546 pr_err("Emulated VPD Unit Serial exceeds" 547 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 548 return -EOVERFLOW; 549 } 550 /* 551 * Check to see if any active $FABRIC_MOD exports exist. If they 552 * do exist, fail here as changing this information on the fly 553 * (underneath the initiator side OS dependent multipath code) 554 * could cause negative effects. 555 */ 556 if (dev->export_count) { 557 pr_err("Unable to set VPD Unit Serial while" 558 " active %d $FABRIC_MOD exports exist\n", 559 dev->export_count); 560 return -EINVAL; 561 } 562 563 /* 564 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 565 * 566 * Also, strip any newline added from the userspace 567 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 568 */ 569 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 570 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 571 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 572 "%s", strstrip(buf)); 573 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 574 575 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 576 " %s\n", dev->t10_wwn.unit_serial); 577 578 return count; 579 } 580 581 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 582 583 /* 584 * VPD page 0x83 Protocol Identifier 585 */ 586 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 587 struct t10_wwn *t10_wwn, 588 char *page) 589 { 590 struct t10_vpd *vpd; 591 unsigned char buf[VPD_TMP_BUF_SIZE]; 592 ssize_t len = 0; 593 594 memset(buf, 0, VPD_TMP_BUF_SIZE); 595 596 spin_lock(&t10_wwn->t10_vpd_lock); 597 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 598 if (!vpd->protocol_identifier_set) 599 continue; 600 601 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 602 603 if (len + strlen(buf) >= PAGE_SIZE) 604 break; 605 606 len += sprintf(page+len, "%s", buf); 607 } 608 spin_unlock(&t10_wwn->t10_vpd_lock); 609 610 return len; 611 } 612 613 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 614 struct t10_wwn *t10_wwn, 615 const char *page, 616 size_t count) 617 { 618 return -ENOSYS; 619 } 620 621 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 622 623 /* 624 * Generic wrapper for dumping VPD identifiers by association. 625 */ 626 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 627 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 628 struct t10_wwn *t10_wwn, \ 629 char *page) \ 630 { \ 631 struct t10_vpd *vpd; \ 632 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 633 ssize_t len = 0; \ 634 \ 635 spin_lock(&t10_wwn->t10_vpd_lock); \ 636 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 637 if (vpd->association != _assoc) \ 638 continue; \ 639 \ 640 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 641 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 642 if (len + strlen(buf) >= PAGE_SIZE) \ 643 break; \ 644 len += sprintf(page+len, "%s", buf); \ 645 \ 646 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 647 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 648 if (len + strlen(buf) >= PAGE_SIZE) \ 649 break; \ 650 len += sprintf(page+len, "%s", buf); \ 651 \ 652 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 653 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 654 if (len + strlen(buf) >= PAGE_SIZE) \ 655 break; \ 656 len += sprintf(page+len, "%s", buf); \ 657 } \ 658 spin_unlock(&t10_wwn->t10_vpd_lock); \ 659 \ 660 return len; \ 661 } 662 663 /* 664 * VPD page 0x83 Association: Logical Unit 665 */ 666 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 667 668 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 669 struct t10_wwn *t10_wwn, 670 const char *page, 671 size_t count) 672 { 673 return -ENOSYS; 674 } 675 676 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 677 678 /* 679 * VPD page 0x83 Association: Target Port 680 */ 681 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 682 683 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 684 struct t10_wwn *t10_wwn, 685 const char *page, 686 size_t count) 687 { 688 return -ENOSYS; 689 } 690 691 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 692 693 /* 694 * VPD page 0x83 Association: SCSI Target Device 695 */ 696 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 697 698 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 699 struct t10_wwn *t10_wwn, 700 const char *page, 701 size_t count) 702 { 703 return -ENOSYS; 704 } 705 706 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 707 708 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 709 710 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 711 &target_core_dev_wwn_vpd_unit_serial.attr, 712 &target_core_dev_wwn_vpd_protocol_identifier.attr, 713 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 714 &target_core_dev_wwn_vpd_assoc_target_port.attr, 715 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 716 NULL, 717 }; 718 719 static struct configfs_item_operations target_core_dev_wwn_ops = { 720 .show_attribute = target_core_dev_wwn_attr_show, 721 .store_attribute = target_core_dev_wwn_attr_store, 722 }; 723 724 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs); 725 726 /* End functions for struct config_item_type tb_dev_wwn_cit */ 727 728 /* Start functions for struct config_item_type tb_dev_pr_cit */ 729 730 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 731 #define SE_DEV_PR_ATTR(_name, _mode) \ 732 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 733 __CONFIGFS_EATTR(_name, _mode, \ 734 target_core_dev_pr_show_attr_##_name, \ 735 target_core_dev_pr_store_attr_##_name); 736 737 #define SE_DEV_PR_ATTR_RO(_name); \ 738 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 739 __CONFIGFS_EATTR_RO(_name, \ 740 target_core_dev_pr_show_attr_##_name); 741 742 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 743 char *page) 744 { 745 struct se_node_acl *se_nacl; 746 struct t10_pr_registration *pr_reg; 747 char i_buf[PR_REG_ISID_ID_LEN]; 748 749 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 750 751 pr_reg = dev->dev_pr_res_holder; 752 if (!pr_reg) 753 return sprintf(page, "No SPC-3 Reservation holder\n"); 754 755 se_nacl = pr_reg->pr_reg_nacl; 756 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 757 758 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 759 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 760 se_nacl->initiatorname, i_buf); 761 } 762 763 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 764 char *page) 765 { 766 struct se_node_acl *se_nacl; 767 ssize_t len; 768 769 se_nacl = dev->dev_reserved_node_acl; 770 if (se_nacl) { 771 len = sprintf(page, 772 "SPC-2 Reservation: %s Initiator: %s\n", 773 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 774 se_nacl->initiatorname); 775 } else { 776 len = sprintf(page, "No SPC-2 Reservation holder\n"); 777 } 778 return len; 779 } 780 781 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 782 char *page) 783 { 784 int ret; 785 786 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 787 return sprintf(page, "Passthrough\n"); 788 789 spin_lock(&dev->dev_reservation_lock); 790 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 791 ret = target_core_dev_pr_show_spc2_res(dev, page); 792 else 793 ret = target_core_dev_pr_show_spc3_res(dev, page); 794 spin_unlock(&dev->dev_reservation_lock); 795 return ret; 796 } 797 798 SE_DEV_PR_ATTR_RO(res_holder); 799 800 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 801 struct se_device *dev, char *page) 802 { 803 ssize_t len = 0; 804 805 spin_lock(&dev->dev_reservation_lock); 806 if (!dev->dev_pr_res_holder) { 807 len = sprintf(page, "No SPC-3 Reservation holder\n"); 808 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 809 len = sprintf(page, "SPC-3 Reservation: All Target" 810 " Ports registration\n"); 811 } else { 812 len = sprintf(page, "SPC-3 Reservation: Single" 813 " Target Port registration\n"); 814 } 815 816 spin_unlock(&dev->dev_reservation_lock); 817 return len; 818 } 819 820 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 821 822 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 823 struct se_device *dev, char *page) 824 { 825 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 826 } 827 828 SE_DEV_PR_ATTR_RO(res_pr_generation); 829 830 /* 831 * res_pr_holder_tg_port 832 */ 833 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 834 struct se_device *dev, char *page) 835 { 836 struct se_node_acl *se_nacl; 837 struct se_lun *lun; 838 struct se_portal_group *se_tpg; 839 struct t10_pr_registration *pr_reg; 840 const struct target_core_fabric_ops *tfo; 841 ssize_t len = 0; 842 843 spin_lock(&dev->dev_reservation_lock); 844 pr_reg = dev->dev_pr_res_holder; 845 if (!pr_reg) { 846 len = sprintf(page, "No SPC-3 Reservation holder\n"); 847 goto out_unlock; 848 } 849 850 se_nacl = pr_reg->pr_reg_nacl; 851 se_tpg = se_nacl->se_tpg; 852 lun = pr_reg->pr_reg_tg_pt_lun; 853 tfo = se_tpg->se_tpg_tfo; 854 855 len += sprintf(page+len, "SPC-3 Reservation: %s" 856 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 857 tfo->tpg_get_wwn(se_tpg)); 858 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 859 " Identifier Tag: %hu %s Portal Group Tag: %hu" 860 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 861 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 862 tfo->get_fabric_name(), lun->unpacked_lun); 863 864 out_unlock: 865 spin_unlock(&dev->dev_reservation_lock); 866 return len; 867 } 868 869 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 870 871 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 872 struct se_device *dev, char *page) 873 { 874 const struct target_core_fabric_ops *tfo; 875 struct t10_pr_registration *pr_reg; 876 unsigned char buf[384]; 877 char i_buf[PR_REG_ISID_ID_LEN]; 878 ssize_t len = 0; 879 int reg_count = 0; 880 881 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 882 883 spin_lock(&dev->t10_pr.registration_lock); 884 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 885 pr_reg_list) { 886 887 memset(buf, 0, 384); 888 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 889 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 890 core_pr_dump_initiator_port(pr_reg, i_buf, 891 PR_REG_ISID_ID_LEN); 892 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 893 tfo->get_fabric_name(), 894 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 895 pr_reg->pr_res_generation); 896 897 if (len + strlen(buf) >= PAGE_SIZE) 898 break; 899 900 len += sprintf(page+len, "%s", buf); 901 reg_count++; 902 } 903 spin_unlock(&dev->t10_pr.registration_lock); 904 905 if (!reg_count) 906 len += sprintf(page+len, "None\n"); 907 908 return len; 909 } 910 911 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 912 913 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 914 struct se_device *dev, char *page) 915 { 916 struct t10_pr_registration *pr_reg; 917 ssize_t len = 0; 918 919 spin_lock(&dev->dev_reservation_lock); 920 pr_reg = dev->dev_pr_res_holder; 921 if (pr_reg) { 922 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 923 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 924 } else { 925 len = sprintf(page, "No SPC-3 Reservation holder\n"); 926 } 927 928 spin_unlock(&dev->dev_reservation_lock); 929 return len; 930 } 931 932 SE_DEV_PR_ATTR_RO(res_pr_type); 933 934 static ssize_t target_core_dev_pr_show_attr_res_type( 935 struct se_device *dev, char *page) 936 { 937 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 938 return sprintf(page, "SPC_PASSTHROUGH\n"); 939 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 940 return sprintf(page, "SPC2_RESERVATIONS\n"); 941 else 942 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 943 } 944 945 SE_DEV_PR_ATTR_RO(res_type); 946 947 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 948 struct se_device *dev, char *page) 949 { 950 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 951 return 0; 952 953 return sprintf(page, "APTPL Bit Status: %s\n", 954 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 955 } 956 957 SE_DEV_PR_ATTR_RO(res_aptpl_active); 958 959 /* 960 * res_aptpl_metadata 961 */ 962 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 963 struct se_device *dev, char *page) 964 { 965 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 966 return 0; 967 968 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 969 } 970 971 enum { 972 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 973 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 974 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 975 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 976 }; 977 978 static match_table_t tokens = { 979 {Opt_initiator_fabric, "initiator_fabric=%s"}, 980 {Opt_initiator_node, "initiator_node=%s"}, 981 {Opt_initiator_sid, "initiator_sid=%s"}, 982 {Opt_sa_res_key, "sa_res_key=%s"}, 983 {Opt_res_holder, "res_holder=%d"}, 984 {Opt_res_type, "res_type=%d"}, 985 {Opt_res_scope, "res_scope=%d"}, 986 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 987 {Opt_mapped_lun, "mapped_lun=%d"}, 988 {Opt_target_fabric, "target_fabric=%s"}, 989 {Opt_target_node, "target_node=%s"}, 990 {Opt_tpgt, "tpgt=%d"}, 991 {Opt_port_rtpi, "port_rtpi=%d"}, 992 {Opt_target_lun, "target_lun=%d"}, 993 {Opt_err, NULL} 994 }; 995 996 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 997 struct se_device *dev, 998 const char *page, 999 size_t count) 1000 { 1001 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1002 unsigned char *t_fabric = NULL, *t_port = NULL; 1003 char *orig, *ptr, *opts; 1004 substring_t args[MAX_OPT_ARGS]; 1005 unsigned long long tmp_ll; 1006 u64 sa_res_key = 0; 1007 u32 mapped_lun = 0, target_lun = 0; 1008 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1009 u16 tpgt = 0; 1010 u8 type = 0; 1011 1012 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1013 return 0; 1014 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1015 return 0; 1016 1017 if (dev->export_count) { 1018 pr_debug("Unable to process APTPL metadata while" 1019 " active fabric exports exist\n"); 1020 return -EINVAL; 1021 } 1022 1023 opts = kstrdup(page, GFP_KERNEL); 1024 if (!opts) 1025 return -ENOMEM; 1026 1027 orig = opts; 1028 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1029 if (!*ptr) 1030 continue; 1031 1032 token = match_token(ptr, tokens, args); 1033 switch (token) { 1034 case Opt_initiator_fabric: 1035 i_fabric = match_strdup(args); 1036 if (!i_fabric) { 1037 ret = -ENOMEM; 1038 goto out; 1039 } 1040 break; 1041 case Opt_initiator_node: 1042 i_port = match_strdup(args); 1043 if (!i_port) { 1044 ret = -ENOMEM; 1045 goto out; 1046 } 1047 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1048 pr_err("APTPL metadata initiator_node=" 1049 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1050 PR_APTPL_MAX_IPORT_LEN); 1051 ret = -EINVAL; 1052 break; 1053 } 1054 break; 1055 case Opt_initiator_sid: 1056 isid = match_strdup(args); 1057 if (!isid) { 1058 ret = -ENOMEM; 1059 goto out; 1060 } 1061 if (strlen(isid) >= PR_REG_ISID_LEN) { 1062 pr_err("APTPL metadata initiator_isid" 1063 "= exceeds PR_REG_ISID_LEN: %d\n", 1064 PR_REG_ISID_LEN); 1065 ret = -EINVAL; 1066 break; 1067 } 1068 break; 1069 case Opt_sa_res_key: 1070 ret = kstrtoull(args->from, 0, &tmp_ll); 1071 if (ret < 0) { 1072 pr_err("kstrtoull() failed for sa_res_key=\n"); 1073 goto out; 1074 } 1075 sa_res_key = (u64)tmp_ll; 1076 break; 1077 /* 1078 * PR APTPL Metadata for Reservation 1079 */ 1080 case Opt_res_holder: 1081 match_int(args, &arg); 1082 res_holder = arg; 1083 break; 1084 case Opt_res_type: 1085 match_int(args, &arg); 1086 type = (u8)arg; 1087 break; 1088 case Opt_res_scope: 1089 match_int(args, &arg); 1090 break; 1091 case Opt_res_all_tg_pt: 1092 match_int(args, &arg); 1093 all_tg_pt = (int)arg; 1094 break; 1095 case Opt_mapped_lun: 1096 match_int(args, &arg); 1097 mapped_lun = (u32)arg; 1098 break; 1099 /* 1100 * PR APTPL Metadata for Target Port 1101 */ 1102 case Opt_target_fabric: 1103 t_fabric = match_strdup(args); 1104 if (!t_fabric) { 1105 ret = -ENOMEM; 1106 goto out; 1107 } 1108 break; 1109 case Opt_target_node: 1110 t_port = match_strdup(args); 1111 if (!t_port) { 1112 ret = -ENOMEM; 1113 goto out; 1114 } 1115 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1116 pr_err("APTPL metadata target_node=" 1117 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1118 PR_APTPL_MAX_TPORT_LEN); 1119 ret = -EINVAL; 1120 break; 1121 } 1122 break; 1123 case Opt_tpgt: 1124 match_int(args, &arg); 1125 tpgt = (u16)arg; 1126 break; 1127 case Opt_port_rtpi: 1128 match_int(args, &arg); 1129 break; 1130 case Opt_target_lun: 1131 match_int(args, &arg); 1132 target_lun = (u32)arg; 1133 break; 1134 default: 1135 break; 1136 } 1137 } 1138 1139 if (!i_port || !t_port || !sa_res_key) { 1140 pr_err("Illegal parameters for APTPL registration\n"); 1141 ret = -EINVAL; 1142 goto out; 1143 } 1144 1145 if (res_holder && !(type)) { 1146 pr_err("Illegal PR type: 0x%02x for reservation" 1147 " holder\n", type); 1148 ret = -EINVAL; 1149 goto out; 1150 } 1151 1152 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1153 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1154 res_holder, all_tg_pt, type); 1155 out: 1156 kfree(i_fabric); 1157 kfree(i_port); 1158 kfree(isid); 1159 kfree(t_fabric); 1160 kfree(t_port); 1161 kfree(orig); 1162 return (ret == 0) ? count : ret; 1163 } 1164 1165 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1166 1167 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1168 1169 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1170 &target_core_dev_pr_res_holder.attr, 1171 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1172 &target_core_dev_pr_res_pr_generation.attr, 1173 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1174 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1175 &target_core_dev_pr_res_pr_type.attr, 1176 &target_core_dev_pr_res_type.attr, 1177 &target_core_dev_pr_res_aptpl_active.attr, 1178 &target_core_dev_pr_res_aptpl_metadata.attr, 1179 NULL, 1180 }; 1181 1182 static struct configfs_item_operations target_core_dev_pr_ops = { 1183 .show_attribute = target_core_dev_pr_attr_show, 1184 .store_attribute = target_core_dev_pr_attr_store, 1185 }; 1186 1187 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs); 1188 1189 /* End functions for struct config_item_type tb_dev_pr_cit */ 1190 1191 /* Start functions for struct config_item_type tb_dev_cit */ 1192 1193 static ssize_t target_core_show_dev_info(void *p, char *page) 1194 { 1195 struct se_device *dev = p; 1196 struct se_subsystem_api *t = dev->transport; 1197 int bl = 0; 1198 ssize_t read_bytes = 0; 1199 1200 transport_dump_dev_state(dev, page, &bl); 1201 read_bytes += bl; 1202 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes); 1203 return read_bytes; 1204 } 1205 1206 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1207 .attr = { .ca_owner = THIS_MODULE, 1208 .ca_name = "info", 1209 .ca_mode = S_IRUGO }, 1210 .show = target_core_show_dev_info, 1211 .store = NULL, 1212 }; 1213 1214 static ssize_t target_core_store_dev_control( 1215 void *p, 1216 const char *page, 1217 size_t count) 1218 { 1219 struct se_device *dev = p; 1220 struct se_subsystem_api *t = dev->transport; 1221 1222 return t->set_configfs_dev_params(dev, page, count); 1223 } 1224 1225 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1226 .attr = { .ca_owner = THIS_MODULE, 1227 .ca_name = "control", 1228 .ca_mode = S_IWUSR }, 1229 .show = NULL, 1230 .store = target_core_store_dev_control, 1231 }; 1232 1233 static ssize_t target_core_show_dev_alias(void *p, char *page) 1234 { 1235 struct se_device *dev = p; 1236 1237 if (!(dev->dev_flags & DF_USING_ALIAS)) 1238 return 0; 1239 1240 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1241 } 1242 1243 static ssize_t target_core_store_dev_alias( 1244 void *p, 1245 const char *page, 1246 size_t count) 1247 { 1248 struct se_device *dev = p; 1249 struct se_hba *hba = dev->se_hba; 1250 ssize_t read_bytes; 1251 1252 if (count > (SE_DEV_ALIAS_LEN-1)) { 1253 pr_err("alias count: %d exceeds" 1254 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1255 SE_DEV_ALIAS_LEN-1); 1256 return -EINVAL; 1257 } 1258 1259 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1260 if (!read_bytes) 1261 return -EINVAL; 1262 if (dev->dev_alias[read_bytes - 1] == '\n') 1263 dev->dev_alias[read_bytes - 1] = '\0'; 1264 1265 dev->dev_flags |= DF_USING_ALIAS; 1266 1267 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1268 config_item_name(&hba->hba_group.cg_item), 1269 config_item_name(&dev->dev_group.cg_item), 1270 dev->dev_alias); 1271 1272 return read_bytes; 1273 } 1274 1275 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1276 .attr = { .ca_owner = THIS_MODULE, 1277 .ca_name = "alias", 1278 .ca_mode = S_IRUGO | S_IWUSR }, 1279 .show = target_core_show_dev_alias, 1280 .store = target_core_store_dev_alias, 1281 }; 1282 1283 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1284 { 1285 struct se_device *dev = p; 1286 1287 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1288 return 0; 1289 1290 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1291 } 1292 1293 static ssize_t target_core_store_dev_udev_path( 1294 void *p, 1295 const char *page, 1296 size_t count) 1297 { 1298 struct se_device *dev = p; 1299 struct se_hba *hba = dev->se_hba; 1300 ssize_t read_bytes; 1301 1302 if (count > (SE_UDEV_PATH_LEN-1)) { 1303 pr_err("udev_path count: %d exceeds" 1304 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1305 SE_UDEV_PATH_LEN-1); 1306 return -EINVAL; 1307 } 1308 1309 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1310 "%s", page); 1311 if (!read_bytes) 1312 return -EINVAL; 1313 if (dev->udev_path[read_bytes - 1] == '\n') 1314 dev->udev_path[read_bytes - 1] = '\0'; 1315 1316 dev->dev_flags |= DF_USING_UDEV_PATH; 1317 1318 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1319 config_item_name(&hba->hba_group.cg_item), 1320 config_item_name(&dev->dev_group.cg_item), 1321 dev->udev_path); 1322 1323 return read_bytes; 1324 } 1325 1326 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1327 .attr = { .ca_owner = THIS_MODULE, 1328 .ca_name = "udev_path", 1329 .ca_mode = S_IRUGO | S_IWUSR }, 1330 .show = target_core_show_dev_udev_path, 1331 .store = target_core_store_dev_udev_path, 1332 }; 1333 1334 static ssize_t target_core_show_dev_enable(void *p, char *page) 1335 { 1336 struct se_device *dev = p; 1337 1338 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1339 } 1340 1341 static ssize_t target_core_store_dev_enable( 1342 void *p, 1343 const char *page, 1344 size_t count) 1345 { 1346 struct se_device *dev = p; 1347 char *ptr; 1348 int ret; 1349 1350 ptr = strstr(page, "1"); 1351 if (!ptr) { 1352 pr_err("For dev_enable ops, only valid value" 1353 " is \"1\"\n"); 1354 return -EINVAL; 1355 } 1356 1357 ret = target_configure_device(dev); 1358 if (ret) 1359 return ret; 1360 return count; 1361 } 1362 1363 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1364 .attr = { .ca_owner = THIS_MODULE, 1365 .ca_name = "enable", 1366 .ca_mode = S_IRUGO | S_IWUSR }, 1367 .show = target_core_show_dev_enable, 1368 .store = target_core_store_dev_enable, 1369 }; 1370 1371 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1372 { 1373 struct se_device *dev = p; 1374 struct config_item *lu_ci; 1375 struct t10_alua_lu_gp *lu_gp; 1376 struct t10_alua_lu_gp_member *lu_gp_mem; 1377 ssize_t len = 0; 1378 1379 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1380 if (!lu_gp_mem) 1381 return 0; 1382 1383 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1384 lu_gp = lu_gp_mem->lu_gp; 1385 if (lu_gp) { 1386 lu_ci = &lu_gp->lu_gp_group.cg_item; 1387 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1388 config_item_name(lu_ci), lu_gp->lu_gp_id); 1389 } 1390 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1391 1392 return len; 1393 } 1394 1395 static ssize_t target_core_store_alua_lu_gp( 1396 void *p, 1397 const char *page, 1398 size_t count) 1399 { 1400 struct se_device *dev = p; 1401 struct se_hba *hba = dev->se_hba; 1402 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1403 struct t10_alua_lu_gp_member *lu_gp_mem; 1404 unsigned char buf[LU_GROUP_NAME_BUF]; 1405 int move = 0; 1406 1407 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1408 if (!lu_gp_mem) 1409 return 0; 1410 1411 if (count > LU_GROUP_NAME_BUF) { 1412 pr_err("ALUA LU Group Alias too large!\n"); 1413 return -EINVAL; 1414 } 1415 memset(buf, 0, LU_GROUP_NAME_BUF); 1416 memcpy(buf, page, count); 1417 /* 1418 * Any ALUA logical unit alias besides "NULL" means we will be 1419 * making a new group association. 1420 */ 1421 if (strcmp(strstrip(buf), "NULL")) { 1422 /* 1423 * core_alua_get_lu_gp_by_name() will increment reference to 1424 * struct t10_alua_lu_gp. This reference is released with 1425 * core_alua_get_lu_gp_by_name below(). 1426 */ 1427 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1428 if (!lu_gp_new) 1429 return -ENODEV; 1430 } 1431 1432 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1433 lu_gp = lu_gp_mem->lu_gp; 1434 if (lu_gp) { 1435 /* 1436 * Clearing an existing lu_gp association, and replacing 1437 * with NULL 1438 */ 1439 if (!lu_gp_new) { 1440 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1441 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1442 " %hu\n", 1443 config_item_name(&hba->hba_group.cg_item), 1444 config_item_name(&dev->dev_group.cg_item), 1445 config_item_name(&lu_gp->lu_gp_group.cg_item), 1446 lu_gp->lu_gp_id); 1447 1448 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1449 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1450 1451 return count; 1452 } 1453 /* 1454 * Removing existing association of lu_gp_mem with lu_gp 1455 */ 1456 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1457 move = 1; 1458 } 1459 /* 1460 * Associate lu_gp_mem with lu_gp_new. 1461 */ 1462 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1463 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1464 1465 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1466 " core/alua/lu_gps/%s, ID: %hu\n", 1467 (move) ? "Moving" : "Adding", 1468 config_item_name(&hba->hba_group.cg_item), 1469 config_item_name(&dev->dev_group.cg_item), 1470 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1471 lu_gp_new->lu_gp_id); 1472 1473 core_alua_put_lu_gp_from_name(lu_gp_new); 1474 return count; 1475 } 1476 1477 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1478 .attr = { .ca_owner = THIS_MODULE, 1479 .ca_name = "alua_lu_gp", 1480 .ca_mode = S_IRUGO | S_IWUSR }, 1481 .show = target_core_show_alua_lu_gp, 1482 .store = target_core_store_alua_lu_gp, 1483 }; 1484 1485 static ssize_t target_core_show_dev_lba_map(void *p, char *page) 1486 { 1487 struct se_device *dev = p; 1488 struct t10_alua_lba_map *map; 1489 struct t10_alua_lba_map_member *mem; 1490 char *b = page; 1491 int bl = 0; 1492 char state; 1493 1494 spin_lock(&dev->t10_alua.lba_map_lock); 1495 if (!list_empty(&dev->t10_alua.lba_map_list)) 1496 bl += sprintf(b + bl, "%u %u\n", 1497 dev->t10_alua.lba_map_segment_size, 1498 dev->t10_alua.lba_map_segment_multiplier); 1499 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 1500 bl += sprintf(b + bl, "%llu %llu", 1501 map->lba_map_first_lba, map->lba_map_last_lba); 1502 list_for_each_entry(mem, &map->lba_map_mem_list, 1503 lba_map_mem_list) { 1504 switch (mem->lba_map_mem_alua_state) { 1505 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 1506 state = 'O'; 1507 break; 1508 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 1509 state = 'A'; 1510 break; 1511 case ALUA_ACCESS_STATE_STANDBY: 1512 state = 'S'; 1513 break; 1514 case ALUA_ACCESS_STATE_UNAVAILABLE: 1515 state = 'U'; 1516 break; 1517 default: 1518 state = '.'; 1519 break; 1520 } 1521 bl += sprintf(b + bl, " %d:%c", 1522 mem->lba_map_mem_alua_pg_id, state); 1523 } 1524 bl += sprintf(b + bl, "\n"); 1525 } 1526 spin_unlock(&dev->t10_alua.lba_map_lock); 1527 return bl; 1528 } 1529 1530 static ssize_t target_core_store_dev_lba_map( 1531 void *p, 1532 const char *page, 1533 size_t count) 1534 { 1535 struct se_device *dev = p; 1536 struct t10_alua_lba_map *lba_map = NULL; 1537 struct list_head lba_list; 1538 char *map_entries, *ptr; 1539 char state; 1540 int pg_num = -1, pg; 1541 int ret = 0, num = 0, pg_id, alua_state; 1542 unsigned long start_lba = -1, end_lba = -1; 1543 unsigned long segment_size = -1, segment_mult = -1; 1544 1545 map_entries = kstrdup(page, GFP_KERNEL); 1546 if (!map_entries) 1547 return -ENOMEM; 1548 1549 INIT_LIST_HEAD(&lba_list); 1550 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 1551 if (!*ptr) 1552 continue; 1553 1554 if (num == 0) { 1555 if (sscanf(ptr, "%lu %lu\n", 1556 &segment_size, &segment_mult) != 2) { 1557 pr_err("Invalid line %d\n", num); 1558 ret = -EINVAL; 1559 break; 1560 } 1561 num++; 1562 continue; 1563 } 1564 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 1565 pr_err("Invalid line %d\n", num); 1566 ret = -EINVAL; 1567 break; 1568 } 1569 ptr = strchr(ptr, ' '); 1570 if (!ptr) { 1571 pr_err("Invalid line %d, missing end lba\n", num); 1572 ret = -EINVAL; 1573 break; 1574 } 1575 ptr++; 1576 ptr = strchr(ptr, ' '); 1577 if (!ptr) { 1578 pr_err("Invalid line %d, missing state definitions\n", 1579 num); 1580 ret = -EINVAL; 1581 break; 1582 } 1583 ptr++; 1584 lba_map = core_alua_allocate_lba_map(&lba_list, 1585 start_lba, end_lba); 1586 if (IS_ERR(lba_map)) { 1587 ret = PTR_ERR(lba_map); 1588 break; 1589 } 1590 pg = 0; 1591 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 1592 switch (state) { 1593 case 'O': 1594 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 1595 break; 1596 case 'A': 1597 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 1598 break; 1599 case 'S': 1600 alua_state = ALUA_ACCESS_STATE_STANDBY; 1601 break; 1602 case 'U': 1603 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 1604 break; 1605 default: 1606 pr_err("Invalid ALUA state '%c'\n", state); 1607 ret = -EINVAL; 1608 goto out; 1609 } 1610 1611 ret = core_alua_allocate_lba_map_mem(lba_map, 1612 pg_id, alua_state); 1613 if (ret) { 1614 pr_err("Invalid target descriptor %d:%c " 1615 "at line %d\n", 1616 pg_id, state, num); 1617 break; 1618 } 1619 pg++; 1620 ptr = strchr(ptr, ' '); 1621 if (ptr) 1622 ptr++; 1623 else 1624 break; 1625 } 1626 if (pg_num == -1) 1627 pg_num = pg; 1628 else if (pg != pg_num) { 1629 pr_err("Only %d from %d port groups definitions " 1630 "at line %d\n", pg, pg_num, num); 1631 ret = -EINVAL; 1632 break; 1633 } 1634 num++; 1635 } 1636 out: 1637 if (ret) { 1638 core_alua_free_lba_map(&lba_list); 1639 count = ret; 1640 } else 1641 core_alua_set_lba_map(dev, &lba_list, 1642 segment_size, segment_mult); 1643 kfree(map_entries); 1644 return count; 1645 } 1646 1647 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = { 1648 .attr = { .ca_owner = THIS_MODULE, 1649 .ca_name = "lba_map", 1650 .ca_mode = S_IRUGO | S_IWUSR }, 1651 .show = target_core_show_dev_lba_map, 1652 .store = target_core_store_dev_lba_map, 1653 }; 1654 1655 static struct configfs_attribute *target_core_dev_attrs[] = { 1656 &target_core_attr_dev_info.attr, 1657 &target_core_attr_dev_control.attr, 1658 &target_core_attr_dev_alias.attr, 1659 &target_core_attr_dev_udev_path.attr, 1660 &target_core_attr_dev_enable.attr, 1661 &target_core_attr_dev_alua_lu_gp.attr, 1662 &target_core_attr_dev_lba_map.attr, 1663 NULL, 1664 }; 1665 1666 static void target_core_dev_release(struct config_item *item) 1667 { 1668 struct config_group *dev_cg = to_config_group(item); 1669 struct se_device *dev = 1670 container_of(dev_cg, struct se_device, dev_group); 1671 1672 kfree(dev_cg->default_groups); 1673 target_free_device(dev); 1674 } 1675 1676 static ssize_t target_core_dev_show(struct config_item *item, 1677 struct configfs_attribute *attr, 1678 char *page) 1679 { 1680 struct config_group *dev_cg = to_config_group(item); 1681 struct se_device *dev = 1682 container_of(dev_cg, struct se_device, dev_group); 1683 struct target_core_configfs_attribute *tc_attr = container_of( 1684 attr, struct target_core_configfs_attribute, attr); 1685 1686 if (!tc_attr->show) 1687 return -EINVAL; 1688 1689 return tc_attr->show(dev, page); 1690 } 1691 1692 static ssize_t target_core_dev_store(struct config_item *item, 1693 struct configfs_attribute *attr, 1694 const char *page, size_t count) 1695 { 1696 struct config_group *dev_cg = to_config_group(item); 1697 struct se_device *dev = 1698 container_of(dev_cg, struct se_device, dev_group); 1699 struct target_core_configfs_attribute *tc_attr = container_of( 1700 attr, struct target_core_configfs_attribute, attr); 1701 1702 if (!tc_attr->store) 1703 return -EINVAL; 1704 1705 return tc_attr->store(dev, page, count); 1706 } 1707 1708 static struct configfs_item_operations target_core_dev_item_ops = { 1709 .release = target_core_dev_release, 1710 .show_attribute = target_core_dev_show, 1711 .store_attribute = target_core_dev_store, 1712 }; 1713 1714 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 1715 1716 /* End functions for struct config_item_type tb_dev_cit */ 1717 1718 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 1719 1720 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 1721 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 1722 static struct target_core_alua_lu_gp_attribute \ 1723 target_core_alua_lu_gp_##_name = \ 1724 __CONFIGFS_EATTR(_name, _mode, \ 1725 target_core_alua_lu_gp_show_attr_##_name, \ 1726 target_core_alua_lu_gp_store_attr_##_name); 1727 1728 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 1729 static struct target_core_alua_lu_gp_attribute \ 1730 target_core_alua_lu_gp_##_name = \ 1731 __CONFIGFS_EATTR_RO(_name, \ 1732 target_core_alua_lu_gp_show_attr_##_name); 1733 1734 /* 1735 * lu_gp_id 1736 */ 1737 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 1738 struct t10_alua_lu_gp *lu_gp, 1739 char *page) 1740 { 1741 if (!lu_gp->lu_gp_valid_id) 1742 return 0; 1743 1744 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 1745 } 1746 1747 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 1748 struct t10_alua_lu_gp *lu_gp, 1749 const char *page, 1750 size_t count) 1751 { 1752 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 1753 unsigned long lu_gp_id; 1754 int ret; 1755 1756 ret = kstrtoul(page, 0, &lu_gp_id); 1757 if (ret < 0) { 1758 pr_err("kstrtoul() returned %d for" 1759 " lu_gp_id\n", ret); 1760 return ret; 1761 } 1762 if (lu_gp_id > 0x0000ffff) { 1763 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 1764 " 0x0000ffff\n", lu_gp_id); 1765 return -EINVAL; 1766 } 1767 1768 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 1769 if (ret < 0) 1770 return -EINVAL; 1771 1772 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 1773 " Group: core/alua/lu_gps/%s to ID: %hu\n", 1774 config_item_name(&alua_lu_gp_cg->cg_item), 1775 lu_gp->lu_gp_id); 1776 1777 return count; 1778 } 1779 1780 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 1781 1782 /* 1783 * members 1784 */ 1785 static ssize_t target_core_alua_lu_gp_show_attr_members( 1786 struct t10_alua_lu_gp *lu_gp, 1787 char *page) 1788 { 1789 struct se_device *dev; 1790 struct se_hba *hba; 1791 struct t10_alua_lu_gp_member *lu_gp_mem; 1792 ssize_t len = 0, cur_len; 1793 unsigned char buf[LU_GROUP_NAME_BUF]; 1794 1795 memset(buf, 0, LU_GROUP_NAME_BUF); 1796 1797 spin_lock(&lu_gp->lu_gp_lock); 1798 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 1799 dev = lu_gp_mem->lu_gp_mem_dev; 1800 hba = dev->se_hba; 1801 1802 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 1803 config_item_name(&hba->hba_group.cg_item), 1804 config_item_name(&dev->dev_group.cg_item)); 1805 cur_len++; /* Extra byte for NULL terminator */ 1806 1807 if ((cur_len + len) > PAGE_SIZE) { 1808 pr_warn("Ran out of lu_gp_show_attr" 1809 "_members buffer\n"); 1810 break; 1811 } 1812 memcpy(page+len, buf, cur_len); 1813 len += cur_len; 1814 } 1815 spin_unlock(&lu_gp->lu_gp_lock); 1816 1817 return len; 1818 } 1819 1820 SE_DEV_ALUA_LU_ATTR_RO(members); 1821 1822 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 1823 1824 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 1825 &target_core_alua_lu_gp_lu_gp_id.attr, 1826 &target_core_alua_lu_gp_members.attr, 1827 NULL, 1828 }; 1829 1830 static void target_core_alua_lu_gp_release(struct config_item *item) 1831 { 1832 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1833 struct t10_alua_lu_gp, lu_gp_group); 1834 1835 core_alua_free_lu_gp(lu_gp); 1836 } 1837 1838 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 1839 .release = target_core_alua_lu_gp_release, 1840 .show_attribute = target_core_alua_lu_gp_attr_show, 1841 .store_attribute = target_core_alua_lu_gp_attr_store, 1842 }; 1843 1844 static struct config_item_type target_core_alua_lu_gp_cit = { 1845 .ct_item_ops = &target_core_alua_lu_gp_ops, 1846 .ct_attrs = target_core_alua_lu_gp_attrs, 1847 .ct_owner = THIS_MODULE, 1848 }; 1849 1850 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 1851 1852 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 1853 1854 static struct config_group *target_core_alua_create_lu_gp( 1855 struct config_group *group, 1856 const char *name) 1857 { 1858 struct t10_alua_lu_gp *lu_gp; 1859 struct config_group *alua_lu_gp_cg = NULL; 1860 struct config_item *alua_lu_gp_ci = NULL; 1861 1862 lu_gp = core_alua_allocate_lu_gp(name, 0); 1863 if (IS_ERR(lu_gp)) 1864 return NULL; 1865 1866 alua_lu_gp_cg = &lu_gp->lu_gp_group; 1867 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 1868 1869 config_group_init_type_name(alua_lu_gp_cg, name, 1870 &target_core_alua_lu_gp_cit); 1871 1872 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 1873 " Group: core/alua/lu_gps/%s\n", 1874 config_item_name(alua_lu_gp_ci)); 1875 1876 return alua_lu_gp_cg; 1877 1878 } 1879 1880 static void target_core_alua_drop_lu_gp( 1881 struct config_group *group, 1882 struct config_item *item) 1883 { 1884 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1885 struct t10_alua_lu_gp, lu_gp_group); 1886 1887 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 1888 " Group: core/alua/lu_gps/%s, ID: %hu\n", 1889 config_item_name(item), lu_gp->lu_gp_id); 1890 /* 1891 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 1892 * -> target_core_alua_lu_gp_release() 1893 */ 1894 config_item_put(item); 1895 } 1896 1897 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 1898 .make_group = &target_core_alua_create_lu_gp, 1899 .drop_item = &target_core_alua_drop_lu_gp, 1900 }; 1901 1902 static struct config_item_type target_core_alua_lu_gps_cit = { 1903 .ct_item_ops = NULL, 1904 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 1905 .ct_owner = THIS_MODULE, 1906 }; 1907 1908 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 1909 1910 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 1911 1912 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 1913 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 1914 static struct target_core_alua_tg_pt_gp_attribute \ 1915 target_core_alua_tg_pt_gp_##_name = \ 1916 __CONFIGFS_EATTR(_name, _mode, \ 1917 target_core_alua_tg_pt_gp_show_attr_##_name, \ 1918 target_core_alua_tg_pt_gp_store_attr_##_name); 1919 1920 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 1921 static struct target_core_alua_tg_pt_gp_attribute \ 1922 target_core_alua_tg_pt_gp_##_name = \ 1923 __CONFIGFS_EATTR_RO(_name, \ 1924 target_core_alua_tg_pt_gp_show_attr_##_name); 1925 1926 /* 1927 * alua_access_state 1928 */ 1929 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 1930 struct t10_alua_tg_pt_gp *tg_pt_gp, 1931 char *page) 1932 { 1933 return sprintf(page, "%d\n", 1934 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 1935 } 1936 1937 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 1938 struct t10_alua_tg_pt_gp *tg_pt_gp, 1939 const char *page, 1940 size_t count) 1941 { 1942 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 1943 unsigned long tmp; 1944 int new_state, ret; 1945 1946 if (!tg_pt_gp->tg_pt_gp_valid_id) { 1947 pr_err("Unable to do implicit ALUA on non valid" 1948 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 1949 return -EINVAL; 1950 } 1951 if (!(dev->dev_flags & DF_CONFIGURED)) { 1952 pr_err("Unable to set alua_access_state while device is" 1953 " not configured\n"); 1954 return -ENODEV; 1955 } 1956 1957 ret = kstrtoul(page, 0, &tmp); 1958 if (ret < 0) { 1959 pr_err("Unable to extract new ALUA access state from" 1960 " %s\n", page); 1961 return ret; 1962 } 1963 new_state = (int)tmp; 1964 1965 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 1966 pr_err("Unable to process implicit configfs ALUA" 1967 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 1968 return -EINVAL; 1969 } 1970 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 1971 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 1972 /* LBA DEPENDENT is only allowed with implicit ALUA */ 1973 pr_err("Unable to process implicit configfs ALUA transition" 1974 " while explicit ALUA management is enabled\n"); 1975 return -EINVAL; 1976 } 1977 1978 ret = core_alua_do_port_transition(tg_pt_gp, dev, 1979 NULL, NULL, new_state, 0); 1980 return (!ret) ? count : -EINVAL; 1981 } 1982 1983 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 1984 1985 /* 1986 * alua_access_status 1987 */ 1988 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 1989 struct t10_alua_tg_pt_gp *tg_pt_gp, 1990 char *page) 1991 { 1992 return sprintf(page, "%s\n", 1993 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 1994 } 1995 1996 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 1997 struct t10_alua_tg_pt_gp *tg_pt_gp, 1998 const char *page, 1999 size_t count) 2000 { 2001 unsigned long tmp; 2002 int new_status, ret; 2003 2004 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2005 pr_err("Unable to do set ALUA access status on non" 2006 " valid tg_pt_gp ID: %hu\n", 2007 tg_pt_gp->tg_pt_gp_valid_id); 2008 return -EINVAL; 2009 } 2010 2011 ret = kstrtoul(page, 0, &tmp); 2012 if (ret < 0) { 2013 pr_err("Unable to extract new ALUA access status" 2014 " from %s\n", page); 2015 return ret; 2016 } 2017 new_status = (int)tmp; 2018 2019 if ((new_status != ALUA_STATUS_NONE) && 2020 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2021 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2022 pr_err("Illegal ALUA access status: 0x%02x\n", 2023 new_status); 2024 return -EINVAL; 2025 } 2026 2027 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2028 return count; 2029 } 2030 2031 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2032 2033 /* 2034 * alua_access_type 2035 */ 2036 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2037 struct t10_alua_tg_pt_gp *tg_pt_gp, 2038 char *page) 2039 { 2040 return core_alua_show_access_type(tg_pt_gp, page); 2041 } 2042 2043 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2044 struct t10_alua_tg_pt_gp *tg_pt_gp, 2045 const char *page, 2046 size_t count) 2047 { 2048 return core_alua_store_access_type(tg_pt_gp, page, count); 2049 } 2050 2051 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2052 2053 /* 2054 * alua_supported_states 2055 */ 2056 2057 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \ 2058 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \ 2059 struct t10_alua_tg_pt_gp *t, char *p) \ 2060 { \ 2061 return sprintf(p, "%d\n", !!(t->_var & _bit)); \ 2062 } 2063 2064 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \ 2065 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\ 2066 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \ 2067 { \ 2068 unsigned long tmp; \ 2069 int ret; \ 2070 \ 2071 if (!t->tg_pt_gp_valid_id) { \ 2072 pr_err("Unable to do set ##_name ALUA state on non" \ 2073 " valid tg_pt_gp ID: %hu\n", \ 2074 t->tg_pt_gp_valid_id); \ 2075 return -EINVAL; \ 2076 } \ 2077 \ 2078 ret = kstrtoul(p, 0, &tmp); \ 2079 if (ret < 0) { \ 2080 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2081 return -EINVAL; \ 2082 } \ 2083 if (tmp > 1) { \ 2084 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2085 return -EINVAL; \ 2086 } \ 2087 if (tmp) \ 2088 t->_var |= _bit; \ 2089 else \ 2090 t->_var &= ~_bit; \ 2091 \ 2092 return c; \ 2093 } 2094 2095 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning, 2096 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2097 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning, 2098 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2099 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR); 2100 2101 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline, 2102 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2103 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline, 2104 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2105 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR); 2106 2107 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent, 2108 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2109 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent, 2110 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2111 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO); 2112 2113 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable, 2114 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2115 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable, 2116 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2117 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR); 2118 2119 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby, 2120 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2121 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby, 2122 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2123 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR); 2124 2125 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized, 2126 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2127 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized, 2128 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2129 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR); 2130 2131 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized, 2132 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2133 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized, 2134 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2135 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR); 2136 2137 /* 2138 * alua_write_metadata 2139 */ 2140 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2141 struct t10_alua_tg_pt_gp *tg_pt_gp, 2142 char *page) 2143 { 2144 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2145 } 2146 2147 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2148 struct t10_alua_tg_pt_gp *tg_pt_gp, 2149 const char *page, 2150 size_t count) 2151 { 2152 unsigned long tmp; 2153 int ret; 2154 2155 ret = kstrtoul(page, 0, &tmp); 2156 if (ret < 0) { 2157 pr_err("Unable to extract alua_write_metadata\n"); 2158 return ret; 2159 } 2160 2161 if ((tmp != 0) && (tmp != 1)) { 2162 pr_err("Illegal value for alua_write_metadata:" 2163 " %lu\n", tmp); 2164 return -EINVAL; 2165 } 2166 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2167 2168 return count; 2169 } 2170 2171 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2172 2173 2174 2175 /* 2176 * nonop_delay_msecs 2177 */ 2178 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2179 struct t10_alua_tg_pt_gp *tg_pt_gp, 2180 char *page) 2181 { 2182 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2183 2184 } 2185 2186 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2187 struct t10_alua_tg_pt_gp *tg_pt_gp, 2188 const char *page, 2189 size_t count) 2190 { 2191 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2192 } 2193 2194 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2195 2196 /* 2197 * trans_delay_msecs 2198 */ 2199 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2200 struct t10_alua_tg_pt_gp *tg_pt_gp, 2201 char *page) 2202 { 2203 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2204 } 2205 2206 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2207 struct t10_alua_tg_pt_gp *tg_pt_gp, 2208 const char *page, 2209 size_t count) 2210 { 2211 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2212 } 2213 2214 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2215 2216 /* 2217 * implicit_trans_secs 2218 */ 2219 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs( 2220 struct t10_alua_tg_pt_gp *tg_pt_gp, 2221 char *page) 2222 { 2223 return core_alua_show_implicit_trans_secs(tg_pt_gp, page); 2224 } 2225 2226 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs( 2227 struct t10_alua_tg_pt_gp *tg_pt_gp, 2228 const char *page, 2229 size_t count) 2230 { 2231 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count); 2232 } 2233 2234 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR); 2235 2236 /* 2237 * preferred 2238 */ 2239 2240 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2241 struct t10_alua_tg_pt_gp *tg_pt_gp, 2242 char *page) 2243 { 2244 return core_alua_show_preferred_bit(tg_pt_gp, page); 2245 } 2246 2247 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2248 struct t10_alua_tg_pt_gp *tg_pt_gp, 2249 const char *page, 2250 size_t count) 2251 { 2252 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2253 } 2254 2255 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2256 2257 /* 2258 * tg_pt_gp_id 2259 */ 2260 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2261 struct t10_alua_tg_pt_gp *tg_pt_gp, 2262 char *page) 2263 { 2264 if (!tg_pt_gp->tg_pt_gp_valid_id) 2265 return 0; 2266 2267 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2268 } 2269 2270 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2271 struct t10_alua_tg_pt_gp *tg_pt_gp, 2272 const char *page, 2273 size_t count) 2274 { 2275 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2276 unsigned long tg_pt_gp_id; 2277 int ret; 2278 2279 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2280 if (ret < 0) { 2281 pr_err("kstrtoul() returned %d for" 2282 " tg_pt_gp_id\n", ret); 2283 return ret; 2284 } 2285 if (tg_pt_gp_id > 0x0000ffff) { 2286 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2287 " 0x0000ffff\n", tg_pt_gp_id); 2288 return -EINVAL; 2289 } 2290 2291 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2292 if (ret < 0) 2293 return -EINVAL; 2294 2295 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2296 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2297 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2298 tg_pt_gp->tg_pt_gp_id); 2299 2300 return count; 2301 } 2302 2303 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2304 2305 /* 2306 * members 2307 */ 2308 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2309 struct t10_alua_tg_pt_gp *tg_pt_gp, 2310 char *page) 2311 { 2312 struct se_port *port; 2313 struct se_portal_group *tpg; 2314 struct se_lun *lun; 2315 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2316 ssize_t len = 0, cur_len; 2317 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2318 2319 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2320 2321 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2322 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2323 tg_pt_gp_mem_list) { 2324 port = tg_pt_gp_mem->tg_pt; 2325 tpg = port->sep_tpg; 2326 lun = port->sep_lun; 2327 2328 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2329 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2330 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2331 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2332 config_item_name(&lun->lun_group.cg_item)); 2333 cur_len++; /* Extra byte for NULL terminator */ 2334 2335 if ((cur_len + len) > PAGE_SIZE) { 2336 pr_warn("Ran out of lu_gp_show_attr" 2337 "_members buffer\n"); 2338 break; 2339 } 2340 memcpy(page+len, buf, cur_len); 2341 len += cur_len; 2342 } 2343 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2344 2345 return len; 2346 } 2347 2348 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2349 2350 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2351 tg_pt_gp_group); 2352 2353 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2354 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2355 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2356 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2357 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr, 2358 &target_core_alua_tg_pt_gp_alua_support_offline.attr, 2359 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr, 2360 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr, 2361 &target_core_alua_tg_pt_gp_alua_support_standby.attr, 2362 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr, 2363 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr, 2364 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2365 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2366 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2367 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr, 2368 &target_core_alua_tg_pt_gp_preferred.attr, 2369 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2370 &target_core_alua_tg_pt_gp_members.attr, 2371 NULL, 2372 }; 2373 2374 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2375 { 2376 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2377 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2378 2379 core_alua_free_tg_pt_gp(tg_pt_gp); 2380 } 2381 2382 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2383 .release = target_core_alua_tg_pt_gp_release, 2384 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2385 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2386 }; 2387 2388 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2389 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2390 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2391 .ct_owner = THIS_MODULE, 2392 }; 2393 2394 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2395 2396 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2397 2398 static struct config_group *target_core_alua_create_tg_pt_gp( 2399 struct config_group *group, 2400 const char *name) 2401 { 2402 struct t10_alua *alua = container_of(group, struct t10_alua, 2403 alua_tg_pt_gps_group); 2404 struct t10_alua_tg_pt_gp *tg_pt_gp; 2405 struct config_group *alua_tg_pt_gp_cg = NULL; 2406 struct config_item *alua_tg_pt_gp_ci = NULL; 2407 2408 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2409 if (!tg_pt_gp) 2410 return NULL; 2411 2412 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2413 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2414 2415 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2416 &target_core_alua_tg_pt_gp_cit); 2417 2418 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2419 " Group: alua/tg_pt_gps/%s\n", 2420 config_item_name(alua_tg_pt_gp_ci)); 2421 2422 return alua_tg_pt_gp_cg; 2423 } 2424 2425 static void target_core_alua_drop_tg_pt_gp( 2426 struct config_group *group, 2427 struct config_item *item) 2428 { 2429 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2430 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2431 2432 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2433 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2434 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2435 /* 2436 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2437 * -> target_core_alua_tg_pt_gp_release(). 2438 */ 2439 config_item_put(item); 2440 } 2441 2442 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2443 .make_group = &target_core_alua_create_tg_pt_gp, 2444 .drop_item = &target_core_alua_drop_tg_pt_gp, 2445 }; 2446 2447 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 2448 2449 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2450 2451 /* Start functions for struct config_item_type target_core_alua_cit */ 2452 2453 /* 2454 * target_core_alua_cit is a ConfigFS group that lives under 2455 * /sys/kernel/config/target/core/alua. There are default groups 2456 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2457 * target_core_alua_cit in target_core_init_configfs() below. 2458 */ 2459 static struct config_item_type target_core_alua_cit = { 2460 .ct_item_ops = NULL, 2461 .ct_attrs = NULL, 2462 .ct_owner = THIS_MODULE, 2463 }; 2464 2465 /* End functions for struct config_item_type target_core_alua_cit */ 2466 2467 /* Start functions for struct config_item_type tb_dev_stat_cit */ 2468 2469 static struct config_group *target_core_stat_mkdir( 2470 struct config_group *group, 2471 const char *name) 2472 { 2473 return ERR_PTR(-ENOSYS); 2474 } 2475 2476 static void target_core_stat_rmdir( 2477 struct config_group *group, 2478 struct config_item *item) 2479 { 2480 return; 2481 } 2482 2483 static struct configfs_group_operations target_core_stat_group_ops = { 2484 .make_group = &target_core_stat_mkdir, 2485 .drop_item = &target_core_stat_rmdir, 2486 }; 2487 2488 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 2489 2490 /* End functions for struct config_item_type tb_dev_stat_cit */ 2491 2492 /* Start functions for struct config_item_type target_core_hba_cit */ 2493 2494 static struct config_group *target_core_make_subdev( 2495 struct config_group *group, 2496 const char *name) 2497 { 2498 struct t10_alua_tg_pt_gp *tg_pt_gp; 2499 struct se_subsystem_api *t; 2500 struct config_item *hba_ci = &group->cg_item; 2501 struct se_hba *hba = item_to_hba(hba_ci); 2502 struct se_device *dev; 2503 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2504 struct config_group *dev_stat_grp = NULL; 2505 int errno = -ENOMEM, ret; 2506 2507 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2508 if (ret) 2509 return ERR_PTR(ret); 2510 /* 2511 * Locate the struct se_subsystem_api from parent's struct se_hba. 2512 */ 2513 t = hba->transport; 2514 2515 dev = target_alloc_device(hba, name); 2516 if (!dev) 2517 goto out_unlock; 2518 2519 dev_cg = &dev->dev_group; 2520 2521 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2522 GFP_KERNEL); 2523 if (!dev_cg->default_groups) 2524 goto out_free_device; 2525 2526 config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit); 2527 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2528 &t->tb_cits.tb_dev_attrib_cit); 2529 config_group_init_type_name(&dev->dev_pr_group, "pr", 2530 &t->tb_cits.tb_dev_pr_cit); 2531 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2532 &t->tb_cits.tb_dev_wwn_cit); 2533 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2534 "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit); 2535 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2536 "statistics", &t->tb_cits.tb_dev_stat_cit); 2537 2538 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2539 dev_cg->default_groups[1] = &dev->dev_pr_group; 2540 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2541 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2542 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2543 dev_cg->default_groups[5] = NULL; 2544 /* 2545 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2546 */ 2547 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2548 if (!tg_pt_gp) 2549 goto out_free_dev_cg_default_groups; 2550 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2551 2552 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2553 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2554 GFP_KERNEL); 2555 if (!tg_pt_gp_cg->default_groups) { 2556 pr_err("Unable to allocate tg_pt_gp_cg->" 2557 "default_groups\n"); 2558 goto out_free_tg_pt_gp; 2559 } 2560 2561 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2562 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2563 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2564 tg_pt_gp_cg->default_groups[1] = NULL; 2565 /* 2566 * Add core/$HBA/$DEV/statistics/ default groups 2567 */ 2568 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2569 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2570 GFP_KERNEL); 2571 if (!dev_stat_grp->default_groups) { 2572 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2573 goto out_free_tg_pt_gp_cg_default_groups; 2574 } 2575 target_stat_setup_dev_default_groups(dev); 2576 2577 mutex_unlock(&hba->hba_access_mutex); 2578 return dev_cg; 2579 2580 out_free_tg_pt_gp_cg_default_groups: 2581 kfree(tg_pt_gp_cg->default_groups); 2582 out_free_tg_pt_gp: 2583 core_alua_free_tg_pt_gp(tg_pt_gp); 2584 out_free_dev_cg_default_groups: 2585 kfree(dev_cg->default_groups); 2586 out_free_device: 2587 target_free_device(dev); 2588 out_unlock: 2589 mutex_unlock(&hba->hba_access_mutex); 2590 return ERR_PTR(errno); 2591 } 2592 2593 static void target_core_drop_subdev( 2594 struct config_group *group, 2595 struct config_item *item) 2596 { 2597 struct config_group *dev_cg = to_config_group(item); 2598 struct se_device *dev = 2599 container_of(dev_cg, struct se_device, dev_group); 2600 struct se_hba *hba; 2601 struct config_item *df_item; 2602 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2603 int i; 2604 2605 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2606 2607 mutex_lock(&hba->hba_access_mutex); 2608 2609 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2610 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2611 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2612 dev_stat_grp->default_groups[i] = NULL; 2613 config_item_put(df_item); 2614 } 2615 kfree(dev_stat_grp->default_groups); 2616 2617 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2618 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2619 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2620 tg_pt_gp_cg->default_groups[i] = NULL; 2621 config_item_put(df_item); 2622 } 2623 kfree(tg_pt_gp_cg->default_groups); 2624 /* 2625 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2626 * directly from target_core_alua_tg_pt_gp_release(). 2627 */ 2628 dev->t10_alua.default_tg_pt_gp = NULL; 2629 2630 for (i = 0; dev_cg->default_groups[i]; i++) { 2631 df_item = &dev_cg->default_groups[i]->cg_item; 2632 dev_cg->default_groups[i] = NULL; 2633 config_item_put(df_item); 2634 } 2635 /* 2636 * se_dev is released from target_core_dev_item_ops->release() 2637 */ 2638 config_item_put(item); 2639 mutex_unlock(&hba->hba_access_mutex); 2640 } 2641 2642 static struct configfs_group_operations target_core_hba_group_ops = { 2643 .make_group = target_core_make_subdev, 2644 .drop_item = target_core_drop_subdev, 2645 }; 2646 2647 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2648 #define SE_HBA_ATTR(_name, _mode) \ 2649 static struct target_core_hba_attribute \ 2650 target_core_hba_##_name = \ 2651 __CONFIGFS_EATTR(_name, _mode, \ 2652 target_core_hba_show_attr_##_name, \ 2653 target_core_hba_store_attr_##_name); 2654 2655 #define SE_HBA_ATTR_RO(_name) \ 2656 static struct target_core_hba_attribute \ 2657 target_core_hba_##_name = \ 2658 __CONFIGFS_EATTR_RO(_name, \ 2659 target_core_hba_show_attr_##_name); 2660 2661 static ssize_t target_core_hba_show_attr_hba_info( 2662 struct se_hba *hba, 2663 char *page) 2664 { 2665 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2666 hba->hba_id, hba->transport->name, 2667 TARGET_CORE_CONFIGFS_VERSION); 2668 } 2669 2670 SE_HBA_ATTR_RO(hba_info); 2671 2672 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2673 char *page) 2674 { 2675 int hba_mode = 0; 2676 2677 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2678 hba_mode = 1; 2679 2680 return sprintf(page, "%d\n", hba_mode); 2681 } 2682 2683 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2684 const char *page, size_t count) 2685 { 2686 struct se_subsystem_api *transport = hba->transport; 2687 unsigned long mode_flag; 2688 int ret; 2689 2690 if (transport->pmode_enable_hba == NULL) 2691 return -EINVAL; 2692 2693 ret = kstrtoul(page, 0, &mode_flag); 2694 if (ret < 0) { 2695 pr_err("Unable to extract hba mode flag: %d\n", ret); 2696 return ret; 2697 } 2698 2699 if (hba->dev_count) { 2700 pr_err("Unable to set hba_mode with active devices\n"); 2701 return -EINVAL; 2702 } 2703 2704 ret = transport->pmode_enable_hba(hba, mode_flag); 2705 if (ret < 0) 2706 return -EINVAL; 2707 if (ret > 0) 2708 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2709 else if (ret == 0) 2710 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2711 2712 return count; 2713 } 2714 2715 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2716 2717 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2718 2719 static void target_core_hba_release(struct config_item *item) 2720 { 2721 struct se_hba *hba = container_of(to_config_group(item), 2722 struct se_hba, hba_group); 2723 core_delete_hba(hba); 2724 } 2725 2726 static struct configfs_attribute *target_core_hba_attrs[] = { 2727 &target_core_hba_hba_info.attr, 2728 &target_core_hba_hba_mode.attr, 2729 NULL, 2730 }; 2731 2732 static struct configfs_item_operations target_core_hba_item_ops = { 2733 .release = target_core_hba_release, 2734 .show_attribute = target_core_hba_attr_show, 2735 .store_attribute = target_core_hba_attr_store, 2736 }; 2737 2738 static struct config_item_type target_core_hba_cit = { 2739 .ct_item_ops = &target_core_hba_item_ops, 2740 .ct_group_ops = &target_core_hba_group_ops, 2741 .ct_attrs = target_core_hba_attrs, 2742 .ct_owner = THIS_MODULE, 2743 }; 2744 2745 static struct config_group *target_core_call_addhbatotarget( 2746 struct config_group *group, 2747 const char *name) 2748 { 2749 char *se_plugin_str, *str, *str2; 2750 struct se_hba *hba; 2751 char buf[TARGET_CORE_NAME_MAX_LEN]; 2752 unsigned long plugin_dep_id = 0; 2753 int ret; 2754 2755 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 2756 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 2757 pr_err("Passed *name strlen(): %d exceeds" 2758 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 2759 TARGET_CORE_NAME_MAX_LEN); 2760 return ERR_PTR(-ENAMETOOLONG); 2761 } 2762 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 2763 2764 str = strstr(buf, "_"); 2765 if (!str) { 2766 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 2767 return ERR_PTR(-EINVAL); 2768 } 2769 se_plugin_str = buf; 2770 /* 2771 * Special case for subsystem plugins that have "_" in their names. 2772 * Namely rd_direct and rd_mcp.. 2773 */ 2774 str2 = strstr(str+1, "_"); 2775 if (str2) { 2776 *str2 = '\0'; /* Terminate for *se_plugin_str */ 2777 str2++; /* Skip to start of plugin dependent ID */ 2778 str = str2; 2779 } else { 2780 *str = '\0'; /* Terminate for *se_plugin_str */ 2781 str++; /* Skip to start of plugin dependent ID */ 2782 } 2783 2784 ret = kstrtoul(str, 0, &plugin_dep_id); 2785 if (ret < 0) { 2786 pr_err("kstrtoul() returned %d for" 2787 " plugin_dep_id\n", ret); 2788 return ERR_PTR(ret); 2789 } 2790 /* 2791 * Load up TCM subsystem plugins if they have not already been loaded. 2792 */ 2793 transport_subsystem_check_init(); 2794 2795 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 2796 if (IS_ERR(hba)) 2797 return ERR_CAST(hba); 2798 2799 config_group_init_type_name(&hba->hba_group, name, 2800 &target_core_hba_cit); 2801 2802 return &hba->hba_group; 2803 } 2804 2805 static void target_core_call_delhbafromtarget( 2806 struct config_group *group, 2807 struct config_item *item) 2808 { 2809 /* 2810 * core_delete_hba() is called from target_core_hba_item_ops->release() 2811 * -> target_core_hba_release() 2812 */ 2813 config_item_put(item); 2814 } 2815 2816 static struct configfs_group_operations target_core_group_ops = { 2817 .make_group = target_core_call_addhbatotarget, 2818 .drop_item = target_core_call_delhbafromtarget, 2819 }; 2820 2821 static struct config_item_type target_core_cit = { 2822 .ct_item_ops = NULL, 2823 .ct_group_ops = &target_core_group_ops, 2824 .ct_attrs = NULL, 2825 .ct_owner = THIS_MODULE, 2826 }; 2827 2828 /* Stop functions for struct config_item_type target_core_hba_cit */ 2829 2830 void target_core_setup_sub_cits(struct se_subsystem_api *sa) 2831 { 2832 target_core_setup_dev_cit(sa); 2833 target_core_setup_dev_attrib_cit(sa); 2834 target_core_setup_dev_pr_cit(sa); 2835 target_core_setup_dev_wwn_cit(sa); 2836 target_core_setup_dev_alua_tg_pt_gps_cit(sa); 2837 target_core_setup_dev_stat_cit(sa); 2838 } 2839 EXPORT_SYMBOL(target_core_setup_sub_cits); 2840 2841 static int __init target_core_init_configfs(void) 2842 { 2843 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 2844 struct config_group *lu_gp_cg = NULL; 2845 struct configfs_subsystem *subsys = &target_core_fabrics; 2846 struct t10_alua_lu_gp *lu_gp; 2847 int ret; 2848 2849 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 2850 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 2851 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 2852 2853 config_group_init(&subsys->su_group); 2854 mutex_init(&subsys->su_mutex); 2855 2856 ret = init_se_kmem_caches(); 2857 if (ret < 0) 2858 return ret; 2859 /* 2860 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 2861 * and ALUA Logical Unit Group and Target Port Group infrastructure. 2862 */ 2863 target_cg = &subsys->su_group; 2864 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2865 GFP_KERNEL); 2866 if (!target_cg->default_groups) { 2867 pr_err("Unable to allocate target_cg->default_groups\n"); 2868 ret = -ENOMEM; 2869 goto out_global; 2870 } 2871 2872 config_group_init_type_name(&target_core_hbagroup, 2873 "core", &target_core_cit); 2874 target_cg->default_groups[0] = &target_core_hbagroup; 2875 target_cg->default_groups[1] = NULL; 2876 /* 2877 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 2878 */ 2879 hba_cg = &target_core_hbagroup; 2880 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2881 GFP_KERNEL); 2882 if (!hba_cg->default_groups) { 2883 pr_err("Unable to allocate hba_cg->default_groups\n"); 2884 ret = -ENOMEM; 2885 goto out_global; 2886 } 2887 config_group_init_type_name(&alua_group, 2888 "alua", &target_core_alua_cit); 2889 hba_cg->default_groups[0] = &alua_group; 2890 hba_cg->default_groups[1] = NULL; 2891 /* 2892 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 2893 * groups under /sys/kernel/config/target/core/alua/ 2894 */ 2895 alua_cg = &alua_group; 2896 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2897 GFP_KERNEL); 2898 if (!alua_cg->default_groups) { 2899 pr_err("Unable to allocate alua_cg->default_groups\n"); 2900 ret = -ENOMEM; 2901 goto out_global; 2902 } 2903 2904 config_group_init_type_name(&alua_lu_gps_group, 2905 "lu_gps", &target_core_alua_lu_gps_cit); 2906 alua_cg->default_groups[0] = &alua_lu_gps_group; 2907 alua_cg->default_groups[1] = NULL; 2908 /* 2909 * Add core/alua/lu_gps/default_lu_gp 2910 */ 2911 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 2912 if (IS_ERR(lu_gp)) { 2913 ret = -ENOMEM; 2914 goto out_global; 2915 } 2916 2917 lu_gp_cg = &alua_lu_gps_group; 2918 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2919 GFP_KERNEL); 2920 if (!lu_gp_cg->default_groups) { 2921 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 2922 ret = -ENOMEM; 2923 goto out_global; 2924 } 2925 2926 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 2927 &target_core_alua_lu_gp_cit); 2928 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 2929 lu_gp_cg->default_groups[1] = NULL; 2930 default_lu_gp = lu_gp; 2931 /* 2932 * Register the target_core_mod subsystem with configfs. 2933 */ 2934 ret = configfs_register_subsystem(subsys); 2935 if (ret < 0) { 2936 pr_err("Error %d while registering subsystem %s\n", 2937 ret, subsys->su_group.cg_item.ci_namebuf); 2938 goto out_global; 2939 } 2940 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 2941 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 2942 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 2943 /* 2944 * Register built-in RAMDISK subsystem logic for virtual LUN 0 2945 */ 2946 ret = rd_module_init(); 2947 if (ret < 0) 2948 goto out; 2949 2950 ret = core_dev_setup_virtual_lun0(); 2951 if (ret < 0) 2952 goto out; 2953 2954 ret = target_xcopy_setup_pt(); 2955 if (ret < 0) 2956 goto out; 2957 2958 return 0; 2959 2960 out: 2961 configfs_unregister_subsystem(subsys); 2962 core_dev_release_virtual_lun0(); 2963 rd_module_exit(); 2964 out_global: 2965 if (default_lu_gp) { 2966 core_alua_free_lu_gp(default_lu_gp); 2967 default_lu_gp = NULL; 2968 } 2969 if (lu_gp_cg) 2970 kfree(lu_gp_cg->default_groups); 2971 if (alua_cg) 2972 kfree(alua_cg->default_groups); 2973 if (hba_cg) 2974 kfree(hba_cg->default_groups); 2975 kfree(target_cg->default_groups); 2976 release_se_kmem_caches(); 2977 return ret; 2978 } 2979 2980 static void __exit target_core_exit_configfs(void) 2981 { 2982 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 2983 struct config_item *item; 2984 int i; 2985 2986 lu_gp_cg = &alua_lu_gps_group; 2987 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 2988 item = &lu_gp_cg->default_groups[i]->cg_item; 2989 lu_gp_cg->default_groups[i] = NULL; 2990 config_item_put(item); 2991 } 2992 kfree(lu_gp_cg->default_groups); 2993 lu_gp_cg->default_groups = NULL; 2994 2995 alua_cg = &alua_group; 2996 for (i = 0; alua_cg->default_groups[i]; i++) { 2997 item = &alua_cg->default_groups[i]->cg_item; 2998 alua_cg->default_groups[i] = NULL; 2999 config_item_put(item); 3000 } 3001 kfree(alua_cg->default_groups); 3002 alua_cg->default_groups = NULL; 3003 3004 hba_cg = &target_core_hbagroup; 3005 for (i = 0; hba_cg->default_groups[i]; i++) { 3006 item = &hba_cg->default_groups[i]->cg_item; 3007 hba_cg->default_groups[i] = NULL; 3008 config_item_put(item); 3009 } 3010 kfree(hba_cg->default_groups); 3011 hba_cg->default_groups = NULL; 3012 /* 3013 * We expect subsys->su_group.default_groups to be released 3014 * by configfs subsystem provider logic.. 3015 */ 3016 configfs_unregister_subsystem(&target_core_fabrics); 3017 kfree(target_core_fabrics.su_group.default_groups); 3018 3019 core_alua_free_lu_gp(default_lu_gp); 3020 default_lu_gp = NULL; 3021 3022 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3023 " Infrastructure\n"); 3024 3025 core_dev_release_virtual_lun0(); 3026 rd_module_exit(); 3027 target_xcopy_release_pt(); 3028 release_se_kmem_caches(); 3029 } 3030 3031 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3032 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3033 MODULE_LICENSE("GPL"); 3034 3035 module_init(target_core_init_configfs); 3036 module_exit(target_core_exit_configfs); 3037