1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * Copyright (c) 2008-2011 Rising Tide Systems 7 * Copyright (c) 2008-2011 Linux-iSCSI.org 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 ****************************************************************************/ 23 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <generated/utsrelease.h> 27 #include <linux/utsname.h> 28 #include <linux/init.h> 29 #include <linux/fs.h> 30 #include <linux/namei.h> 31 #include <linux/slab.h> 32 #include <linux/types.h> 33 #include <linux/delay.h> 34 #include <linux/unistd.h> 35 #include <linux/string.h> 36 #include <linux/parser.h> 37 #include <linux/syscalls.h> 38 #include <linux/configfs.h> 39 #include <linux/spinlock.h> 40 41 #include <target/target_core_base.h> 42 #include <target/target_core_backend.h> 43 #include <target/target_core_fabric.h> 44 #include <target/target_core_fabric_configfs.h> 45 #include <target/target_core_configfs.h> 46 #include <target/configfs_macros.h> 47 48 #include "target_core_internal.h" 49 #include "target_core_alua.h" 50 #include "target_core_pr.h" 51 #include "target_core_rd.h" 52 53 extern struct t10_alua_lu_gp *default_lu_gp; 54 55 static struct list_head g_tf_list; 56 static struct 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_CIT_TMPL(tf)->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_CIT_TMPL(tf)->tfc_wwn_cit); 188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 189 &TF_CIT_TMPL(tf)->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 static 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->stop_session) { 425 pr_err("Missing tfo->stop_session()\n"); 426 return -EINVAL; 427 } 428 if (!tfo->fall_back_to_erl0) { 429 pr_err("Missing tfo->fall_back_to_erl0()\n"); 430 return -EINVAL; 431 } 432 if (!tfo->sess_logged_in) { 433 pr_err("Missing tfo->sess_logged_in()\n"); 434 return -EINVAL; 435 } 436 if (!tfo->sess_get_index) { 437 pr_err("Missing tfo->sess_get_index()\n"); 438 return -EINVAL; 439 } 440 if (!tfo->write_pending) { 441 pr_err("Missing tfo->write_pending()\n"); 442 return -EINVAL; 443 } 444 if (!tfo->write_pending_status) { 445 pr_err("Missing tfo->write_pending_status()\n"); 446 return -EINVAL; 447 } 448 if (!tfo->set_default_node_attributes) { 449 pr_err("Missing tfo->set_default_node_attributes()\n"); 450 return -EINVAL; 451 } 452 if (!tfo->get_task_tag) { 453 pr_err("Missing tfo->get_task_tag()\n"); 454 return -EINVAL; 455 } 456 if (!tfo->get_cmd_state) { 457 pr_err("Missing tfo->get_cmd_state()\n"); 458 return -EINVAL; 459 } 460 if (!tfo->queue_data_in) { 461 pr_err("Missing tfo->queue_data_in()\n"); 462 return -EINVAL; 463 } 464 if (!tfo->queue_status) { 465 pr_err("Missing tfo->queue_status()\n"); 466 return -EINVAL; 467 } 468 if (!tfo->queue_tm_rsp) { 469 pr_err("Missing tfo->queue_tm_rsp()\n"); 470 return -EINVAL; 471 } 472 if (!tfo->set_fabric_sense_len) { 473 pr_err("Missing tfo->set_fabric_sense_len()\n"); 474 return -EINVAL; 475 } 476 if (!tfo->get_fabric_sense_len) { 477 pr_err("Missing tfo->get_fabric_sense_len()\n"); 478 return -EINVAL; 479 } 480 if (!tfo->is_state_remove) { 481 pr_err("Missing tfo->is_state_remove()\n"); 482 return -EINVAL; 483 } 484 /* 485 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 486 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 487 * target_core_fabric_configfs.c WWN+TPG group context code. 488 */ 489 if (!tfo->fabric_make_wwn) { 490 pr_err("Missing tfo->fabric_make_wwn()\n"); 491 return -EINVAL; 492 } 493 if (!tfo->fabric_drop_wwn) { 494 pr_err("Missing tfo->fabric_drop_wwn()\n"); 495 return -EINVAL; 496 } 497 if (!tfo->fabric_make_tpg) { 498 pr_err("Missing tfo->fabric_make_tpg()\n"); 499 return -EINVAL; 500 } 501 if (!tfo->fabric_drop_tpg) { 502 pr_err("Missing tfo->fabric_drop_tpg()\n"); 503 return -EINVAL; 504 } 505 506 return 0; 507 } 508 509 /* 510 * Called 2nd from fabric module with returned parameter of 511 * struct target_fabric_configfs * from target_fabric_configfs_init(). 512 * 513 * Upon a successful registration, the new fabric's struct config_item is 514 * return. Also, a pointer to this struct is set in the passed 515 * struct target_fabric_configfs. 516 */ 517 int target_fabric_configfs_register( 518 struct target_fabric_configfs *tf) 519 { 520 int ret; 521 522 if (!tf) { 523 pr_err("Unable to locate target_fabric_configfs" 524 " pointer\n"); 525 return -EINVAL; 526 } 527 if (!tf->tf_subsys) { 528 pr_err("Unable to target struct config_subsystem" 529 " pointer\n"); 530 return -EINVAL; 531 } 532 ret = target_fabric_tf_ops_check(tf); 533 if (ret < 0) 534 return ret; 535 536 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 537 ">>>>>>>>>>\n"); 538 return 0; 539 } 540 EXPORT_SYMBOL(target_fabric_configfs_register); 541 542 void target_fabric_configfs_deregister( 543 struct target_fabric_configfs *tf) 544 { 545 struct configfs_subsystem *su; 546 547 if (!tf) { 548 pr_err("Unable to locate passed target_fabric_" 549 "configfs\n"); 550 return; 551 } 552 su = tf->tf_subsys; 553 if (!su) { 554 pr_err("Unable to locate passed tf->tf_subsys" 555 " pointer\n"); 556 return; 557 } 558 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 559 ">>>>>>>>>>>>\n"); 560 mutex_lock(&g_tf_lock); 561 if (atomic_read(&tf->tf_access_cnt)) { 562 mutex_unlock(&g_tf_lock); 563 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 564 tf->tf_name); 565 BUG(); 566 } 567 list_del(&tf->tf_list); 568 mutex_unlock(&g_tf_lock); 569 570 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 571 " %s\n", tf->tf_name); 572 tf->tf_module = NULL; 573 tf->tf_subsys = NULL; 574 kfree(tf); 575 576 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 577 ">>>>>\n"); 578 } 579 EXPORT_SYMBOL(target_fabric_configfs_deregister); 580 581 /*############################################################################## 582 // Stop functions called by external Target Fabrics Modules 583 //############################################################################*/ 584 585 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 586 587 #define DEF_DEV_ATTRIB_SHOW(_name) \ 588 static ssize_t target_core_dev_show_attr_##_name( \ 589 struct se_dev_attrib *da, \ 590 char *page) \ 591 { \ 592 struct se_device *dev; \ 593 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 594 ssize_t rb; \ 595 \ 596 spin_lock(&se_dev->se_dev_lock); \ 597 dev = se_dev->se_dev_ptr; \ 598 if (!dev) { \ 599 spin_unlock(&se_dev->se_dev_lock); \ 600 return -ENODEV; \ 601 } \ 602 rb = snprintf(page, PAGE_SIZE, "%u\n", \ 603 (u32)dev->se_sub_dev->se_dev_attrib._name); \ 604 spin_unlock(&se_dev->se_dev_lock); \ 605 \ 606 return rb; \ 607 } 608 609 #define DEF_DEV_ATTRIB_STORE(_name) \ 610 static ssize_t target_core_dev_store_attr_##_name( \ 611 struct se_dev_attrib *da, \ 612 const char *page, \ 613 size_t count) \ 614 { \ 615 struct se_device *dev; \ 616 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 617 unsigned long val; \ 618 int ret; \ 619 \ 620 spin_lock(&se_dev->se_dev_lock); \ 621 dev = se_dev->se_dev_ptr; \ 622 if (!dev) { \ 623 spin_unlock(&se_dev->se_dev_lock); \ 624 return -ENODEV; \ 625 } \ 626 ret = strict_strtoul(page, 0, &val); \ 627 if (ret < 0) { \ 628 spin_unlock(&se_dev->se_dev_lock); \ 629 pr_err("strict_strtoul() failed with" \ 630 " ret: %d\n", ret); \ 631 return -EINVAL; \ 632 } \ 633 ret = se_dev_set_##_name(dev, (u32)val); \ 634 spin_unlock(&se_dev->se_dev_lock); \ 635 \ 636 return (!ret) ? count : -EINVAL; \ 637 } 638 639 #define DEF_DEV_ATTRIB(_name) \ 640 DEF_DEV_ATTRIB_SHOW(_name); \ 641 DEF_DEV_ATTRIB_STORE(_name); 642 643 #define DEF_DEV_ATTRIB_RO(_name) \ 644 DEF_DEV_ATTRIB_SHOW(_name); 645 646 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 647 #define SE_DEV_ATTR(_name, _mode) \ 648 static struct target_core_dev_attrib_attribute \ 649 target_core_dev_attrib_##_name = \ 650 __CONFIGFS_EATTR(_name, _mode, \ 651 target_core_dev_show_attr_##_name, \ 652 target_core_dev_store_attr_##_name); 653 654 #define SE_DEV_ATTR_RO(_name); \ 655 static struct target_core_dev_attrib_attribute \ 656 target_core_dev_attrib_##_name = \ 657 __CONFIGFS_EATTR_RO(_name, \ 658 target_core_dev_show_attr_##_name); 659 660 DEF_DEV_ATTRIB(emulate_dpo); 661 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 662 663 DEF_DEV_ATTRIB(emulate_fua_write); 664 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 665 666 DEF_DEV_ATTRIB(emulate_fua_read); 667 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 668 669 DEF_DEV_ATTRIB(emulate_write_cache); 670 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 671 672 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 673 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 674 675 DEF_DEV_ATTRIB(emulate_tas); 676 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 677 678 DEF_DEV_ATTRIB(emulate_tpu); 679 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 680 681 DEF_DEV_ATTRIB(emulate_tpws); 682 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 683 684 DEF_DEV_ATTRIB(enforce_pr_isids); 685 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 686 687 DEF_DEV_ATTRIB(is_nonrot); 688 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 689 690 DEF_DEV_ATTRIB(emulate_rest_reord); 691 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 692 693 DEF_DEV_ATTRIB_RO(hw_block_size); 694 SE_DEV_ATTR_RO(hw_block_size); 695 696 DEF_DEV_ATTRIB(block_size); 697 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 698 699 DEF_DEV_ATTRIB_RO(hw_max_sectors); 700 SE_DEV_ATTR_RO(hw_max_sectors); 701 702 DEF_DEV_ATTRIB(max_sectors); 703 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR); 704 705 DEF_DEV_ATTRIB(optimal_sectors); 706 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 707 708 DEF_DEV_ATTRIB_RO(hw_queue_depth); 709 SE_DEV_ATTR_RO(hw_queue_depth); 710 711 DEF_DEV_ATTRIB(queue_depth); 712 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 713 714 DEF_DEV_ATTRIB(max_unmap_lba_count); 715 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 716 717 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 718 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 719 720 DEF_DEV_ATTRIB(unmap_granularity); 721 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 722 723 DEF_DEV_ATTRIB(unmap_granularity_alignment); 724 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 725 726 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 727 728 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 729 &target_core_dev_attrib_emulate_dpo.attr, 730 &target_core_dev_attrib_emulate_fua_write.attr, 731 &target_core_dev_attrib_emulate_fua_read.attr, 732 &target_core_dev_attrib_emulate_write_cache.attr, 733 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 734 &target_core_dev_attrib_emulate_tas.attr, 735 &target_core_dev_attrib_emulate_tpu.attr, 736 &target_core_dev_attrib_emulate_tpws.attr, 737 &target_core_dev_attrib_enforce_pr_isids.attr, 738 &target_core_dev_attrib_is_nonrot.attr, 739 &target_core_dev_attrib_emulate_rest_reord.attr, 740 &target_core_dev_attrib_hw_block_size.attr, 741 &target_core_dev_attrib_block_size.attr, 742 &target_core_dev_attrib_hw_max_sectors.attr, 743 &target_core_dev_attrib_max_sectors.attr, 744 &target_core_dev_attrib_optimal_sectors.attr, 745 &target_core_dev_attrib_hw_queue_depth.attr, 746 &target_core_dev_attrib_queue_depth.attr, 747 &target_core_dev_attrib_max_unmap_lba_count.attr, 748 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 749 &target_core_dev_attrib_unmap_granularity.attr, 750 &target_core_dev_attrib_unmap_granularity_alignment.attr, 751 NULL, 752 }; 753 754 static struct configfs_item_operations target_core_dev_attrib_ops = { 755 .show_attribute = target_core_dev_attrib_attr_show, 756 .store_attribute = target_core_dev_attrib_attr_store, 757 }; 758 759 static struct config_item_type target_core_dev_attrib_cit = { 760 .ct_item_ops = &target_core_dev_attrib_ops, 761 .ct_attrs = target_core_dev_attrib_attrs, 762 .ct_owner = THIS_MODULE, 763 }; 764 765 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 766 767 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 768 769 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 770 #define SE_DEV_WWN_ATTR(_name, _mode) \ 771 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 772 __CONFIGFS_EATTR(_name, _mode, \ 773 target_core_dev_wwn_show_attr_##_name, \ 774 target_core_dev_wwn_store_attr_##_name); 775 776 #define SE_DEV_WWN_ATTR_RO(_name); \ 777 do { \ 778 static struct target_core_dev_wwn_attribute \ 779 target_core_dev_wwn_##_name = \ 780 __CONFIGFS_EATTR_RO(_name, \ 781 target_core_dev_wwn_show_attr_##_name); \ 782 } while (0); 783 784 /* 785 * VPD page 0x80 Unit serial 786 */ 787 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 788 struct t10_wwn *t10_wwn, 789 char *page) 790 { 791 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 792 struct se_device *dev; 793 794 dev = se_dev->se_dev_ptr; 795 if (!dev) 796 return -ENODEV; 797 798 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 799 &t10_wwn->unit_serial[0]); 800 } 801 802 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 803 struct t10_wwn *t10_wwn, 804 const char *page, 805 size_t count) 806 { 807 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev; 808 struct se_device *dev; 809 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 810 811 /* 812 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 813 * from the struct scsi_device level firmware, do not allow 814 * VPD Unit Serial to be emulated. 815 * 816 * Note this struct scsi_device could also be emulating VPD 817 * information from its drivers/scsi LLD. But for now we assume 818 * it is doing 'the right thing' wrt a world wide unique 819 * VPD Unit Serial Number that OS dependent multipath can depend on. 820 */ 821 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) { 822 pr_err("Underlying SCSI device firmware provided VPD" 823 " Unit Serial, ignoring request\n"); 824 return -EOPNOTSUPP; 825 } 826 827 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 828 pr_err("Emulated VPD Unit Serial exceeds" 829 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 830 return -EOVERFLOW; 831 } 832 /* 833 * Check to see if any active $FABRIC_MOD exports exist. If they 834 * do exist, fail here as changing this information on the fly 835 * (underneath the initiator side OS dependent multipath code) 836 * could cause negative effects. 837 */ 838 dev = su_dev->se_dev_ptr; 839 if (dev) { 840 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 841 pr_err("Unable to set VPD Unit Serial while" 842 " active %d $FABRIC_MOD exports exist\n", 843 atomic_read(&dev->dev_export_obj.obj_access_count)); 844 return -EINVAL; 845 } 846 } 847 /* 848 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 849 * 850 * Also, strip any newline added from the userspace 851 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 852 */ 853 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 854 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 855 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 856 "%s", strstrip(buf)); 857 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL; 858 859 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 860 " %s\n", su_dev->t10_wwn.unit_serial); 861 862 return count; 863 } 864 865 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 866 867 /* 868 * VPD page 0x83 Protocol Identifier 869 */ 870 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 871 struct t10_wwn *t10_wwn, 872 char *page) 873 { 874 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 875 struct se_device *dev; 876 struct t10_vpd *vpd; 877 unsigned char buf[VPD_TMP_BUF_SIZE]; 878 ssize_t len = 0; 879 880 dev = se_dev->se_dev_ptr; 881 if (!dev) 882 return -ENODEV; 883 884 memset(buf, 0, VPD_TMP_BUF_SIZE); 885 886 spin_lock(&t10_wwn->t10_vpd_lock); 887 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 888 if (!vpd->protocol_identifier_set) 889 continue; 890 891 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 892 893 if (len + strlen(buf) >= PAGE_SIZE) 894 break; 895 896 len += sprintf(page+len, "%s", buf); 897 } 898 spin_unlock(&t10_wwn->t10_vpd_lock); 899 900 return len; 901 } 902 903 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 904 struct t10_wwn *t10_wwn, 905 const char *page, 906 size_t count) 907 { 908 return -ENOSYS; 909 } 910 911 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 912 913 /* 914 * Generic wrapper for dumping VPD identifiers by association. 915 */ 916 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 917 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 918 struct t10_wwn *t10_wwn, \ 919 char *page) \ 920 { \ 921 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \ 922 struct se_device *dev; \ 923 struct t10_vpd *vpd; \ 924 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 925 ssize_t len = 0; \ 926 \ 927 dev = se_dev->se_dev_ptr; \ 928 if (!dev) \ 929 return -ENODEV; \ 930 \ 931 spin_lock(&t10_wwn->t10_vpd_lock); \ 932 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 933 if (vpd->association != _assoc) \ 934 continue; \ 935 \ 936 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 937 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 938 if (len + strlen(buf) >= PAGE_SIZE) \ 939 break; \ 940 len += sprintf(page+len, "%s", buf); \ 941 \ 942 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 943 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 944 if (len + strlen(buf) >= PAGE_SIZE) \ 945 break; \ 946 len += sprintf(page+len, "%s", buf); \ 947 \ 948 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 949 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 950 if (len + strlen(buf) >= PAGE_SIZE) \ 951 break; \ 952 len += sprintf(page+len, "%s", buf); \ 953 } \ 954 spin_unlock(&t10_wwn->t10_vpd_lock); \ 955 \ 956 return len; \ 957 } 958 959 /* 960 * VPD page 0x83 Association: Logical Unit 961 */ 962 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 963 964 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 965 struct t10_wwn *t10_wwn, 966 const char *page, 967 size_t count) 968 { 969 return -ENOSYS; 970 } 971 972 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 973 974 /* 975 * VPD page 0x83 Association: Target Port 976 */ 977 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 978 979 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 980 struct t10_wwn *t10_wwn, 981 const char *page, 982 size_t count) 983 { 984 return -ENOSYS; 985 } 986 987 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 988 989 /* 990 * VPD page 0x83 Association: SCSI Target Device 991 */ 992 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 993 994 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 995 struct t10_wwn *t10_wwn, 996 const char *page, 997 size_t count) 998 { 999 return -ENOSYS; 1000 } 1001 1002 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 1003 1004 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 1005 1006 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1007 &target_core_dev_wwn_vpd_unit_serial.attr, 1008 &target_core_dev_wwn_vpd_protocol_identifier.attr, 1009 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 1010 &target_core_dev_wwn_vpd_assoc_target_port.attr, 1011 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 1012 NULL, 1013 }; 1014 1015 static struct configfs_item_operations target_core_dev_wwn_ops = { 1016 .show_attribute = target_core_dev_wwn_attr_show, 1017 .store_attribute = target_core_dev_wwn_attr_store, 1018 }; 1019 1020 static struct config_item_type target_core_dev_wwn_cit = { 1021 .ct_item_ops = &target_core_dev_wwn_ops, 1022 .ct_attrs = target_core_dev_wwn_attrs, 1023 .ct_owner = THIS_MODULE, 1024 }; 1025 1026 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 1027 1028 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 1029 1030 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev); 1031 #define SE_DEV_PR_ATTR(_name, _mode) \ 1032 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1033 __CONFIGFS_EATTR(_name, _mode, \ 1034 target_core_dev_pr_show_attr_##_name, \ 1035 target_core_dev_pr_store_attr_##_name); 1036 1037 #define SE_DEV_PR_ATTR_RO(_name); \ 1038 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1039 __CONFIGFS_EATTR_RO(_name, \ 1040 target_core_dev_pr_show_attr_##_name); 1041 1042 /* 1043 * res_holder 1044 */ 1045 static ssize_t target_core_dev_pr_show_spc3_res( 1046 struct se_device *dev, 1047 char *page, 1048 ssize_t *len) 1049 { 1050 struct se_node_acl *se_nacl; 1051 struct t10_pr_registration *pr_reg; 1052 char i_buf[PR_REG_ISID_ID_LEN]; 1053 int prf_isid; 1054 1055 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1056 1057 spin_lock(&dev->dev_reservation_lock); 1058 pr_reg = dev->dev_pr_res_holder; 1059 if (!pr_reg) { 1060 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n"); 1061 spin_unlock(&dev->dev_reservation_lock); 1062 return *len; 1063 } 1064 se_nacl = pr_reg->pr_reg_nacl; 1065 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1066 PR_REG_ISID_ID_LEN); 1067 1068 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n", 1069 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1070 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 1071 spin_unlock(&dev->dev_reservation_lock); 1072 1073 return *len; 1074 } 1075 1076 static ssize_t target_core_dev_pr_show_spc2_res( 1077 struct se_device *dev, 1078 char *page, 1079 ssize_t *len) 1080 { 1081 struct se_node_acl *se_nacl; 1082 1083 spin_lock(&dev->dev_reservation_lock); 1084 se_nacl = dev->dev_reserved_node_acl; 1085 if (!se_nacl) { 1086 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n"); 1087 spin_unlock(&dev->dev_reservation_lock); 1088 return *len; 1089 } 1090 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n", 1091 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1092 se_nacl->initiatorname); 1093 spin_unlock(&dev->dev_reservation_lock); 1094 1095 return *len; 1096 } 1097 1098 static ssize_t target_core_dev_pr_show_attr_res_holder( 1099 struct se_subsystem_dev *su_dev, 1100 char *page) 1101 { 1102 ssize_t len = 0; 1103 1104 if (!su_dev->se_dev_ptr) 1105 return -ENODEV; 1106 1107 switch (su_dev->t10_pr.res_type) { 1108 case SPC3_PERSISTENT_RESERVATIONS: 1109 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr, 1110 page, &len); 1111 break; 1112 case SPC2_RESERVATIONS: 1113 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr, 1114 page, &len); 1115 break; 1116 case SPC_PASSTHROUGH: 1117 len += sprintf(page+len, "Passthrough\n"); 1118 break; 1119 default: 1120 len += sprintf(page+len, "Unknown\n"); 1121 break; 1122 } 1123 1124 return len; 1125 } 1126 1127 SE_DEV_PR_ATTR_RO(res_holder); 1128 1129 /* 1130 * res_pr_all_tgt_pts 1131 */ 1132 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1133 struct se_subsystem_dev *su_dev, 1134 char *page) 1135 { 1136 struct se_device *dev; 1137 struct t10_pr_registration *pr_reg; 1138 ssize_t len = 0; 1139 1140 dev = su_dev->se_dev_ptr; 1141 if (!dev) 1142 return -ENODEV; 1143 1144 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1145 return len; 1146 1147 spin_lock(&dev->dev_reservation_lock); 1148 pr_reg = dev->dev_pr_res_holder; 1149 if (!pr_reg) { 1150 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1151 spin_unlock(&dev->dev_reservation_lock); 1152 return len; 1153 } 1154 /* 1155 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3 1156 * Basic PERSISTENT RESERVER OUT parameter list, page 290 1157 */ 1158 if (pr_reg->pr_reg_all_tg_pt) 1159 len = sprintf(page, "SPC-3 Reservation: All Target" 1160 " Ports registration\n"); 1161 else 1162 len = sprintf(page, "SPC-3 Reservation: Single" 1163 " Target Port registration\n"); 1164 spin_unlock(&dev->dev_reservation_lock); 1165 1166 return len; 1167 } 1168 1169 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1170 1171 /* 1172 * res_pr_generation 1173 */ 1174 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1175 struct se_subsystem_dev *su_dev, 1176 char *page) 1177 { 1178 if (!su_dev->se_dev_ptr) 1179 return -ENODEV; 1180 1181 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1182 return 0; 1183 1184 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation); 1185 } 1186 1187 SE_DEV_PR_ATTR_RO(res_pr_generation); 1188 1189 /* 1190 * res_pr_holder_tg_port 1191 */ 1192 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1193 struct se_subsystem_dev *su_dev, 1194 char *page) 1195 { 1196 struct se_device *dev; 1197 struct se_node_acl *se_nacl; 1198 struct se_lun *lun; 1199 struct se_portal_group *se_tpg; 1200 struct t10_pr_registration *pr_reg; 1201 struct target_core_fabric_ops *tfo; 1202 ssize_t len = 0; 1203 1204 dev = su_dev->se_dev_ptr; 1205 if (!dev) 1206 return -ENODEV; 1207 1208 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1209 return len; 1210 1211 spin_lock(&dev->dev_reservation_lock); 1212 pr_reg = dev->dev_pr_res_holder; 1213 if (!pr_reg) { 1214 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1215 spin_unlock(&dev->dev_reservation_lock); 1216 return len; 1217 } 1218 se_nacl = pr_reg->pr_reg_nacl; 1219 se_tpg = se_nacl->se_tpg; 1220 lun = pr_reg->pr_reg_tg_pt_lun; 1221 tfo = se_tpg->se_tpg_tfo; 1222 1223 len += sprintf(page+len, "SPC-3 Reservation: %s" 1224 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1225 tfo->tpg_get_wwn(se_tpg)); 1226 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1227 " Identifer Tag: %hu %s Portal Group Tag: %hu" 1228 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1229 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1230 tfo->get_fabric_name(), lun->unpacked_lun); 1231 spin_unlock(&dev->dev_reservation_lock); 1232 1233 return len; 1234 } 1235 1236 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1237 1238 /* 1239 * res_pr_registered_i_pts 1240 */ 1241 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1242 struct se_subsystem_dev *su_dev, 1243 char *page) 1244 { 1245 struct target_core_fabric_ops *tfo; 1246 struct t10_pr_registration *pr_reg; 1247 unsigned char buf[384]; 1248 char i_buf[PR_REG_ISID_ID_LEN]; 1249 ssize_t len = 0; 1250 int reg_count = 0, prf_isid; 1251 1252 if (!su_dev->se_dev_ptr) 1253 return -ENODEV; 1254 1255 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1256 return len; 1257 1258 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1259 1260 spin_lock(&su_dev->t10_pr.registration_lock); 1261 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, 1262 pr_reg_list) { 1263 1264 memset(buf, 0, 384); 1265 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1266 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1267 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1268 PR_REG_ISID_ID_LEN); 1269 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1270 tfo->get_fabric_name(), 1271 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ? 1272 &i_buf[0] : "", pr_reg->pr_res_key, 1273 pr_reg->pr_res_generation); 1274 1275 if (len + strlen(buf) >= PAGE_SIZE) 1276 break; 1277 1278 len += sprintf(page+len, "%s", buf); 1279 reg_count++; 1280 } 1281 spin_unlock(&su_dev->t10_pr.registration_lock); 1282 1283 if (!reg_count) 1284 len += sprintf(page+len, "None\n"); 1285 1286 return len; 1287 } 1288 1289 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1290 1291 /* 1292 * res_pr_type 1293 */ 1294 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1295 struct se_subsystem_dev *su_dev, 1296 char *page) 1297 { 1298 struct se_device *dev; 1299 struct t10_pr_registration *pr_reg; 1300 ssize_t len = 0; 1301 1302 dev = su_dev->se_dev_ptr; 1303 if (!dev) 1304 return -ENODEV; 1305 1306 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1307 return len; 1308 1309 spin_lock(&dev->dev_reservation_lock); 1310 pr_reg = dev->dev_pr_res_holder; 1311 if (!pr_reg) { 1312 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1313 spin_unlock(&dev->dev_reservation_lock); 1314 return len; 1315 } 1316 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1317 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1318 spin_unlock(&dev->dev_reservation_lock); 1319 1320 return len; 1321 } 1322 1323 SE_DEV_PR_ATTR_RO(res_pr_type); 1324 1325 /* 1326 * res_type 1327 */ 1328 static ssize_t target_core_dev_pr_show_attr_res_type( 1329 struct se_subsystem_dev *su_dev, 1330 char *page) 1331 { 1332 ssize_t len = 0; 1333 1334 if (!su_dev->se_dev_ptr) 1335 return -ENODEV; 1336 1337 switch (su_dev->t10_pr.res_type) { 1338 case SPC3_PERSISTENT_RESERVATIONS: 1339 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1340 break; 1341 case SPC2_RESERVATIONS: 1342 len = sprintf(page, "SPC2_RESERVATIONS\n"); 1343 break; 1344 case SPC_PASSTHROUGH: 1345 len = sprintf(page, "SPC_PASSTHROUGH\n"); 1346 break; 1347 default: 1348 len = sprintf(page, "UNKNOWN\n"); 1349 break; 1350 } 1351 1352 return len; 1353 } 1354 1355 SE_DEV_PR_ATTR_RO(res_type); 1356 1357 /* 1358 * res_aptpl_active 1359 */ 1360 1361 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1362 struct se_subsystem_dev *su_dev, 1363 char *page) 1364 { 1365 if (!su_dev->se_dev_ptr) 1366 return -ENODEV; 1367 1368 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1369 return 0; 1370 1371 return sprintf(page, "APTPL Bit Status: %s\n", 1372 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1373 } 1374 1375 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1376 1377 /* 1378 * res_aptpl_metadata 1379 */ 1380 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1381 struct se_subsystem_dev *su_dev, 1382 char *page) 1383 { 1384 if (!su_dev->se_dev_ptr) 1385 return -ENODEV; 1386 1387 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1388 return 0; 1389 1390 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1391 } 1392 1393 enum { 1394 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1395 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1396 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1397 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1398 }; 1399 1400 static match_table_t tokens = { 1401 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1402 {Opt_initiator_node, "initiator_node=%s"}, 1403 {Opt_initiator_sid, "initiator_sid=%s"}, 1404 {Opt_sa_res_key, "sa_res_key=%s"}, 1405 {Opt_res_holder, "res_holder=%d"}, 1406 {Opt_res_type, "res_type=%d"}, 1407 {Opt_res_scope, "res_scope=%d"}, 1408 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1409 {Opt_mapped_lun, "mapped_lun=%d"}, 1410 {Opt_target_fabric, "target_fabric=%s"}, 1411 {Opt_target_node, "target_node=%s"}, 1412 {Opt_tpgt, "tpgt=%d"}, 1413 {Opt_port_rtpi, "port_rtpi=%d"}, 1414 {Opt_target_lun, "target_lun=%d"}, 1415 {Opt_err, NULL} 1416 }; 1417 1418 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1419 struct se_subsystem_dev *su_dev, 1420 const char *page, 1421 size_t count) 1422 { 1423 struct se_device *dev; 1424 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1425 unsigned char *t_fabric = NULL, *t_port = NULL; 1426 char *orig, *ptr, *arg_p, *opts; 1427 substring_t args[MAX_OPT_ARGS]; 1428 unsigned long long tmp_ll; 1429 u64 sa_res_key = 0; 1430 u32 mapped_lun = 0, target_lun = 0; 1431 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1432 u16 port_rpti = 0, tpgt = 0; 1433 u8 type = 0, scope; 1434 1435 dev = su_dev->se_dev_ptr; 1436 if (!dev) 1437 return -ENODEV; 1438 1439 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1440 return 0; 1441 1442 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1443 pr_debug("Unable to process APTPL metadata while" 1444 " active fabric exports exist\n"); 1445 return -EINVAL; 1446 } 1447 1448 opts = kstrdup(page, GFP_KERNEL); 1449 if (!opts) 1450 return -ENOMEM; 1451 1452 orig = opts; 1453 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1454 if (!*ptr) 1455 continue; 1456 1457 token = match_token(ptr, tokens, args); 1458 switch (token) { 1459 case Opt_initiator_fabric: 1460 i_fabric = match_strdup(&args[0]); 1461 if (!i_fabric) { 1462 ret = -ENOMEM; 1463 goto out; 1464 } 1465 break; 1466 case Opt_initiator_node: 1467 i_port = match_strdup(&args[0]); 1468 if (!i_port) { 1469 ret = -ENOMEM; 1470 goto out; 1471 } 1472 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1473 pr_err("APTPL metadata initiator_node=" 1474 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1475 PR_APTPL_MAX_IPORT_LEN); 1476 ret = -EINVAL; 1477 break; 1478 } 1479 break; 1480 case Opt_initiator_sid: 1481 isid = match_strdup(&args[0]); 1482 if (!isid) { 1483 ret = -ENOMEM; 1484 goto out; 1485 } 1486 if (strlen(isid) >= PR_REG_ISID_LEN) { 1487 pr_err("APTPL metadata initiator_isid" 1488 "= exceeds PR_REG_ISID_LEN: %d\n", 1489 PR_REG_ISID_LEN); 1490 ret = -EINVAL; 1491 break; 1492 } 1493 break; 1494 case Opt_sa_res_key: 1495 arg_p = match_strdup(&args[0]); 1496 if (!arg_p) { 1497 ret = -ENOMEM; 1498 goto out; 1499 } 1500 ret = strict_strtoull(arg_p, 0, &tmp_ll); 1501 if (ret < 0) { 1502 pr_err("strict_strtoull() failed for" 1503 " sa_res_key=\n"); 1504 goto out; 1505 } 1506 sa_res_key = (u64)tmp_ll; 1507 break; 1508 /* 1509 * PR APTPL Metadata for Reservation 1510 */ 1511 case Opt_res_holder: 1512 match_int(args, &arg); 1513 res_holder = arg; 1514 break; 1515 case Opt_res_type: 1516 match_int(args, &arg); 1517 type = (u8)arg; 1518 break; 1519 case Opt_res_scope: 1520 match_int(args, &arg); 1521 scope = (u8)arg; 1522 break; 1523 case Opt_res_all_tg_pt: 1524 match_int(args, &arg); 1525 all_tg_pt = (int)arg; 1526 break; 1527 case Opt_mapped_lun: 1528 match_int(args, &arg); 1529 mapped_lun = (u32)arg; 1530 break; 1531 /* 1532 * PR APTPL Metadata for Target Port 1533 */ 1534 case Opt_target_fabric: 1535 t_fabric = match_strdup(&args[0]); 1536 if (!t_fabric) { 1537 ret = -ENOMEM; 1538 goto out; 1539 } 1540 break; 1541 case Opt_target_node: 1542 t_port = match_strdup(&args[0]); 1543 if (!t_port) { 1544 ret = -ENOMEM; 1545 goto out; 1546 } 1547 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1548 pr_err("APTPL metadata target_node=" 1549 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1550 PR_APTPL_MAX_TPORT_LEN); 1551 ret = -EINVAL; 1552 break; 1553 } 1554 break; 1555 case Opt_tpgt: 1556 match_int(args, &arg); 1557 tpgt = (u16)arg; 1558 break; 1559 case Opt_port_rtpi: 1560 match_int(args, &arg); 1561 port_rpti = (u16)arg; 1562 break; 1563 case Opt_target_lun: 1564 match_int(args, &arg); 1565 target_lun = (u32)arg; 1566 break; 1567 default: 1568 break; 1569 } 1570 } 1571 1572 if (!i_port || !t_port || !sa_res_key) { 1573 pr_err("Illegal parameters for APTPL registration\n"); 1574 ret = -EINVAL; 1575 goto out; 1576 } 1577 1578 if (res_holder && !(type)) { 1579 pr_err("Illegal PR type: 0x%02x for reservation" 1580 " holder\n", type); 1581 ret = -EINVAL; 1582 goto out; 1583 } 1584 1585 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key, 1586 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1587 res_holder, all_tg_pt, type); 1588 out: 1589 kfree(i_fabric); 1590 kfree(i_port); 1591 kfree(isid); 1592 kfree(t_fabric); 1593 kfree(t_port); 1594 kfree(orig); 1595 return (ret == 0) ? count : ret; 1596 } 1597 1598 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1599 1600 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group); 1601 1602 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1603 &target_core_dev_pr_res_holder.attr, 1604 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1605 &target_core_dev_pr_res_pr_generation.attr, 1606 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1607 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1608 &target_core_dev_pr_res_pr_type.attr, 1609 &target_core_dev_pr_res_type.attr, 1610 &target_core_dev_pr_res_aptpl_active.attr, 1611 &target_core_dev_pr_res_aptpl_metadata.attr, 1612 NULL, 1613 }; 1614 1615 static struct configfs_item_operations target_core_dev_pr_ops = { 1616 .show_attribute = target_core_dev_pr_attr_show, 1617 .store_attribute = target_core_dev_pr_attr_store, 1618 }; 1619 1620 static struct config_item_type target_core_dev_pr_cit = { 1621 .ct_item_ops = &target_core_dev_pr_ops, 1622 .ct_attrs = target_core_dev_pr_attrs, 1623 .ct_owner = THIS_MODULE, 1624 }; 1625 1626 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1627 1628 /* Start functions for struct config_item_type target_core_dev_cit */ 1629 1630 static ssize_t target_core_show_dev_info(void *p, char *page) 1631 { 1632 struct se_subsystem_dev *se_dev = p; 1633 struct se_hba *hba = se_dev->se_dev_hba; 1634 struct se_subsystem_api *t = hba->transport; 1635 int bl = 0; 1636 ssize_t read_bytes = 0; 1637 1638 if (!se_dev->se_dev_ptr) 1639 return -ENODEV; 1640 1641 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl); 1642 read_bytes += bl; 1643 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes); 1644 return read_bytes; 1645 } 1646 1647 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1648 .attr = { .ca_owner = THIS_MODULE, 1649 .ca_name = "info", 1650 .ca_mode = S_IRUGO }, 1651 .show = target_core_show_dev_info, 1652 .store = NULL, 1653 }; 1654 1655 static ssize_t target_core_store_dev_control( 1656 void *p, 1657 const char *page, 1658 size_t count) 1659 { 1660 struct se_subsystem_dev *se_dev = p; 1661 struct se_hba *hba = se_dev->se_dev_hba; 1662 struct se_subsystem_api *t = hba->transport; 1663 1664 if (!se_dev->se_dev_su_ptr) { 1665 pr_err("Unable to locate struct se_subsystem_dev>se" 1666 "_dev_su_ptr\n"); 1667 return -EINVAL; 1668 } 1669 1670 return t->set_configfs_dev_params(hba, se_dev, page, count); 1671 } 1672 1673 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1674 .attr = { .ca_owner = THIS_MODULE, 1675 .ca_name = "control", 1676 .ca_mode = S_IWUSR }, 1677 .show = NULL, 1678 .store = target_core_store_dev_control, 1679 }; 1680 1681 static ssize_t target_core_show_dev_alias(void *p, char *page) 1682 { 1683 struct se_subsystem_dev *se_dev = p; 1684 1685 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS)) 1686 return 0; 1687 1688 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias); 1689 } 1690 1691 static ssize_t target_core_store_dev_alias( 1692 void *p, 1693 const char *page, 1694 size_t count) 1695 { 1696 struct se_subsystem_dev *se_dev = p; 1697 struct se_hba *hba = se_dev->se_dev_hba; 1698 ssize_t read_bytes; 1699 1700 if (count > (SE_DEV_ALIAS_LEN-1)) { 1701 pr_err("alias count: %d exceeds" 1702 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1703 SE_DEV_ALIAS_LEN-1); 1704 return -EINVAL; 1705 } 1706 1707 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN, 1708 "%s", page); 1709 if (!read_bytes) 1710 return -EINVAL; 1711 if (se_dev->se_dev_alias[read_bytes - 1] == '\n') 1712 se_dev->se_dev_alias[read_bytes - 1] = '\0'; 1713 1714 se_dev->su_dev_flags |= SDF_USING_ALIAS; 1715 1716 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1717 config_item_name(&hba->hba_group.cg_item), 1718 config_item_name(&se_dev->se_dev_group.cg_item), 1719 se_dev->se_dev_alias); 1720 1721 return read_bytes; 1722 } 1723 1724 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1725 .attr = { .ca_owner = THIS_MODULE, 1726 .ca_name = "alias", 1727 .ca_mode = S_IRUGO | S_IWUSR }, 1728 .show = target_core_show_dev_alias, 1729 .store = target_core_store_dev_alias, 1730 }; 1731 1732 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1733 { 1734 struct se_subsystem_dev *se_dev = p; 1735 1736 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) 1737 return 0; 1738 1739 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path); 1740 } 1741 1742 static ssize_t target_core_store_dev_udev_path( 1743 void *p, 1744 const char *page, 1745 size_t count) 1746 { 1747 struct se_subsystem_dev *se_dev = p; 1748 struct se_hba *hba = se_dev->se_dev_hba; 1749 ssize_t read_bytes; 1750 1751 if (count > (SE_UDEV_PATH_LEN-1)) { 1752 pr_err("udev_path count: %d exceeds" 1753 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1754 SE_UDEV_PATH_LEN-1); 1755 return -EINVAL; 1756 } 1757 1758 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN, 1759 "%s", page); 1760 if (!read_bytes) 1761 return -EINVAL; 1762 if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n') 1763 se_dev->se_dev_udev_path[read_bytes - 1] = '\0'; 1764 1765 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; 1766 1767 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1768 config_item_name(&hba->hba_group.cg_item), 1769 config_item_name(&se_dev->se_dev_group.cg_item), 1770 se_dev->se_dev_udev_path); 1771 1772 return read_bytes; 1773 } 1774 1775 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1776 .attr = { .ca_owner = THIS_MODULE, 1777 .ca_name = "udev_path", 1778 .ca_mode = S_IRUGO | S_IWUSR }, 1779 .show = target_core_show_dev_udev_path, 1780 .store = target_core_store_dev_udev_path, 1781 }; 1782 1783 static ssize_t target_core_store_dev_enable( 1784 void *p, 1785 const char *page, 1786 size_t count) 1787 { 1788 struct se_subsystem_dev *se_dev = p; 1789 struct se_device *dev; 1790 struct se_hba *hba = se_dev->se_dev_hba; 1791 struct se_subsystem_api *t = hba->transport; 1792 char *ptr; 1793 1794 ptr = strstr(page, "1"); 1795 if (!ptr) { 1796 pr_err("For dev_enable ops, only valid value" 1797 " is \"1\"\n"); 1798 return -EINVAL; 1799 } 1800 if (se_dev->se_dev_ptr) { 1801 pr_err("se_dev->se_dev_ptr already set for storage" 1802 " object\n"); 1803 return -EEXIST; 1804 } 1805 1806 if (t->check_configfs_dev_params(hba, se_dev) < 0) 1807 return -EINVAL; 1808 1809 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1810 if (IS_ERR(dev)) 1811 return PTR_ERR(dev); 1812 else if (!dev) 1813 return -EINVAL; 1814 1815 se_dev->se_dev_ptr = dev; 1816 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:" 1817 " %p\n", se_dev->se_dev_ptr); 1818 1819 return count; 1820 } 1821 1822 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1823 .attr = { .ca_owner = THIS_MODULE, 1824 .ca_name = "enable", 1825 .ca_mode = S_IWUSR }, 1826 .show = NULL, 1827 .store = target_core_store_dev_enable, 1828 }; 1829 1830 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1831 { 1832 struct se_device *dev; 1833 struct se_subsystem_dev *su_dev = p; 1834 struct config_item *lu_ci; 1835 struct t10_alua_lu_gp *lu_gp; 1836 struct t10_alua_lu_gp_member *lu_gp_mem; 1837 ssize_t len = 0; 1838 1839 dev = su_dev->se_dev_ptr; 1840 if (!dev) 1841 return -ENODEV; 1842 1843 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) 1844 return len; 1845 1846 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1847 if (!lu_gp_mem) { 1848 pr_err("NULL struct se_device->dev_alua_lu_gp_mem" 1849 " pointer\n"); 1850 return -EINVAL; 1851 } 1852 1853 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1854 lu_gp = lu_gp_mem->lu_gp; 1855 if (lu_gp) { 1856 lu_ci = &lu_gp->lu_gp_group.cg_item; 1857 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1858 config_item_name(lu_ci), lu_gp->lu_gp_id); 1859 } 1860 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1861 1862 return len; 1863 } 1864 1865 static ssize_t target_core_store_alua_lu_gp( 1866 void *p, 1867 const char *page, 1868 size_t count) 1869 { 1870 struct se_device *dev; 1871 struct se_subsystem_dev *su_dev = p; 1872 struct se_hba *hba = su_dev->se_dev_hba; 1873 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1874 struct t10_alua_lu_gp_member *lu_gp_mem; 1875 unsigned char buf[LU_GROUP_NAME_BUF]; 1876 int move = 0; 1877 1878 dev = su_dev->se_dev_ptr; 1879 if (!dev) 1880 return -ENODEV; 1881 1882 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) { 1883 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n", 1884 config_item_name(&hba->hba_group.cg_item), 1885 config_item_name(&su_dev->se_dev_group.cg_item)); 1886 return -EINVAL; 1887 } 1888 if (count > LU_GROUP_NAME_BUF) { 1889 pr_err("ALUA LU Group Alias too large!\n"); 1890 return -EINVAL; 1891 } 1892 memset(buf, 0, LU_GROUP_NAME_BUF); 1893 memcpy(buf, page, count); 1894 /* 1895 * Any ALUA logical unit alias besides "NULL" means we will be 1896 * making a new group association. 1897 */ 1898 if (strcmp(strstrip(buf), "NULL")) { 1899 /* 1900 * core_alua_get_lu_gp_by_name() will increment reference to 1901 * struct t10_alua_lu_gp. This reference is released with 1902 * core_alua_get_lu_gp_by_name below(). 1903 */ 1904 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1905 if (!lu_gp_new) 1906 return -ENODEV; 1907 } 1908 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1909 if (!lu_gp_mem) { 1910 if (lu_gp_new) 1911 core_alua_put_lu_gp_from_name(lu_gp_new); 1912 pr_err("NULL struct se_device->dev_alua_lu_gp_mem" 1913 " pointer\n"); 1914 return -EINVAL; 1915 } 1916 1917 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1918 lu_gp = lu_gp_mem->lu_gp; 1919 if (lu_gp) { 1920 /* 1921 * Clearing an existing lu_gp association, and replacing 1922 * with NULL 1923 */ 1924 if (!lu_gp_new) { 1925 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1926 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1927 " %hu\n", 1928 config_item_name(&hba->hba_group.cg_item), 1929 config_item_name(&su_dev->se_dev_group.cg_item), 1930 config_item_name(&lu_gp->lu_gp_group.cg_item), 1931 lu_gp->lu_gp_id); 1932 1933 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1934 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1935 1936 return count; 1937 } 1938 /* 1939 * Removing existing association of lu_gp_mem with lu_gp 1940 */ 1941 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1942 move = 1; 1943 } 1944 /* 1945 * Associate lu_gp_mem with lu_gp_new. 1946 */ 1947 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1948 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1949 1950 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1951 " core/alua/lu_gps/%s, ID: %hu\n", 1952 (move) ? "Moving" : "Adding", 1953 config_item_name(&hba->hba_group.cg_item), 1954 config_item_name(&su_dev->se_dev_group.cg_item), 1955 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1956 lu_gp_new->lu_gp_id); 1957 1958 core_alua_put_lu_gp_from_name(lu_gp_new); 1959 return count; 1960 } 1961 1962 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1963 .attr = { .ca_owner = THIS_MODULE, 1964 .ca_name = "alua_lu_gp", 1965 .ca_mode = S_IRUGO | S_IWUSR }, 1966 .show = target_core_show_alua_lu_gp, 1967 .store = target_core_store_alua_lu_gp, 1968 }; 1969 1970 static struct configfs_attribute *lio_core_dev_attrs[] = { 1971 &target_core_attr_dev_info.attr, 1972 &target_core_attr_dev_control.attr, 1973 &target_core_attr_dev_alias.attr, 1974 &target_core_attr_dev_udev_path.attr, 1975 &target_core_attr_dev_enable.attr, 1976 &target_core_attr_dev_alua_lu_gp.attr, 1977 NULL, 1978 }; 1979 1980 static void target_core_dev_release(struct config_item *item) 1981 { 1982 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 1983 struct se_subsystem_dev, se_dev_group); 1984 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 1985 struct se_subsystem_api *t = hba->transport; 1986 struct config_group *dev_cg = &se_dev->se_dev_group; 1987 1988 kfree(dev_cg->default_groups); 1989 /* 1990 * This pointer will set when the storage is enabled with: 1991 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable` 1992 */ 1993 if (se_dev->se_dev_ptr) { 1994 pr_debug("Target_Core_ConfigFS: Calling se_free_" 1995 "virtual_device() for se_dev_ptr: %p\n", 1996 se_dev->se_dev_ptr); 1997 1998 se_free_virtual_device(se_dev->se_dev_ptr, hba); 1999 } else { 2000 /* 2001 * Release struct se_subsystem_dev->se_dev_su_ptr.. 2002 */ 2003 pr_debug("Target_Core_ConfigFS: Calling t->free_" 2004 "device() for se_dev_su_ptr: %p\n", 2005 se_dev->se_dev_su_ptr); 2006 2007 t->free_device(se_dev->se_dev_su_ptr); 2008 } 2009 2010 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem" 2011 "_dev_t: %p\n", se_dev); 2012 kfree(se_dev); 2013 } 2014 2015 static ssize_t target_core_dev_show(struct config_item *item, 2016 struct configfs_attribute *attr, 2017 char *page) 2018 { 2019 struct se_subsystem_dev *se_dev = container_of( 2020 to_config_group(item), struct se_subsystem_dev, 2021 se_dev_group); 2022 struct target_core_configfs_attribute *tc_attr = container_of( 2023 attr, struct target_core_configfs_attribute, attr); 2024 2025 if (!tc_attr->show) 2026 return -EINVAL; 2027 2028 return tc_attr->show(se_dev, page); 2029 } 2030 2031 static ssize_t target_core_dev_store(struct config_item *item, 2032 struct configfs_attribute *attr, 2033 const char *page, size_t count) 2034 { 2035 struct se_subsystem_dev *se_dev = container_of( 2036 to_config_group(item), struct se_subsystem_dev, 2037 se_dev_group); 2038 struct target_core_configfs_attribute *tc_attr = container_of( 2039 attr, struct target_core_configfs_attribute, attr); 2040 2041 if (!tc_attr->store) 2042 return -EINVAL; 2043 2044 return tc_attr->store(se_dev, page, count); 2045 } 2046 2047 static struct configfs_item_operations target_core_dev_item_ops = { 2048 .release = target_core_dev_release, 2049 .show_attribute = target_core_dev_show, 2050 .store_attribute = target_core_dev_store, 2051 }; 2052 2053 static struct config_item_type target_core_dev_cit = { 2054 .ct_item_ops = &target_core_dev_item_ops, 2055 .ct_attrs = lio_core_dev_attrs, 2056 .ct_owner = THIS_MODULE, 2057 }; 2058 2059 /* End functions for struct config_item_type target_core_dev_cit */ 2060 2061 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2062 2063 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2064 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2065 static struct target_core_alua_lu_gp_attribute \ 2066 target_core_alua_lu_gp_##_name = \ 2067 __CONFIGFS_EATTR(_name, _mode, \ 2068 target_core_alua_lu_gp_show_attr_##_name, \ 2069 target_core_alua_lu_gp_store_attr_##_name); 2070 2071 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2072 static struct target_core_alua_lu_gp_attribute \ 2073 target_core_alua_lu_gp_##_name = \ 2074 __CONFIGFS_EATTR_RO(_name, \ 2075 target_core_alua_lu_gp_show_attr_##_name); 2076 2077 /* 2078 * lu_gp_id 2079 */ 2080 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2081 struct t10_alua_lu_gp *lu_gp, 2082 char *page) 2083 { 2084 if (!lu_gp->lu_gp_valid_id) 2085 return 0; 2086 2087 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2088 } 2089 2090 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2091 struct t10_alua_lu_gp *lu_gp, 2092 const char *page, 2093 size_t count) 2094 { 2095 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2096 unsigned long lu_gp_id; 2097 int ret; 2098 2099 ret = strict_strtoul(page, 0, &lu_gp_id); 2100 if (ret < 0) { 2101 pr_err("strict_strtoul() returned %d for" 2102 " lu_gp_id\n", ret); 2103 return -EINVAL; 2104 } 2105 if (lu_gp_id > 0x0000ffff) { 2106 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2107 " 0x0000ffff\n", lu_gp_id); 2108 return -EINVAL; 2109 } 2110 2111 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2112 if (ret < 0) 2113 return -EINVAL; 2114 2115 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2116 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2117 config_item_name(&alua_lu_gp_cg->cg_item), 2118 lu_gp->lu_gp_id); 2119 2120 return count; 2121 } 2122 2123 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2124 2125 /* 2126 * members 2127 */ 2128 static ssize_t target_core_alua_lu_gp_show_attr_members( 2129 struct t10_alua_lu_gp *lu_gp, 2130 char *page) 2131 { 2132 struct se_device *dev; 2133 struct se_hba *hba; 2134 struct se_subsystem_dev *su_dev; 2135 struct t10_alua_lu_gp_member *lu_gp_mem; 2136 ssize_t len = 0, cur_len; 2137 unsigned char buf[LU_GROUP_NAME_BUF]; 2138 2139 memset(buf, 0, LU_GROUP_NAME_BUF); 2140 2141 spin_lock(&lu_gp->lu_gp_lock); 2142 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2143 dev = lu_gp_mem->lu_gp_mem_dev; 2144 su_dev = dev->se_sub_dev; 2145 hba = su_dev->se_dev_hba; 2146 2147 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2148 config_item_name(&hba->hba_group.cg_item), 2149 config_item_name(&su_dev->se_dev_group.cg_item)); 2150 cur_len++; /* Extra byte for NULL terminator */ 2151 2152 if ((cur_len + len) > PAGE_SIZE) { 2153 pr_warn("Ran out of lu_gp_show_attr" 2154 "_members buffer\n"); 2155 break; 2156 } 2157 memcpy(page+len, buf, cur_len); 2158 len += cur_len; 2159 } 2160 spin_unlock(&lu_gp->lu_gp_lock); 2161 2162 return len; 2163 } 2164 2165 SE_DEV_ALUA_LU_ATTR_RO(members); 2166 2167 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2168 2169 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2170 &target_core_alua_lu_gp_lu_gp_id.attr, 2171 &target_core_alua_lu_gp_members.attr, 2172 NULL, 2173 }; 2174 2175 static void target_core_alua_lu_gp_release(struct config_item *item) 2176 { 2177 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2178 struct t10_alua_lu_gp, lu_gp_group); 2179 2180 core_alua_free_lu_gp(lu_gp); 2181 } 2182 2183 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2184 .release = target_core_alua_lu_gp_release, 2185 .show_attribute = target_core_alua_lu_gp_attr_show, 2186 .store_attribute = target_core_alua_lu_gp_attr_store, 2187 }; 2188 2189 static struct config_item_type target_core_alua_lu_gp_cit = { 2190 .ct_item_ops = &target_core_alua_lu_gp_ops, 2191 .ct_attrs = target_core_alua_lu_gp_attrs, 2192 .ct_owner = THIS_MODULE, 2193 }; 2194 2195 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2196 2197 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2198 2199 static struct config_group *target_core_alua_create_lu_gp( 2200 struct config_group *group, 2201 const char *name) 2202 { 2203 struct t10_alua_lu_gp *lu_gp; 2204 struct config_group *alua_lu_gp_cg = NULL; 2205 struct config_item *alua_lu_gp_ci = NULL; 2206 2207 lu_gp = core_alua_allocate_lu_gp(name, 0); 2208 if (IS_ERR(lu_gp)) 2209 return NULL; 2210 2211 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2212 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2213 2214 config_group_init_type_name(alua_lu_gp_cg, name, 2215 &target_core_alua_lu_gp_cit); 2216 2217 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2218 " Group: core/alua/lu_gps/%s\n", 2219 config_item_name(alua_lu_gp_ci)); 2220 2221 return alua_lu_gp_cg; 2222 2223 } 2224 2225 static void target_core_alua_drop_lu_gp( 2226 struct config_group *group, 2227 struct config_item *item) 2228 { 2229 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2230 struct t10_alua_lu_gp, lu_gp_group); 2231 2232 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2233 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2234 config_item_name(item), lu_gp->lu_gp_id); 2235 /* 2236 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2237 * -> target_core_alua_lu_gp_release() 2238 */ 2239 config_item_put(item); 2240 } 2241 2242 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2243 .make_group = &target_core_alua_create_lu_gp, 2244 .drop_item = &target_core_alua_drop_lu_gp, 2245 }; 2246 2247 static struct config_item_type target_core_alua_lu_gps_cit = { 2248 .ct_item_ops = NULL, 2249 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2250 .ct_owner = THIS_MODULE, 2251 }; 2252 2253 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2254 2255 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2256 2257 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2258 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2259 static struct target_core_alua_tg_pt_gp_attribute \ 2260 target_core_alua_tg_pt_gp_##_name = \ 2261 __CONFIGFS_EATTR(_name, _mode, \ 2262 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2263 target_core_alua_tg_pt_gp_store_attr_##_name); 2264 2265 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2266 static struct target_core_alua_tg_pt_gp_attribute \ 2267 target_core_alua_tg_pt_gp_##_name = \ 2268 __CONFIGFS_EATTR_RO(_name, \ 2269 target_core_alua_tg_pt_gp_show_attr_##_name); 2270 2271 /* 2272 * alua_access_state 2273 */ 2274 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2275 struct t10_alua_tg_pt_gp *tg_pt_gp, 2276 char *page) 2277 { 2278 return sprintf(page, "%d\n", 2279 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2280 } 2281 2282 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2283 struct t10_alua_tg_pt_gp *tg_pt_gp, 2284 const char *page, 2285 size_t count) 2286 { 2287 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev; 2288 unsigned long tmp; 2289 int new_state, ret; 2290 2291 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2292 pr_err("Unable to do implict ALUA on non valid" 2293 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2294 return -EINVAL; 2295 } 2296 2297 ret = strict_strtoul(page, 0, &tmp); 2298 if (ret < 0) { 2299 pr_err("Unable to extract new ALUA access state from" 2300 " %s\n", page); 2301 return -EINVAL; 2302 } 2303 new_state = (int)tmp; 2304 2305 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { 2306 pr_err("Unable to process implict configfs ALUA" 2307 " transition while TPGS_IMPLICT_ALUA is diabled\n"); 2308 return -EINVAL; 2309 } 2310 2311 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr, 2312 NULL, NULL, new_state, 0); 2313 return (!ret) ? count : -EINVAL; 2314 } 2315 2316 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2317 2318 /* 2319 * alua_access_status 2320 */ 2321 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2322 struct t10_alua_tg_pt_gp *tg_pt_gp, 2323 char *page) 2324 { 2325 return sprintf(page, "%s\n", 2326 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2327 } 2328 2329 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2330 struct t10_alua_tg_pt_gp *tg_pt_gp, 2331 const char *page, 2332 size_t count) 2333 { 2334 unsigned long tmp; 2335 int new_status, ret; 2336 2337 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2338 pr_err("Unable to do set ALUA access status on non" 2339 " valid tg_pt_gp ID: %hu\n", 2340 tg_pt_gp->tg_pt_gp_valid_id); 2341 return -EINVAL; 2342 } 2343 2344 ret = strict_strtoul(page, 0, &tmp); 2345 if (ret < 0) { 2346 pr_err("Unable to extract new ALUA access status" 2347 " from %s\n", page); 2348 return -EINVAL; 2349 } 2350 new_status = (int)tmp; 2351 2352 if ((new_status != ALUA_STATUS_NONE) && 2353 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && 2354 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 2355 pr_err("Illegal ALUA access status: 0x%02x\n", 2356 new_status); 2357 return -EINVAL; 2358 } 2359 2360 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2361 return count; 2362 } 2363 2364 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2365 2366 /* 2367 * alua_access_type 2368 */ 2369 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2370 struct t10_alua_tg_pt_gp *tg_pt_gp, 2371 char *page) 2372 { 2373 return core_alua_show_access_type(tg_pt_gp, page); 2374 } 2375 2376 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2377 struct t10_alua_tg_pt_gp *tg_pt_gp, 2378 const char *page, 2379 size_t count) 2380 { 2381 return core_alua_store_access_type(tg_pt_gp, page, count); 2382 } 2383 2384 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2385 2386 /* 2387 * alua_write_metadata 2388 */ 2389 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2390 struct t10_alua_tg_pt_gp *tg_pt_gp, 2391 char *page) 2392 { 2393 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2394 } 2395 2396 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2397 struct t10_alua_tg_pt_gp *tg_pt_gp, 2398 const char *page, 2399 size_t count) 2400 { 2401 unsigned long tmp; 2402 int ret; 2403 2404 ret = strict_strtoul(page, 0, &tmp); 2405 if (ret < 0) { 2406 pr_err("Unable to extract alua_write_metadata\n"); 2407 return -EINVAL; 2408 } 2409 2410 if ((tmp != 0) && (tmp != 1)) { 2411 pr_err("Illegal value for alua_write_metadata:" 2412 " %lu\n", tmp); 2413 return -EINVAL; 2414 } 2415 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2416 2417 return count; 2418 } 2419 2420 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2421 2422 2423 2424 /* 2425 * nonop_delay_msecs 2426 */ 2427 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2428 struct t10_alua_tg_pt_gp *tg_pt_gp, 2429 char *page) 2430 { 2431 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2432 2433 } 2434 2435 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2436 struct t10_alua_tg_pt_gp *tg_pt_gp, 2437 const char *page, 2438 size_t count) 2439 { 2440 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2441 } 2442 2443 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2444 2445 /* 2446 * trans_delay_msecs 2447 */ 2448 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2449 struct t10_alua_tg_pt_gp *tg_pt_gp, 2450 char *page) 2451 { 2452 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2453 } 2454 2455 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2456 struct t10_alua_tg_pt_gp *tg_pt_gp, 2457 const char *page, 2458 size_t count) 2459 { 2460 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2461 } 2462 2463 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2464 2465 /* 2466 * preferred 2467 */ 2468 2469 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2470 struct t10_alua_tg_pt_gp *tg_pt_gp, 2471 char *page) 2472 { 2473 return core_alua_show_preferred_bit(tg_pt_gp, page); 2474 } 2475 2476 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2477 struct t10_alua_tg_pt_gp *tg_pt_gp, 2478 const char *page, 2479 size_t count) 2480 { 2481 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2482 } 2483 2484 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2485 2486 /* 2487 * tg_pt_gp_id 2488 */ 2489 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2490 struct t10_alua_tg_pt_gp *tg_pt_gp, 2491 char *page) 2492 { 2493 if (!tg_pt_gp->tg_pt_gp_valid_id) 2494 return 0; 2495 2496 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2497 } 2498 2499 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2500 struct t10_alua_tg_pt_gp *tg_pt_gp, 2501 const char *page, 2502 size_t count) 2503 { 2504 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2505 unsigned long tg_pt_gp_id; 2506 int ret; 2507 2508 ret = strict_strtoul(page, 0, &tg_pt_gp_id); 2509 if (ret < 0) { 2510 pr_err("strict_strtoul() returned %d for" 2511 " tg_pt_gp_id\n", ret); 2512 return -EINVAL; 2513 } 2514 if (tg_pt_gp_id > 0x0000ffff) { 2515 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2516 " 0x0000ffff\n", tg_pt_gp_id); 2517 return -EINVAL; 2518 } 2519 2520 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2521 if (ret < 0) 2522 return -EINVAL; 2523 2524 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2525 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2526 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2527 tg_pt_gp->tg_pt_gp_id); 2528 2529 return count; 2530 } 2531 2532 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2533 2534 /* 2535 * members 2536 */ 2537 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2538 struct t10_alua_tg_pt_gp *tg_pt_gp, 2539 char *page) 2540 { 2541 struct se_port *port; 2542 struct se_portal_group *tpg; 2543 struct se_lun *lun; 2544 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2545 ssize_t len = 0, cur_len; 2546 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2547 2548 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2549 2550 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2551 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2552 tg_pt_gp_mem_list) { 2553 port = tg_pt_gp_mem->tg_pt; 2554 tpg = port->sep_tpg; 2555 lun = port->sep_lun; 2556 2557 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2558 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2559 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2560 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2561 config_item_name(&lun->lun_group.cg_item)); 2562 cur_len++; /* Extra byte for NULL terminator */ 2563 2564 if ((cur_len + len) > PAGE_SIZE) { 2565 pr_warn("Ran out of lu_gp_show_attr" 2566 "_members buffer\n"); 2567 break; 2568 } 2569 memcpy(page+len, buf, cur_len); 2570 len += cur_len; 2571 } 2572 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2573 2574 return len; 2575 } 2576 2577 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2578 2579 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2580 tg_pt_gp_group); 2581 2582 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2583 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2584 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2585 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2586 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2587 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2588 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2589 &target_core_alua_tg_pt_gp_preferred.attr, 2590 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2591 &target_core_alua_tg_pt_gp_members.attr, 2592 NULL, 2593 }; 2594 2595 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2596 { 2597 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2598 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2599 2600 core_alua_free_tg_pt_gp(tg_pt_gp); 2601 } 2602 2603 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2604 .release = target_core_alua_tg_pt_gp_release, 2605 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2606 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2607 }; 2608 2609 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2610 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2611 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2612 .ct_owner = THIS_MODULE, 2613 }; 2614 2615 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2616 2617 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2618 2619 static struct config_group *target_core_alua_create_tg_pt_gp( 2620 struct config_group *group, 2621 const char *name) 2622 { 2623 struct t10_alua *alua = container_of(group, struct t10_alua, 2624 alua_tg_pt_gps_group); 2625 struct t10_alua_tg_pt_gp *tg_pt_gp; 2626 struct se_subsystem_dev *su_dev = alua->t10_sub_dev; 2627 struct config_group *alua_tg_pt_gp_cg = NULL; 2628 struct config_item *alua_tg_pt_gp_ci = NULL; 2629 2630 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0); 2631 if (!tg_pt_gp) 2632 return NULL; 2633 2634 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2635 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2636 2637 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2638 &target_core_alua_tg_pt_gp_cit); 2639 2640 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2641 " Group: alua/tg_pt_gps/%s\n", 2642 config_item_name(alua_tg_pt_gp_ci)); 2643 2644 return alua_tg_pt_gp_cg; 2645 } 2646 2647 static void target_core_alua_drop_tg_pt_gp( 2648 struct config_group *group, 2649 struct config_item *item) 2650 { 2651 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2652 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2653 2654 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2655 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2656 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2657 /* 2658 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2659 * -> target_core_alua_tg_pt_gp_release(). 2660 */ 2661 config_item_put(item); 2662 } 2663 2664 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2665 .make_group = &target_core_alua_create_tg_pt_gp, 2666 .drop_item = &target_core_alua_drop_tg_pt_gp, 2667 }; 2668 2669 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2670 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2671 .ct_owner = THIS_MODULE, 2672 }; 2673 2674 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2675 2676 /* Start functions for struct config_item_type target_core_alua_cit */ 2677 2678 /* 2679 * target_core_alua_cit is a ConfigFS group that lives under 2680 * /sys/kernel/config/target/core/alua. There are default groups 2681 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2682 * target_core_alua_cit in target_core_init_configfs() below. 2683 */ 2684 static struct config_item_type target_core_alua_cit = { 2685 .ct_item_ops = NULL, 2686 .ct_attrs = NULL, 2687 .ct_owner = THIS_MODULE, 2688 }; 2689 2690 /* End functions for struct config_item_type target_core_alua_cit */ 2691 2692 /* Start functions for struct config_item_type target_core_stat_cit */ 2693 2694 static struct config_group *target_core_stat_mkdir( 2695 struct config_group *group, 2696 const char *name) 2697 { 2698 return ERR_PTR(-ENOSYS); 2699 } 2700 2701 static void target_core_stat_rmdir( 2702 struct config_group *group, 2703 struct config_item *item) 2704 { 2705 return; 2706 } 2707 2708 static struct configfs_group_operations target_core_stat_group_ops = { 2709 .make_group = &target_core_stat_mkdir, 2710 .drop_item = &target_core_stat_rmdir, 2711 }; 2712 2713 static struct config_item_type target_core_stat_cit = { 2714 .ct_group_ops = &target_core_stat_group_ops, 2715 .ct_owner = THIS_MODULE, 2716 }; 2717 2718 /* End functions for struct config_item_type target_core_stat_cit */ 2719 2720 /* Start functions for struct config_item_type target_core_hba_cit */ 2721 2722 static struct config_group *target_core_make_subdev( 2723 struct config_group *group, 2724 const char *name) 2725 { 2726 struct t10_alua_tg_pt_gp *tg_pt_gp; 2727 struct se_subsystem_dev *se_dev; 2728 struct se_subsystem_api *t; 2729 struct config_item *hba_ci = &group->cg_item; 2730 struct se_hba *hba = item_to_hba(hba_ci); 2731 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2732 struct config_group *dev_stat_grp = NULL; 2733 int errno = -ENOMEM, ret; 2734 2735 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2736 if (ret) 2737 return ERR_PTR(ret); 2738 /* 2739 * Locate the struct se_subsystem_api from parent's struct se_hba. 2740 */ 2741 t = hba->transport; 2742 2743 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 2744 if (!se_dev) { 2745 pr_err("Unable to allocate memory for" 2746 " struct se_subsystem_dev\n"); 2747 goto unlock; 2748 } 2749 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 2750 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 2751 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 2752 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 2753 spin_lock_init(&se_dev->t10_pr.registration_lock); 2754 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 2755 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 2756 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 2757 spin_lock_init(&se_dev->se_dev_lock); 2758 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 2759 se_dev->t10_wwn.t10_sub_dev = se_dev; 2760 se_dev->t10_alua.t10_sub_dev = se_dev; 2761 se_dev->se_dev_attrib.da_sub_dev = se_dev; 2762 2763 se_dev->se_dev_hba = hba; 2764 dev_cg = &se_dev->se_dev_group; 2765 2766 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7, 2767 GFP_KERNEL); 2768 if (!dev_cg->default_groups) 2769 goto out; 2770 /* 2771 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr 2772 * for ->allocate_virtdevice() 2773 * 2774 * se_dev->se_dev_ptr will be set after ->create_virtdev() 2775 * has been called successfully in the next level up in the 2776 * configfs tree for device object's struct config_group. 2777 */ 2778 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name); 2779 if (!se_dev->se_dev_su_ptr) { 2780 pr_err("Unable to locate subsystem dependent pointer" 2781 " from allocate_virtdevice()\n"); 2782 goto out; 2783 } 2784 2785 config_group_init_type_name(&se_dev->se_dev_group, name, 2786 &target_core_dev_cit); 2787 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib", 2788 &target_core_dev_attrib_cit); 2789 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr", 2790 &target_core_dev_pr_cit); 2791 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn", 2792 &target_core_dev_wwn_cit); 2793 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group, 2794 "alua", &target_core_alua_tg_pt_gps_cit); 2795 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group, 2796 "statistics", &target_core_stat_cit); 2797 2798 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group; 2799 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group; 2800 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group; 2801 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group; 2802 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group; 2803 dev_cg->default_groups[5] = NULL; 2804 /* 2805 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2806 */ 2807 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1); 2808 if (!tg_pt_gp) 2809 goto out; 2810 2811 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; 2812 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 2813 GFP_KERNEL); 2814 if (!tg_pt_gp_cg->default_groups) { 2815 pr_err("Unable to allocate tg_pt_gp_cg->" 2816 "default_groups\n"); 2817 goto out; 2818 } 2819 2820 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2821 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2822 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2823 tg_pt_gp_cg->default_groups[1] = NULL; 2824 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2825 /* 2826 * Add core/$HBA/$DEV/statistics/ default groups 2827 */ 2828 dev_stat_grp = &se_dev->dev_stat_grps.stat_group; 2829 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4, 2830 GFP_KERNEL); 2831 if (!dev_stat_grp->default_groups) { 2832 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2833 goto out; 2834 } 2835 target_stat_setup_dev_default_groups(se_dev); 2836 2837 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:" 2838 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr); 2839 2840 mutex_unlock(&hba->hba_access_mutex); 2841 return &se_dev->se_dev_group; 2842 out: 2843 if (se_dev->t10_alua.default_tg_pt_gp) { 2844 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp); 2845 se_dev->t10_alua.default_tg_pt_gp = NULL; 2846 } 2847 if (dev_stat_grp) 2848 kfree(dev_stat_grp->default_groups); 2849 if (tg_pt_gp_cg) 2850 kfree(tg_pt_gp_cg->default_groups); 2851 if (dev_cg) 2852 kfree(dev_cg->default_groups); 2853 if (se_dev->se_dev_su_ptr) 2854 t->free_device(se_dev->se_dev_su_ptr); 2855 kfree(se_dev); 2856 unlock: 2857 mutex_unlock(&hba->hba_access_mutex); 2858 return ERR_PTR(errno); 2859 } 2860 2861 static void target_core_drop_subdev( 2862 struct config_group *group, 2863 struct config_item *item) 2864 { 2865 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 2866 struct se_subsystem_dev, se_dev_group); 2867 struct se_hba *hba; 2868 struct se_subsystem_api *t; 2869 struct config_item *df_item; 2870 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp; 2871 int i; 2872 2873 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 2874 2875 mutex_lock(&hba->hba_access_mutex); 2876 t = hba->transport; 2877 2878 dev_stat_grp = &se_dev->dev_stat_grps.stat_group; 2879 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2880 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2881 dev_stat_grp->default_groups[i] = NULL; 2882 config_item_put(df_item); 2883 } 2884 kfree(dev_stat_grp->default_groups); 2885 2886 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; 2887 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2888 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2889 tg_pt_gp_cg->default_groups[i] = NULL; 2890 config_item_put(df_item); 2891 } 2892 kfree(tg_pt_gp_cg->default_groups); 2893 /* 2894 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2895 * directly from target_core_alua_tg_pt_gp_release(). 2896 */ 2897 se_dev->t10_alua.default_tg_pt_gp = NULL; 2898 2899 dev_cg = &se_dev->se_dev_group; 2900 for (i = 0; dev_cg->default_groups[i]; i++) { 2901 df_item = &dev_cg->default_groups[i]->cg_item; 2902 dev_cg->default_groups[i] = NULL; 2903 config_item_put(df_item); 2904 } 2905 /* 2906 * The releasing of se_dev and associated se_dev->se_dev_ptr is done 2907 * from target_core_dev_item_ops->release() ->target_core_dev_release(). 2908 */ 2909 config_item_put(item); 2910 mutex_unlock(&hba->hba_access_mutex); 2911 } 2912 2913 static struct configfs_group_operations target_core_hba_group_ops = { 2914 .make_group = target_core_make_subdev, 2915 .drop_item = target_core_drop_subdev, 2916 }; 2917 2918 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2919 #define SE_HBA_ATTR(_name, _mode) \ 2920 static struct target_core_hba_attribute \ 2921 target_core_hba_##_name = \ 2922 __CONFIGFS_EATTR(_name, _mode, \ 2923 target_core_hba_show_attr_##_name, \ 2924 target_core_hba_store_attr_##_name); 2925 2926 #define SE_HBA_ATTR_RO(_name) \ 2927 static struct target_core_hba_attribute \ 2928 target_core_hba_##_name = \ 2929 __CONFIGFS_EATTR_RO(_name, \ 2930 target_core_hba_show_attr_##_name); 2931 2932 static ssize_t target_core_hba_show_attr_hba_info( 2933 struct se_hba *hba, 2934 char *page) 2935 { 2936 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2937 hba->hba_id, hba->transport->name, 2938 TARGET_CORE_CONFIGFS_VERSION); 2939 } 2940 2941 SE_HBA_ATTR_RO(hba_info); 2942 2943 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2944 char *page) 2945 { 2946 int hba_mode = 0; 2947 2948 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2949 hba_mode = 1; 2950 2951 return sprintf(page, "%d\n", hba_mode); 2952 } 2953 2954 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2955 const char *page, size_t count) 2956 { 2957 struct se_subsystem_api *transport = hba->transport; 2958 unsigned long mode_flag; 2959 int ret; 2960 2961 if (transport->pmode_enable_hba == NULL) 2962 return -EINVAL; 2963 2964 ret = strict_strtoul(page, 0, &mode_flag); 2965 if (ret < 0) { 2966 pr_err("Unable to extract hba mode flag: %d\n", ret); 2967 return -EINVAL; 2968 } 2969 2970 spin_lock(&hba->device_lock); 2971 if (!list_empty(&hba->hba_dev_list)) { 2972 pr_err("Unable to set hba_mode with active devices\n"); 2973 spin_unlock(&hba->device_lock); 2974 return -EINVAL; 2975 } 2976 spin_unlock(&hba->device_lock); 2977 2978 ret = transport->pmode_enable_hba(hba, mode_flag); 2979 if (ret < 0) 2980 return -EINVAL; 2981 if (ret > 0) 2982 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2983 else if (ret == 0) 2984 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2985 2986 return count; 2987 } 2988 2989 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2990 2991 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2992 2993 static void target_core_hba_release(struct config_item *item) 2994 { 2995 struct se_hba *hba = container_of(to_config_group(item), 2996 struct se_hba, hba_group); 2997 core_delete_hba(hba); 2998 } 2999 3000 static struct configfs_attribute *target_core_hba_attrs[] = { 3001 &target_core_hba_hba_info.attr, 3002 &target_core_hba_hba_mode.attr, 3003 NULL, 3004 }; 3005 3006 static struct configfs_item_operations target_core_hba_item_ops = { 3007 .release = target_core_hba_release, 3008 .show_attribute = target_core_hba_attr_show, 3009 .store_attribute = target_core_hba_attr_store, 3010 }; 3011 3012 static struct config_item_type target_core_hba_cit = { 3013 .ct_item_ops = &target_core_hba_item_ops, 3014 .ct_group_ops = &target_core_hba_group_ops, 3015 .ct_attrs = target_core_hba_attrs, 3016 .ct_owner = THIS_MODULE, 3017 }; 3018 3019 static struct config_group *target_core_call_addhbatotarget( 3020 struct config_group *group, 3021 const char *name) 3022 { 3023 char *se_plugin_str, *str, *str2; 3024 struct se_hba *hba; 3025 char buf[TARGET_CORE_NAME_MAX_LEN]; 3026 unsigned long plugin_dep_id = 0; 3027 int ret; 3028 3029 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3030 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3031 pr_err("Passed *name strlen(): %d exceeds" 3032 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3033 TARGET_CORE_NAME_MAX_LEN); 3034 return ERR_PTR(-ENAMETOOLONG); 3035 } 3036 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3037 3038 str = strstr(buf, "_"); 3039 if (!str) { 3040 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3041 return ERR_PTR(-EINVAL); 3042 } 3043 se_plugin_str = buf; 3044 /* 3045 * Special case for subsystem plugins that have "_" in their names. 3046 * Namely rd_direct and rd_mcp.. 3047 */ 3048 str2 = strstr(str+1, "_"); 3049 if (str2) { 3050 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3051 str2++; /* Skip to start of plugin dependent ID */ 3052 str = str2; 3053 } else { 3054 *str = '\0'; /* Terminate for *se_plugin_str */ 3055 str++; /* Skip to start of plugin dependent ID */ 3056 } 3057 3058 ret = strict_strtoul(str, 0, &plugin_dep_id); 3059 if (ret < 0) { 3060 pr_err("strict_strtoul() returned %d for" 3061 " plugin_dep_id\n", ret); 3062 return ERR_PTR(-EINVAL); 3063 } 3064 /* 3065 * Load up TCM subsystem plugins if they have not already been loaded. 3066 */ 3067 transport_subsystem_check_init(); 3068 3069 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3070 if (IS_ERR(hba)) 3071 return ERR_CAST(hba); 3072 3073 config_group_init_type_name(&hba->hba_group, name, 3074 &target_core_hba_cit); 3075 3076 return &hba->hba_group; 3077 } 3078 3079 static void target_core_call_delhbafromtarget( 3080 struct config_group *group, 3081 struct config_item *item) 3082 { 3083 /* 3084 * core_delete_hba() is called from target_core_hba_item_ops->release() 3085 * -> target_core_hba_release() 3086 */ 3087 config_item_put(item); 3088 } 3089 3090 static struct configfs_group_operations target_core_group_ops = { 3091 .make_group = target_core_call_addhbatotarget, 3092 .drop_item = target_core_call_delhbafromtarget, 3093 }; 3094 3095 static struct config_item_type target_core_cit = { 3096 .ct_item_ops = NULL, 3097 .ct_group_ops = &target_core_group_ops, 3098 .ct_attrs = NULL, 3099 .ct_owner = THIS_MODULE, 3100 }; 3101 3102 /* Stop functions for struct config_item_type target_core_hba_cit */ 3103 3104 static int __init target_core_init_configfs(void) 3105 { 3106 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3107 struct config_group *lu_gp_cg = NULL; 3108 struct configfs_subsystem *subsys; 3109 struct t10_alua_lu_gp *lu_gp; 3110 int ret; 3111 3112 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3113 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3114 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3115 3116 subsys = target_core_subsystem[0]; 3117 config_group_init(&subsys->su_group); 3118 mutex_init(&subsys->su_mutex); 3119 3120 INIT_LIST_HEAD(&g_tf_list); 3121 mutex_init(&g_tf_lock); 3122 ret = init_se_kmem_caches(); 3123 if (ret < 0) 3124 return ret; 3125 /* 3126 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3127 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3128 */ 3129 target_cg = &subsys->su_group; 3130 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3131 GFP_KERNEL); 3132 if (!target_cg->default_groups) { 3133 pr_err("Unable to allocate target_cg->default_groups\n"); 3134 goto out_global; 3135 } 3136 3137 config_group_init_type_name(&target_core_hbagroup, 3138 "core", &target_core_cit); 3139 target_cg->default_groups[0] = &target_core_hbagroup; 3140 target_cg->default_groups[1] = NULL; 3141 /* 3142 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3143 */ 3144 hba_cg = &target_core_hbagroup; 3145 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3146 GFP_KERNEL); 3147 if (!hba_cg->default_groups) { 3148 pr_err("Unable to allocate hba_cg->default_groups\n"); 3149 goto out_global; 3150 } 3151 config_group_init_type_name(&alua_group, 3152 "alua", &target_core_alua_cit); 3153 hba_cg->default_groups[0] = &alua_group; 3154 hba_cg->default_groups[1] = NULL; 3155 /* 3156 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3157 * groups under /sys/kernel/config/target/core/alua/ 3158 */ 3159 alua_cg = &alua_group; 3160 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3161 GFP_KERNEL); 3162 if (!alua_cg->default_groups) { 3163 pr_err("Unable to allocate alua_cg->default_groups\n"); 3164 goto out_global; 3165 } 3166 3167 config_group_init_type_name(&alua_lu_gps_group, 3168 "lu_gps", &target_core_alua_lu_gps_cit); 3169 alua_cg->default_groups[0] = &alua_lu_gps_group; 3170 alua_cg->default_groups[1] = NULL; 3171 /* 3172 * Add core/alua/lu_gps/default_lu_gp 3173 */ 3174 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3175 if (IS_ERR(lu_gp)) 3176 goto out_global; 3177 3178 lu_gp_cg = &alua_lu_gps_group; 3179 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3180 GFP_KERNEL); 3181 if (!lu_gp_cg->default_groups) { 3182 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3183 goto out_global; 3184 } 3185 3186 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3187 &target_core_alua_lu_gp_cit); 3188 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3189 lu_gp_cg->default_groups[1] = NULL; 3190 default_lu_gp = lu_gp; 3191 /* 3192 * Register the target_core_mod subsystem with configfs. 3193 */ 3194 ret = configfs_register_subsystem(subsys); 3195 if (ret < 0) { 3196 pr_err("Error %d while registering subsystem %s\n", 3197 ret, subsys->su_group.cg_item.ci_namebuf); 3198 goto out_global; 3199 } 3200 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3201 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3202 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3203 /* 3204 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3205 */ 3206 ret = rd_module_init(); 3207 if (ret < 0) 3208 goto out; 3209 3210 if (core_dev_setup_virtual_lun0() < 0) 3211 goto out; 3212 3213 return 0; 3214 3215 out: 3216 configfs_unregister_subsystem(subsys); 3217 core_dev_release_virtual_lun0(); 3218 rd_module_exit(); 3219 out_global: 3220 if (default_lu_gp) { 3221 core_alua_free_lu_gp(default_lu_gp); 3222 default_lu_gp = NULL; 3223 } 3224 if (lu_gp_cg) 3225 kfree(lu_gp_cg->default_groups); 3226 if (alua_cg) 3227 kfree(alua_cg->default_groups); 3228 if (hba_cg) 3229 kfree(hba_cg->default_groups); 3230 kfree(target_cg->default_groups); 3231 release_se_kmem_caches(); 3232 return ret; 3233 } 3234 3235 static void __exit target_core_exit_configfs(void) 3236 { 3237 struct configfs_subsystem *subsys; 3238 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3239 struct config_item *item; 3240 int i; 3241 3242 subsys = target_core_subsystem[0]; 3243 3244 lu_gp_cg = &alua_lu_gps_group; 3245 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3246 item = &lu_gp_cg->default_groups[i]->cg_item; 3247 lu_gp_cg->default_groups[i] = NULL; 3248 config_item_put(item); 3249 } 3250 kfree(lu_gp_cg->default_groups); 3251 lu_gp_cg->default_groups = NULL; 3252 3253 alua_cg = &alua_group; 3254 for (i = 0; alua_cg->default_groups[i]; i++) { 3255 item = &alua_cg->default_groups[i]->cg_item; 3256 alua_cg->default_groups[i] = NULL; 3257 config_item_put(item); 3258 } 3259 kfree(alua_cg->default_groups); 3260 alua_cg->default_groups = NULL; 3261 3262 hba_cg = &target_core_hbagroup; 3263 for (i = 0; hba_cg->default_groups[i]; i++) { 3264 item = &hba_cg->default_groups[i]->cg_item; 3265 hba_cg->default_groups[i] = NULL; 3266 config_item_put(item); 3267 } 3268 kfree(hba_cg->default_groups); 3269 hba_cg->default_groups = NULL; 3270 /* 3271 * We expect subsys->su_group.default_groups to be released 3272 * by configfs subsystem provider logic.. 3273 */ 3274 configfs_unregister_subsystem(subsys); 3275 kfree(subsys->su_group.default_groups); 3276 3277 core_alua_free_lu_gp(default_lu_gp); 3278 default_lu_gp = NULL; 3279 3280 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3281 " Infrastructure\n"); 3282 3283 core_dev_release_virtual_lun0(); 3284 rd_module_exit(); 3285 release_se_kmem_caches(); 3286 } 3287 3288 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3289 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3290 MODULE_LICENSE("GPL"); 3291 3292 module_init(target_core_init_configfs); 3293 module_exit(target_core_exit_configfs); 3294