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_device.h> 43 #include <target/target_core_transport.h> 44 #include <target/target_core_fabric_ops.h> 45 #include <target/target_core_fabric_configfs.h> 46 #include <target/target_core_configfs.h> 47 #include <target/configfs_macros.h> 48 49 #include "target_core_alua.h" 50 #include "target_core_hba.h" 51 #include "target_core_pr.h" 52 #include "target_core_rd.h" 53 #include "target_core_stat.h" 54 55 extern struct t10_alua_lu_gp *default_lu_gp; 56 57 static struct list_head g_tf_list; 58 static struct mutex g_tf_lock; 59 60 struct target_core_configfs_attribute { 61 struct configfs_attribute attr; 62 ssize_t (*show)(void *, char *); 63 ssize_t (*store)(void *, const char *, size_t); 64 }; 65 66 static struct config_group target_core_hbagroup; 67 static struct config_group alua_group; 68 static struct config_group alua_lu_gps_group; 69 70 static inline struct se_hba * 71 item_to_hba(struct config_item *item) 72 { 73 return container_of(to_config_group(item), struct se_hba, hba_group); 74 } 75 76 /* 77 * Attributes for /sys/kernel/config/target/ 78 */ 79 static ssize_t target_core_attr_show(struct config_item *item, 80 struct configfs_attribute *attr, 81 char *page) 82 { 83 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 84 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 85 utsname()->sysname, utsname()->machine); 86 } 87 88 static struct configfs_item_operations target_core_fabric_item_ops = { 89 .show_attribute = target_core_attr_show, 90 }; 91 92 static struct configfs_attribute target_core_item_attr_version = { 93 .ca_owner = THIS_MODULE, 94 .ca_name = "version", 95 .ca_mode = S_IRUGO, 96 }; 97 98 static struct target_fabric_configfs *target_core_get_fabric( 99 const char *name) 100 { 101 struct target_fabric_configfs *tf; 102 103 if (!name) 104 return NULL; 105 106 mutex_lock(&g_tf_lock); 107 list_for_each_entry(tf, &g_tf_list, tf_list) { 108 if (!strcmp(tf->tf_name, name)) { 109 atomic_inc(&tf->tf_access_cnt); 110 mutex_unlock(&g_tf_lock); 111 return tf; 112 } 113 } 114 mutex_unlock(&g_tf_lock); 115 116 return NULL; 117 } 118 119 /* 120 * Called from struct target_core_group_ops->make_group() 121 */ 122 static struct config_group *target_core_register_fabric( 123 struct config_group *group, 124 const char *name) 125 { 126 struct target_fabric_configfs *tf; 127 int ret; 128 129 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 130 " %s\n", group, name); 131 /* 132 * Below are some hardcoded request_module() calls to automatically 133 * local fabric modules when the following is called: 134 * 135 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 136 * 137 * Note that this does not limit which TCM fabric module can be 138 * registered, but simply provids auto loading logic for modules with 139 * mkdir(2) system calls with known TCM fabric modules. 140 */ 141 if (!strncmp(name, "iscsi", 5)) { 142 /* 143 * Automatically load the LIO Target fabric module when the 144 * following is called: 145 * 146 * mkdir -p $CONFIGFS/target/iscsi 147 */ 148 ret = request_module("iscsi_target_mod"); 149 if (ret < 0) { 150 pr_err("request_module() failed for" 151 " iscsi_target_mod.ko: %d\n", ret); 152 return ERR_PTR(-EINVAL); 153 } 154 } else if (!strncmp(name, "loopback", 8)) { 155 /* 156 * Automatically load the tcm_loop fabric module when the 157 * following is called: 158 * 159 * mkdir -p $CONFIGFS/target/loopback 160 */ 161 ret = request_module("tcm_loop"); 162 if (ret < 0) { 163 pr_err("request_module() failed for" 164 " tcm_loop.ko: %d\n", ret); 165 return ERR_PTR(-EINVAL); 166 } 167 } 168 169 tf = target_core_get_fabric(name); 170 if (!tf) { 171 pr_err("target_core_get_fabric() failed for %s\n", 172 name); 173 return ERR_PTR(-EINVAL); 174 } 175 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 176 " %s\n", tf->tf_name); 177 /* 178 * On a successful target_core_get_fabric() look, the returned 179 * struct target_fabric_configfs *tf will contain a usage reference. 180 */ 181 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 182 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 183 184 tf->tf_group.default_groups = tf->tf_default_groups; 185 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 186 tf->tf_group.default_groups[1] = NULL; 187 188 config_group_init_type_name(&tf->tf_group, name, 189 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 190 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 191 &TF_CIT_TMPL(tf)->tfc_discovery_cit); 192 193 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 194 " %s\n", tf->tf_group.cg_item.ci_name); 195 /* 196 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 197 */ 198 tf->tf_ops.tf_subsys = tf->tf_subsys; 199 tf->tf_fabric = &tf->tf_group.cg_item; 200 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 201 " for %s\n", name); 202 203 return &tf->tf_group; 204 } 205 206 /* 207 * Called from struct target_core_group_ops->drop_item() 208 */ 209 static void target_core_deregister_fabric( 210 struct config_group *group, 211 struct config_item *item) 212 { 213 struct target_fabric_configfs *tf = container_of( 214 to_config_group(item), struct target_fabric_configfs, tf_group); 215 struct config_group *tf_group; 216 struct config_item *df_item; 217 int i; 218 219 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 220 " tf list\n", config_item_name(item)); 221 222 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 223 " %s\n", tf->tf_name); 224 atomic_dec(&tf->tf_access_cnt); 225 226 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 227 " tf->tf_fabric for %s\n", tf->tf_name); 228 tf->tf_fabric = NULL; 229 230 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 231 " %s\n", config_item_name(item)); 232 233 tf_group = &tf->tf_group; 234 for (i = 0; tf_group->default_groups[i]; i++) { 235 df_item = &tf_group->default_groups[i]->cg_item; 236 tf_group->default_groups[i] = NULL; 237 config_item_put(df_item); 238 } 239 config_item_put(item); 240 } 241 242 static struct configfs_group_operations target_core_fabric_group_ops = { 243 .make_group = &target_core_register_fabric, 244 .drop_item = &target_core_deregister_fabric, 245 }; 246 247 /* 248 * All item attributes appearing in /sys/kernel/target/ appear here. 249 */ 250 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 251 &target_core_item_attr_version, 252 NULL, 253 }; 254 255 /* 256 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 257 */ 258 static struct config_item_type target_core_fabrics_item = { 259 .ct_item_ops = &target_core_fabric_item_ops, 260 .ct_group_ops = &target_core_fabric_group_ops, 261 .ct_attrs = target_core_fabric_item_attrs, 262 .ct_owner = THIS_MODULE, 263 }; 264 265 static struct configfs_subsystem target_core_fabrics = { 266 .su_group = { 267 .cg_item = { 268 .ci_namebuf = "target", 269 .ci_type = &target_core_fabrics_item, 270 }, 271 }, 272 }; 273 274 static struct configfs_subsystem *target_core_subsystem[] = { 275 &target_core_fabrics, 276 NULL, 277 }; 278 279 /*############################################################################## 280 // Start functions called by external Target Fabrics Modules 281 //############################################################################*/ 282 283 /* 284 * First function called by fabric modules to: 285 * 286 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 287 * 2) Add struct target_fabric_configfs to g_tf_list 288 * 3) Return struct target_fabric_configfs to fabric module to be passed 289 * into target_fabric_configfs_register(). 290 */ 291 struct target_fabric_configfs *target_fabric_configfs_init( 292 struct module *fabric_mod, 293 const char *name) 294 { 295 struct target_fabric_configfs *tf; 296 297 if (!(name)) { 298 pr_err("Unable to locate passed fabric name\n"); 299 return ERR_PTR(-EINVAL); 300 } 301 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 302 pr_err("Passed name: %s exceeds TARGET_FABRIC" 303 "_NAME_SIZE\n", name); 304 return ERR_PTR(-EINVAL); 305 } 306 307 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 308 if (!tf) 309 return ERR_PTR(-ENOMEM); 310 311 INIT_LIST_HEAD(&tf->tf_list); 312 atomic_set(&tf->tf_access_cnt, 0); 313 /* 314 * Setup the default generic struct config_item_type's (cits) in 315 * struct target_fabric_configfs->tf_cit_tmpl 316 */ 317 tf->tf_module = fabric_mod; 318 target_fabric_setup_cits(tf); 319 320 tf->tf_subsys = target_core_subsystem[0]; 321 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 322 323 mutex_lock(&g_tf_lock); 324 list_add_tail(&tf->tf_list, &g_tf_list); 325 mutex_unlock(&g_tf_lock); 326 327 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 328 ">>>>>>>>>>>>>>\n"); 329 pr_debug("Initialized struct target_fabric_configfs: %p for" 330 " %s\n", tf, tf->tf_name); 331 return tf; 332 } 333 EXPORT_SYMBOL(target_fabric_configfs_init); 334 335 /* 336 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 337 */ 338 void target_fabric_configfs_free( 339 struct target_fabric_configfs *tf) 340 { 341 mutex_lock(&g_tf_lock); 342 list_del(&tf->tf_list); 343 mutex_unlock(&g_tf_lock); 344 345 kfree(tf); 346 } 347 EXPORT_SYMBOL(target_fabric_configfs_free); 348 349 /* 350 * Perform a sanity check of the passed tf->tf_ops before completing 351 * TCM fabric module registration. 352 */ 353 static int target_fabric_tf_ops_check( 354 struct target_fabric_configfs *tf) 355 { 356 struct target_core_fabric_ops *tfo = &tf->tf_ops; 357 358 if (!tfo->get_fabric_name) { 359 pr_err("Missing tfo->get_fabric_name()\n"); 360 return -EINVAL; 361 } 362 if (!tfo->get_fabric_proto_ident) { 363 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 364 return -EINVAL; 365 } 366 if (!tfo->tpg_get_wwn) { 367 pr_err("Missing tfo->tpg_get_wwn()\n"); 368 return -EINVAL; 369 } 370 if (!tfo->tpg_get_tag) { 371 pr_err("Missing tfo->tpg_get_tag()\n"); 372 return -EINVAL; 373 } 374 if (!tfo->tpg_get_default_depth) { 375 pr_err("Missing tfo->tpg_get_default_depth()\n"); 376 return -EINVAL; 377 } 378 if (!tfo->tpg_get_pr_transport_id) { 379 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 380 return -EINVAL; 381 } 382 if (!tfo->tpg_get_pr_transport_id_len) { 383 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 384 return -EINVAL; 385 } 386 if (!tfo->tpg_check_demo_mode) { 387 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 388 return -EINVAL; 389 } 390 if (!tfo->tpg_check_demo_mode_cache) { 391 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 392 return -EINVAL; 393 } 394 if (!tfo->tpg_check_demo_mode_write_protect) { 395 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 396 return -EINVAL; 397 } 398 if (!tfo->tpg_check_prod_mode_write_protect) { 399 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 400 return -EINVAL; 401 } 402 if (!tfo->tpg_alloc_fabric_acl) { 403 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 404 return -EINVAL; 405 } 406 if (!tfo->tpg_release_fabric_acl) { 407 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 408 return -EINVAL; 409 } 410 if (!tfo->tpg_get_inst_index) { 411 pr_err("Missing tfo->tpg_get_inst_index()\n"); 412 return -EINVAL; 413 } 414 if (!tfo->release_cmd) { 415 pr_err("Missing tfo->release_cmd()\n"); 416 return -EINVAL; 417 } 418 if (!tfo->shutdown_session) { 419 pr_err("Missing tfo->shutdown_session()\n"); 420 return -EINVAL; 421 } 422 if (!tfo->close_session) { 423 pr_err("Missing tfo->close_session()\n"); 424 return -EINVAL; 425 } 426 if (!tfo->stop_session) { 427 pr_err("Missing tfo->stop_session()\n"); 428 return -EINVAL; 429 } 430 if (!tfo->fall_back_to_erl0) { 431 pr_err("Missing tfo->fall_back_to_erl0()\n"); 432 return -EINVAL; 433 } 434 if (!tfo->sess_logged_in) { 435 pr_err("Missing tfo->sess_logged_in()\n"); 436 return -EINVAL; 437 } 438 if (!tfo->sess_get_index) { 439 pr_err("Missing tfo->sess_get_index()\n"); 440 return -EINVAL; 441 } 442 if (!tfo->write_pending) { 443 pr_err("Missing tfo->write_pending()\n"); 444 return -EINVAL; 445 } 446 if (!tfo->write_pending_status) { 447 pr_err("Missing tfo->write_pending_status()\n"); 448 return -EINVAL; 449 } 450 if (!tfo->set_default_node_attributes) { 451 pr_err("Missing tfo->set_default_node_attributes()\n"); 452 return -EINVAL; 453 } 454 if (!tfo->get_task_tag) { 455 pr_err("Missing tfo->get_task_tag()\n"); 456 return -EINVAL; 457 } 458 if (!tfo->get_cmd_state) { 459 pr_err("Missing tfo->get_cmd_state()\n"); 460 return -EINVAL; 461 } 462 if (!tfo->queue_data_in) { 463 pr_err("Missing tfo->queue_data_in()\n"); 464 return -EINVAL; 465 } 466 if (!tfo->queue_status) { 467 pr_err("Missing tfo->queue_status()\n"); 468 return -EINVAL; 469 } 470 if (!tfo->queue_tm_rsp) { 471 pr_err("Missing tfo->queue_tm_rsp()\n"); 472 return -EINVAL; 473 } 474 if (!tfo->set_fabric_sense_len) { 475 pr_err("Missing tfo->set_fabric_sense_len()\n"); 476 return -EINVAL; 477 } 478 if (!tfo->get_fabric_sense_len) { 479 pr_err("Missing tfo->get_fabric_sense_len()\n"); 480 return -EINVAL; 481 } 482 if (!tfo->is_state_remove) { 483 pr_err("Missing tfo->is_state_remove()\n"); 484 return -EINVAL; 485 } 486 /* 487 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 488 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 489 * target_core_fabric_configfs.c WWN+TPG group context code. 490 */ 491 if (!tfo->fabric_make_wwn) { 492 pr_err("Missing tfo->fabric_make_wwn()\n"); 493 return -EINVAL; 494 } 495 if (!tfo->fabric_drop_wwn) { 496 pr_err("Missing tfo->fabric_drop_wwn()\n"); 497 return -EINVAL; 498 } 499 if (!tfo->fabric_make_tpg) { 500 pr_err("Missing tfo->fabric_make_tpg()\n"); 501 return -EINVAL; 502 } 503 if (!tfo->fabric_drop_tpg) { 504 pr_err("Missing tfo->fabric_drop_tpg()\n"); 505 return -EINVAL; 506 } 507 508 return 0; 509 } 510 511 /* 512 * Called 2nd from fabric module with returned parameter of 513 * struct target_fabric_configfs * from target_fabric_configfs_init(). 514 * 515 * Upon a successful registration, the new fabric's struct config_item is 516 * return. Also, a pointer to this struct is set in the passed 517 * struct target_fabric_configfs. 518 */ 519 int target_fabric_configfs_register( 520 struct target_fabric_configfs *tf) 521 { 522 int ret; 523 524 if (!tf) { 525 pr_err("Unable to locate target_fabric_configfs" 526 " pointer\n"); 527 return -EINVAL; 528 } 529 if (!tf->tf_subsys) { 530 pr_err("Unable to target struct config_subsystem" 531 " pointer\n"); 532 return -EINVAL; 533 } 534 ret = target_fabric_tf_ops_check(tf); 535 if (ret < 0) 536 return ret; 537 538 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 539 ">>>>>>>>>>\n"); 540 return 0; 541 } 542 EXPORT_SYMBOL(target_fabric_configfs_register); 543 544 void target_fabric_configfs_deregister( 545 struct target_fabric_configfs *tf) 546 { 547 struct configfs_subsystem *su; 548 549 if (!tf) { 550 pr_err("Unable to locate passed target_fabric_" 551 "configfs\n"); 552 return; 553 } 554 su = tf->tf_subsys; 555 if (!su) { 556 pr_err("Unable to locate passed tf->tf_subsys" 557 " pointer\n"); 558 return; 559 } 560 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 561 ">>>>>>>>>>>>\n"); 562 mutex_lock(&g_tf_lock); 563 if (atomic_read(&tf->tf_access_cnt)) { 564 mutex_unlock(&g_tf_lock); 565 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 566 tf->tf_name); 567 BUG(); 568 } 569 list_del(&tf->tf_list); 570 mutex_unlock(&g_tf_lock); 571 572 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 573 " %s\n", tf->tf_name); 574 tf->tf_module = NULL; 575 tf->tf_subsys = NULL; 576 kfree(tf); 577 578 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 579 ">>>>>\n"); 580 } 581 EXPORT_SYMBOL(target_fabric_configfs_deregister); 582 583 /*############################################################################## 584 // Stop functions called by external Target Fabrics Modules 585 //############################################################################*/ 586 587 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 588 589 #define DEF_DEV_ATTRIB_SHOW(_name) \ 590 static ssize_t target_core_dev_show_attr_##_name( \ 591 struct se_dev_attrib *da, \ 592 char *page) \ 593 { \ 594 struct se_device *dev; \ 595 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 596 ssize_t rb; \ 597 \ 598 spin_lock(&se_dev->se_dev_lock); \ 599 dev = se_dev->se_dev_ptr; \ 600 if (!dev) { \ 601 spin_unlock(&se_dev->se_dev_lock); \ 602 return -ENODEV; \ 603 } \ 604 rb = snprintf(page, PAGE_SIZE, "%u\n", \ 605 (u32)dev->se_sub_dev->se_dev_attrib._name); \ 606 spin_unlock(&se_dev->se_dev_lock); \ 607 \ 608 return rb; \ 609 } 610 611 #define DEF_DEV_ATTRIB_STORE(_name) \ 612 static ssize_t target_core_dev_store_attr_##_name( \ 613 struct se_dev_attrib *da, \ 614 const char *page, \ 615 size_t count) \ 616 { \ 617 struct se_device *dev; \ 618 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 619 unsigned long val; \ 620 int ret; \ 621 \ 622 spin_lock(&se_dev->se_dev_lock); \ 623 dev = se_dev->se_dev_ptr; \ 624 if (!dev) { \ 625 spin_unlock(&se_dev->se_dev_lock); \ 626 return -ENODEV; \ 627 } \ 628 ret = strict_strtoul(page, 0, &val); \ 629 if (ret < 0) { \ 630 spin_unlock(&se_dev->se_dev_lock); \ 631 pr_err("strict_strtoul() failed with" \ 632 " ret: %d\n", ret); \ 633 return -EINVAL; \ 634 } \ 635 ret = se_dev_set_##_name(dev, (u32)val); \ 636 spin_unlock(&se_dev->se_dev_lock); \ 637 \ 638 return (!ret) ? count : -EINVAL; \ 639 } 640 641 #define DEF_DEV_ATTRIB(_name) \ 642 DEF_DEV_ATTRIB_SHOW(_name); \ 643 DEF_DEV_ATTRIB_STORE(_name); 644 645 #define DEF_DEV_ATTRIB_RO(_name) \ 646 DEF_DEV_ATTRIB_SHOW(_name); 647 648 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 649 #define SE_DEV_ATTR(_name, _mode) \ 650 static struct target_core_dev_attrib_attribute \ 651 target_core_dev_attrib_##_name = \ 652 __CONFIGFS_EATTR(_name, _mode, \ 653 target_core_dev_show_attr_##_name, \ 654 target_core_dev_store_attr_##_name); 655 656 #define SE_DEV_ATTR_RO(_name); \ 657 static struct target_core_dev_attrib_attribute \ 658 target_core_dev_attrib_##_name = \ 659 __CONFIGFS_EATTR_RO(_name, \ 660 target_core_dev_show_attr_##_name); 661 662 DEF_DEV_ATTRIB(emulate_dpo); 663 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 664 665 DEF_DEV_ATTRIB(emulate_fua_write); 666 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 667 668 DEF_DEV_ATTRIB(emulate_fua_read); 669 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 670 671 DEF_DEV_ATTRIB(emulate_write_cache); 672 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 673 674 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 675 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 676 677 DEF_DEV_ATTRIB(emulate_tas); 678 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 679 680 DEF_DEV_ATTRIB(emulate_tpu); 681 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 682 683 DEF_DEV_ATTRIB(emulate_tpws); 684 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 685 686 DEF_DEV_ATTRIB(enforce_pr_isids); 687 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 688 689 DEF_DEV_ATTRIB(is_nonrot); 690 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 691 692 DEF_DEV_ATTRIB(emulate_rest_reord); 693 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 694 695 DEF_DEV_ATTRIB_RO(hw_block_size); 696 SE_DEV_ATTR_RO(hw_block_size); 697 698 DEF_DEV_ATTRIB(block_size); 699 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 700 701 DEF_DEV_ATTRIB_RO(hw_max_sectors); 702 SE_DEV_ATTR_RO(hw_max_sectors); 703 704 DEF_DEV_ATTRIB(max_sectors); 705 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR); 706 707 DEF_DEV_ATTRIB(optimal_sectors); 708 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 709 710 DEF_DEV_ATTRIB_RO(hw_queue_depth); 711 SE_DEV_ATTR_RO(hw_queue_depth); 712 713 DEF_DEV_ATTRIB(queue_depth); 714 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 715 716 DEF_DEV_ATTRIB(max_unmap_lba_count); 717 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 718 719 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 720 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 721 722 DEF_DEV_ATTRIB(unmap_granularity); 723 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 724 725 DEF_DEV_ATTRIB(unmap_granularity_alignment); 726 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 727 728 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 729 730 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 731 &target_core_dev_attrib_emulate_dpo.attr, 732 &target_core_dev_attrib_emulate_fua_write.attr, 733 &target_core_dev_attrib_emulate_fua_read.attr, 734 &target_core_dev_attrib_emulate_write_cache.attr, 735 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 736 &target_core_dev_attrib_emulate_tas.attr, 737 &target_core_dev_attrib_emulate_tpu.attr, 738 &target_core_dev_attrib_emulate_tpws.attr, 739 &target_core_dev_attrib_enforce_pr_isids.attr, 740 &target_core_dev_attrib_is_nonrot.attr, 741 &target_core_dev_attrib_emulate_rest_reord.attr, 742 &target_core_dev_attrib_hw_block_size.attr, 743 &target_core_dev_attrib_block_size.attr, 744 &target_core_dev_attrib_hw_max_sectors.attr, 745 &target_core_dev_attrib_max_sectors.attr, 746 &target_core_dev_attrib_optimal_sectors.attr, 747 &target_core_dev_attrib_hw_queue_depth.attr, 748 &target_core_dev_attrib_queue_depth.attr, 749 &target_core_dev_attrib_max_unmap_lba_count.attr, 750 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 751 &target_core_dev_attrib_unmap_granularity.attr, 752 &target_core_dev_attrib_unmap_granularity_alignment.attr, 753 NULL, 754 }; 755 756 static struct configfs_item_operations target_core_dev_attrib_ops = { 757 .show_attribute = target_core_dev_attrib_attr_show, 758 .store_attribute = target_core_dev_attrib_attr_store, 759 }; 760 761 static struct config_item_type target_core_dev_attrib_cit = { 762 .ct_item_ops = &target_core_dev_attrib_ops, 763 .ct_attrs = target_core_dev_attrib_attrs, 764 .ct_owner = THIS_MODULE, 765 }; 766 767 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 768 769 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 770 771 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 772 #define SE_DEV_WWN_ATTR(_name, _mode) \ 773 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 774 __CONFIGFS_EATTR(_name, _mode, \ 775 target_core_dev_wwn_show_attr_##_name, \ 776 target_core_dev_wwn_store_attr_##_name); 777 778 #define SE_DEV_WWN_ATTR_RO(_name); \ 779 do { \ 780 static struct target_core_dev_wwn_attribute \ 781 target_core_dev_wwn_##_name = \ 782 __CONFIGFS_EATTR_RO(_name, \ 783 target_core_dev_wwn_show_attr_##_name); \ 784 } while (0); 785 786 /* 787 * VPD page 0x80 Unit serial 788 */ 789 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 790 struct t10_wwn *t10_wwn, 791 char *page) 792 { 793 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 794 struct se_device *dev; 795 796 dev = se_dev->se_dev_ptr; 797 if (!dev) 798 return -ENODEV; 799 800 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 801 &t10_wwn->unit_serial[0]); 802 } 803 804 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 805 struct t10_wwn *t10_wwn, 806 const char *page, 807 size_t count) 808 { 809 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev; 810 struct se_device *dev; 811 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 812 813 /* 814 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 815 * from the struct scsi_device level firmware, do not allow 816 * VPD Unit Serial to be emulated. 817 * 818 * Note this struct scsi_device could also be emulating VPD 819 * information from its drivers/scsi LLD. But for now we assume 820 * it is doing 'the right thing' wrt a world wide unique 821 * VPD Unit Serial Number that OS dependent multipath can depend on. 822 */ 823 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) { 824 pr_err("Underlying SCSI device firmware provided VPD" 825 " Unit Serial, ignoring request\n"); 826 return -EOPNOTSUPP; 827 } 828 829 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 830 pr_err("Emulated VPD Unit Serial exceeds" 831 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 832 return -EOVERFLOW; 833 } 834 /* 835 * Check to see if any active $FABRIC_MOD exports exist. If they 836 * do exist, fail here as changing this information on the fly 837 * (underneath the initiator side OS dependent multipath code) 838 * could cause negative effects. 839 */ 840 dev = su_dev->se_dev_ptr; 841 if (dev) { 842 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 843 pr_err("Unable to set VPD Unit Serial while" 844 " active %d $FABRIC_MOD exports exist\n", 845 atomic_read(&dev->dev_export_obj.obj_access_count)); 846 return -EINVAL; 847 } 848 } 849 /* 850 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 851 * 852 * Also, strip any newline added from the userspace 853 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 854 */ 855 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 856 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 857 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 858 "%s", strstrip(buf)); 859 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL; 860 861 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 862 " %s\n", su_dev->t10_wwn.unit_serial); 863 864 return count; 865 } 866 867 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 868 869 /* 870 * VPD page 0x83 Protocol Identifier 871 */ 872 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 873 struct t10_wwn *t10_wwn, 874 char *page) 875 { 876 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 877 struct se_device *dev; 878 struct t10_vpd *vpd; 879 unsigned char buf[VPD_TMP_BUF_SIZE]; 880 ssize_t len = 0; 881 882 dev = se_dev->se_dev_ptr; 883 if (!dev) 884 return -ENODEV; 885 886 memset(buf, 0, VPD_TMP_BUF_SIZE); 887 888 spin_lock(&t10_wwn->t10_vpd_lock); 889 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 890 if (!vpd->protocol_identifier_set) 891 continue; 892 893 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 894 895 if (len + strlen(buf) >= PAGE_SIZE) 896 break; 897 898 len += sprintf(page+len, "%s", buf); 899 } 900 spin_unlock(&t10_wwn->t10_vpd_lock); 901 902 return len; 903 } 904 905 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 906 struct t10_wwn *t10_wwn, 907 const char *page, 908 size_t count) 909 { 910 return -ENOSYS; 911 } 912 913 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 914 915 /* 916 * Generic wrapper for dumping VPD identifiers by association. 917 */ 918 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 919 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 920 struct t10_wwn *t10_wwn, \ 921 char *page) \ 922 { \ 923 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \ 924 struct se_device *dev; \ 925 struct t10_vpd *vpd; \ 926 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 927 ssize_t len = 0; \ 928 \ 929 dev = se_dev->se_dev_ptr; \ 930 if (!dev) \ 931 return -ENODEV; \ 932 \ 933 spin_lock(&t10_wwn->t10_vpd_lock); \ 934 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 935 if (vpd->association != _assoc) \ 936 continue; \ 937 \ 938 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 939 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 940 if (len + strlen(buf) >= PAGE_SIZE) \ 941 break; \ 942 len += sprintf(page+len, "%s", buf); \ 943 \ 944 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 945 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 946 if (len + strlen(buf) >= PAGE_SIZE) \ 947 break; \ 948 len += sprintf(page+len, "%s", buf); \ 949 \ 950 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 951 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 952 if (len + strlen(buf) >= PAGE_SIZE) \ 953 break; \ 954 len += sprintf(page+len, "%s", buf); \ 955 } \ 956 spin_unlock(&t10_wwn->t10_vpd_lock); \ 957 \ 958 return len; \ 959 } 960 961 /* 962 * VPD page 0x83 Association: Logical Unit 963 */ 964 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 965 966 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 967 struct t10_wwn *t10_wwn, 968 const char *page, 969 size_t count) 970 { 971 return -ENOSYS; 972 } 973 974 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 975 976 /* 977 * VPD page 0x83 Association: Target Port 978 */ 979 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 980 981 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 982 struct t10_wwn *t10_wwn, 983 const char *page, 984 size_t count) 985 { 986 return -ENOSYS; 987 } 988 989 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 990 991 /* 992 * VPD page 0x83 Association: SCSI Target Device 993 */ 994 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 995 996 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 997 struct t10_wwn *t10_wwn, 998 const char *page, 999 size_t count) 1000 { 1001 return -ENOSYS; 1002 } 1003 1004 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 1005 1006 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 1007 1008 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1009 &target_core_dev_wwn_vpd_unit_serial.attr, 1010 &target_core_dev_wwn_vpd_protocol_identifier.attr, 1011 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 1012 &target_core_dev_wwn_vpd_assoc_target_port.attr, 1013 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 1014 NULL, 1015 }; 1016 1017 static struct configfs_item_operations target_core_dev_wwn_ops = { 1018 .show_attribute = target_core_dev_wwn_attr_show, 1019 .store_attribute = target_core_dev_wwn_attr_store, 1020 }; 1021 1022 static struct config_item_type target_core_dev_wwn_cit = { 1023 .ct_item_ops = &target_core_dev_wwn_ops, 1024 .ct_attrs = target_core_dev_wwn_attrs, 1025 .ct_owner = THIS_MODULE, 1026 }; 1027 1028 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 1029 1030 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 1031 1032 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev); 1033 #define SE_DEV_PR_ATTR(_name, _mode) \ 1034 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1035 __CONFIGFS_EATTR(_name, _mode, \ 1036 target_core_dev_pr_show_attr_##_name, \ 1037 target_core_dev_pr_store_attr_##_name); 1038 1039 #define SE_DEV_PR_ATTR_RO(_name); \ 1040 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1041 __CONFIGFS_EATTR_RO(_name, \ 1042 target_core_dev_pr_show_attr_##_name); 1043 1044 /* 1045 * res_holder 1046 */ 1047 static ssize_t target_core_dev_pr_show_spc3_res( 1048 struct se_device *dev, 1049 char *page, 1050 ssize_t *len) 1051 { 1052 struct se_node_acl *se_nacl; 1053 struct t10_pr_registration *pr_reg; 1054 char i_buf[PR_REG_ISID_ID_LEN]; 1055 int prf_isid; 1056 1057 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1058 1059 spin_lock(&dev->dev_reservation_lock); 1060 pr_reg = dev->dev_pr_res_holder; 1061 if (!pr_reg) { 1062 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n"); 1063 spin_unlock(&dev->dev_reservation_lock); 1064 return *len; 1065 } 1066 se_nacl = pr_reg->pr_reg_nacl; 1067 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1068 PR_REG_ISID_ID_LEN); 1069 1070 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n", 1071 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1072 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 1073 spin_unlock(&dev->dev_reservation_lock); 1074 1075 return *len; 1076 } 1077 1078 static ssize_t target_core_dev_pr_show_spc2_res( 1079 struct se_device *dev, 1080 char *page, 1081 ssize_t *len) 1082 { 1083 struct se_node_acl *se_nacl; 1084 1085 spin_lock(&dev->dev_reservation_lock); 1086 se_nacl = dev->dev_reserved_node_acl; 1087 if (!se_nacl) { 1088 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n"); 1089 spin_unlock(&dev->dev_reservation_lock); 1090 return *len; 1091 } 1092 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n", 1093 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1094 se_nacl->initiatorname); 1095 spin_unlock(&dev->dev_reservation_lock); 1096 1097 return *len; 1098 } 1099 1100 static ssize_t target_core_dev_pr_show_attr_res_holder( 1101 struct se_subsystem_dev *su_dev, 1102 char *page) 1103 { 1104 ssize_t len = 0; 1105 1106 if (!su_dev->se_dev_ptr) 1107 return -ENODEV; 1108 1109 switch (su_dev->t10_pr.res_type) { 1110 case SPC3_PERSISTENT_RESERVATIONS: 1111 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr, 1112 page, &len); 1113 break; 1114 case SPC2_RESERVATIONS: 1115 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr, 1116 page, &len); 1117 break; 1118 case SPC_PASSTHROUGH: 1119 len += sprintf(page+len, "Passthrough\n"); 1120 break; 1121 default: 1122 len += sprintf(page+len, "Unknown\n"); 1123 break; 1124 } 1125 1126 return len; 1127 } 1128 1129 SE_DEV_PR_ATTR_RO(res_holder); 1130 1131 /* 1132 * res_pr_all_tgt_pts 1133 */ 1134 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1135 struct se_subsystem_dev *su_dev, 1136 char *page) 1137 { 1138 struct se_device *dev; 1139 struct t10_pr_registration *pr_reg; 1140 ssize_t len = 0; 1141 1142 dev = su_dev->se_dev_ptr; 1143 if (!dev) 1144 return -ENODEV; 1145 1146 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1147 return len; 1148 1149 spin_lock(&dev->dev_reservation_lock); 1150 pr_reg = dev->dev_pr_res_holder; 1151 if (!pr_reg) { 1152 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1153 spin_unlock(&dev->dev_reservation_lock); 1154 return len; 1155 } 1156 /* 1157 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3 1158 * Basic PERSISTENT RESERVER OUT parameter list, page 290 1159 */ 1160 if (pr_reg->pr_reg_all_tg_pt) 1161 len = sprintf(page, "SPC-3 Reservation: All Target" 1162 " Ports registration\n"); 1163 else 1164 len = sprintf(page, "SPC-3 Reservation: Single" 1165 " Target Port registration\n"); 1166 spin_unlock(&dev->dev_reservation_lock); 1167 1168 return len; 1169 } 1170 1171 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1172 1173 /* 1174 * res_pr_generation 1175 */ 1176 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1177 struct se_subsystem_dev *su_dev, 1178 char *page) 1179 { 1180 if (!su_dev->se_dev_ptr) 1181 return -ENODEV; 1182 1183 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1184 return 0; 1185 1186 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation); 1187 } 1188 1189 SE_DEV_PR_ATTR_RO(res_pr_generation); 1190 1191 /* 1192 * res_pr_holder_tg_port 1193 */ 1194 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1195 struct se_subsystem_dev *su_dev, 1196 char *page) 1197 { 1198 struct se_device *dev; 1199 struct se_node_acl *se_nacl; 1200 struct se_lun *lun; 1201 struct se_portal_group *se_tpg; 1202 struct t10_pr_registration *pr_reg; 1203 struct target_core_fabric_ops *tfo; 1204 ssize_t len = 0; 1205 1206 dev = su_dev->se_dev_ptr; 1207 if (!dev) 1208 return -ENODEV; 1209 1210 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1211 return len; 1212 1213 spin_lock(&dev->dev_reservation_lock); 1214 pr_reg = dev->dev_pr_res_holder; 1215 if (!pr_reg) { 1216 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1217 spin_unlock(&dev->dev_reservation_lock); 1218 return len; 1219 } 1220 se_nacl = pr_reg->pr_reg_nacl; 1221 se_tpg = se_nacl->se_tpg; 1222 lun = pr_reg->pr_reg_tg_pt_lun; 1223 tfo = se_tpg->se_tpg_tfo; 1224 1225 len += sprintf(page+len, "SPC-3 Reservation: %s" 1226 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1227 tfo->tpg_get_wwn(se_tpg)); 1228 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1229 " Identifer Tag: %hu %s Portal Group Tag: %hu" 1230 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1231 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1232 tfo->get_fabric_name(), lun->unpacked_lun); 1233 spin_unlock(&dev->dev_reservation_lock); 1234 1235 return len; 1236 } 1237 1238 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1239 1240 /* 1241 * res_pr_registered_i_pts 1242 */ 1243 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1244 struct se_subsystem_dev *su_dev, 1245 char *page) 1246 { 1247 struct target_core_fabric_ops *tfo; 1248 struct t10_pr_registration *pr_reg; 1249 unsigned char buf[384]; 1250 char i_buf[PR_REG_ISID_ID_LEN]; 1251 ssize_t len = 0; 1252 int reg_count = 0, prf_isid; 1253 1254 if (!su_dev->se_dev_ptr) 1255 return -ENODEV; 1256 1257 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1258 return len; 1259 1260 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1261 1262 spin_lock(&su_dev->t10_pr.registration_lock); 1263 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, 1264 pr_reg_list) { 1265 1266 memset(buf, 0, 384); 1267 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1268 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1269 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1270 PR_REG_ISID_ID_LEN); 1271 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1272 tfo->get_fabric_name(), 1273 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ? 1274 &i_buf[0] : "", pr_reg->pr_res_key, 1275 pr_reg->pr_res_generation); 1276 1277 if (len + strlen(buf) >= PAGE_SIZE) 1278 break; 1279 1280 len += sprintf(page+len, "%s", buf); 1281 reg_count++; 1282 } 1283 spin_unlock(&su_dev->t10_pr.registration_lock); 1284 1285 if (!reg_count) 1286 len += sprintf(page+len, "None\n"); 1287 1288 return len; 1289 } 1290 1291 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1292 1293 /* 1294 * res_pr_type 1295 */ 1296 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1297 struct se_subsystem_dev *su_dev, 1298 char *page) 1299 { 1300 struct se_device *dev; 1301 struct t10_pr_registration *pr_reg; 1302 ssize_t len = 0; 1303 1304 dev = su_dev->se_dev_ptr; 1305 if (!dev) 1306 return -ENODEV; 1307 1308 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1309 return len; 1310 1311 spin_lock(&dev->dev_reservation_lock); 1312 pr_reg = dev->dev_pr_res_holder; 1313 if (!pr_reg) { 1314 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1315 spin_unlock(&dev->dev_reservation_lock); 1316 return len; 1317 } 1318 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1319 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1320 spin_unlock(&dev->dev_reservation_lock); 1321 1322 return len; 1323 } 1324 1325 SE_DEV_PR_ATTR_RO(res_pr_type); 1326 1327 /* 1328 * res_type 1329 */ 1330 static ssize_t target_core_dev_pr_show_attr_res_type( 1331 struct se_subsystem_dev *su_dev, 1332 char *page) 1333 { 1334 ssize_t len = 0; 1335 1336 if (!su_dev->se_dev_ptr) 1337 return -ENODEV; 1338 1339 switch (su_dev->t10_pr.res_type) { 1340 case SPC3_PERSISTENT_RESERVATIONS: 1341 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1342 break; 1343 case SPC2_RESERVATIONS: 1344 len = sprintf(page, "SPC2_RESERVATIONS\n"); 1345 break; 1346 case SPC_PASSTHROUGH: 1347 len = sprintf(page, "SPC_PASSTHROUGH\n"); 1348 break; 1349 default: 1350 len = sprintf(page, "UNKNOWN\n"); 1351 break; 1352 } 1353 1354 return len; 1355 } 1356 1357 SE_DEV_PR_ATTR_RO(res_type); 1358 1359 /* 1360 * res_aptpl_active 1361 */ 1362 1363 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1364 struct se_subsystem_dev *su_dev, 1365 char *page) 1366 { 1367 if (!su_dev->se_dev_ptr) 1368 return -ENODEV; 1369 1370 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1371 return 0; 1372 1373 return sprintf(page, "APTPL Bit Status: %s\n", 1374 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1375 } 1376 1377 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1378 1379 /* 1380 * res_aptpl_metadata 1381 */ 1382 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1383 struct se_subsystem_dev *su_dev, 1384 char *page) 1385 { 1386 if (!su_dev->se_dev_ptr) 1387 return -ENODEV; 1388 1389 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1390 return 0; 1391 1392 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1393 } 1394 1395 enum { 1396 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1397 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1398 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1399 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1400 }; 1401 1402 static match_table_t tokens = { 1403 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1404 {Opt_initiator_node, "initiator_node=%s"}, 1405 {Opt_initiator_sid, "initiator_sid=%s"}, 1406 {Opt_sa_res_key, "sa_res_key=%s"}, 1407 {Opt_res_holder, "res_holder=%d"}, 1408 {Opt_res_type, "res_type=%d"}, 1409 {Opt_res_scope, "res_scope=%d"}, 1410 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1411 {Opt_mapped_lun, "mapped_lun=%d"}, 1412 {Opt_target_fabric, "target_fabric=%s"}, 1413 {Opt_target_node, "target_node=%s"}, 1414 {Opt_tpgt, "tpgt=%d"}, 1415 {Opt_port_rtpi, "port_rtpi=%d"}, 1416 {Opt_target_lun, "target_lun=%d"}, 1417 {Opt_err, NULL} 1418 }; 1419 1420 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1421 struct se_subsystem_dev *su_dev, 1422 const char *page, 1423 size_t count) 1424 { 1425 struct se_device *dev; 1426 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1427 unsigned char *t_fabric = NULL, *t_port = NULL; 1428 char *orig, *ptr, *arg_p, *opts; 1429 substring_t args[MAX_OPT_ARGS]; 1430 unsigned long long tmp_ll; 1431 u64 sa_res_key = 0; 1432 u32 mapped_lun = 0, target_lun = 0; 1433 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1434 u16 port_rpti = 0, tpgt = 0; 1435 u8 type = 0, scope; 1436 1437 dev = su_dev->se_dev_ptr; 1438 if (!dev) 1439 return -ENODEV; 1440 1441 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1442 return 0; 1443 1444 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1445 pr_debug("Unable to process APTPL metadata while" 1446 " active fabric exports exist\n"); 1447 return -EINVAL; 1448 } 1449 1450 opts = kstrdup(page, GFP_KERNEL); 1451 if (!opts) 1452 return -ENOMEM; 1453 1454 orig = opts; 1455 while ((ptr = strsep(&opts, ",")) != NULL) { 1456 if (!*ptr) 1457 continue; 1458 1459 token = match_token(ptr, tokens, args); 1460 switch (token) { 1461 case Opt_initiator_fabric: 1462 i_fabric = match_strdup(&args[0]); 1463 if (!i_fabric) { 1464 ret = -ENOMEM; 1465 goto out; 1466 } 1467 break; 1468 case Opt_initiator_node: 1469 i_port = match_strdup(&args[0]); 1470 if (!i_port) { 1471 ret = -ENOMEM; 1472 goto out; 1473 } 1474 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1475 pr_err("APTPL metadata initiator_node=" 1476 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1477 PR_APTPL_MAX_IPORT_LEN); 1478 ret = -EINVAL; 1479 break; 1480 } 1481 break; 1482 case Opt_initiator_sid: 1483 isid = match_strdup(&args[0]); 1484 if (!isid) { 1485 ret = -ENOMEM; 1486 goto out; 1487 } 1488 if (strlen(isid) >= PR_REG_ISID_LEN) { 1489 pr_err("APTPL metadata initiator_isid" 1490 "= exceeds PR_REG_ISID_LEN: %d\n", 1491 PR_REG_ISID_LEN); 1492 ret = -EINVAL; 1493 break; 1494 } 1495 break; 1496 case Opt_sa_res_key: 1497 arg_p = match_strdup(&args[0]); 1498 if (!arg_p) { 1499 ret = -ENOMEM; 1500 goto out; 1501 } 1502 ret = strict_strtoull(arg_p, 0, &tmp_ll); 1503 if (ret < 0) { 1504 pr_err("strict_strtoull() failed for" 1505 " sa_res_key=\n"); 1506 goto out; 1507 } 1508 sa_res_key = (u64)tmp_ll; 1509 break; 1510 /* 1511 * PR APTPL Metadata for Reservation 1512 */ 1513 case Opt_res_holder: 1514 match_int(args, &arg); 1515 res_holder = arg; 1516 break; 1517 case Opt_res_type: 1518 match_int(args, &arg); 1519 type = (u8)arg; 1520 break; 1521 case Opt_res_scope: 1522 match_int(args, &arg); 1523 scope = (u8)arg; 1524 break; 1525 case Opt_res_all_tg_pt: 1526 match_int(args, &arg); 1527 all_tg_pt = (int)arg; 1528 break; 1529 case Opt_mapped_lun: 1530 match_int(args, &arg); 1531 mapped_lun = (u32)arg; 1532 break; 1533 /* 1534 * PR APTPL Metadata for Target Port 1535 */ 1536 case Opt_target_fabric: 1537 t_fabric = match_strdup(&args[0]); 1538 if (!t_fabric) { 1539 ret = -ENOMEM; 1540 goto out; 1541 } 1542 break; 1543 case Opt_target_node: 1544 t_port = match_strdup(&args[0]); 1545 if (!t_port) { 1546 ret = -ENOMEM; 1547 goto out; 1548 } 1549 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1550 pr_err("APTPL metadata target_node=" 1551 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1552 PR_APTPL_MAX_TPORT_LEN); 1553 ret = -EINVAL; 1554 break; 1555 } 1556 break; 1557 case Opt_tpgt: 1558 match_int(args, &arg); 1559 tpgt = (u16)arg; 1560 break; 1561 case Opt_port_rtpi: 1562 match_int(args, &arg); 1563 port_rpti = (u16)arg; 1564 break; 1565 case Opt_target_lun: 1566 match_int(args, &arg); 1567 target_lun = (u32)arg; 1568 break; 1569 default: 1570 break; 1571 } 1572 } 1573 1574 if (!i_port || !t_port || !sa_res_key) { 1575 pr_err("Illegal parameters for APTPL registration\n"); 1576 ret = -EINVAL; 1577 goto out; 1578 } 1579 1580 if (res_holder && !(type)) { 1581 pr_err("Illegal PR type: 0x%02x for reservation" 1582 " holder\n", type); 1583 ret = -EINVAL; 1584 goto out; 1585 } 1586 1587 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key, 1588 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1589 res_holder, all_tg_pt, type); 1590 out: 1591 kfree(i_fabric); 1592 kfree(i_port); 1593 kfree(isid); 1594 kfree(t_fabric); 1595 kfree(t_port); 1596 kfree(orig); 1597 return (ret == 0) ? count : ret; 1598 } 1599 1600 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1601 1602 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group); 1603 1604 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1605 &target_core_dev_pr_res_holder.attr, 1606 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1607 &target_core_dev_pr_res_pr_generation.attr, 1608 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1609 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1610 &target_core_dev_pr_res_pr_type.attr, 1611 &target_core_dev_pr_res_type.attr, 1612 &target_core_dev_pr_res_aptpl_active.attr, 1613 &target_core_dev_pr_res_aptpl_metadata.attr, 1614 NULL, 1615 }; 1616 1617 static struct configfs_item_operations target_core_dev_pr_ops = { 1618 .show_attribute = target_core_dev_pr_attr_show, 1619 .store_attribute = target_core_dev_pr_attr_store, 1620 }; 1621 1622 static struct config_item_type target_core_dev_pr_cit = { 1623 .ct_item_ops = &target_core_dev_pr_ops, 1624 .ct_attrs = target_core_dev_pr_attrs, 1625 .ct_owner = THIS_MODULE, 1626 }; 1627 1628 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1629 1630 /* Start functions for struct config_item_type target_core_dev_cit */ 1631 1632 static ssize_t target_core_show_dev_info(void *p, char *page) 1633 { 1634 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1635 struct se_hba *hba = se_dev->se_dev_hba; 1636 struct se_subsystem_api *t = hba->transport; 1637 int bl = 0; 1638 ssize_t read_bytes = 0; 1639 1640 if (!se_dev->se_dev_ptr) 1641 return -ENODEV; 1642 1643 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl); 1644 read_bytes += bl; 1645 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes); 1646 return read_bytes; 1647 } 1648 1649 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1650 .attr = { .ca_owner = THIS_MODULE, 1651 .ca_name = "info", 1652 .ca_mode = S_IRUGO }, 1653 .show = target_core_show_dev_info, 1654 .store = NULL, 1655 }; 1656 1657 static ssize_t target_core_store_dev_control( 1658 void *p, 1659 const char *page, 1660 size_t count) 1661 { 1662 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1663 struct se_hba *hba = se_dev->se_dev_hba; 1664 struct se_subsystem_api *t = hba->transport; 1665 1666 if (!se_dev->se_dev_su_ptr) { 1667 pr_err("Unable to locate struct se_subsystem_dev>se" 1668 "_dev_su_ptr\n"); 1669 return -EINVAL; 1670 } 1671 1672 return t->set_configfs_dev_params(hba, se_dev, page, count); 1673 } 1674 1675 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1676 .attr = { .ca_owner = THIS_MODULE, 1677 .ca_name = "control", 1678 .ca_mode = S_IWUSR }, 1679 .show = NULL, 1680 .store = target_core_store_dev_control, 1681 }; 1682 1683 static ssize_t target_core_show_dev_alias(void *p, char *page) 1684 { 1685 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1686 1687 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS)) 1688 return 0; 1689 1690 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias); 1691 } 1692 1693 static ssize_t target_core_store_dev_alias( 1694 void *p, 1695 const char *page, 1696 size_t count) 1697 { 1698 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1699 struct se_hba *hba = se_dev->se_dev_hba; 1700 ssize_t read_bytes; 1701 1702 if (count > (SE_DEV_ALIAS_LEN-1)) { 1703 pr_err("alias count: %d exceeds" 1704 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1705 SE_DEV_ALIAS_LEN-1); 1706 return -EINVAL; 1707 } 1708 1709 se_dev->su_dev_flags |= SDF_USING_ALIAS; 1710 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN, 1711 "%s", page); 1712 1713 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1714 config_item_name(&hba->hba_group.cg_item), 1715 config_item_name(&se_dev->se_dev_group.cg_item), 1716 se_dev->se_dev_alias); 1717 1718 return read_bytes; 1719 } 1720 1721 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1722 .attr = { .ca_owner = THIS_MODULE, 1723 .ca_name = "alias", 1724 .ca_mode = S_IRUGO | S_IWUSR }, 1725 .show = target_core_show_dev_alias, 1726 .store = target_core_store_dev_alias, 1727 }; 1728 1729 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1730 { 1731 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1732 1733 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) 1734 return 0; 1735 1736 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path); 1737 } 1738 1739 static ssize_t target_core_store_dev_udev_path( 1740 void *p, 1741 const char *page, 1742 size_t count) 1743 { 1744 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1745 struct se_hba *hba = se_dev->se_dev_hba; 1746 ssize_t read_bytes; 1747 1748 if (count > (SE_UDEV_PATH_LEN-1)) { 1749 pr_err("udev_path count: %d exceeds" 1750 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1751 SE_UDEV_PATH_LEN-1); 1752 return -EINVAL; 1753 } 1754 1755 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; 1756 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN, 1757 "%s", page); 1758 1759 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1760 config_item_name(&hba->hba_group.cg_item), 1761 config_item_name(&se_dev->se_dev_group.cg_item), 1762 se_dev->se_dev_udev_path); 1763 1764 return read_bytes; 1765 } 1766 1767 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1768 .attr = { .ca_owner = THIS_MODULE, 1769 .ca_name = "udev_path", 1770 .ca_mode = S_IRUGO | S_IWUSR }, 1771 .show = target_core_show_dev_udev_path, 1772 .store = target_core_store_dev_udev_path, 1773 }; 1774 1775 static ssize_t target_core_store_dev_enable( 1776 void *p, 1777 const char *page, 1778 size_t count) 1779 { 1780 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1781 struct se_device *dev; 1782 struct se_hba *hba = se_dev->se_dev_hba; 1783 struct se_subsystem_api *t = hba->transport; 1784 char *ptr; 1785 1786 ptr = strstr(page, "1"); 1787 if (!ptr) { 1788 pr_err("For dev_enable ops, only valid value" 1789 " is \"1\"\n"); 1790 return -EINVAL; 1791 } 1792 if (se_dev->se_dev_ptr) { 1793 pr_err("se_dev->se_dev_ptr already set for storage" 1794 " object\n"); 1795 return -EEXIST; 1796 } 1797 1798 if (t->check_configfs_dev_params(hba, se_dev) < 0) 1799 return -EINVAL; 1800 1801 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1802 if (IS_ERR(dev)) 1803 return PTR_ERR(dev); 1804 else if (!dev) 1805 return -EINVAL; 1806 1807 se_dev->se_dev_ptr = dev; 1808 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:" 1809 " %p\n", se_dev->se_dev_ptr); 1810 1811 return count; 1812 } 1813 1814 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1815 .attr = { .ca_owner = THIS_MODULE, 1816 .ca_name = "enable", 1817 .ca_mode = S_IWUSR }, 1818 .show = NULL, 1819 .store = target_core_store_dev_enable, 1820 }; 1821 1822 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1823 { 1824 struct se_device *dev; 1825 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1826 struct config_item *lu_ci; 1827 struct t10_alua_lu_gp *lu_gp; 1828 struct t10_alua_lu_gp_member *lu_gp_mem; 1829 ssize_t len = 0; 1830 1831 dev = su_dev->se_dev_ptr; 1832 if (!dev) 1833 return -ENODEV; 1834 1835 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) 1836 return len; 1837 1838 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1839 if (!lu_gp_mem) { 1840 pr_err("NULL struct se_device->dev_alua_lu_gp_mem" 1841 " pointer\n"); 1842 return -EINVAL; 1843 } 1844 1845 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1846 lu_gp = lu_gp_mem->lu_gp; 1847 if (lu_gp) { 1848 lu_ci = &lu_gp->lu_gp_group.cg_item; 1849 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1850 config_item_name(lu_ci), lu_gp->lu_gp_id); 1851 } 1852 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1853 1854 return len; 1855 } 1856 1857 static ssize_t target_core_store_alua_lu_gp( 1858 void *p, 1859 const char *page, 1860 size_t count) 1861 { 1862 struct se_device *dev; 1863 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1864 struct se_hba *hba = su_dev->se_dev_hba; 1865 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1866 struct t10_alua_lu_gp_member *lu_gp_mem; 1867 unsigned char buf[LU_GROUP_NAME_BUF]; 1868 int move = 0; 1869 1870 dev = su_dev->se_dev_ptr; 1871 if (!dev) 1872 return -ENODEV; 1873 1874 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) { 1875 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n", 1876 config_item_name(&hba->hba_group.cg_item), 1877 config_item_name(&su_dev->se_dev_group.cg_item)); 1878 return -EINVAL; 1879 } 1880 if (count > LU_GROUP_NAME_BUF) { 1881 pr_err("ALUA LU Group Alias too large!\n"); 1882 return -EINVAL; 1883 } 1884 memset(buf, 0, LU_GROUP_NAME_BUF); 1885 memcpy(buf, page, count); 1886 /* 1887 * Any ALUA logical unit alias besides "NULL" means we will be 1888 * making a new group association. 1889 */ 1890 if (strcmp(strstrip(buf), "NULL")) { 1891 /* 1892 * core_alua_get_lu_gp_by_name() will increment reference to 1893 * struct t10_alua_lu_gp. This reference is released with 1894 * core_alua_get_lu_gp_by_name below(). 1895 */ 1896 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1897 if (!lu_gp_new) 1898 return -ENODEV; 1899 } 1900 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1901 if (!lu_gp_mem) { 1902 if (lu_gp_new) 1903 core_alua_put_lu_gp_from_name(lu_gp_new); 1904 pr_err("NULL struct se_device->dev_alua_lu_gp_mem" 1905 " pointer\n"); 1906 return -EINVAL; 1907 } 1908 1909 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1910 lu_gp = lu_gp_mem->lu_gp; 1911 if (lu_gp) { 1912 /* 1913 * Clearing an existing lu_gp association, and replacing 1914 * with NULL 1915 */ 1916 if (!lu_gp_new) { 1917 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1918 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1919 " %hu\n", 1920 config_item_name(&hba->hba_group.cg_item), 1921 config_item_name(&su_dev->se_dev_group.cg_item), 1922 config_item_name(&lu_gp->lu_gp_group.cg_item), 1923 lu_gp->lu_gp_id); 1924 1925 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1926 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1927 1928 return count; 1929 } 1930 /* 1931 * Removing existing association of lu_gp_mem with lu_gp 1932 */ 1933 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1934 move = 1; 1935 } 1936 /* 1937 * Associate lu_gp_mem with lu_gp_new. 1938 */ 1939 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1940 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1941 1942 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1943 " core/alua/lu_gps/%s, ID: %hu\n", 1944 (move) ? "Moving" : "Adding", 1945 config_item_name(&hba->hba_group.cg_item), 1946 config_item_name(&su_dev->se_dev_group.cg_item), 1947 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1948 lu_gp_new->lu_gp_id); 1949 1950 core_alua_put_lu_gp_from_name(lu_gp_new); 1951 return count; 1952 } 1953 1954 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1955 .attr = { .ca_owner = THIS_MODULE, 1956 .ca_name = "alua_lu_gp", 1957 .ca_mode = S_IRUGO | S_IWUSR }, 1958 .show = target_core_show_alua_lu_gp, 1959 .store = target_core_store_alua_lu_gp, 1960 }; 1961 1962 static struct configfs_attribute *lio_core_dev_attrs[] = { 1963 &target_core_attr_dev_info.attr, 1964 &target_core_attr_dev_control.attr, 1965 &target_core_attr_dev_alias.attr, 1966 &target_core_attr_dev_udev_path.attr, 1967 &target_core_attr_dev_enable.attr, 1968 &target_core_attr_dev_alua_lu_gp.attr, 1969 NULL, 1970 }; 1971 1972 static void target_core_dev_release(struct config_item *item) 1973 { 1974 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 1975 struct se_subsystem_dev, se_dev_group); 1976 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 1977 struct se_subsystem_api *t = hba->transport; 1978 struct config_group *dev_cg = &se_dev->se_dev_group; 1979 1980 kfree(dev_cg->default_groups); 1981 /* 1982 * This pointer will set when the storage is enabled with: 1983 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable` 1984 */ 1985 if (se_dev->se_dev_ptr) { 1986 pr_debug("Target_Core_ConfigFS: Calling se_free_" 1987 "virtual_device() for se_dev_ptr: %p\n", 1988 se_dev->se_dev_ptr); 1989 1990 se_free_virtual_device(se_dev->se_dev_ptr, hba); 1991 } else { 1992 /* 1993 * Release struct se_subsystem_dev->se_dev_su_ptr.. 1994 */ 1995 pr_debug("Target_Core_ConfigFS: Calling t->free_" 1996 "device() for se_dev_su_ptr: %p\n", 1997 se_dev->se_dev_su_ptr); 1998 1999 t->free_device(se_dev->se_dev_su_ptr); 2000 } 2001 2002 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem" 2003 "_dev_t: %p\n", se_dev); 2004 kfree(se_dev); 2005 } 2006 2007 static ssize_t target_core_dev_show(struct config_item *item, 2008 struct configfs_attribute *attr, 2009 char *page) 2010 { 2011 struct se_subsystem_dev *se_dev = container_of( 2012 to_config_group(item), struct se_subsystem_dev, 2013 se_dev_group); 2014 struct target_core_configfs_attribute *tc_attr = container_of( 2015 attr, struct target_core_configfs_attribute, attr); 2016 2017 if (!tc_attr->show) 2018 return -EINVAL; 2019 2020 return tc_attr->show(se_dev, page); 2021 } 2022 2023 static ssize_t target_core_dev_store(struct config_item *item, 2024 struct configfs_attribute *attr, 2025 const char *page, size_t count) 2026 { 2027 struct se_subsystem_dev *se_dev = container_of( 2028 to_config_group(item), struct se_subsystem_dev, 2029 se_dev_group); 2030 struct target_core_configfs_attribute *tc_attr = container_of( 2031 attr, struct target_core_configfs_attribute, attr); 2032 2033 if (!tc_attr->store) 2034 return -EINVAL; 2035 2036 return tc_attr->store(se_dev, page, count); 2037 } 2038 2039 static struct configfs_item_operations target_core_dev_item_ops = { 2040 .release = target_core_dev_release, 2041 .show_attribute = target_core_dev_show, 2042 .store_attribute = target_core_dev_store, 2043 }; 2044 2045 static struct config_item_type target_core_dev_cit = { 2046 .ct_item_ops = &target_core_dev_item_ops, 2047 .ct_attrs = lio_core_dev_attrs, 2048 .ct_owner = THIS_MODULE, 2049 }; 2050 2051 /* End functions for struct config_item_type target_core_dev_cit */ 2052 2053 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2054 2055 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2056 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2057 static struct target_core_alua_lu_gp_attribute \ 2058 target_core_alua_lu_gp_##_name = \ 2059 __CONFIGFS_EATTR(_name, _mode, \ 2060 target_core_alua_lu_gp_show_attr_##_name, \ 2061 target_core_alua_lu_gp_store_attr_##_name); 2062 2063 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2064 static struct target_core_alua_lu_gp_attribute \ 2065 target_core_alua_lu_gp_##_name = \ 2066 __CONFIGFS_EATTR_RO(_name, \ 2067 target_core_alua_lu_gp_show_attr_##_name); 2068 2069 /* 2070 * lu_gp_id 2071 */ 2072 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2073 struct t10_alua_lu_gp *lu_gp, 2074 char *page) 2075 { 2076 if (!lu_gp->lu_gp_valid_id) 2077 return 0; 2078 2079 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2080 } 2081 2082 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2083 struct t10_alua_lu_gp *lu_gp, 2084 const char *page, 2085 size_t count) 2086 { 2087 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2088 unsigned long lu_gp_id; 2089 int ret; 2090 2091 ret = strict_strtoul(page, 0, &lu_gp_id); 2092 if (ret < 0) { 2093 pr_err("strict_strtoul() returned %d for" 2094 " lu_gp_id\n", ret); 2095 return -EINVAL; 2096 } 2097 if (lu_gp_id > 0x0000ffff) { 2098 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2099 " 0x0000ffff\n", lu_gp_id); 2100 return -EINVAL; 2101 } 2102 2103 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2104 if (ret < 0) 2105 return -EINVAL; 2106 2107 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2108 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2109 config_item_name(&alua_lu_gp_cg->cg_item), 2110 lu_gp->lu_gp_id); 2111 2112 return count; 2113 } 2114 2115 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2116 2117 /* 2118 * members 2119 */ 2120 static ssize_t target_core_alua_lu_gp_show_attr_members( 2121 struct t10_alua_lu_gp *lu_gp, 2122 char *page) 2123 { 2124 struct se_device *dev; 2125 struct se_hba *hba; 2126 struct se_subsystem_dev *su_dev; 2127 struct t10_alua_lu_gp_member *lu_gp_mem; 2128 ssize_t len = 0, cur_len; 2129 unsigned char buf[LU_GROUP_NAME_BUF]; 2130 2131 memset(buf, 0, LU_GROUP_NAME_BUF); 2132 2133 spin_lock(&lu_gp->lu_gp_lock); 2134 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2135 dev = lu_gp_mem->lu_gp_mem_dev; 2136 su_dev = dev->se_sub_dev; 2137 hba = su_dev->se_dev_hba; 2138 2139 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2140 config_item_name(&hba->hba_group.cg_item), 2141 config_item_name(&su_dev->se_dev_group.cg_item)); 2142 cur_len++; /* Extra byte for NULL terminator */ 2143 2144 if ((cur_len + len) > PAGE_SIZE) { 2145 pr_warn("Ran out of lu_gp_show_attr" 2146 "_members buffer\n"); 2147 break; 2148 } 2149 memcpy(page+len, buf, cur_len); 2150 len += cur_len; 2151 } 2152 spin_unlock(&lu_gp->lu_gp_lock); 2153 2154 return len; 2155 } 2156 2157 SE_DEV_ALUA_LU_ATTR_RO(members); 2158 2159 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2160 2161 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2162 &target_core_alua_lu_gp_lu_gp_id.attr, 2163 &target_core_alua_lu_gp_members.attr, 2164 NULL, 2165 }; 2166 2167 static void target_core_alua_lu_gp_release(struct config_item *item) 2168 { 2169 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2170 struct t10_alua_lu_gp, lu_gp_group); 2171 2172 core_alua_free_lu_gp(lu_gp); 2173 } 2174 2175 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2176 .release = target_core_alua_lu_gp_release, 2177 .show_attribute = target_core_alua_lu_gp_attr_show, 2178 .store_attribute = target_core_alua_lu_gp_attr_store, 2179 }; 2180 2181 static struct config_item_type target_core_alua_lu_gp_cit = { 2182 .ct_item_ops = &target_core_alua_lu_gp_ops, 2183 .ct_attrs = target_core_alua_lu_gp_attrs, 2184 .ct_owner = THIS_MODULE, 2185 }; 2186 2187 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2188 2189 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2190 2191 static struct config_group *target_core_alua_create_lu_gp( 2192 struct config_group *group, 2193 const char *name) 2194 { 2195 struct t10_alua_lu_gp *lu_gp; 2196 struct config_group *alua_lu_gp_cg = NULL; 2197 struct config_item *alua_lu_gp_ci = NULL; 2198 2199 lu_gp = core_alua_allocate_lu_gp(name, 0); 2200 if (IS_ERR(lu_gp)) 2201 return NULL; 2202 2203 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2204 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2205 2206 config_group_init_type_name(alua_lu_gp_cg, name, 2207 &target_core_alua_lu_gp_cit); 2208 2209 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2210 " Group: core/alua/lu_gps/%s\n", 2211 config_item_name(alua_lu_gp_ci)); 2212 2213 return alua_lu_gp_cg; 2214 2215 } 2216 2217 static void target_core_alua_drop_lu_gp( 2218 struct config_group *group, 2219 struct config_item *item) 2220 { 2221 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2222 struct t10_alua_lu_gp, lu_gp_group); 2223 2224 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2225 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2226 config_item_name(item), lu_gp->lu_gp_id); 2227 /* 2228 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2229 * -> target_core_alua_lu_gp_release() 2230 */ 2231 config_item_put(item); 2232 } 2233 2234 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2235 .make_group = &target_core_alua_create_lu_gp, 2236 .drop_item = &target_core_alua_drop_lu_gp, 2237 }; 2238 2239 static struct config_item_type target_core_alua_lu_gps_cit = { 2240 .ct_item_ops = NULL, 2241 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2242 .ct_owner = THIS_MODULE, 2243 }; 2244 2245 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2246 2247 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2248 2249 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2250 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2251 static struct target_core_alua_tg_pt_gp_attribute \ 2252 target_core_alua_tg_pt_gp_##_name = \ 2253 __CONFIGFS_EATTR(_name, _mode, \ 2254 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2255 target_core_alua_tg_pt_gp_store_attr_##_name); 2256 2257 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2258 static struct target_core_alua_tg_pt_gp_attribute \ 2259 target_core_alua_tg_pt_gp_##_name = \ 2260 __CONFIGFS_EATTR_RO(_name, \ 2261 target_core_alua_tg_pt_gp_show_attr_##_name); 2262 2263 /* 2264 * alua_access_state 2265 */ 2266 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2267 struct t10_alua_tg_pt_gp *tg_pt_gp, 2268 char *page) 2269 { 2270 return sprintf(page, "%d\n", 2271 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2272 } 2273 2274 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2275 struct t10_alua_tg_pt_gp *tg_pt_gp, 2276 const char *page, 2277 size_t count) 2278 { 2279 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev; 2280 unsigned long tmp; 2281 int new_state, ret; 2282 2283 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2284 pr_err("Unable to do implict ALUA on non valid" 2285 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2286 return -EINVAL; 2287 } 2288 2289 ret = strict_strtoul(page, 0, &tmp); 2290 if (ret < 0) { 2291 pr_err("Unable to extract new ALUA access state from" 2292 " %s\n", page); 2293 return -EINVAL; 2294 } 2295 new_state = (int)tmp; 2296 2297 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { 2298 pr_err("Unable to process implict configfs ALUA" 2299 " transition while TPGS_IMPLICT_ALUA is diabled\n"); 2300 return -EINVAL; 2301 } 2302 2303 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr, 2304 NULL, NULL, new_state, 0); 2305 return (!ret) ? count : -EINVAL; 2306 } 2307 2308 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2309 2310 /* 2311 * alua_access_status 2312 */ 2313 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2314 struct t10_alua_tg_pt_gp *tg_pt_gp, 2315 char *page) 2316 { 2317 return sprintf(page, "%s\n", 2318 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2319 } 2320 2321 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2322 struct t10_alua_tg_pt_gp *tg_pt_gp, 2323 const char *page, 2324 size_t count) 2325 { 2326 unsigned long tmp; 2327 int new_status, ret; 2328 2329 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2330 pr_err("Unable to do set ALUA access status on non" 2331 " valid tg_pt_gp ID: %hu\n", 2332 tg_pt_gp->tg_pt_gp_valid_id); 2333 return -EINVAL; 2334 } 2335 2336 ret = strict_strtoul(page, 0, &tmp); 2337 if (ret < 0) { 2338 pr_err("Unable to extract new ALUA access status" 2339 " from %s\n", page); 2340 return -EINVAL; 2341 } 2342 new_status = (int)tmp; 2343 2344 if ((new_status != ALUA_STATUS_NONE) && 2345 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && 2346 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 2347 pr_err("Illegal ALUA access status: 0x%02x\n", 2348 new_status); 2349 return -EINVAL; 2350 } 2351 2352 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2353 return count; 2354 } 2355 2356 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2357 2358 /* 2359 * alua_access_type 2360 */ 2361 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2362 struct t10_alua_tg_pt_gp *tg_pt_gp, 2363 char *page) 2364 { 2365 return core_alua_show_access_type(tg_pt_gp, page); 2366 } 2367 2368 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2369 struct t10_alua_tg_pt_gp *tg_pt_gp, 2370 const char *page, 2371 size_t count) 2372 { 2373 return core_alua_store_access_type(tg_pt_gp, page, count); 2374 } 2375 2376 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2377 2378 /* 2379 * alua_write_metadata 2380 */ 2381 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2382 struct t10_alua_tg_pt_gp *tg_pt_gp, 2383 char *page) 2384 { 2385 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2386 } 2387 2388 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2389 struct t10_alua_tg_pt_gp *tg_pt_gp, 2390 const char *page, 2391 size_t count) 2392 { 2393 unsigned long tmp; 2394 int ret; 2395 2396 ret = strict_strtoul(page, 0, &tmp); 2397 if (ret < 0) { 2398 pr_err("Unable to extract alua_write_metadata\n"); 2399 return -EINVAL; 2400 } 2401 2402 if ((tmp != 0) && (tmp != 1)) { 2403 pr_err("Illegal value for alua_write_metadata:" 2404 " %lu\n", tmp); 2405 return -EINVAL; 2406 } 2407 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2408 2409 return count; 2410 } 2411 2412 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2413 2414 2415 2416 /* 2417 * nonop_delay_msecs 2418 */ 2419 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2420 struct t10_alua_tg_pt_gp *tg_pt_gp, 2421 char *page) 2422 { 2423 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2424 2425 } 2426 2427 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2428 struct t10_alua_tg_pt_gp *tg_pt_gp, 2429 const char *page, 2430 size_t count) 2431 { 2432 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2433 } 2434 2435 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2436 2437 /* 2438 * trans_delay_msecs 2439 */ 2440 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2441 struct t10_alua_tg_pt_gp *tg_pt_gp, 2442 char *page) 2443 { 2444 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2445 } 2446 2447 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2448 struct t10_alua_tg_pt_gp *tg_pt_gp, 2449 const char *page, 2450 size_t count) 2451 { 2452 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2453 } 2454 2455 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2456 2457 /* 2458 * preferred 2459 */ 2460 2461 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2462 struct t10_alua_tg_pt_gp *tg_pt_gp, 2463 char *page) 2464 { 2465 return core_alua_show_preferred_bit(tg_pt_gp, page); 2466 } 2467 2468 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2469 struct t10_alua_tg_pt_gp *tg_pt_gp, 2470 const char *page, 2471 size_t count) 2472 { 2473 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2474 } 2475 2476 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2477 2478 /* 2479 * tg_pt_gp_id 2480 */ 2481 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2482 struct t10_alua_tg_pt_gp *tg_pt_gp, 2483 char *page) 2484 { 2485 if (!tg_pt_gp->tg_pt_gp_valid_id) 2486 return 0; 2487 2488 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2489 } 2490 2491 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2492 struct t10_alua_tg_pt_gp *tg_pt_gp, 2493 const char *page, 2494 size_t count) 2495 { 2496 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2497 unsigned long tg_pt_gp_id; 2498 int ret; 2499 2500 ret = strict_strtoul(page, 0, &tg_pt_gp_id); 2501 if (ret < 0) { 2502 pr_err("strict_strtoul() returned %d for" 2503 " tg_pt_gp_id\n", ret); 2504 return -EINVAL; 2505 } 2506 if (tg_pt_gp_id > 0x0000ffff) { 2507 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2508 " 0x0000ffff\n", tg_pt_gp_id); 2509 return -EINVAL; 2510 } 2511 2512 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2513 if (ret < 0) 2514 return -EINVAL; 2515 2516 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2517 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2518 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2519 tg_pt_gp->tg_pt_gp_id); 2520 2521 return count; 2522 } 2523 2524 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2525 2526 /* 2527 * members 2528 */ 2529 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2530 struct t10_alua_tg_pt_gp *tg_pt_gp, 2531 char *page) 2532 { 2533 struct se_port *port; 2534 struct se_portal_group *tpg; 2535 struct se_lun *lun; 2536 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2537 ssize_t len = 0, cur_len; 2538 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2539 2540 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2541 2542 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2543 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2544 tg_pt_gp_mem_list) { 2545 port = tg_pt_gp_mem->tg_pt; 2546 tpg = port->sep_tpg; 2547 lun = port->sep_lun; 2548 2549 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2550 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2551 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2552 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2553 config_item_name(&lun->lun_group.cg_item)); 2554 cur_len++; /* Extra byte for NULL terminator */ 2555 2556 if ((cur_len + len) > PAGE_SIZE) { 2557 pr_warn("Ran out of lu_gp_show_attr" 2558 "_members buffer\n"); 2559 break; 2560 } 2561 memcpy(page+len, buf, cur_len); 2562 len += cur_len; 2563 } 2564 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2565 2566 return len; 2567 } 2568 2569 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2570 2571 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2572 tg_pt_gp_group); 2573 2574 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2575 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2576 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2577 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2578 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2579 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2580 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2581 &target_core_alua_tg_pt_gp_preferred.attr, 2582 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2583 &target_core_alua_tg_pt_gp_members.attr, 2584 NULL, 2585 }; 2586 2587 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2588 { 2589 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2590 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2591 2592 core_alua_free_tg_pt_gp(tg_pt_gp); 2593 } 2594 2595 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2596 .release = target_core_alua_tg_pt_gp_release, 2597 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2598 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2599 }; 2600 2601 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2602 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2603 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2604 .ct_owner = THIS_MODULE, 2605 }; 2606 2607 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2608 2609 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2610 2611 static struct config_group *target_core_alua_create_tg_pt_gp( 2612 struct config_group *group, 2613 const char *name) 2614 { 2615 struct t10_alua *alua = container_of(group, struct t10_alua, 2616 alua_tg_pt_gps_group); 2617 struct t10_alua_tg_pt_gp *tg_pt_gp; 2618 struct se_subsystem_dev *su_dev = alua->t10_sub_dev; 2619 struct config_group *alua_tg_pt_gp_cg = NULL; 2620 struct config_item *alua_tg_pt_gp_ci = NULL; 2621 2622 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0); 2623 if (!tg_pt_gp) 2624 return NULL; 2625 2626 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2627 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2628 2629 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2630 &target_core_alua_tg_pt_gp_cit); 2631 2632 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2633 " Group: alua/tg_pt_gps/%s\n", 2634 config_item_name(alua_tg_pt_gp_ci)); 2635 2636 return alua_tg_pt_gp_cg; 2637 } 2638 2639 static void target_core_alua_drop_tg_pt_gp( 2640 struct config_group *group, 2641 struct config_item *item) 2642 { 2643 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2644 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2645 2646 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2647 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2648 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2649 /* 2650 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2651 * -> target_core_alua_tg_pt_gp_release(). 2652 */ 2653 config_item_put(item); 2654 } 2655 2656 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2657 .make_group = &target_core_alua_create_tg_pt_gp, 2658 .drop_item = &target_core_alua_drop_tg_pt_gp, 2659 }; 2660 2661 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2662 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2663 .ct_owner = THIS_MODULE, 2664 }; 2665 2666 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2667 2668 /* Start functions for struct config_item_type target_core_alua_cit */ 2669 2670 /* 2671 * target_core_alua_cit is a ConfigFS group that lives under 2672 * /sys/kernel/config/target/core/alua. There are default groups 2673 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2674 * target_core_alua_cit in target_core_init_configfs() below. 2675 */ 2676 static struct config_item_type target_core_alua_cit = { 2677 .ct_item_ops = NULL, 2678 .ct_attrs = NULL, 2679 .ct_owner = THIS_MODULE, 2680 }; 2681 2682 /* End functions for struct config_item_type target_core_alua_cit */ 2683 2684 /* Start functions for struct config_item_type target_core_stat_cit */ 2685 2686 static struct config_group *target_core_stat_mkdir( 2687 struct config_group *group, 2688 const char *name) 2689 { 2690 return ERR_PTR(-ENOSYS); 2691 } 2692 2693 static void target_core_stat_rmdir( 2694 struct config_group *group, 2695 struct config_item *item) 2696 { 2697 return; 2698 } 2699 2700 static struct configfs_group_operations target_core_stat_group_ops = { 2701 .make_group = &target_core_stat_mkdir, 2702 .drop_item = &target_core_stat_rmdir, 2703 }; 2704 2705 static struct config_item_type target_core_stat_cit = { 2706 .ct_group_ops = &target_core_stat_group_ops, 2707 .ct_owner = THIS_MODULE, 2708 }; 2709 2710 /* End functions for struct config_item_type target_core_stat_cit */ 2711 2712 /* Start functions for struct config_item_type target_core_hba_cit */ 2713 2714 static struct config_group *target_core_make_subdev( 2715 struct config_group *group, 2716 const char *name) 2717 { 2718 struct t10_alua_tg_pt_gp *tg_pt_gp; 2719 struct se_subsystem_dev *se_dev; 2720 struct se_subsystem_api *t; 2721 struct config_item *hba_ci = &group->cg_item; 2722 struct se_hba *hba = item_to_hba(hba_ci); 2723 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2724 struct config_group *dev_stat_grp = NULL; 2725 int errno = -ENOMEM, ret; 2726 2727 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2728 if (ret) 2729 return ERR_PTR(ret); 2730 /* 2731 * Locate the struct se_subsystem_api from parent's struct se_hba. 2732 */ 2733 t = hba->transport; 2734 2735 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 2736 if (!se_dev) { 2737 pr_err("Unable to allocate memory for" 2738 " struct se_subsystem_dev\n"); 2739 goto unlock; 2740 } 2741 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 2742 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 2743 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 2744 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 2745 spin_lock_init(&se_dev->t10_pr.registration_lock); 2746 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 2747 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 2748 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 2749 spin_lock_init(&se_dev->se_dev_lock); 2750 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 2751 se_dev->t10_wwn.t10_sub_dev = se_dev; 2752 se_dev->t10_alua.t10_sub_dev = se_dev; 2753 se_dev->se_dev_attrib.da_sub_dev = se_dev; 2754 2755 se_dev->se_dev_hba = hba; 2756 dev_cg = &se_dev->se_dev_group; 2757 2758 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7, 2759 GFP_KERNEL); 2760 if (!dev_cg->default_groups) 2761 goto out; 2762 /* 2763 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr 2764 * for ->allocate_virtdevice() 2765 * 2766 * se_dev->se_dev_ptr will be set after ->create_virtdev() 2767 * has been called successfully in the next level up in the 2768 * configfs tree for device object's struct config_group. 2769 */ 2770 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name); 2771 if (!se_dev->se_dev_su_ptr) { 2772 pr_err("Unable to locate subsystem dependent pointer" 2773 " from allocate_virtdevice()\n"); 2774 goto out; 2775 } 2776 2777 config_group_init_type_name(&se_dev->se_dev_group, name, 2778 &target_core_dev_cit); 2779 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib", 2780 &target_core_dev_attrib_cit); 2781 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr", 2782 &target_core_dev_pr_cit); 2783 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn", 2784 &target_core_dev_wwn_cit); 2785 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group, 2786 "alua", &target_core_alua_tg_pt_gps_cit); 2787 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group, 2788 "statistics", &target_core_stat_cit); 2789 2790 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group; 2791 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group; 2792 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group; 2793 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group; 2794 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group; 2795 dev_cg->default_groups[5] = NULL; 2796 /* 2797 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2798 */ 2799 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1); 2800 if (!tg_pt_gp) 2801 goto out; 2802 2803 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; 2804 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 2805 GFP_KERNEL); 2806 if (!tg_pt_gp_cg->default_groups) { 2807 pr_err("Unable to allocate tg_pt_gp_cg->" 2808 "default_groups\n"); 2809 goto out; 2810 } 2811 2812 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2813 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2814 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2815 tg_pt_gp_cg->default_groups[1] = NULL; 2816 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2817 /* 2818 * Add core/$HBA/$DEV/statistics/ default groups 2819 */ 2820 dev_stat_grp = &se_dev->dev_stat_grps.stat_group; 2821 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4, 2822 GFP_KERNEL); 2823 if (!dev_stat_grp->default_groups) { 2824 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2825 goto out; 2826 } 2827 target_stat_setup_dev_default_groups(se_dev); 2828 2829 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:" 2830 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr); 2831 2832 mutex_unlock(&hba->hba_access_mutex); 2833 return &se_dev->se_dev_group; 2834 out: 2835 if (se_dev->t10_alua.default_tg_pt_gp) { 2836 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp); 2837 se_dev->t10_alua.default_tg_pt_gp = NULL; 2838 } 2839 if (dev_stat_grp) 2840 kfree(dev_stat_grp->default_groups); 2841 if (tg_pt_gp_cg) 2842 kfree(tg_pt_gp_cg->default_groups); 2843 if (dev_cg) 2844 kfree(dev_cg->default_groups); 2845 if (se_dev->se_dev_su_ptr) 2846 t->free_device(se_dev->se_dev_su_ptr); 2847 kfree(se_dev); 2848 unlock: 2849 mutex_unlock(&hba->hba_access_mutex); 2850 return ERR_PTR(errno); 2851 } 2852 2853 static void target_core_drop_subdev( 2854 struct config_group *group, 2855 struct config_item *item) 2856 { 2857 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 2858 struct se_subsystem_dev, se_dev_group); 2859 struct se_hba *hba; 2860 struct se_subsystem_api *t; 2861 struct config_item *df_item; 2862 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp; 2863 int i; 2864 2865 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 2866 2867 mutex_lock(&hba->hba_access_mutex); 2868 t = hba->transport; 2869 2870 dev_stat_grp = &se_dev->dev_stat_grps.stat_group; 2871 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2872 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2873 dev_stat_grp->default_groups[i] = NULL; 2874 config_item_put(df_item); 2875 } 2876 kfree(dev_stat_grp->default_groups); 2877 2878 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; 2879 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2880 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2881 tg_pt_gp_cg->default_groups[i] = NULL; 2882 config_item_put(df_item); 2883 } 2884 kfree(tg_pt_gp_cg->default_groups); 2885 /* 2886 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2887 * directly from target_core_alua_tg_pt_gp_release(). 2888 */ 2889 se_dev->t10_alua.default_tg_pt_gp = NULL; 2890 2891 dev_cg = &se_dev->se_dev_group; 2892 for (i = 0; dev_cg->default_groups[i]; i++) { 2893 df_item = &dev_cg->default_groups[i]->cg_item; 2894 dev_cg->default_groups[i] = NULL; 2895 config_item_put(df_item); 2896 } 2897 /* 2898 * The releasing of se_dev and associated se_dev->se_dev_ptr is done 2899 * from target_core_dev_item_ops->release() ->target_core_dev_release(). 2900 */ 2901 config_item_put(item); 2902 mutex_unlock(&hba->hba_access_mutex); 2903 } 2904 2905 static struct configfs_group_operations target_core_hba_group_ops = { 2906 .make_group = target_core_make_subdev, 2907 .drop_item = target_core_drop_subdev, 2908 }; 2909 2910 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2911 #define SE_HBA_ATTR(_name, _mode) \ 2912 static struct target_core_hba_attribute \ 2913 target_core_hba_##_name = \ 2914 __CONFIGFS_EATTR(_name, _mode, \ 2915 target_core_hba_show_attr_##_name, \ 2916 target_core_hba_store_attr_##_name); 2917 2918 #define SE_HBA_ATTR_RO(_name) \ 2919 static struct target_core_hba_attribute \ 2920 target_core_hba_##_name = \ 2921 __CONFIGFS_EATTR_RO(_name, \ 2922 target_core_hba_show_attr_##_name); 2923 2924 static ssize_t target_core_hba_show_attr_hba_info( 2925 struct se_hba *hba, 2926 char *page) 2927 { 2928 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2929 hba->hba_id, hba->transport->name, 2930 TARGET_CORE_CONFIGFS_VERSION); 2931 } 2932 2933 SE_HBA_ATTR_RO(hba_info); 2934 2935 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2936 char *page) 2937 { 2938 int hba_mode = 0; 2939 2940 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2941 hba_mode = 1; 2942 2943 return sprintf(page, "%d\n", hba_mode); 2944 } 2945 2946 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2947 const char *page, size_t count) 2948 { 2949 struct se_subsystem_api *transport = hba->transport; 2950 unsigned long mode_flag; 2951 int ret; 2952 2953 if (transport->pmode_enable_hba == NULL) 2954 return -EINVAL; 2955 2956 ret = strict_strtoul(page, 0, &mode_flag); 2957 if (ret < 0) { 2958 pr_err("Unable to extract hba mode flag: %d\n", ret); 2959 return -EINVAL; 2960 } 2961 2962 spin_lock(&hba->device_lock); 2963 if (!list_empty(&hba->hba_dev_list)) { 2964 pr_err("Unable to set hba_mode with active devices\n"); 2965 spin_unlock(&hba->device_lock); 2966 return -EINVAL; 2967 } 2968 spin_unlock(&hba->device_lock); 2969 2970 ret = transport->pmode_enable_hba(hba, mode_flag); 2971 if (ret < 0) 2972 return -EINVAL; 2973 if (ret > 0) 2974 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2975 else if (ret == 0) 2976 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2977 2978 return count; 2979 } 2980 2981 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2982 2983 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2984 2985 static void target_core_hba_release(struct config_item *item) 2986 { 2987 struct se_hba *hba = container_of(to_config_group(item), 2988 struct se_hba, hba_group); 2989 core_delete_hba(hba); 2990 } 2991 2992 static struct configfs_attribute *target_core_hba_attrs[] = { 2993 &target_core_hba_hba_info.attr, 2994 &target_core_hba_hba_mode.attr, 2995 NULL, 2996 }; 2997 2998 static struct configfs_item_operations target_core_hba_item_ops = { 2999 .release = target_core_hba_release, 3000 .show_attribute = target_core_hba_attr_show, 3001 .store_attribute = target_core_hba_attr_store, 3002 }; 3003 3004 static struct config_item_type target_core_hba_cit = { 3005 .ct_item_ops = &target_core_hba_item_ops, 3006 .ct_group_ops = &target_core_hba_group_ops, 3007 .ct_attrs = target_core_hba_attrs, 3008 .ct_owner = THIS_MODULE, 3009 }; 3010 3011 static struct config_group *target_core_call_addhbatotarget( 3012 struct config_group *group, 3013 const char *name) 3014 { 3015 char *se_plugin_str, *str, *str2; 3016 struct se_hba *hba; 3017 char buf[TARGET_CORE_NAME_MAX_LEN]; 3018 unsigned long plugin_dep_id = 0; 3019 int ret; 3020 3021 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3022 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3023 pr_err("Passed *name strlen(): %d exceeds" 3024 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3025 TARGET_CORE_NAME_MAX_LEN); 3026 return ERR_PTR(-ENAMETOOLONG); 3027 } 3028 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3029 3030 str = strstr(buf, "_"); 3031 if (!str) { 3032 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3033 return ERR_PTR(-EINVAL); 3034 } 3035 se_plugin_str = buf; 3036 /* 3037 * Special case for subsystem plugins that have "_" in their names. 3038 * Namely rd_direct and rd_mcp.. 3039 */ 3040 str2 = strstr(str+1, "_"); 3041 if (str2) { 3042 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3043 str2++; /* Skip to start of plugin dependent ID */ 3044 str = str2; 3045 } else { 3046 *str = '\0'; /* Terminate for *se_plugin_str */ 3047 str++; /* Skip to start of plugin dependent ID */ 3048 } 3049 3050 ret = strict_strtoul(str, 0, &plugin_dep_id); 3051 if (ret < 0) { 3052 pr_err("strict_strtoul() returned %d for" 3053 " plugin_dep_id\n", ret); 3054 return ERR_PTR(-EINVAL); 3055 } 3056 /* 3057 * Load up TCM subsystem plugins if they have not already been loaded. 3058 */ 3059 transport_subsystem_check_init(); 3060 3061 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3062 if (IS_ERR(hba)) 3063 return ERR_CAST(hba); 3064 3065 config_group_init_type_name(&hba->hba_group, name, 3066 &target_core_hba_cit); 3067 3068 return &hba->hba_group; 3069 } 3070 3071 static void target_core_call_delhbafromtarget( 3072 struct config_group *group, 3073 struct config_item *item) 3074 { 3075 /* 3076 * core_delete_hba() is called from target_core_hba_item_ops->release() 3077 * -> target_core_hba_release() 3078 */ 3079 config_item_put(item); 3080 } 3081 3082 static struct configfs_group_operations target_core_group_ops = { 3083 .make_group = target_core_call_addhbatotarget, 3084 .drop_item = target_core_call_delhbafromtarget, 3085 }; 3086 3087 static struct config_item_type target_core_cit = { 3088 .ct_item_ops = NULL, 3089 .ct_group_ops = &target_core_group_ops, 3090 .ct_attrs = NULL, 3091 .ct_owner = THIS_MODULE, 3092 }; 3093 3094 /* Stop functions for struct config_item_type target_core_hba_cit */ 3095 3096 static int __init target_core_init_configfs(void) 3097 { 3098 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3099 struct config_group *lu_gp_cg = NULL; 3100 struct configfs_subsystem *subsys; 3101 struct t10_alua_lu_gp *lu_gp; 3102 int ret; 3103 3104 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3105 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3106 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3107 3108 subsys = target_core_subsystem[0]; 3109 config_group_init(&subsys->su_group); 3110 mutex_init(&subsys->su_mutex); 3111 3112 INIT_LIST_HEAD(&g_tf_list); 3113 mutex_init(&g_tf_lock); 3114 ret = init_se_kmem_caches(); 3115 if (ret < 0) 3116 return ret; 3117 /* 3118 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3119 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3120 */ 3121 target_cg = &subsys->su_group; 3122 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3123 GFP_KERNEL); 3124 if (!target_cg->default_groups) { 3125 pr_err("Unable to allocate target_cg->default_groups\n"); 3126 goto out_global; 3127 } 3128 3129 config_group_init_type_name(&target_core_hbagroup, 3130 "core", &target_core_cit); 3131 target_cg->default_groups[0] = &target_core_hbagroup; 3132 target_cg->default_groups[1] = NULL; 3133 /* 3134 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3135 */ 3136 hba_cg = &target_core_hbagroup; 3137 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3138 GFP_KERNEL); 3139 if (!hba_cg->default_groups) { 3140 pr_err("Unable to allocate hba_cg->default_groups\n"); 3141 goto out_global; 3142 } 3143 config_group_init_type_name(&alua_group, 3144 "alua", &target_core_alua_cit); 3145 hba_cg->default_groups[0] = &alua_group; 3146 hba_cg->default_groups[1] = NULL; 3147 /* 3148 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3149 * groups under /sys/kernel/config/target/core/alua/ 3150 */ 3151 alua_cg = &alua_group; 3152 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3153 GFP_KERNEL); 3154 if (!alua_cg->default_groups) { 3155 pr_err("Unable to allocate alua_cg->default_groups\n"); 3156 goto out_global; 3157 } 3158 3159 config_group_init_type_name(&alua_lu_gps_group, 3160 "lu_gps", &target_core_alua_lu_gps_cit); 3161 alua_cg->default_groups[0] = &alua_lu_gps_group; 3162 alua_cg->default_groups[1] = NULL; 3163 /* 3164 * Add core/alua/lu_gps/default_lu_gp 3165 */ 3166 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3167 if (IS_ERR(lu_gp)) 3168 goto out_global; 3169 3170 lu_gp_cg = &alua_lu_gps_group; 3171 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3172 GFP_KERNEL); 3173 if (!lu_gp_cg->default_groups) { 3174 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3175 goto out_global; 3176 } 3177 3178 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3179 &target_core_alua_lu_gp_cit); 3180 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3181 lu_gp_cg->default_groups[1] = NULL; 3182 default_lu_gp = lu_gp; 3183 /* 3184 * Register the target_core_mod subsystem with configfs. 3185 */ 3186 ret = configfs_register_subsystem(subsys); 3187 if (ret < 0) { 3188 pr_err("Error %d while registering subsystem %s\n", 3189 ret, subsys->su_group.cg_item.ci_namebuf); 3190 goto out_global; 3191 } 3192 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3193 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3194 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3195 /* 3196 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3197 */ 3198 ret = rd_module_init(); 3199 if (ret < 0) 3200 goto out; 3201 3202 if (core_dev_setup_virtual_lun0() < 0) 3203 goto out; 3204 3205 return 0; 3206 3207 out: 3208 configfs_unregister_subsystem(subsys); 3209 core_dev_release_virtual_lun0(); 3210 rd_module_exit(); 3211 out_global: 3212 if (default_lu_gp) { 3213 core_alua_free_lu_gp(default_lu_gp); 3214 default_lu_gp = NULL; 3215 } 3216 if (lu_gp_cg) 3217 kfree(lu_gp_cg->default_groups); 3218 if (alua_cg) 3219 kfree(alua_cg->default_groups); 3220 if (hba_cg) 3221 kfree(hba_cg->default_groups); 3222 kfree(target_cg->default_groups); 3223 release_se_kmem_caches(); 3224 return ret; 3225 } 3226 3227 static void __exit target_core_exit_configfs(void) 3228 { 3229 struct configfs_subsystem *subsys; 3230 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3231 struct config_item *item; 3232 int i; 3233 3234 subsys = target_core_subsystem[0]; 3235 3236 lu_gp_cg = &alua_lu_gps_group; 3237 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3238 item = &lu_gp_cg->default_groups[i]->cg_item; 3239 lu_gp_cg->default_groups[i] = NULL; 3240 config_item_put(item); 3241 } 3242 kfree(lu_gp_cg->default_groups); 3243 lu_gp_cg->default_groups = NULL; 3244 3245 alua_cg = &alua_group; 3246 for (i = 0; alua_cg->default_groups[i]; i++) { 3247 item = &alua_cg->default_groups[i]->cg_item; 3248 alua_cg->default_groups[i] = NULL; 3249 config_item_put(item); 3250 } 3251 kfree(alua_cg->default_groups); 3252 alua_cg->default_groups = NULL; 3253 3254 hba_cg = &target_core_hbagroup; 3255 for (i = 0; hba_cg->default_groups[i]; i++) { 3256 item = &hba_cg->default_groups[i]->cg_item; 3257 hba_cg->default_groups[i] = NULL; 3258 config_item_put(item); 3259 } 3260 kfree(hba_cg->default_groups); 3261 hba_cg->default_groups = NULL; 3262 /* 3263 * We expect subsys->su_group.default_groups to be released 3264 * by configfs subsystem provider logic.. 3265 */ 3266 configfs_unregister_subsystem(subsys); 3267 kfree(subsys->su_group.default_groups); 3268 3269 core_alua_free_lu_gp(default_lu_gp); 3270 default_lu_gp = NULL; 3271 3272 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3273 " Infrastructure\n"); 3274 3275 core_dev_release_virtual_lun0(); 3276 rd_module_exit(); 3277 release_se_kmem_caches(); 3278 } 3279 3280 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3281 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3282 MODULE_LICENSE("GPL"); 3283 3284 module_init(target_core_init_configfs); 3285 module_exit(target_core_exit_configfs); 3286