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 extern struct t10_alua_lu_gp *default_lu_gp; 54 55 static LIST_HEAD(g_tf_list); 56 static DEFINE_MUTEX(g_tf_lock); 57 58 struct target_core_configfs_attribute { 59 struct configfs_attribute attr; 60 ssize_t (*show)(void *, char *); 61 ssize_t (*store)(void *, const char *, size_t); 62 }; 63 64 static struct config_group target_core_hbagroup; 65 static struct config_group alua_group; 66 static struct config_group alua_lu_gps_group; 67 68 static inline struct se_hba * 69 item_to_hba(struct config_item *item) 70 { 71 return container_of(to_config_group(item), struct se_hba, hba_group); 72 } 73 74 /* 75 * Attributes for /sys/kernel/config/target/ 76 */ 77 static ssize_t target_core_attr_show(struct config_item *item, 78 struct configfs_attribute *attr, 79 char *page) 80 { 81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 83 utsname()->sysname, utsname()->machine); 84 } 85 86 static struct configfs_item_operations target_core_fabric_item_ops = { 87 .show_attribute = target_core_attr_show, 88 }; 89 90 static struct configfs_attribute target_core_item_attr_version = { 91 .ca_owner = THIS_MODULE, 92 .ca_name = "version", 93 .ca_mode = S_IRUGO, 94 }; 95 96 static struct target_fabric_configfs *target_core_get_fabric( 97 const char *name) 98 { 99 struct target_fabric_configfs *tf; 100 101 if (!name) 102 return NULL; 103 104 mutex_lock(&g_tf_lock); 105 list_for_each_entry(tf, &g_tf_list, tf_list) { 106 if (!strcmp(tf->tf_name, name)) { 107 atomic_inc(&tf->tf_access_cnt); 108 mutex_unlock(&g_tf_lock); 109 return tf; 110 } 111 } 112 mutex_unlock(&g_tf_lock); 113 114 return NULL; 115 } 116 117 /* 118 * Called from struct target_core_group_ops->make_group() 119 */ 120 static struct config_group *target_core_register_fabric( 121 struct config_group *group, 122 const char *name) 123 { 124 struct target_fabric_configfs *tf; 125 int ret; 126 127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 128 " %s\n", group, name); 129 /* 130 * Below are some hardcoded request_module() calls to automatically 131 * local fabric modules when the following is called: 132 * 133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 134 * 135 * Note that this does not limit which TCM fabric module can be 136 * registered, but simply provids auto loading logic for modules with 137 * mkdir(2) system calls with known TCM fabric modules. 138 */ 139 if (!strncmp(name, "iscsi", 5)) { 140 /* 141 * Automatically load the LIO Target fabric module when the 142 * following is called: 143 * 144 * mkdir -p $CONFIGFS/target/iscsi 145 */ 146 ret = request_module("iscsi_target_mod"); 147 if (ret < 0) { 148 pr_err("request_module() failed for" 149 " iscsi_target_mod.ko: %d\n", ret); 150 return ERR_PTR(-EINVAL); 151 } 152 } else if (!strncmp(name, "loopback", 8)) { 153 /* 154 * Automatically load the tcm_loop fabric module when the 155 * following is called: 156 * 157 * mkdir -p $CONFIGFS/target/loopback 158 */ 159 ret = request_module("tcm_loop"); 160 if (ret < 0) { 161 pr_err("request_module() failed for" 162 " tcm_loop.ko: %d\n", ret); 163 return ERR_PTR(-EINVAL); 164 } 165 } 166 167 tf = target_core_get_fabric(name); 168 if (!tf) { 169 pr_err("target_core_get_fabric() failed for %s\n", 170 name); 171 return ERR_PTR(-EINVAL); 172 } 173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 174 " %s\n", tf->tf_name); 175 /* 176 * On a successful target_core_get_fabric() look, the returned 177 * struct target_fabric_configfs *tf will contain a usage reference. 178 */ 179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 180 &tf->tf_cit_tmpl.tfc_wwn_cit); 181 182 tf->tf_group.default_groups = tf->tf_default_groups; 183 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 184 tf->tf_group.default_groups[1] = NULL; 185 186 config_group_init_type_name(&tf->tf_group, name, 187 &tf->tf_cit_tmpl.tfc_wwn_cit); 188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 189 &tf->tf_cit_tmpl.tfc_discovery_cit); 190 191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 192 " %s\n", tf->tf_group.cg_item.ci_name); 193 /* 194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 195 */ 196 tf->tf_ops.tf_subsys = tf->tf_subsys; 197 tf->tf_fabric = &tf->tf_group.cg_item; 198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 199 " for %s\n", name); 200 201 return &tf->tf_group; 202 } 203 204 /* 205 * Called from struct target_core_group_ops->drop_item() 206 */ 207 static void target_core_deregister_fabric( 208 struct config_group *group, 209 struct config_item *item) 210 { 211 struct target_fabric_configfs *tf = container_of( 212 to_config_group(item), struct target_fabric_configfs, tf_group); 213 struct config_group *tf_group; 214 struct config_item *df_item; 215 int i; 216 217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 218 " tf list\n", config_item_name(item)); 219 220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 221 " %s\n", tf->tf_name); 222 atomic_dec(&tf->tf_access_cnt); 223 224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 225 " tf->tf_fabric for %s\n", tf->tf_name); 226 tf->tf_fabric = NULL; 227 228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 229 " %s\n", config_item_name(item)); 230 231 tf_group = &tf->tf_group; 232 for (i = 0; tf_group->default_groups[i]; i++) { 233 df_item = &tf_group->default_groups[i]->cg_item; 234 tf_group->default_groups[i] = NULL; 235 config_item_put(df_item); 236 } 237 config_item_put(item); 238 } 239 240 static struct configfs_group_operations target_core_fabric_group_ops = { 241 .make_group = &target_core_register_fabric, 242 .drop_item = &target_core_deregister_fabric, 243 }; 244 245 /* 246 * All item attributes appearing in /sys/kernel/target/ appear here. 247 */ 248 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 249 &target_core_item_attr_version, 250 NULL, 251 }; 252 253 /* 254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 255 */ 256 static struct config_item_type target_core_fabrics_item = { 257 .ct_item_ops = &target_core_fabric_item_ops, 258 .ct_group_ops = &target_core_fabric_group_ops, 259 .ct_attrs = target_core_fabric_item_attrs, 260 .ct_owner = THIS_MODULE, 261 }; 262 263 static struct configfs_subsystem target_core_fabrics = { 264 .su_group = { 265 .cg_item = { 266 .ci_namebuf = "target", 267 .ci_type = &target_core_fabrics_item, 268 }, 269 }, 270 }; 271 272 struct configfs_subsystem *target_core_subsystem[] = { 273 &target_core_fabrics, 274 NULL, 275 }; 276 277 /*############################################################################## 278 // Start functions called by external Target Fabrics Modules 279 //############################################################################*/ 280 281 /* 282 * First function called by fabric modules to: 283 * 284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 285 * 2) Add struct target_fabric_configfs to g_tf_list 286 * 3) Return struct target_fabric_configfs to fabric module to be passed 287 * into target_fabric_configfs_register(). 288 */ 289 struct target_fabric_configfs *target_fabric_configfs_init( 290 struct module *fabric_mod, 291 const char *name) 292 { 293 struct target_fabric_configfs *tf; 294 295 if (!(name)) { 296 pr_err("Unable to locate passed fabric name\n"); 297 return ERR_PTR(-EINVAL); 298 } 299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 300 pr_err("Passed name: %s exceeds TARGET_FABRIC" 301 "_NAME_SIZE\n", name); 302 return ERR_PTR(-EINVAL); 303 } 304 305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 306 if (!tf) 307 return ERR_PTR(-ENOMEM); 308 309 INIT_LIST_HEAD(&tf->tf_list); 310 atomic_set(&tf->tf_access_cnt, 0); 311 /* 312 * Setup the default generic struct config_item_type's (cits) in 313 * struct target_fabric_configfs->tf_cit_tmpl 314 */ 315 tf->tf_module = fabric_mod; 316 target_fabric_setup_cits(tf); 317 318 tf->tf_subsys = target_core_subsystem[0]; 319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 320 321 mutex_lock(&g_tf_lock); 322 list_add_tail(&tf->tf_list, &g_tf_list); 323 mutex_unlock(&g_tf_lock); 324 325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 326 ">>>>>>>>>>>>>>\n"); 327 pr_debug("Initialized struct target_fabric_configfs: %p for" 328 " %s\n", tf, tf->tf_name); 329 return tf; 330 } 331 EXPORT_SYMBOL(target_fabric_configfs_init); 332 333 /* 334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 335 */ 336 void target_fabric_configfs_free( 337 struct target_fabric_configfs *tf) 338 { 339 mutex_lock(&g_tf_lock); 340 list_del(&tf->tf_list); 341 mutex_unlock(&g_tf_lock); 342 343 kfree(tf); 344 } 345 EXPORT_SYMBOL(target_fabric_configfs_free); 346 347 /* 348 * Perform a sanity check of the passed tf->tf_ops before completing 349 * TCM fabric module registration. 350 */ 351 static int target_fabric_tf_ops_check( 352 struct target_fabric_configfs *tf) 353 { 354 struct target_core_fabric_ops *tfo = &tf->tf_ops; 355 356 if (!tfo->get_fabric_name) { 357 pr_err("Missing tfo->get_fabric_name()\n"); 358 return -EINVAL; 359 } 360 if (!tfo->get_fabric_proto_ident) { 361 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_get_wwn) { 365 pr_err("Missing tfo->tpg_get_wwn()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_get_tag) { 369 pr_err("Missing tfo->tpg_get_tag()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_get_default_depth) { 373 pr_err("Missing tfo->tpg_get_default_depth()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_get_pr_transport_id) { 377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_pr_transport_id_len) { 381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->tpg_check_demo_mode) { 385 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->tpg_check_demo_mode_cache) { 389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->tpg_check_demo_mode_write_protect) { 393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->tpg_check_prod_mode_write_protect) { 397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->tpg_alloc_fabric_acl) { 401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->tpg_release_fabric_acl) { 405 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->tpg_get_inst_index) { 409 pr_err("Missing tfo->tpg_get_inst_index()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->release_cmd) { 413 pr_err("Missing tfo->release_cmd()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->shutdown_session) { 417 pr_err("Missing tfo->shutdown_session()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->close_session) { 421 pr_err("Missing tfo->close_session()\n"); 422 return -EINVAL; 423 } 424 if (!tfo->sess_get_index) { 425 pr_err("Missing tfo->sess_get_index()\n"); 426 return -EINVAL; 427 } 428 if (!tfo->write_pending) { 429 pr_err("Missing tfo->write_pending()\n"); 430 return -EINVAL; 431 } 432 if (!tfo->write_pending_status) { 433 pr_err("Missing tfo->write_pending_status()\n"); 434 return -EINVAL; 435 } 436 if (!tfo->set_default_node_attributes) { 437 pr_err("Missing tfo->set_default_node_attributes()\n"); 438 return -EINVAL; 439 } 440 if (!tfo->get_task_tag) { 441 pr_err("Missing tfo->get_task_tag()\n"); 442 return -EINVAL; 443 } 444 if (!tfo->get_cmd_state) { 445 pr_err("Missing tfo->get_cmd_state()\n"); 446 return -EINVAL; 447 } 448 if (!tfo->queue_data_in) { 449 pr_err("Missing tfo->queue_data_in()\n"); 450 return -EINVAL; 451 } 452 if (!tfo->queue_status) { 453 pr_err("Missing tfo->queue_status()\n"); 454 return -EINVAL; 455 } 456 if (!tfo->queue_tm_rsp) { 457 pr_err("Missing tfo->queue_tm_rsp()\n"); 458 return -EINVAL; 459 } 460 /* 461 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 462 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 463 * target_core_fabric_configfs.c WWN+TPG group context code. 464 */ 465 if (!tfo->fabric_make_wwn) { 466 pr_err("Missing tfo->fabric_make_wwn()\n"); 467 return -EINVAL; 468 } 469 if (!tfo->fabric_drop_wwn) { 470 pr_err("Missing tfo->fabric_drop_wwn()\n"); 471 return -EINVAL; 472 } 473 if (!tfo->fabric_make_tpg) { 474 pr_err("Missing tfo->fabric_make_tpg()\n"); 475 return -EINVAL; 476 } 477 if (!tfo->fabric_drop_tpg) { 478 pr_err("Missing tfo->fabric_drop_tpg()\n"); 479 return -EINVAL; 480 } 481 482 return 0; 483 } 484 485 /* 486 * Called 2nd from fabric module with returned parameter of 487 * struct target_fabric_configfs * from target_fabric_configfs_init(). 488 * 489 * Upon a successful registration, the new fabric's struct config_item is 490 * return. Also, a pointer to this struct is set in the passed 491 * struct target_fabric_configfs. 492 */ 493 int target_fabric_configfs_register( 494 struct target_fabric_configfs *tf) 495 { 496 int ret; 497 498 if (!tf) { 499 pr_err("Unable to locate target_fabric_configfs" 500 " pointer\n"); 501 return -EINVAL; 502 } 503 if (!tf->tf_subsys) { 504 pr_err("Unable to target struct config_subsystem" 505 " pointer\n"); 506 return -EINVAL; 507 } 508 ret = target_fabric_tf_ops_check(tf); 509 if (ret < 0) 510 return ret; 511 512 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 513 ">>>>>>>>>>\n"); 514 return 0; 515 } 516 EXPORT_SYMBOL(target_fabric_configfs_register); 517 518 void target_fabric_configfs_deregister( 519 struct target_fabric_configfs *tf) 520 { 521 struct configfs_subsystem *su; 522 523 if (!tf) { 524 pr_err("Unable to locate passed target_fabric_" 525 "configfs\n"); 526 return; 527 } 528 su = tf->tf_subsys; 529 if (!su) { 530 pr_err("Unable to locate passed tf->tf_subsys" 531 " pointer\n"); 532 return; 533 } 534 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 535 ">>>>>>>>>>>>\n"); 536 mutex_lock(&g_tf_lock); 537 if (atomic_read(&tf->tf_access_cnt)) { 538 mutex_unlock(&g_tf_lock); 539 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 540 tf->tf_name); 541 BUG(); 542 } 543 list_del(&tf->tf_list); 544 mutex_unlock(&g_tf_lock); 545 546 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 547 " %s\n", tf->tf_name); 548 tf->tf_module = NULL; 549 tf->tf_subsys = NULL; 550 kfree(tf); 551 552 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 553 ">>>>>\n"); 554 } 555 EXPORT_SYMBOL(target_fabric_configfs_deregister); 556 557 /*############################################################################## 558 // Stop functions called by external Target Fabrics Modules 559 //############################################################################*/ 560 561 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 562 563 #define DEF_DEV_ATTRIB_SHOW(_name) \ 564 static ssize_t target_core_dev_show_attr_##_name( \ 565 struct se_dev_attrib *da, \ 566 char *page) \ 567 { \ 568 return snprintf(page, PAGE_SIZE, "%u\n", \ 569 (u32)da->da_dev->dev_attrib._name); \ 570 } 571 572 #define DEF_DEV_ATTRIB_STORE(_name) \ 573 static ssize_t target_core_dev_store_attr_##_name( \ 574 struct se_dev_attrib *da, \ 575 const char *page, \ 576 size_t count) \ 577 { \ 578 unsigned long val; \ 579 int ret; \ 580 \ 581 ret = kstrtoul(page, 0, &val); \ 582 if (ret < 0) { \ 583 pr_err("kstrtoul() failed with" \ 584 " ret: %d\n", ret); \ 585 return -EINVAL; \ 586 } \ 587 ret = se_dev_set_##_name(da->da_dev, (u32)val); \ 588 \ 589 return (!ret) ? count : -EINVAL; \ 590 } 591 592 #define DEF_DEV_ATTRIB(_name) \ 593 DEF_DEV_ATTRIB_SHOW(_name); \ 594 DEF_DEV_ATTRIB_STORE(_name); 595 596 #define DEF_DEV_ATTRIB_RO(_name) \ 597 DEF_DEV_ATTRIB_SHOW(_name); 598 599 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 600 #define SE_DEV_ATTR(_name, _mode) \ 601 static struct target_core_dev_attrib_attribute \ 602 target_core_dev_attrib_##_name = \ 603 __CONFIGFS_EATTR(_name, _mode, \ 604 target_core_dev_show_attr_##_name, \ 605 target_core_dev_store_attr_##_name); 606 607 #define SE_DEV_ATTR_RO(_name); \ 608 static struct target_core_dev_attrib_attribute \ 609 target_core_dev_attrib_##_name = \ 610 __CONFIGFS_EATTR_RO(_name, \ 611 target_core_dev_show_attr_##_name); 612 613 DEF_DEV_ATTRIB(emulate_model_alias); 614 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR); 615 616 DEF_DEV_ATTRIB(emulate_dpo); 617 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 618 619 DEF_DEV_ATTRIB(emulate_fua_write); 620 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 621 622 DEF_DEV_ATTRIB(emulate_fua_read); 623 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 624 625 DEF_DEV_ATTRIB(emulate_write_cache); 626 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 627 628 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 629 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 630 631 DEF_DEV_ATTRIB(emulate_tas); 632 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 633 634 DEF_DEV_ATTRIB(emulate_tpu); 635 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 636 637 DEF_DEV_ATTRIB(emulate_tpws); 638 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 639 640 DEF_DEV_ATTRIB(emulate_caw); 641 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR); 642 643 DEF_DEV_ATTRIB(emulate_3pc); 644 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR); 645 646 DEF_DEV_ATTRIB(enforce_pr_isids); 647 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 648 649 DEF_DEV_ATTRIB(is_nonrot); 650 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 651 652 DEF_DEV_ATTRIB(emulate_rest_reord); 653 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 654 655 DEF_DEV_ATTRIB_RO(hw_block_size); 656 SE_DEV_ATTR_RO(hw_block_size); 657 658 DEF_DEV_ATTRIB(block_size); 659 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 660 661 DEF_DEV_ATTRIB_RO(hw_max_sectors); 662 SE_DEV_ATTR_RO(hw_max_sectors); 663 664 DEF_DEV_ATTRIB(fabric_max_sectors); 665 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR); 666 667 DEF_DEV_ATTRIB(optimal_sectors); 668 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 669 670 DEF_DEV_ATTRIB_RO(hw_queue_depth); 671 SE_DEV_ATTR_RO(hw_queue_depth); 672 673 DEF_DEV_ATTRIB(queue_depth); 674 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 675 676 DEF_DEV_ATTRIB(max_unmap_lba_count); 677 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 678 679 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 680 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 681 682 DEF_DEV_ATTRIB(unmap_granularity); 683 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 684 685 DEF_DEV_ATTRIB(unmap_granularity_alignment); 686 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 687 688 DEF_DEV_ATTRIB(max_write_same_len); 689 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR); 690 691 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 692 693 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 694 &target_core_dev_attrib_emulate_model_alias.attr, 695 &target_core_dev_attrib_emulate_dpo.attr, 696 &target_core_dev_attrib_emulate_fua_write.attr, 697 &target_core_dev_attrib_emulate_fua_read.attr, 698 &target_core_dev_attrib_emulate_write_cache.attr, 699 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 700 &target_core_dev_attrib_emulate_tas.attr, 701 &target_core_dev_attrib_emulate_tpu.attr, 702 &target_core_dev_attrib_emulate_tpws.attr, 703 &target_core_dev_attrib_emulate_caw.attr, 704 &target_core_dev_attrib_emulate_3pc.attr, 705 &target_core_dev_attrib_enforce_pr_isids.attr, 706 &target_core_dev_attrib_is_nonrot.attr, 707 &target_core_dev_attrib_emulate_rest_reord.attr, 708 &target_core_dev_attrib_hw_block_size.attr, 709 &target_core_dev_attrib_block_size.attr, 710 &target_core_dev_attrib_hw_max_sectors.attr, 711 &target_core_dev_attrib_fabric_max_sectors.attr, 712 &target_core_dev_attrib_optimal_sectors.attr, 713 &target_core_dev_attrib_hw_queue_depth.attr, 714 &target_core_dev_attrib_queue_depth.attr, 715 &target_core_dev_attrib_max_unmap_lba_count.attr, 716 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 717 &target_core_dev_attrib_unmap_granularity.attr, 718 &target_core_dev_attrib_unmap_granularity_alignment.attr, 719 &target_core_dev_attrib_max_write_same_len.attr, 720 NULL, 721 }; 722 723 static struct configfs_item_operations target_core_dev_attrib_ops = { 724 .show_attribute = target_core_dev_attrib_attr_show, 725 .store_attribute = target_core_dev_attrib_attr_store, 726 }; 727 728 static struct config_item_type target_core_dev_attrib_cit = { 729 .ct_item_ops = &target_core_dev_attrib_ops, 730 .ct_attrs = target_core_dev_attrib_attrs, 731 .ct_owner = THIS_MODULE, 732 }; 733 734 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 735 736 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 737 738 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 739 #define SE_DEV_WWN_ATTR(_name, _mode) \ 740 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 741 __CONFIGFS_EATTR(_name, _mode, \ 742 target_core_dev_wwn_show_attr_##_name, \ 743 target_core_dev_wwn_store_attr_##_name); 744 745 #define SE_DEV_WWN_ATTR_RO(_name); \ 746 do { \ 747 static struct target_core_dev_wwn_attribute \ 748 target_core_dev_wwn_##_name = \ 749 __CONFIGFS_EATTR_RO(_name, \ 750 target_core_dev_wwn_show_attr_##_name); \ 751 } while (0); 752 753 /* 754 * VPD page 0x80 Unit serial 755 */ 756 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 757 struct t10_wwn *t10_wwn, 758 char *page) 759 { 760 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 761 &t10_wwn->unit_serial[0]); 762 } 763 764 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 765 struct t10_wwn *t10_wwn, 766 const char *page, 767 size_t count) 768 { 769 struct se_device *dev = t10_wwn->t10_dev; 770 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 771 772 /* 773 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 774 * from the struct scsi_device level firmware, do not allow 775 * VPD Unit Serial to be emulated. 776 * 777 * Note this struct scsi_device could also be emulating VPD 778 * information from its drivers/scsi LLD. But for now we assume 779 * it is doing 'the right thing' wrt a world wide unique 780 * VPD Unit Serial Number that OS dependent multipath can depend on. 781 */ 782 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 783 pr_err("Underlying SCSI device firmware provided VPD" 784 " Unit Serial, ignoring request\n"); 785 return -EOPNOTSUPP; 786 } 787 788 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 789 pr_err("Emulated VPD Unit Serial exceeds" 790 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 791 return -EOVERFLOW; 792 } 793 /* 794 * Check to see if any active $FABRIC_MOD exports exist. If they 795 * do exist, fail here as changing this information on the fly 796 * (underneath the initiator side OS dependent multipath code) 797 * could cause negative effects. 798 */ 799 if (dev->export_count) { 800 pr_err("Unable to set VPD Unit Serial while" 801 " active %d $FABRIC_MOD exports exist\n", 802 dev->export_count); 803 return -EINVAL; 804 } 805 806 /* 807 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 808 * 809 * Also, strip any newline added from the userspace 810 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 811 */ 812 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 813 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 814 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 815 "%s", strstrip(buf)); 816 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 817 818 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 819 " %s\n", dev->t10_wwn.unit_serial); 820 821 return count; 822 } 823 824 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 825 826 /* 827 * VPD page 0x83 Protocol Identifier 828 */ 829 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 830 struct t10_wwn *t10_wwn, 831 char *page) 832 { 833 struct t10_vpd *vpd; 834 unsigned char buf[VPD_TMP_BUF_SIZE]; 835 ssize_t len = 0; 836 837 memset(buf, 0, VPD_TMP_BUF_SIZE); 838 839 spin_lock(&t10_wwn->t10_vpd_lock); 840 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 841 if (!vpd->protocol_identifier_set) 842 continue; 843 844 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 845 846 if (len + strlen(buf) >= PAGE_SIZE) 847 break; 848 849 len += sprintf(page+len, "%s", buf); 850 } 851 spin_unlock(&t10_wwn->t10_vpd_lock); 852 853 return len; 854 } 855 856 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 857 struct t10_wwn *t10_wwn, 858 const char *page, 859 size_t count) 860 { 861 return -ENOSYS; 862 } 863 864 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 865 866 /* 867 * Generic wrapper for dumping VPD identifiers by association. 868 */ 869 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 870 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 871 struct t10_wwn *t10_wwn, \ 872 char *page) \ 873 { \ 874 struct t10_vpd *vpd; \ 875 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 876 ssize_t len = 0; \ 877 \ 878 spin_lock(&t10_wwn->t10_vpd_lock); \ 879 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 880 if (vpd->association != _assoc) \ 881 continue; \ 882 \ 883 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 884 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 885 if (len + strlen(buf) >= PAGE_SIZE) \ 886 break; \ 887 len += sprintf(page+len, "%s", buf); \ 888 \ 889 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 890 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 891 if (len + strlen(buf) >= PAGE_SIZE) \ 892 break; \ 893 len += sprintf(page+len, "%s", buf); \ 894 \ 895 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 896 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 897 if (len + strlen(buf) >= PAGE_SIZE) \ 898 break; \ 899 len += sprintf(page+len, "%s", buf); \ 900 } \ 901 spin_unlock(&t10_wwn->t10_vpd_lock); \ 902 \ 903 return len; \ 904 } 905 906 /* 907 * VPD page 0x83 Association: Logical Unit 908 */ 909 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 910 911 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 912 struct t10_wwn *t10_wwn, 913 const char *page, 914 size_t count) 915 { 916 return -ENOSYS; 917 } 918 919 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 920 921 /* 922 * VPD page 0x83 Association: Target Port 923 */ 924 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 925 926 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 927 struct t10_wwn *t10_wwn, 928 const char *page, 929 size_t count) 930 { 931 return -ENOSYS; 932 } 933 934 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 935 936 /* 937 * VPD page 0x83 Association: SCSI Target Device 938 */ 939 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 940 941 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 942 struct t10_wwn *t10_wwn, 943 const char *page, 944 size_t count) 945 { 946 return -ENOSYS; 947 } 948 949 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 950 951 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 952 953 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 954 &target_core_dev_wwn_vpd_unit_serial.attr, 955 &target_core_dev_wwn_vpd_protocol_identifier.attr, 956 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 957 &target_core_dev_wwn_vpd_assoc_target_port.attr, 958 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 959 NULL, 960 }; 961 962 static struct configfs_item_operations target_core_dev_wwn_ops = { 963 .show_attribute = target_core_dev_wwn_attr_show, 964 .store_attribute = target_core_dev_wwn_attr_store, 965 }; 966 967 static struct config_item_type target_core_dev_wwn_cit = { 968 .ct_item_ops = &target_core_dev_wwn_ops, 969 .ct_attrs = target_core_dev_wwn_attrs, 970 .ct_owner = THIS_MODULE, 971 }; 972 973 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 974 975 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 976 977 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 978 #define SE_DEV_PR_ATTR(_name, _mode) \ 979 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 980 __CONFIGFS_EATTR(_name, _mode, \ 981 target_core_dev_pr_show_attr_##_name, \ 982 target_core_dev_pr_store_attr_##_name); 983 984 #define SE_DEV_PR_ATTR_RO(_name); \ 985 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 986 __CONFIGFS_EATTR_RO(_name, \ 987 target_core_dev_pr_show_attr_##_name); 988 989 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 990 char *page) 991 { 992 struct se_node_acl *se_nacl; 993 struct t10_pr_registration *pr_reg; 994 char i_buf[PR_REG_ISID_ID_LEN]; 995 996 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 997 998 pr_reg = dev->dev_pr_res_holder; 999 if (!pr_reg) 1000 return sprintf(page, "No SPC-3 Reservation holder\n"); 1001 1002 se_nacl = pr_reg->pr_reg_nacl; 1003 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1004 1005 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1006 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1007 se_nacl->initiatorname, i_buf); 1008 } 1009 1010 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1011 char *page) 1012 { 1013 struct se_node_acl *se_nacl; 1014 ssize_t len; 1015 1016 se_nacl = dev->dev_reserved_node_acl; 1017 if (se_nacl) { 1018 len = sprintf(page, 1019 "SPC-2 Reservation: %s Initiator: %s\n", 1020 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1021 se_nacl->initiatorname); 1022 } else { 1023 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1024 } 1025 return len; 1026 } 1027 1028 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 1029 char *page) 1030 { 1031 int ret; 1032 1033 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1034 return sprintf(page, "Passthrough\n"); 1035 1036 spin_lock(&dev->dev_reservation_lock); 1037 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1038 ret = target_core_dev_pr_show_spc2_res(dev, page); 1039 else 1040 ret = target_core_dev_pr_show_spc3_res(dev, page); 1041 spin_unlock(&dev->dev_reservation_lock); 1042 return ret; 1043 } 1044 1045 SE_DEV_PR_ATTR_RO(res_holder); 1046 1047 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1048 struct se_device *dev, char *page) 1049 { 1050 ssize_t len = 0; 1051 1052 spin_lock(&dev->dev_reservation_lock); 1053 if (!dev->dev_pr_res_holder) { 1054 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1055 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1056 len = sprintf(page, "SPC-3 Reservation: All Target" 1057 " Ports registration\n"); 1058 } else { 1059 len = sprintf(page, "SPC-3 Reservation: Single" 1060 " Target Port registration\n"); 1061 } 1062 1063 spin_unlock(&dev->dev_reservation_lock); 1064 return len; 1065 } 1066 1067 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1068 1069 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1070 struct se_device *dev, char *page) 1071 { 1072 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 1073 } 1074 1075 SE_DEV_PR_ATTR_RO(res_pr_generation); 1076 1077 /* 1078 * res_pr_holder_tg_port 1079 */ 1080 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1081 struct se_device *dev, char *page) 1082 { 1083 struct se_node_acl *se_nacl; 1084 struct se_lun *lun; 1085 struct se_portal_group *se_tpg; 1086 struct t10_pr_registration *pr_reg; 1087 struct target_core_fabric_ops *tfo; 1088 ssize_t len = 0; 1089 1090 spin_lock(&dev->dev_reservation_lock); 1091 pr_reg = dev->dev_pr_res_holder; 1092 if (!pr_reg) { 1093 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1094 goto out_unlock; 1095 } 1096 1097 se_nacl = pr_reg->pr_reg_nacl; 1098 se_tpg = se_nacl->se_tpg; 1099 lun = pr_reg->pr_reg_tg_pt_lun; 1100 tfo = se_tpg->se_tpg_tfo; 1101 1102 len += sprintf(page+len, "SPC-3 Reservation: %s" 1103 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1104 tfo->tpg_get_wwn(se_tpg)); 1105 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1106 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1107 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1108 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1109 tfo->get_fabric_name(), lun->unpacked_lun); 1110 1111 out_unlock: 1112 spin_unlock(&dev->dev_reservation_lock); 1113 return len; 1114 } 1115 1116 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1117 1118 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1119 struct se_device *dev, char *page) 1120 { 1121 struct target_core_fabric_ops *tfo; 1122 struct t10_pr_registration *pr_reg; 1123 unsigned char buf[384]; 1124 char i_buf[PR_REG_ISID_ID_LEN]; 1125 ssize_t len = 0; 1126 int reg_count = 0; 1127 1128 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1129 1130 spin_lock(&dev->t10_pr.registration_lock); 1131 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1132 pr_reg_list) { 1133 1134 memset(buf, 0, 384); 1135 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1136 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1137 core_pr_dump_initiator_port(pr_reg, i_buf, 1138 PR_REG_ISID_ID_LEN); 1139 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1140 tfo->get_fabric_name(), 1141 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1142 pr_reg->pr_res_generation); 1143 1144 if (len + strlen(buf) >= PAGE_SIZE) 1145 break; 1146 1147 len += sprintf(page+len, "%s", buf); 1148 reg_count++; 1149 } 1150 spin_unlock(&dev->t10_pr.registration_lock); 1151 1152 if (!reg_count) 1153 len += sprintf(page+len, "None\n"); 1154 1155 return len; 1156 } 1157 1158 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1159 1160 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1161 struct se_device *dev, char *page) 1162 { 1163 struct t10_pr_registration *pr_reg; 1164 ssize_t len = 0; 1165 1166 spin_lock(&dev->dev_reservation_lock); 1167 pr_reg = dev->dev_pr_res_holder; 1168 if (pr_reg) { 1169 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1170 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1171 } else { 1172 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1173 } 1174 1175 spin_unlock(&dev->dev_reservation_lock); 1176 return len; 1177 } 1178 1179 SE_DEV_PR_ATTR_RO(res_pr_type); 1180 1181 static ssize_t target_core_dev_pr_show_attr_res_type( 1182 struct se_device *dev, char *page) 1183 { 1184 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1185 return sprintf(page, "SPC_PASSTHROUGH\n"); 1186 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1187 return sprintf(page, "SPC2_RESERVATIONS\n"); 1188 else 1189 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1190 } 1191 1192 SE_DEV_PR_ATTR_RO(res_type); 1193 1194 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1195 struct se_device *dev, char *page) 1196 { 1197 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1198 return 0; 1199 1200 return sprintf(page, "APTPL Bit Status: %s\n", 1201 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1202 } 1203 1204 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1205 1206 /* 1207 * res_aptpl_metadata 1208 */ 1209 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1210 struct se_device *dev, char *page) 1211 { 1212 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1213 return 0; 1214 1215 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1216 } 1217 1218 enum { 1219 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1220 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1221 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1222 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1223 }; 1224 1225 static match_table_t tokens = { 1226 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1227 {Opt_initiator_node, "initiator_node=%s"}, 1228 {Opt_initiator_sid, "initiator_sid=%s"}, 1229 {Opt_sa_res_key, "sa_res_key=%s"}, 1230 {Opt_res_holder, "res_holder=%d"}, 1231 {Opt_res_type, "res_type=%d"}, 1232 {Opt_res_scope, "res_scope=%d"}, 1233 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1234 {Opt_mapped_lun, "mapped_lun=%d"}, 1235 {Opt_target_fabric, "target_fabric=%s"}, 1236 {Opt_target_node, "target_node=%s"}, 1237 {Opt_tpgt, "tpgt=%d"}, 1238 {Opt_port_rtpi, "port_rtpi=%d"}, 1239 {Opt_target_lun, "target_lun=%d"}, 1240 {Opt_err, NULL} 1241 }; 1242 1243 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1244 struct se_device *dev, 1245 const char *page, 1246 size_t count) 1247 { 1248 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1249 unsigned char *t_fabric = NULL, *t_port = NULL; 1250 char *orig, *ptr, *arg_p, *opts; 1251 substring_t args[MAX_OPT_ARGS]; 1252 unsigned long long tmp_ll; 1253 u64 sa_res_key = 0; 1254 u32 mapped_lun = 0, target_lun = 0; 1255 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1256 u16 port_rpti = 0, tpgt = 0; 1257 u8 type = 0, scope; 1258 1259 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1260 return 0; 1261 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1262 return 0; 1263 1264 if (dev->export_count) { 1265 pr_debug("Unable to process APTPL metadata while" 1266 " active fabric exports exist\n"); 1267 return -EINVAL; 1268 } 1269 1270 opts = kstrdup(page, GFP_KERNEL); 1271 if (!opts) 1272 return -ENOMEM; 1273 1274 orig = opts; 1275 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1276 if (!*ptr) 1277 continue; 1278 1279 token = match_token(ptr, tokens, args); 1280 switch (token) { 1281 case Opt_initiator_fabric: 1282 i_fabric = match_strdup(&args[0]); 1283 if (!i_fabric) { 1284 ret = -ENOMEM; 1285 goto out; 1286 } 1287 break; 1288 case Opt_initiator_node: 1289 i_port = match_strdup(&args[0]); 1290 if (!i_port) { 1291 ret = -ENOMEM; 1292 goto out; 1293 } 1294 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1295 pr_err("APTPL metadata initiator_node=" 1296 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1297 PR_APTPL_MAX_IPORT_LEN); 1298 ret = -EINVAL; 1299 break; 1300 } 1301 break; 1302 case Opt_initiator_sid: 1303 isid = match_strdup(&args[0]); 1304 if (!isid) { 1305 ret = -ENOMEM; 1306 goto out; 1307 } 1308 if (strlen(isid) >= PR_REG_ISID_LEN) { 1309 pr_err("APTPL metadata initiator_isid" 1310 "= exceeds PR_REG_ISID_LEN: %d\n", 1311 PR_REG_ISID_LEN); 1312 ret = -EINVAL; 1313 break; 1314 } 1315 break; 1316 case Opt_sa_res_key: 1317 arg_p = match_strdup(&args[0]); 1318 if (!arg_p) { 1319 ret = -ENOMEM; 1320 goto out; 1321 } 1322 ret = kstrtoull(arg_p, 0, &tmp_ll); 1323 if (ret < 0) { 1324 pr_err("kstrtoull() failed for" 1325 " sa_res_key=\n"); 1326 goto out; 1327 } 1328 sa_res_key = (u64)tmp_ll; 1329 break; 1330 /* 1331 * PR APTPL Metadata for Reservation 1332 */ 1333 case Opt_res_holder: 1334 match_int(args, &arg); 1335 res_holder = arg; 1336 break; 1337 case Opt_res_type: 1338 match_int(args, &arg); 1339 type = (u8)arg; 1340 break; 1341 case Opt_res_scope: 1342 match_int(args, &arg); 1343 scope = (u8)arg; 1344 break; 1345 case Opt_res_all_tg_pt: 1346 match_int(args, &arg); 1347 all_tg_pt = (int)arg; 1348 break; 1349 case Opt_mapped_lun: 1350 match_int(args, &arg); 1351 mapped_lun = (u32)arg; 1352 break; 1353 /* 1354 * PR APTPL Metadata for Target Port 1355 */ 1356 case Opt_target_fabric: 1357 t_fabric = match_strdup(&args[0]); 1358 if (!t_fabric) { 1359 ret = -ENOMEM; 1360 goto out; 1361 } 1362 break; 1363 case Opt_target_node: 1364 t_port = match_strdup(&args[0]); 1365 if (!t_port) { 1366 ret = -ENOMEM; 1367 goto out; 1368 } 1369 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1370 pr_err("APTPL metadata target_node=" 1371 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1372 PR_APTPL_MAX_TPORT_LEN); 1373 ret = -EINVAL; 1374 break; 1375 } 1376 break; 1377 case Opt_tpgt: 1378 match_int(args, &arg); 1379 tpgt = (u16)arg; 1380 break; 1381 case Opt_port_rtpi: 1382 match_int(args, &arg); 1383 port_rpti = (u16)arg; 1384 break; 1385 case Opt_target_lun: 1386 match_int(args, &arg); 1387 target_lun = (u32)arg; 1388 break; 1389 default: 1390 break; 1391 } 1392 } 1393 1394 if (!i_port || !t_port || !sa_res_key) { 1395 pr_err("Illegal parameters for APTPL registration\n"); 1396 ret = -EINVAL; 1397 goto out; 1398 } 1399 1400 if (res_holder && !(type)) { 1401 pr_err("Illegal PR type: 0x%02x for reservation" 1402 " holder\n", type); 1403 ret = -EINVAL; 1404 goto out; 1405 } 1406 1407 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1408 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1409 res_holder, all_tg_pt, type); 1410 out: 1411 kfree(i_fabric); 1412 kfree(i_port); 1413 kfree(isid); 1414 kfree(t_fabric); 1415 kfree(t_port); 1416 kfree(orig); 1417 return (ret == 0) ? count : ret; 1418 } 1419 1420 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1421 1422 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1423 1424 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1425 &target_core_dev_pr_res_holder.attr, 1426 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1427 &target_core_dev_pr_res_pr_generation.attr, 1428 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1429 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1430 &target_core_dev_pr_res_pr_type.attr, 1431 &target_core_dev_pr_res_type.attr, 1432 &target_core_dev_pr_res_aptpl_active.attr, 1433 &target_core_dev_pr_res_aptpl_metadata.attr, 1434 NULL, 1435 }; 1436 1437 static struct configfs_item_operations target_core_dev_pr_ops = { 1438 .show_attribute = target_core_dev_pr_attr_show, 1439 .store_attribute = target_core_dev_pr_attr_store, 1440 }; 1441 1442 static struct config_item_type target_core_dev_pr_cit = { 1443 .ct_item_ops = &target_core_dev_pr_ops, 1444 .ct_attrs = target_core_dev_pr_attrs, 1445 .ct_owner = THIS_MODULE, 1446 }; 1447 1448 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1449 1450 /* Start functions for struct config_item_type target_core_dev_cit */ 1451 1452 static ssize_t target_core_show_dev_info(void *p, char *page) 1453 { 1454 struct se_device *dev = p; 1455 struct se_subsystem_api *t = dev->transport; 1456 int bl = 0; 1457 ssize_t read_bytes = 0; 1458 1459 transport_dump_dev_state(dev, page, &bl); 1460 read_bytes += bl; 1461 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes); 1462 return read_bytes; 1463 } 1464 1465 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1466 .attr = { .ca_owner = THIS_MODULE, 1467 .ca_name = "info", 1468 .ca_mode = S_IRUGO }, 1469 .show = target_core_show_dev_info, 1470 .store = NULL, 1471 }; 1472 1473 static ssize_t target_core_store_dev_control( 1474 void *p, 1475 const char *page, 1476 size_t count) 1477 { 1478 struct se_device *dev = p; 1479 struct se_subsystem_api *t = dev->transport; 1480 1481 return t->set_configfs_dev_params(dev, page, count); 1482 } 1483 1484 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1485 .attr = { .ca_owner = THIS_MODULE, 1486 .ca_name = "control", 1487 .ca_mode = S_IWUSR }, 1488 .show = NULL, 1489 .store = target_core_store_dev_control, 1490 }; 1491 1492 static ssize_t target_core_show_dev_alias(void *p, char *page) 1493 { 1494 struct se_device *dev = p; 1495 1496 if (!(dev->dev_flags & DF_USING_ALIAS)) 1497 return 0; 1498 1499 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1500 } 1501 1502 static ssize_t target_core_store_dev_alias( 1503 void *p, 1504 const char *page, 1505 size_t count) 1506 { 1507 struct se_device *dev = p; 1508 struct se_hba *hba = dev->se_hba; 1509 ssize_t read_bytes; 1510 1511 if (count > (SE_DEV_ALIAS_LEN-1)) { 1512 pr_err("alias count: %d exceeds" 1513 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1514 SE_DEV_ALIAS_LEN-1); 1515 return -EINVAL; 1516 } 1517 1518 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1519 if (!read_bytes) 1520 return -EINVAL; 1521 if (dev->dev_alias[read_bytes - 1] == '\n') 1522 dev->dev_alias[read_bytes - 1] = '\0'; 1523 1524 dev->dev_flags |= DF_USING_ALIAS; 1525 1526 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1527 config_item_name(&hba->hba_group.cg_item), 1528 config_item_name(&dev->dev_group.cg_item), 1529 dev->dev_alias); 1530 1531 return read_bytes; 1532 } 1533 1534 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1535 .attr = { .ca_owner = THIS_MODULE, 1536 .ca_name = "alias", 1537 .ca_mode = S_IRUGO | S_IWUSR }, 1538 .show = target_core_show_dev_alias, 1539 .store = target_core_store_dev_alias, 1540 }; 1541 1542 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1543 { 1544 struct se_device *dev = p; 1545 1546 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1547 return 0; 1548 1549 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1550 } 1551 1552 static ssize_t target_core_store_dev_udev_path( 1553 void *p, 1554 const char *page, 1555 size_t count) 1556 { 1557 struct se_device *dev = p; 1558 struct se_hba *hba = dev->se_hba; 1559 ssize_t read_bytes; 1560 1561 if (count > (SE_UDEV_PATH_LEN-1)) { 1562 pr_err("udev_path count: %d exceeds" 1563 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1564 SE_UDEV_PATH_LEN-1); 1565 return -EINVAL; 1566 } 1567 1568 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1569 "%s", page); 1570 if (!read_bytes) 1571 return -EINVAL; 1572 if (dev->udev_path[read_bytes - 1] == '\n') 1573 dev->udev_path[read_bytes - 1] = '\0'; 1574 1575 dev->dev_flags |= DF_USING_UDEV_PATH; 1576 1577 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1578 config_item_name(&hba->hba_group.cg_item), 1579 config_item_name(&dev->dev_group.cg_item), 1580 dev->udev_path); 1581 1582 return read_bytes; 1583 } 1584 1585 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1586 .attr = { .ca_owner = THIS_MODULE, 1587 .ca_name = "udev_path", 1588 .ca_mode = S_IRUGO | S_IWUSR }, 1589 .show = target_core_show_dev_udev_path, 1590 .store = target_core_store_dev_udev_path, 1591 }; 1592 1593 static ssize_t target_core_show_dev_enable(void *p, char *page) 1594 { 1595 struct se_device *dev = p; 1596 1597 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1598 } 1599 1600 static ssize_t target_core_store_dev_enable( 1601 void *p, 1602 const char *page, 1603 size_t count) 1604 { 1605 struct se_device *dev = p; 1606 char *ptr; 1607 int ret; 1608 1609 ptr = strstr(page, "1"); 1610 if (!ptr) { 1611 pr_err("For dev_enable ops, only valid value" 1612 " is \"1\"\n"); 1613 return -EINVAL; 1614 } 1615 1616 ret = target_configure_device(dev); 1617 if (ret) 1618 return ret; 1619 return count; 1620 } 1621 1622 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1623 .attr = { .ca_owner = THIS_MODULE, 1624 .ca_name = "enable", 1625 .ca_mode = S_IRUGO | S_IWUSR }, 1626 .show = target_core_show_dev_enable, 1627 .store = target_core_store_dev_enable, 1628 }; 1629 1630 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1631 { 1632 struct se_device *dev = p; 1633 struct config_item *lu_ci; 1634 struct t10_alua_lu_gp *lu_gp; 1635 struct t10_alua_lu_gp_member *lu_gp_mem; 1636 ssize_t len = 0; 1637 1638 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1639 if (!lu_gp_mem) 1640 return 0; 1641 1642 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1643 lu_gp = lu_gp_mem->lu_gp; 1644 if (lu_gp) { 1645 lu_ci = &lu_gp->lu_gp_group.cg_item; 1646 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1647 config_item_name(lu_ci), lu_gp->lu_gp_id); 1648 } 1649 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1650 1651 return len; 1652 } 1653 1654 static ssize_t target_core_store_alua_lu_gp( 1655 void *p, 1656 const char *page, 1657 size_t count) 1658 { 1659 struct se_device *dev = p; 1660 struct se_hba *hba = dev->se_hba; 1661 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1662 struct t10_alua_lu_gp_member *lu_gp_mem; 1663 unsigned char buf[LU_GROUP_NAME_BUF]; 1664 int move = 0; 1665 1666 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1667 if (!lu_gp_mem) 1668 return 0; 1669 1670 if (count > LU_GROUP_NAME_BUF) { 1671 pr_err("ALUA LU Group Alias too large!\n"); 1672 return -EINVAL; 1673 } 1674 memset(buf, 0, LU_GROUP_NAME_BUF); 1675 memcpy(buf, page, count); 1676 /* 1677 * Any ALUA logical unit alias besides "NULL" means we will be 1678 * making a new group association. 1679 */ 1680 if (strcmp(strstrip(buf), "NULL")) { 1681 /* 1682 * core_alua_get_lu_gp_by_name() will increment reference to 1683 * struct t10_alua_lu_gp. This reference is released with 1684 * core_alua_get_lu_gp_by_name below(). 1685 */ 1686 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1687 if (!lu_gp_new) 1688 return -ENODEV; 1689 } 1690 1691 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1692 lu_gp = lu_gp_mem->lu_gp; 1693 if (lu_gp) { 1694 /* 1695 * Clearing an existing lu_gp association, and replacing 1696 * with NULL 1697 */ 1698 if (!lu_gp_new) { 1699 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1700 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1701 " %hu\n", 1702 config_item_name(&hba->hba_group.cg_item), 1703 config_item_name(&dev->dev_group.cg_item), 1704 config_item_name(&lu_gp->lu_gp_group.cg_item), 1705 lu_gp->lu_gp_id); 1706 1707 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1708 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1709 1710 return count; 1711 } 1712 /* 1713 * Removing existing association of lu_gp_mem with lu_gp 1714 */ 1715 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1716 move = 1; 1717 } 1718 /* 1719 * Associate lu_gp_mem with lu_gp_new. 1720 */ 1721 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1722 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1723 1724 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1725 " core/alua/lu_gps/%s, ID: %hu\n", 1726 (move) ? "Moving" : "Adding", 1727 config_item_name(&hba->hba_group.cg_item), 1728 config_item_name(&dev->dev_group.cg_item), 1729 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1730 lu_gp_new->lu_gp_id); 1731 1732 core_alua_put_lu_gp_from_name(lu_gp_new); 1733 return count; 1734 } 1735 1736 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1737 .attr = { .ca_owner = THIS_MODULE, 1738 .ca_name = "alua_lu_gp", 1739 .ca_mode = S_IRUGO | S_IWUSR }, 1740 .show = target_core_show_alua_lu_gp, 1741 .store = target_core_store_alua_lu_gp, 1742 }; 1743 1744 static struct configfs_attribute *lio_core_dev_attrs[] = { 1745 &target_core_attr_dev_info.attr, 1746 &target_core_attr_dev_control.attr, 1747 &target_core_attr_dev_alias.attr, 1748 &target_core_attr_dev_udev_path.attr, 1749 &target_core_attr_dev_enable.attr, 1750 &target_core_attr_dev_alua_lu_gp.attr, 1751 NULL, 1752 }; 1753 1754 static void target_core_dev_release(struct config_item *item) 1755 { 1756 struct config_group *dev_cg = to_config_group(item); 1757 struct se_device *dev = 1758 container_of(dev_cg, struct se_device, dev_group); 1759 1760 kfree(dev_cg->default_groups); 1761 target_free_device(dev); 1762 } 1763 1764 static ssize_t target_core_dev_show(struct config_item *item, 1765 struct configfs_attribute *attr, 1766 char *page) 1767 { 1768 struct config_group *dev_cg = to_config_group(item); 1769 struct se_device *dev = 1770 container_of(dev_cg, struct se_device, dev_group); 1771 struct target_core_configfs_attribute *tc_attr = container_of( 1772 attr, struct target_core_configfs_attribute, attr); 1773 1774 if (!tc_attr->show) 1775 return -EINVAL; 1776 1777 return tc_attr->show(dev, page); 1778 } 1779 1780 static ssize_t target_core_dev_store(struct config_item *item, 1781 struct configfs_attribute *attr, 1782 const char *page, size_t count) 1783 { 1784 struct config_group *dev_cg = to_config_group(item); 1785 struct se_device *dev = 1786 container_of(dev_cg, struct se_device, dev_group); 1787 struct target_core_configfs_attribute *tc_attr = container_of( 1788 attr, struct target_core_configfs_attribute, attr); 1789 1790 if (!tc_attr->store) 1791 return -EINVAL; 1792 1793 return tc_attr->store(dev, page, count); 1794 } 1795 1796 static struct configfs_item_operations target_core_dev_item_ops = { 1797 .release = target_core_dev_release, 1798 .show_attribute = target_core_dev_show, 1799 .store_attribute = target_core_dev_store, 1800 }; 1801 1802 static struct config_item_type target_core_dev_cit = { 1803 .ct_item_ops = &target_core_dev_item_ops, 1804 .ct_attrs = lio_core_dev_attrs, 1805 .ct_owner = THIS_MODULE, 1806 }; 1807 1808 /* End functions for struct config_item_type target_core_dev_cit */ 1809 1810 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 1811 1812 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 1813 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 1814 static struct target_core_alua_lu_gp_attribute \ 1815 target_core_alua_lu_gp_##_name = \ 1816 __CONFIGFS_EATTR(_name, _mode, \ 1817 target_core_alua_lu_gp_show_attr_##_name, \ 1818 target_core_alua_lu_gp_store_attr_##_name); 1819 1820 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 1821 static struct target_core_alua_lu_gp_attribute \ 1822 target_core_alua_lu_gp_##_name = \ 1823 __CONFIGFS_EATTR_RO(_name, \ 1824 target_core_alua_lu_gp_show_attr_##_name); 1825 1826 /* 1827 * lu_gp_id 1828 */ 1829 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 1830 struct t10_alua_lu_gp *lu_gp, 1831 char *page) 1832 { 1833 if (!lu_gp->lu_gp_valid_id) 1834 return 0; 1835 1836 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 1837 } 1838 1839 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 1840 struct t10_alua_lu_gp *lu_gp, 1841 const char *page, 1842 size_t count) 1843 { 1844 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 1845 unsigned long lu_gp_id; 1846 int ret; 1847 1848 ret = kstrtoul(page, 0, &lu_gp_id); 1849 if (ret < 0) { 1850 pr_err("kstrtoul() returned %d for" 1851 " lu_gp_id\n", ret); 1852 return ret; 1853 } 1854 if (lu_gp_id > 0x0000ffff) { 1855 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 1856 " 0x0000ffff\n", lu_gp_id); 1857 return -EINVAL; 1858 } 1859 1860 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 1861 if (ret < 0) 1862 return -EINVAL; 1863 1864 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 1865 " Group: core/alua/lu_gps/%s to ID: %hu\n", 1866 config_item_name(&alua_lu_gp_cg->cg_item), 1867 lu_gp->lu_gp_id); 1868 1869 return count; 1870 } 1871 1872 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 1873 1874 /* 1875 * members 1876 */ 1877 static ssize_t target_core_alua_lu_gp_show_attr_members( 1878 struct t10_alua_lu_gp *lu_gp, 1879 char *page) 1880 { 1881 struct se_device *dev; 1882 struct se_hba *hba; 1883 struct t10_alua_lu_gp_member *lu_gp_mem; 1884 ssize_t len = 0, cur_len; 1885 unsigned char buf[LU_GROUP_NAME_BUF]; 1886 1887 memset(buf, 0, LU_GROUP_NAME_BUF); 1888 1889 spin_lock(&lu_gp->lu_gp_lock); 1890 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 1891 dev = lu_gp_mem->lu_gp_mem_dev; 1892 hba = dev->se_hba; 1893 1894 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 1895 config_item_name(&hba->hba_group.cg_item), 1896 config_item_name(&dev->dev_group.cg_item)); 1897 cur_len++; /* Extra byte for NULL terminator */ 1898 1899 if ((cur_len + len) > PAGE_SIZE) { 1900 pr_warn("Ran out of lu_gp_show_attr" 1901 "_members buffer\n"); 1902 break; 1903 } 1904 memcpy(page+len, buf, cur_len); 1905 len += cur_len; 1906 } 1907 spin_unlock(&lu_gp->lu_gp_lock); 1908 1909 return len; 1910 } 1911 1912 SE_DEV_ALUA_LU_ATTR_RO(members); 1913 1914 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 1915 1916 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 1917 &target_core_alua_lu_gp_lu_gp_id.attr, 1918 &target_core_alua_lu_gp_members.attr, 1919 NULL, 1920 }; 1921 1922 static void target_core_alua_lu_gp_release(struct config_item *item) 1923 { 1924 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1925 struct t10_alua_lu_gp, lu_gp_group); 1926 1927 core_alua_free_lu_gp(lu_gp); 1928 } 1929 1930 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 1931 .release = target_core_alua_lu_gp_release, 1932 .show_attribute = target_core_alua_lu_gp_attr_show, 1933 .store_attribute = target_core_alua_lu_gp_attr_store, 1934 }; 1935 1936 static struct config_item_type target_core_alua_lu_gp_cit = { 1937 .ct_item_ops = &target_core_alua_lu_gp_ops, 1938 .ct_attrs = target_core_alua_lu_gp_attrs, 1939 .ct_owner = THIS_MODULE, 1940 }; 1941 1942 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 1943 1944 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 1945 1946 static struct config_group *target_core_alua_create_lu_gp( 1947 struct config_group *group, 1948 const char *name) 1949 { 1950 struct t10_alua_lu_gp *lu_gp; 1951 struct config_group *alua_lu_gp_cg = NULL; 1952 struct config_item *alua_lu_gp_ci = NULL; 1953 1954 lu_gp = core_alua_allocate_lu_gp(name, 0); 1955 if (IS_ERR(lu_gp)) 1956 return NULL; 1957 1958 alua_lu_gp_cg = &lu_gp->lu_gp_group; 1959 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 1960 1961 config_group_init_type_name(alua_lu_gp_cg, name, 1962 &target_core_alua_lu_gp_cit); 1963 1964 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 1965 " Group: core/alua/lu_gps/%s\n", 1966 config_item_name(alua_lu_gp_ci)); 1967 1968 return alua_lu_gp_cg; 1969 1970 } 1971 1972 static void target_core_alua_drop_lu_gp( 1973 struct config_group *group, 1974 struct config_item *item) 1975 { 1976 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1977 struct t10_alua_lu_gp, lu_gp_group); 1978 1979 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 1980 " Group: core/alua/lu_gps/%s, ID: %hu\n", 1981 config_item_name(item), lu_gp->lu_gp_id); 1982 /* 1983 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 1984 * -> target_core_alua_lu_gp_release() 1985 */ 1986 config_item_put(item); 1987 } 1988 1989 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 1990 .make_group = &target_core_alua_create_lu_gp, 1991 .drop_item = &target_core_alua_drop_lu_gp, 1992 }; 1993 1994 static struct config_item_type target_core_alua_lu_gps_cit = { 1995 .ct_item_ops = NULL, 1996 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 1997 .ct_owner = THIS_MODULE, 1998 }; 1999 2000 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2001 2002 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2003 2004 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2005 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2006 static struct target_core_alua_tg_pt_gp_attribute \ 2007 target_core_alua_tg_pt_gp_##_name = \ 2008 __CONFIGFS_EATTR(_name, _mode, \ 2009 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2010 target_core_alua_tg_pt_gp_store_attr_##_name); 2011 2012 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2013 static struct target_core_alua_tg_pt_gp_attribute \ 2014 target_core_alua_tg_pt_gp_##_name = \ 2015 __CONFIGFS_EATTR_RO(_name, \ 2016 target_core_alua_tg_pt_gp_show_attr_##_name); 2017 2018 /* 2019 * alua_access_state 2020 */ 2021 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2022 struct t10_alua_tg_pt_gp *tg_pt_gp, 2023 char *page) 2024 { 2025 return sprintf(page, "%d\n", 2026 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2027 } 2028 2029 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2030 struct t10_alua_tg_pt_gp *tg_pt_gp, 2031 const char *page, 2032 size_t count) 2033 { 2034 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2035 unsigned long tmp; 2036 int new_state, ret; 2037 2038 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2039 pr_err("Unable to do implicit ALUA on non valid" 2040 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2041 return -EINVAL; 2042 } 2043 2044 ret = kstrtoul(page, 0, &tmp); 2045 if (ret < 0) { 2046 pr_err("Unable to extract new ALUA access state from" 2047 " %s\n", page); 2048 return ret; 2049 } 2050 new_state = (int)tmp; 2051 2052 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2053 pr_err("Unable to process implicit configfs ALUA" 2054 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2055 return -EINVAL; 2056 } 2057 2058 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2059 NULL, NULL, new_state, 0); 2060 return (!ret) ? count : -EINVAL; 2061 } 2062 2063 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2064 2065 /* 2066 * alua_access_status 2067 */ 2068 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2069 struct t10_alua_tg_pt_gp *tg_pt_gp, 2070 char *page) 2071 { 2072 return sprintf(page, "%s\n", 2073 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2074 } 2075 2076 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2077 struct t10_alua_tg_pt_gp *tg_pt_gp, 2078 const char *page, 2079 size_t count) 2080 { 2081 unsigned long tmp; 2082 int new_status, ret; 2083 2084 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2085 pr_err("Unable to do set ALUA access status on non" 2086 " valid tg_pt_gp ID: %hu\n", 2087 tg_pt_gp->tg_pt_gp_valid_id); 2088 return -EINVAL; 2089 } 2090 2091 ret = kstrtoul(page, 0, &tmp); 2092 if (ret < 0) { 2093 pr_err("Unable to extract new ALUA access status" 2094 " from %s\n", page); 2095 return ret; 2096 } 2097 new_status = (int)tmp; 2098 2099 if ((new_status != ALUA_STATUS_NONE) && 2100 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2101 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2102 pr_err("Illegal ALUA access status: 0x%02x\n", 2103 new_status); 2104 return -EINVAL; 2105 } 2106 2107 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2108 return count; 2109 } 2110 2111 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2112 2113 /* 2114 * alua_access_type 2115 */ 2116 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2117 struct t10_alua_tg_pt_gp *tg_pt_gp, 2118 char *page) 2119 { 2120 return core_alua_show_access_type(tg_pt_gp, page); 2121 } 2122 2123 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2124 struct t10_alua_tg_pt_gp *tg_pt_gp, 2125 const char *page, 2126 size_t count) 2127 { 2128 return core_alua_store_access_type(tg_pt_gp, page, count); 2129 } 2130 2131 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2132 2133 /* 2134 * alua_supported_states 2135 */ 2136 2137 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \ 2138 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \ 2139 struct t10_alua_tg_pt_gp *t, char *p) \ 2140 { \ 2141 return sprintf(p, "%d\n", !!(t->_var & _bit)); \ 2142 } 2143 2144 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \ 2145 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\ 2146 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \ 2147 { \ 2148 unsigned long tmp; \ 2149 int ret; \ 2150 \ 2151 if (!t->tg_pt_gp_valid_id) { \ 2152 pr_err("Unable to do set ##_name ALUA state on non" \ 2153 " valid tg_pt_gp ID: %hu\n", \ 2154 t->tg_pt_gp_valid_id); \ 2155 return -EINVAL; \ 2156 } \ 2157 \ 2158 ret = kstrtoul(p, 0, &tmp); \ 2159 if (ret < 0) { \ 2160 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2161 return -EINVAL; \ 2162 } \ 2163 if (tmp > 1) { \ 2164 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2165 return -EINVAL; \ 2166 } \ 2167 if (!tmp) \ 2168 t->_var |= _bit; \ 2169 else \ 2170 t->_var &= ~_bit; \ 2171 \ 2172 return c; \ 2173 } 2174 2175 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning, 2176 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2177 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning, 2178 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2179 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR); 2180 2181 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline, 2182 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2183 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline, 2184 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2185 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR); 2186 2187 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent, 2188 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2189 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent, 2190 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2191 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO | S_IWUSR); 2192 2193 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable, 2194 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2195 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable, 2196 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2197 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR); 2198 2199 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby, 2200 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2201 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby, 2202 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2203 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR); 2204 2205 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized, 2206 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2207 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized, 2208 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2209 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR); 2210 2211 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized, 2212 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2213 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized, 2214 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2215 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR); 2216 2217 /* 2218 * alua_write_metadata 2219 */ 2220 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2221 struct t10_alua_tg_pt_gp *tg_pt_gp, 2222 char *page) 2223 { 2224 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2225 } 2226 2227 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2228 struct t10_alua_tg_pt_gp *tg_pt_gp, 2229 const char *page, 2230 size_t count) 2231 { 2232 unsigned long tmp; 2233 int ret; 2234 2235 ret = kstrtoul(page, 0, &tmp); 2236 if (ret < 0) { 2237 pr_err("Unable to extract alua_write_metadata\n"); 2238 return ret; 2239 } 2240 2241 if ((tmp != 0) && (tmp != 1)) { 2242 pr_err("Illegal value for alua_write_metadata:" 2243 " %lu\n", tmp); 2244 return -EINVAL; 2245 } 2246 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2247 2248 return count; 2249 } 2250 2251 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2252 2253 2254 2255 /* 2256 * nonop_delay_msecs 2257 */ 2258 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2259 struct t10_alua_tg_pt_gp *tg_pt_gp, 2260 char *page) 2261 { 2262 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2263 2264 } 2265 2266 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2267 struct t10_alua_tg_pt_gp *tg_pt_gp, 2268 const char *page, 2269 size_t count) 2270 { 2271 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2272 } 2273 2274 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2275 2276 /* 2277 * trans_delay_msecs 2278 */ 2279 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2280 struct t10_alua_tg_pt_gp *tg_pt_gp, 2281 char *page) 2282 { 2283 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2284 } 2285 2286 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2287 struct t10_alua_tg_pt_gp *tg_pt_gp, 2288 const char *page, 2289 size_t count) 2290 { 2291 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2292 } 2293 2294 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2295 2296 /* 2297 * implicit_trans_secs 2298 */ 2299 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs( 2300 struct t10_alua_tg_pt_gp *tg_pt_gp, 2301 char *page) 2302 { 2303 return core_alua_show_implicit_trans_secs(tg_pt_gp, page); 2304 } 2305 2306 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs( 2307 struct t10_alua_tg_pt_gp *tg_pt_gp, 2308 const char *page, 2309 size_t count) 2310 { 2311 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count); 2312 } 2313 2314 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR); 2315 2316 /* 2317 * preferred 2318 */ 2319 2320 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2321 struct t10_alua_tg_pt_gp *tg_pt_gp, 2322 char *page) 2323 { 2324 return core_alua_show_preferred_bit(tg_pt_gp, page); 2325 } 2326 2327 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2328 struct t10_alua_tg_pt_gp *tg_pt_gp, 2329 const char *page, 2330 size_t count) 2331 { 2332 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2333 } 2334 2335 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2336 2337 /* 2338 * tg_pt_gp_id 2339 */ 2340 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2341 struct t10_alua_tg_pt_gp *tg_pt_gp, 2342 char *page) 2343 { 2344 if (!tg_pt_gp->tg_pt_gp_valid_id) 2345 return 0; 2346 2347 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2348 } 2349 2350 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2351 struct t10_alua_tg_pt_gp *tg_pt_gp, 2352 const char *page, 2353 size_t count) 2354 { 2355 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2356 unsigned long tg_pt_gp_id; 2357 int ret; 2358 2359 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2360 if (ret < 0) { 2361 pr_err("kstrtoul() returned %d for" 2362 " tg_pt_gp_id\n", ret); 2363 return ret; 2364 } 2365 if (tg_pt_gp_id > 0x0000ffff) { 2366 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2367 " 0x0000ffff\n", tg_pt_gp_id); 2368 return -EINVAL; 2369 } 2370 2371 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2372 if (ret < 0) 2373 return -EINVAL; 2374 2375 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2376 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2377 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2378 tg_pt_gp->tg_pt_gp_id); 2379 2380 return count; 2381 } 2382 2383 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2384 2385 /* 2386 * members 2387 */ 2388 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2389 struct t10_alua_tg_pt_gp *tg_pt_gp, 2390 char *page) 2391 { 2392 struct se_port *port; 2393 struct se_portal_group *tpg; 2394 struct se_lun *lun; 2395 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2396 ssize_t len = 0, cur_len; 2397 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2398 2399 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2400 2401 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2402 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2403 tg_pt_gp_mem_list) { 2404 port = tg_pt_gp_mem->tg_pt; 2405 tpg = port->sep_tpg; 2406 lun = port->sep_lun; 2407 2408 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2409 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2410 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2411 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2412 config_item_name(&lun->lun_group.cg_item)); 2413 cur_len++; /* Extra byte for NULL terminator */ 2414 2415 if ((cur_len + len) > PAGE_SIZE) { 2416 pr_warn("Ran out of lu_gp_show_attr" 2417 "_members buffer\n"); 2418 break; 2419 } 2420 memcpy(page+len, buf, cur_len); 2421 len += cur_len; 2422 } 2423 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2424 2425 return len; 2426 } 2427 2428 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2429 2430 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2431 tg_pt_gp_group); 2432 2433 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2434 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2435 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2436 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2437 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr, 2438 &target_core_alua_tg_pt_gp_alua_support_offline.attr, 2439 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr, 2440 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr, 2441 &target_core_alua_tg_pt_gp_alua_support_standby.attr, 2442 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr, 2443 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr, 2444 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2445 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2446 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2447 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr, 2448 &target_core_alua_tg_pt_gp_preferred.attr, 2449 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2450 &target_core_alua_tg_pt_gp_members.attr, 2451 NULL, 2452 }; 2453 2454 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2455 { 2456 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2457 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2458 2459 core_alua_free_tg_pt_gp(tg_pt_gp); 2460 } 2461 2462 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2463 .release = target_core_alua_tg_pt_gp_release, 2464 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2465 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2466 }; 2467 2468 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2469 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2470 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2471 .ct_owner = THIS_MODULE, 2472 }; 2473 2474 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2475 2476 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2477 2478 static struct config_group *target_core_alua_create_tg_pt_gp( 2479 struct config_group *group, 2480 const char *name) 2481 { 2482 struct t10_alua *alua = container_of(group, struct t10_alua, 2483 alua_tg_pt_gps_group); 2484 struct t10_alua_tg_pt_gp *tg_pt_gp; 2485 struct config_group *alua_tg_pt_gp_cg = NULL; 2486 struct config_item *alua_tg_pt_gp_ci = NULL; 2487 2488 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2489 if (!tg_pt_gp) 2490 return NULL; 2491 2492 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2493 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2494 2495 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2496 &target_core_alua_tg_pt_gp_cit); 2497 2498 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2499 " Group: alua/tg_pt_gps/%s\n", 2500 config_item_name(alua_tg_pt_gp_ci)); 2501 2502 return alua_tg_pt_gp_cg; 2503 } 2504 2505 static void target_core_alua_drop_tg_pt_gp( 2506 struct config_group *group, 2507 struct config_item *item) 2508 { 2509 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2510 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2511 2512 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2513 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2514 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2515 /* 2516 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2517 * -> target_core_alua_tg_pt_gp_release(). 2518 */ 2519 config_item_put(item); 2520 } 2521 2522 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2523 .make_group = &target_core_alua_create_tg_pt_gp, 2524 .drop_item = &target_core_alua_drop_tg_pt_gp, 2525 }; 2526 2527 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2528 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2529 .ct_owner = THIS_MODULE, 2530 }; 2531 2532 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2533 2534 /* Start functions for struct config_item_type target_core_alua_cit */ 2535 2536 /* 2537 * target_core_alua_cit is a ConfigFS group that lives under 2538 * /sys/kernel/config/target/core/alua. There are default groups 2539 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2540 * target_core_alua_cit in target_core_init_configfs() below. 2541 */ 2542 static struct config_item_type target_core_alua_cit = { 2543 .ct_item_ops = NULL, 2544 .ct_attrs = NULL, 2545 .ct_owner = THIS_MODULE, 2546 }; 2547 2548 /* End functions for struct config_item_type target_core_alua_cit */ 2549 2550 /* Start functions for struct config_item_type target_core_stat_cit */ 2551 2552 static struct config_group *target_core_stat_mkdir( 2553 struct config_group *group, 2554 const char *name) 2555 { 2556 return ERR_PTR(-ENOSYS); 2557 } 2558 2559 static void target_core_stat_rmdir( 2560 struct config_group *group, 2561 struct config_item *item) 2562 { 2563 return; 2564 } 2565 2566 static struct configfs_group_operations target_core_stat_group_ops = { 2567 .make_group = &target_core_stat_mkdir, 2568 .drop_item = &target_core_stat_rmdir, 2569 }; 2570 2571 static struct config_item_type target_core_stat_cit = { 2572 .ct_group_ops = &target_core_stat_group_ops, 2573 .ct_owner = THIS_MODULE, 2574 }; 2575 2576 /* End functions for struct config_item_type target_core_stat_cit */ 2577 2578 /* Start functions for struct config_item_type target_core_hba_cit */ 2579 2580 static struct config_group *target_core_make_subdev( 2581 struct config_group *group, 2582 const char *name) 2583 { 2584 struct t10_alua_tg_pt_gp *tg_pt_gp; 2585 struct se_subsystem_api *t; 2586 struct config_item *hba_ci = &group->cg_item; 2587 struct se_hba *hba = item_to_hba(hba_ci); 2588 struct se_device *dev; 2589 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2590 struct config_group *dev_stat_grp = NULL; 2591 int errno = -ENOMEM, ret; 2592 2593 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2594 if (ret) 2595 return ERR_PTR(ret); 2596 /* 2597 * Locate the struct se_subsystem_api from parent's struct se_hba. 2598 */ 2599 t = hba->transport; 2600 2601 dev = target_alloc_device(hba, name); 2602 if (!dev) 2603 goto out_unlock; 2604 2605 dev_cg = &dev->dev_group; 2606 2607 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2608 GFP_KERNEL); 2609 if (!dev_cg->default_groups) 2610 goto out_free_device; 2611 2612 config_group_init_type_name(dev_cg, name, &target_core_dev_cit); 2613 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2614 &target_core_dev_attrib_cit); 2615 config_group_init_type_name(&dev->dev_pr_group, "pr", 2616 &target_core_dev_pr_cit); 2617 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2618 &target_core_dev_wwn_cit); 2619 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2620 "alua", &target_core_alua_tg_pt_gps_cit); 2621 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2622 "statistics", &target_core_stat_cit); 2623 2624 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2625 dev_cg->default_groups[1] = &dev->dev_pr_group; 2626 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2627 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2628 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2629 dev_cg->default_groups[5] = NULL; 2630 /* 2631 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2632 */ 2633 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2634 if (!tg_pt_gp) 2635 goto out_free_dev_cg_default_groups; 2636 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2637 2638 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2639 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2640 GFP_KERNEL); 2641 if (!tg_pt_gp_cg->default_groups) { 2642 pr_err("Unable to allocate tg_pt_gp_cg->" 2643 "default_groups\n"); 2644 goto out_free_tg_pt_gp; 2645 } 2646 2647 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2648 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2649 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2650 tg_pt_gp_cg->default_groups[1] = NULL; 2651 /* 2652 * Add core/$HBA/$DEV/statistics/ default groups 2653 */ 2654 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2655 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2656 GFP_KERNEL); 2657 if (!dev_stat_grp->default_groups) { 2658 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2659 goto out_free_tg_pt_gp_cg_default_groups; 2660 } 2661 target_stat_setup_dev_default_groups(dev); 2662 2663 mutex_unlock(&hba->hba_access_mutex); 2664 return dev_cg; 2665 2666 out_free_tg_pt_gp_cg_default_groups: 2667 kfree(tg_pt_gp_cg->default_groups); 2668 out_free_tg_pt_gp: 2669 core_alua_free_tg_pt_gp(tg_pt_gp); 2670 out_free_dev_cg_default_groups: 2671 kfree(dev_cg->default_groups); 2672 out_free_device: 2673 target_free_device(dev); 2674 out_unlock: 2675 mutex_unlock(&hba->hba_access_mutex); 2676 return ERR_PTR(errno); 2677 } 2678 2679 static void target_core_drop_subdev( 2680 struct config_group *group, 2681 struct config_item *item) 2682 { 2683 struct config_group *dev_cg = to_config_group(item); 2684 struct se_device *dev = 2685 container_of(dev_cg, struct se_device, dev_group); 2686 struct se_hba *hba; 2687 struct config_item *df_item; 2688 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2689 int i; 2690 2691 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2692 2693 mutex_lock(&hba->hba_access_mutex); 2694 2695 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2696 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2697 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2698 dev_stat_grp->default_groups[i] = NULL; 2699 config_item_put(df_item); 2700 } 2701 kfree(dev_stat_grp->default_groups); 2702 2703 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2704 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2705 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2706 tg_pt_gp_cg->default_groups[i] = NULL; 2707 config_item_put(df_item); 2708 } 2709 kfree(tg_pt_gp_cg->default_groups); 2710 /* 2711 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2712 * directly from target_core_alua_tg_pt_gp_release(). 2713 */ 2714 dev->t10_alua.default_tg_pt_gp = NULL; 2715 2716 for (i = 0; dev_cg->default_groups[i]; i++) { 2717 df_item = &dev_cg->default_groups[i]->cg_item; 2718 dev_cg->default_groups[i] = NULL; 2719 config_item_put(df_item); 2720 } 2721 /* 2722 * se_dev is released from target_core_dev_item_ops->release() 2723 */ 2724 config_item_put(item); 2725 mutex_unlock(&hba->hba_access_mutex); 2726 } 2727 2728 static struct configfs_group_operations target_core_hba_group_ops = { 2729 .make_group = target_core_make_subdev, 2730 .drop_item = target_core_drop_subdev, 2731 }; 2732 2733 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2734 #define SE_HBA_ATTR(_name, _mode) \ 2735 static struct target_core_hba_attribute \ 2736 target_core_hba_##_name = \ 2737 __CONFIGFS_EATTR(_name, _mode, \ 2738 target_core_hba_show_attr_##_name, \ 2739 target_core_hba_store_attr_##_name); 2740 2741 #define SE_HBA_ATTR_RO(_name) \ 2742 static struct target_core_hba_attribute \ 2743 target_core_hba_##_name = \ 2744 __CONFIGFS_EATTR_RO(_name, \ 2745 target_core_hba_show_attr_##_name); 2746 2747 static ssize_t target_core_hba_show_attr_hba_info( 2748 struct se_hba *hba, 2749 char *page) 2750 { 2751 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2752 hba->hba_id, hba->transport->name, 2753 TARGET_CORE_CONFIGFS_VERSION); 2754 } 2755 2756 SE_HBA_ATTR_RO(hba_info); 2757 2758 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2759 char *page) 2760 { 2761 int hba_mode = 0; 2762 2763 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2764 hba_mode = 1; 2765 2766 return sprintf(page, "%d\n", hba_mode); 2767 } 2768 2769 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2770 const char *page, size_t count) 2771 { 2772 struct se_subsystem_api *transport = hba->transport; 2773 unsigned long mode_flag; 2774 int ret; 2775 2776 if (transport->pmode_enable_hba == NULL) 2777 return -EINVAL; 2778 2779 ret = kstrtoul(page, 0, &mode_flag); 2780 if (ret < 0) { 2781 pr_err("Unable to extract hba mode flag: %d\n", ret); 2782 return ret; 2783 } 2784 2785 if (hba->dev_count) { 2786 pr_err("Unable to set hba_mode with active devices\n"); 2787 return -EINVAL; 2788 } 2789 2790 ret = transport->pmode_enable_hba(hba, mode_flag); 2791 if (ret < 0) 2792 return -EINVAL; 2793 if (ret > 0) 2794 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2795 else if (ret == 0) 2796 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2797 2798 return count; 2799 } 2800 2801 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2802 2803 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2804 2805 static void target_core_hba_release(struct config_item *item) 2806 { 2807 struct se_hba *hba = container_of(to_config_group(item), 2808 struct se_hba, hba_group); 2809 core_delete_hba(hba); 2810 } 2811 2812 static struct configfs_attribute *target_core_hba_attrs[] = { 2813 &target_core_hba_hba_info.attr, 2814 &target_core_hba_hba_mode.attr, 2815 NULL, 2816 }; 2817 2818 static struct configfs_item_operations target_core_hba_item_ops = { 2819 .release = target_core_hba_release, 2820 .show_attribute = target_core_hba_attr_show, 2821 .store_attribute = target_core_hba_attr_store, 2822 }; 2823 2824 static struct config_item_type target_core_hba_cit = { 2825 .ct_item_ops = &target_core_hba_item_ops, 2826 .ct_group_ops = &target_core_hba_group_ops, 2827 .ct_attrs = target_core_hba_attrs, 2828 .ct_owner = THIS_MODULE, 2829 }; 2830 2831 static struct config_group *target_core_call_addhbatotarget( 2832 struct config_group *group, 2833 const char *name) 2834 { 2835 char *se_plugin_str, *str, *str2; 2836 struct se_hba *hba; 2837 char buf[TARGET_CORE_NAME_MAX_LEN]; 2838 unsigned long plugin_dep_id = 0; 2839 int ret; 2840 2841 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 2842 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 2843 pr_err("Passed *name strlen(): %d exceeds" 2844 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 2845 TARGET_CORE_NAME_MAX_LEN); 2846 return ERR_PTR(-ENAMETOOLONG); 2847 } 2848 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 2849 2850 str = strstr(buf, "_"); 2851 if (!str) { 2852 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 2853 return ERR_PTR(-EINVAL); 2854 } 2855 se_plugin_str = buf; 2856 /* 2857 * Special case for subsystem plugins that have "_" in their names. 2858 * Namely rd_direct and rd_mcp.. 2859 */ 2860 str2 = strstr(str+1, "_"); 2861 if (str2) { 2862 *str2 = '\0'; /* Terminate for *se_plugin_str */ 2863 str2++; /* Skip to start of plugin dependent ID */ 2864 str = str2; 2865 } else { 2866 *str = '\0'; /* Terminate for *se_plugin_str */ 2867 str++; /* Skip to start of plugin dependent ID */ 2868 } 2869 2870 ret = kstrtoul(str, 0, &plugin_dep_id); 2871 if (ret < 0) { 2872 pr_err("kstrtoul() returned %d for" 2873 " plugin_dep_id\n", ret); 2874 return ERR_PTR(ret); 2875 } 2876 /* 2877 * Load up TCM subsystem plugins if they have not already been loaded. 2878 */ 2879 transport_subsystem_check_init(); 2880 2881 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 2882 if (IS_ERR(hba)) 2883 return ERR_CAST(hba); 2884 2885 config_group_init_type_name(&hba->hba_group, name, 2886 &target_core_hba_cit); 2887 2888 return &hba->hba_group; 2889 } 2890 2891 static void target_core_call_delhbafromtarget( 2892 struct config_group *group, 2893 struct config_item *item) 2894 { 2895 /* 2896 * core_delete_hba() is called from target_core_hba_item_ops->release() 2897 * -> target_core_hba_release() 2898 */ 2899 config_item_put(item); 2900 } 2901 2902 static struct configfs_group_operations target_core_group_ops = { 2903 .make_group = target_core_call_addhbatotarget, 2904 .drop_item = target_core_call_delhbafromtarget, 2905 }; 2906 2907 static struct config_item_type target_core_cit = { 2908 .ct_item_ops = NULL, 2909 .ct_group_ops = &target_core_group_ops, 2910 .ct_attrs = NULL, 2911 .ct_owner = THIS_MODULE, 2912 }; 2913 2914 /* Stop functions for struct config_item_type target_core_hba_cit */ 2915 2916 static int __init target_core_init_configfs(void) 2917 { 2918 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 2919 struct config_group *lu_gp_cg = NULL; 2920 struct configfs_subsystem *subsys; 2921 struct t10_alua_lu_gp *lu_gp; 2922 int ret; 2923 2924 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 2925 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 2926 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 2927 2928 subsys = target_core_subsystem[0]; 2929 config_group_init(&subsys->su_group); 2930 mutex_init(&subsys->su_mutex); 2931 2932 ret = init_se_kmem_caches(); 2933 if (ret < 0) 2934 return ret; 2935 /* 2936 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 2937 * and ALUA Logical Unit Group and Target Port Group infrastructure. 2938 */ 2939 target_cg = &subsys->su_group; 2940 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2, 2941 GFP_KERNEL); 2942 if (!target_cg->default_groups) { 2943 pr_err("Unable to allocate target_cg->default_groups\n"); 2944 ret = -ENOMEM; 2945 goto out_global; 2946 } 2947 2948 config_group_init_type_name(&target_core_hbagroup, 2949 "core", &target_core_cit); 2950 target_cg->default_groups[0] = &target_core_hbagroup; 2951 target_cg->default_groups[1] = NULL; 2952 /* 2953 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 2954 */ 2955 hba_cg = &target_core_hbagroup; 2956 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2957 GFP_KERNEL); 2958 if (!hba_cg->default_groups) { 2959 pr_err("Unable to allocate hba_cg->default_groups\n"); 2960 ret = -ENOMEM; 2961 goto out_global; 2962 } 2963 config_group_init_type_name(&alua_group, 2964 "alua", &target_core_alua_cit); 2965 hba_cg->default_groups[0] = &alua_group; 2966 hba_cg->default_groups[1] = NULL; 2967 /* 2968 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 2969 * groups under /sys/kernel/config/target/core/alua/ 2970 */ 2971 alua_cg = &alua_group; 2972 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2973 GFP_KERNEL); 2974 if (!alua_cg->default_groups) { 2975 pr_err("Unable to allocate alua_cg->default_groups\n"); 2976 ret = -ENOMEM; 2977 goto out_global; 2978 } 2979 2980 config_group_init_type_name(&alua_lu_gps_group, 2981 "lu_gps", &target_core_alua_lu_gps_cit); 2982 alua_cg->default_groups[0] = &alua_lu_gps_group; 2983 alua_cg->default_groups[1] = NULL; 2984 /* 2985 * Add core/alua/lu_gps/default_lu_gp 2986 */ 2987 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 2988 if (IS_ERR(lu_gp)) { 2989 ret = -ENOMEM; 2990 goto out_global; 2991 } 2992 2993 lu_gp_cg = &alua_lu_gps_group; 2994 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2995 GFP_KERNEL); 2996 if (!lu_gp_cg->default_groups) { 2997 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 2998 ret = -ENOMEM; 2999 goto out_global; 3000 } 3001 3002 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3003 &target_core_alua_lu_gp_cit); 3004 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3005 lu_gp_cg->default_groups[1] = NULL; 3006 default_lu_gp = lu_gp; 3007 /* 3008 * Register the target_core_mod subsystem with configfs. 3009 */ 3010 ret = configfs_register_subsystem(subsys); 3011 if (ret < 0) { 3012 pr_err("Error %d while registering subsystem %s\n", 3013 ret, subsys->su_group.cg_item.ci_namebuf); 3014 goto out_global; 3015 } 3016 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3017 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3018 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3019 /* 3020 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3021 */ 3022 ret = rd_module_init(); 3023 if (ret < 0) 3024 goto out; 3025 3026 ret = core_dev_setup_virtual_lun0(); 3027 if (ret < 0) 3028 goto out; 3029 3030 ret = target_xcopy_setup_pt(); 3031 if (ret < 0) 3032 goto out; 3033 3034 return 0; 3035 3036 out: 3037 configfs_unregister_subsystem(subsys); 3038 core_dev_release_virtual_lun0(); 3039 rd_module_exit(); 3040 out_global: 3041 if (default_lu_gp) { 3042 core_alua_free_lu_gp(default_lu_gp); 3043 default_lu_gp = NULL; 3044 } 3045 if (lu_gp_cg) 3046 kfree(lu_gp_cg->default_groups); 3047 if (alua_cg) 3048 kfree(alua_cg->default_groups); 3049 if (hba_cg) 3050 kfree(hba_cg->default_groups); 3051 kfree(target_cg->default_groups); 3052 release_se_kmem_caches(); 3053 return ret; 3054 } 3055 3056 static void __exit target_core_exit_configfs(void) 3057 { 3058 struct configfs_subsystem *subsys; 3059 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3060 struct config_item *item; 3061 int i; 3062 3063 subsys = target_core_subsystem[0]; 3064 3065 lu_gp_cg = &alua_lu_gps_group; 3066 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3067 item = &lu_gp_cg->default_groups[i]->cg_item; 3068 lu_gp_cg->default_groups[i] = NULL; 3069 config_item_put(item); 3070 } 3071 kfree(lu_gp_cg->default_groups); 3072 lu_gp_cg->default_groups = NULL; 3073 3074 alua_cg = &alua_group; 3075 for (i = 0; alua_cg->default_groups[i]; i++) { 3076 item = &alua_cg->default_groups[i]->cg_item; 3077 alua_cg->default_groups[i] = NULL; 3078 config_item_put(item); 3079 } 3080 kfree(alua_cg->default_groups); 3081 alua_cg->default_groups = NULL; 3082 3083 hba_cg = &target_core_hbagroup; 3084 for (i = 0; hba_cg->default_groups[i]; i++) { 3085 item = &hba_cg->default_groups[i]->cg_item; 3086 hba_cg->default_groups[i] = NULL; 3087 config_item_put(item); 3088 } 3089 kfree(hba_cg->default_groups); 3090 hba_cg->default_groups = NULL; 3091 /* 3092 * We expect subsys->su_group.default_groups to be released 3093 * by configfs subsystem provider logic.. 3094 */ 3095 configfs_unregister_subsystem(subsys); 3096 kfree(subsys->su_group.default_groups); 3097 3098 core_alua_free_lu_gp(default_lu_gp); 3099 default_lu_gp = NULL; 3100 3101 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3102 " Infrastructure\n"); 3103 3104 core_dev_release_virtual_lun0(); 3105 rd_module_exit(); 3106 target_xcopy_release_pt(); 3107 release_se_kmem_caches(); 3108 } 3109 3110 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3111 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3112 MODULE_LICENSE("GPL"); 3113 3114 module_init(target_core_init_configfs); 3115 module_exit(target_core_exit_configfs); 3116