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 <linux/version.h> 27 #include <generated/utsrelease.h> 28 #include <linux/utsname.h> 29 #include <linux/init.h> 30 #include <linux/fs.h> 31 #include <linux/namei.h> 32 #include <linux/slab.h> 33 #include <linux/types.h> 34 #include <linux/delay.h> 35 #include <linux/unistd.h> 36 #include <linux/string.h> 37 #include <linux/parser.h> 38 #include <linux/syscalls.h> 39 #include <linux/configfs.h> 40 #include <linux/spinlock.h> 41 42 #include <target/target_core_base.h> 43 #include <target/target_core_device.h> 44 #include <target/target_core_transport.h> 45 #include <target/target_core_fabric_ops.h> 46 #include <target/target_core_fabric_configfs.h> 47 #include <target/target_core_configfs.h> 48 #include <target/configfs_macros.h> 49 50 #include "target_core_alua.h" 51 #include "target_core_hba.h" 52 #include "target_core_pr.h" 53 #include "target_core_rd.h" 54 #include "target_core_stat.h" 55 56 extern struct t10_alua_lu_gp *default_lu_gp; 57 58 static struct list_head g_tf_list; 59 static struct mutex g_tf_lock; 60 61 struct target_core_configfs_attribute { 62 struct configfs_attribute attr; 63 ssize_t (*show)(void *, char *); 64 ssize_t (*store)(void *, const char *, size_t); 65 }; 66 67 static struct config_group target_core_hbagroup; 68 static struct config_group alua_group; 69 static struct config_group alua_lu_gps_group; 70 71 static DEFINE_SPINLOCK(se_device_lock); 72 static LIST_HEAD(se_dev_list); 73 74 static inline struct se_hba * 75 item_to_hba(struct config_item *item) 76 { 77 return container_of(to_config_group(item), struct se_hba, hba_group); 78 } 79 80 /* 81 * Attributes for /sys/kernel/config/target/ 82 */ 83 static ssize_t target_core_attr_show(struct config_item *item, 84 struct configfs_attribute *attr, 85 char *page) 86 { 87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 89 utsname()->sysname, utsname()->machine); 90 } 91 92 static struct configfs_item_operations target_core_fabric_item_ops = { 93 .show_attribute = target_core_attr_show, 94 }; 95 96 static struct configfs_attribute target_core_item_attr_version = { 97 .ca_owner = THIS_MODULE, 98 .ca_name = "version", 99 .ca_mode = S_IRUGO, 100 }; 101 102 static struct target_fabric_configfs *target_core_get_fabric( 103 const char *name) 104 { 105 struct target_fabric_configfs *tf; 106 107 if (!name) 108 return NULL; 109 110 mutex_lock(&g_tf_lock); 111 list_for_each_entry(tf, &g_tf_list, tf_list) { 112 if (!strcmp(tf->tf_name, name)) { 113 atomic_inc(&tf->tf_access_cnt); 114 mutex_unlock(&g_tf_lock); 115 return tf; 116 } 117 } 118 mutex_unlock(&g_tf_lock); 119 120 return NULL; 121 } 122 123 /* 124 * Called from struct target_core_group_ops->make_group() 125 */ 126 static struct config_group *target_core_register_fabric( 127 struct config_group *group, 128 const char *name) 129 { 130 struct target_fabric_configfs *tf; 131 int ret; 132 133 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 134 " %s\n", group, name); 135 /* 136 * Ensure that TCM subsystem plugins are loaded at this point for 137 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port 138 * LUN symlinks. 139 */ 140 if (transport_subsystem_check_init() < 0) 141 return ERR_PTR(-EINVAL); 142 143 /* 144 * Below are some hardcoded request_module() calls to automatically 145 * local fabric modules when the following is called: 146 * 147 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 148 * 149 * Note that this does not limit which TCM fabric module can be 150 * registered, but simply provids auto loading logic for modules with 151 * mkdir(2) system calls with known TCM fabric modules. 152 */ 153 if (!strncmp(name, "iscsi", 5)) { 154 /* 155 * Automatically load the LIO Target fabric module when the 156 * following is called: 157 * 158 * mkdir -p $CONFIGFS/target/iscsi 159 */ 160 ret = request_module("iscsi_target_mod"); 161 if (ret < 0) { 162 pr_err("request_module() failed for" 163 " iscsi_target_mod.ko: %d\n", ret); 164 return ERR_PTR(-EINVAL); 165 } 166 } else if (!strncmp(name, "loopback", 8)) { 167 /* 168 * Automatically load the tcm_loop fabric module when the 169 * following is called: 170 * 171 * mkdir -p $CONFIGFS/target/loopback 172 */ 173 ret = request_module("tcm_loop"); 174 if (ret < 0) { 175 pr_err("request_module() failed for" 176 " tcm_loop.ko: %d\n", ret); 177 return ERR_PTR(-EINVAL); 178 } 179 } 180 181 tf = target_core_get_fabric(name); 182 if (!tf) { 183 pr_err("target_core_get_fabric() failed for %s\n", 184 name); 185 return ERR_PTR(-EINVAL); 186 } 187 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 188 " %s\n", tf->tf_name); 189 /* 190 * On a successful target_core_get_fabric() look, the returned 191 * struct target_fabric_configfs *tf will contain a usage reference. 192 */ 193 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 194 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 195 196 tf->tf_group.default_groups = tf->tf_default_groups; 197 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 198 tf->tf_group.default_groups[1] = NULL; 199 200 config_group_init_type_name(&tf->tf_group, name, 201 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 202 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 203 &TF_CIT_TMPL(tf)->tfc_discovery_cit); 204 205 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 206 " %s\n", tf->tf_group.cg_item.ci_name); 207 /* 208 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 209 */ 210 tf->tf_ops.tf_subsys = tf->tf_subsys; 211 tf->tf_fabric = &tf->tf_group.cg_item; 212 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 213 " for %s\n", name); 214 215 return &tf->tf_group; 216 } 217 218 /* 219 * Called from struct target_core_group_ops->drop_item() 220 */ 221 static void target_core_deregister_fabric( 222 struct config_group *group, 223 struct config_item *item) 224 { 225 struct target_fabric_configfs *tf = container_of( 226 to_config_group(item), struct target_fabric_configfs, tf_group); 227 struct config_group *tf_group; 228 struct config_item *df_item; 229 int i; 230 231 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 232 " tf list\n", config_item_name(item)); 233 234 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 235 " %s\n", tf->tf_name); 236 atomic_dec(&tf->tf_access_cnt); 237 238 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 239 " tf->tf_fabric for %s\n", tf->tf_name); 240 tf->tf_fabric = NULL; 241 242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 243 " %s\n", config_item_name(item)); 244 245 tf_group = &tf->tf_group; 246 for (i = 0; tf_group->default_groups[i]; i++) { 247 df_item = &tf_group->default_groups[i]->cg_item; 248 tf_group->default_groups[i] = NULL; 249 config_item_put(df_item); 250 } 251 config_item_put(item); 252 } 253 254 static struct configfs_group_operations target_core_fabric_group_ops = { 255 .make_group = &target_core_register_fabric, 256 .drop_item = &target_core_deregister_fabric, 257 }; 258 259 /* 260 * All item attributes appearing in /sys/kernel/target/ appear here. 261 */ 262 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 263 &target_core_item_attr_version, 264 NULL, 265 }; 266 267 /* 268 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 269 */ 270 static struct config_item_type target_core_fabrics_item = { 271 .ct_item_ops = &target_core_fabric_item_ops, 272 .ct_group_ops = &target_core_fabric_group_ops, 273 .ct_attrs = target_core_fabric_item_attrs, 274 .ct_owner = THIS_MODULE, 275 }; 276 277 static struct configfs_subsystem target_core_fabrics = { 278 .su_group = { 279 .cg_item = { 280 .ci_namebuf = "target", 281 .ci_type = &target_core_fabrics_item, 282 }, 283 }, 284 }; 285 286 static struct configfs_subsystem *target_core_subsystem[] = { 287 &target_core_fabrics, 288 NULL, 289 }; 290 291 /*############################################################################## 292 // Start functions called by external Target Fabrics Modules 293 //############################################################################*/ 294 295 /* 296 * First function called by fabric modules to: 297 * 298 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 299 * 2) Add struct target_fabric_configfs to g_tf_list 300 * 3) Return struct target_fabric_configfs to fabric module to be passed 301 * into target_fabric_configfs_register(). 302 */ 303 struct target_fabric_configfs *target_fabric_configfs_init( 304 struct module *fabric_mod, 305 const char *name) 306 { 307 struct target_fabric_configfs *tf; 308 309 if (!(name)) { 310 pr_err("Unable to locate passed fabric name\n"); 311 return ERR_PTR(-EINVAL); 312 } 313 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 314 pr_err("Passed name: %s exceeds TARGET_FABRIC" 315 "_NAME_SIZE\n", name); 316 return ERR_PTR(-EINVAL); 317 } 318 319 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 320 if (!tf) 321 return ERR_PTR(-ENOMEM); 322 323 INIT_LIST_HEAD(&tf->tf_list); 324 atomic_set(&tf->tf_access_cnt, 0); 325 /* 326 * Setup the default generic struct config_item_type's (cits) in 327 * struct target_fabric_configfs->tf_cit_tmpl 328 */ 329 tf->tf_module = fabric_mod; 330 target_fabric_setup_cits(tf); 331 332 tf->tf_subsys = target_core_subsystem[0]; 333 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 334 335 mutex_lock(&g_tf_lock); 336 list_add_tail(&tf->tf_list, &g_tf_list); 337 mutex_unlock(&g_tf_lock); 338 339 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 340 ">>>>>>>>>>>>>>\n"); 341 pr_debug("Initialized struct target_fabric_configfs: %p for" 342 " %s\n", tf, tf->tf_name); 343 return tf; 344 } 345 EXPORT_SYMBOL(target_fabric_configfs_init); 346 347 /* 348 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 349 */ 350 void target_fabric_configfs_free( 351 struct target_fabric_configfs *tf) 352 { 353 mutex_lock(&g_tf_lock); 354 list_del(&tf->tf_list); 355 mutex_unlock(&g_tf_lock); 356 357 kfree(tf); 358 } 359 EXPORT_SYMBOL(target_fabric_configfs_free); 360 361 /* 362 * Perform a sanity check of the passed tf->tf_ops before completing 363 * TCM fabric module registration. 364 */ 365 static int target_fabric_tf_ops_check( 366 struct target_fabric_configfs *tf) 367 { 368 struct target_core_fabric_ops *tfo = &tf->tf_ops; 369 370 if (!tfo->get_fabric_name) { 371 pr_err("Missing tfo->get_fabric_name()\n"); 372 return -EINVAL; 373 } 374 if (!tfo->get_fabric_proto_ident) { 375 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 376 return -EINVAL; 377 } 378 if (!tfo->tpg_get_wwn) { 379 pr_err("Missing tfo->tpg_get_wwn()\n"); 380 return -EINVAL; 381 } 382 if (!tfo->tpg_get_tag) { 383 pr_err("Missing tfo->tpg_get_tag()\n"); 384 return -EINVAL; 385 } 386 if (!tfo->tpg_get_default_depth) { 387 pr_err("Missing tfo->tpg_get_default_depth()\n"); 388 return -EINVAL; 389 } 390 if (!tfo->tpg_get_pr_transport_id) { 391 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 392 return -EINVAL; 393 } 394 if (!tfo->tpg_get_pr_transport_id_len) { 395 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 396 return -EINVAL; 397 } 398 if (!tfo->tpg_check_demo_mode) { 399 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 400 return -EINVAL; 401 } 402 if (!tfo->tpg_check_demo_mode_cache) { 403 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 404 return -EINVAL; 405 } 406 if (!tfo->tpg_check_demo_mode_write_protect) { 407 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 408 return -EINVAL; 409 } 410 if (!tfo->tpg_check_prod_mode_write_protect) { 411 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 412 return -EINVAL; 413 } 414 if (!tfo->tpg_alloc_fabric_acl) { 415 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 416 return -EINVAL; 417 } 418 if (!tfo->tpg_release_fabric_acl) { 419 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 420 return -EINVAL; 421 } 422 if (!tfo->tpg_get_inst_index) { 423 pr_err("Missing tfo->tpg_get_inst_index()\n"); 424 return -EINVAL; 425 } 426 if (!tfo->release_cmd) { 427 pr_err("Missing tfo->release_cmd()\n"); 428 return -EINVAL; 429 } 430 if (!tfo->shutdown_session) { 431 pr_err("Missing tfo->shutdown_session()\n"); 432 return -EINVAL; 433 } 434 if (!tfo->close_session) { 435 pr_err("Missing tfo->close_session()\n"); 436 return -EINVAL; 437 } 438 if (!tfo->stop_session) { 439 pr_err("Missing tfo->stop_session()\n"); 440 return -EINVAL; 441 } 442 if (!tfo->fall_back_to_erl0) { 443 pr_err("Missing tfo->fall_back_to_erl0()\n"); 444 return -EINVAL; 445 } 446 if (!tfo->sess_logged_in) { 447 pr_err("Missing tfo->sess_logged_in()\n"); 448 return -EINVAL; 449 } 450 if (!tfo->sess_get_index) { 451 pr_err("Missing tfo->sess_get_index()\n"); 452 return -EINVAL; 453 } 454 if (!tfo->write_pending) { 455 pr_err("Missing tfo->write_pending()\n"); 456 return -EINVAL; 457 } 458 if (!tfo->write_pending_status) { 459 pr_err("Missing tfo->write_pending_status()\n"); 460 return -EINVAL; 461 } 462 if (!tfo->set_default_node_attributes) { 463 pr_err("Missing tfo->set_default_node_attributes()\n"); 464 return -EINVAL; 465 } 466 if (!tfo->get_task_tag) { 467 pr_err("Missing tfo->get_task_tag()\n"); 468 return -EINVAL; 469 } 470 if (!tfo->get_cmd_state) { 471 pr_err("Missing tfo->get_cmd_state()\n"); 472 return -EINVAL; 473 } 474 if (!tfo->queue_data_in) { 475 pr_err("Missing tfo->queue_data_in()\n"); 476 return -EINVAL; 477 } 478 if (!tfo->queue_status) { 479 pr_err("Missing tfo->queue_status()\n"); 480 return -EINVAL; 481 } 482 if (!tfo->queue_tm_rsp) { 483 pr_err("Missing tfo->queue_tm_rsp()\n"); 484 return -EINVAL; 485 } 486 if (!tfo->set_fabric_sense_len) { 487 pr_err("Missing tfo->set_fabric_sense_len()\n"); 488 return -EINVAL; 489 } 490 if (!tfo->get_fabric_sense_len) { 491 pr_err("Missing tfo->get_fabric_sense_len()\n"); 492 return -EINVAL; 493 } 494 if (!tfo->is_state_remove) { 495 pr_err("Missing tfo->is_state_remove()\n"); 496 return -EINVAL; 497 } 498 /* 499 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 500 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 501 * target_core_fabric_configfs.c WWN+TPG group context code. 502 */ 503 if (!tfo->fabric_make_wwn) { 504 pr_err("Missing tfo->fabric_make_wwn()\n"); 505 return -EINVAL; 506 } 507 if (!tfo->fabric_drop_wwn) { 508 pr_err("Missing tfo->fabric_drop_wwn()\n"); 509 return -EINVAL; 510 } 511 if (!tfo->fabric_make_tpg) { 512 pr_err("Missing tfo->fabric_make_tpg()\n"); 513 return -EINVAL; 514 } 515 if (!tfo->fabric_drop_tpg) { 516 pr_err("Missing tfo->fabric_drop_tpg()\n"); 517 return -EINVAL; 518 } 519 520 return 0; 521 } 522 523 /* 524 * Called 2nd from fabric module with returned parameter of 525 * struct target_fabric_configfs * from target_fabric_configfs_init(). 526 * 527 * Upon a successful registration, the new fabric's struct config_item is 528 * return. Also, a pointer to this struct is set in the passed 529 * struct target_fabric_configfs. 530 */ 531 int target_fabric_configfs_register( 532 struct target_fabric_configfs *tf) 533 { 534 int ret; 535 536 if (!tf) { 537 pr_err("Unable to locate target_fabric_configfs" 538 " pointer\n"); 539 return -EINVAL; 540 } 541 if (!tf->tf_subsys) { 542 pr_err("Unable to target struct config_subsystem" 543 " pointer\n"); 544 return -EINVAL; 545 } 546 ret = target_fabric_tf_ops_check(tf); 547 if (ret < 0) 548 return ret; 549 550 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 551 ">>>>>>>>>>\n"); 552 return 0; 553 } 554 EXPORT_SYMBOL(target_fabric_configfs_register); 555 556 void target_fabric_configfs_deregister( 557 struct target_fabric_configfs *tf) 558 { 559 struct configfs_subsystem *su; 560 561 if (!tf) { 562 pr_err("Unable to locate passed target_fabric_" 563 "configfs\n"); 564 return; 565 } 566 su = tf->tf_subsys; 567 if (!su) { 568 pr_err("Unable to locate passed tf->tf_subsys" 569 " pointer\n"); 570 return; 571 } 572 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 573 ">>>>>>>>>>>>\n"); 574 mutex_lock(&g_tf_lock); 575 if (atomic_read(&tf->tf_access_cnt)) { 576 mutex_unlock(&g_tf_lock); 577 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 578 tf->tf_name); 579 BUG(); 580 } 581 list_del(&tf->tf_list); 582 mutex_unlock(&g_tf_lock); 583 584 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 585 " %s\n", tf->tf_name); 586 tf->tf_module = NULL; 587 tf->tf_subsys = NULL; 588 kfree(tf); 589 590 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 591 ">>>>>\n"); 592 } 593 EXPORT_SYMBOL(target_fabric_configfs_deregister); 594 595 /*############################################################################## 596 // Stop functions called by external Target Fabrics Modules 597 //############################################################################*/ 598 599 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 600 601 #define DEF_DEV_ATTRIB_SHOW(_name) \ 602 static ssize_t target_core_dev_show_attr_##_name( \ 603 struct se_dev_attrib *da, \ 604 char *page) \ 605 { \ 606 struct se_device *dev; \ 607 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 608 ssize_t rb; \ 609 \ 610 spin_lock(&se_dev->se_dev_lock); \ 611 dev = se_dev->se_dev_ptr; \ 612 if (!dev) { \ 613 spin_unlock(&se_dev->se_dev_lock); \ 614 return -ENODEV; \ 615 } \ 616 rb = snprintf(page, PAGE_SIZE, "%u\n", \ 617 (u32)dev->se_sub_dev->se_dev_attrib._name); \ 618 spin_unlock(&se_dev->se_dev_lock); \ 619 \ 620 return rb; \ 621 } 622 623 #define DEF_DEV_ATTRIB_STORE(_name) \ 624 static ssize_t target_core_dev_store_attr_##_name( \ 625 struct se_dev_attrib *da, \ 626 const char *page, \ 627 size_t count) \ 628 { \ 629 struct se_device *dev; \ 630 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 631 unsigned long val; \ 632 int ret; \ 633 \ 634 spin_lock(&se_dev->se_dev_lock); \ 635 dev = se_dev->se_dev_ptr; \ 636 if (!dev) { \ 637 spin_unlock(&se_dev->se_dev_lock); \ 638 return -ENODEV; \ 639 } \ 640 ret = strict_strtoul(page, 0, &val); \ 641 if (ret < 0) { \ 642 spin_unlock(&se_dev->se_dev_lock); \ 643 pr_err("strict_strtoul() failed with" \ 644 " ret: %d\n", ret); \ 645 return -EINVAL; \ 646 } \ 647 ret = se_dev_set_##_name(dev, (u32)val); \ 648 spin_unlock(&se_dev->se_dev_lock); \ 649 \ 650 return (!ret) ? count : -EINVAL; \ 651 } 652 653 #define DEF_DEV_ATTRIB(_name) \ 654 DEF_DEV_ATTRIB_SHOW(_name); \ 655 DEF_DEV_ATTRIB_STORE(_name); 656 657 #define DEF_DEV_ATTRIB_RO(_name) \ 658 DEF_DEV_ATTRIB_SHOW(_name); 659 660 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 661 #define SE_DEV_ATTR(_name, _mode) \ 662 static struct target_core_dev_attrib_attribute \ 663 target_core_dev_attrib_##_name = \ 664 __CONFIGFS_EATTR(_name, _mode, \ 665 target_core_dev_show_attr_##_name, \ 666 target_core_dev_store_attr_##_name); 667 668 #define SE_DEV_ATTR_RO(_name); \ 669 static struct target_core_dev_attrib_attribute \ 670 target_core_dev_attrib_##_name = \ 671 __CONFIGFS_EATTR_RO(_name, \ 672 target_core_dev_show_attr_##_name); 673 674 DEF_DEV_ATTRIB(emulate_dpo); 675 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 676 677 DEF_DEV_ATTRIB(emulate_fua_write); 678 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 679 680 DEF_DEV_ATTRIB(emulate_fua_read); 681 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 682 683 DEF_DEV_ATTRIB(emulate_write_cache); 684 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 685 686 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 687 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 688 689 DEF_DEV_ATTRIB(emulate_tas); 690 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 691 692 DEF_DEV_ATTRIB(emulate_tpu); 693 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 694 695 DEF_DEV_ATTRIB(emulate_tpws); 696 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 697 698 DEF_DEV_ATTRIB(enforce_pr_isids); 699 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 700 701 DEF_DEV_ATTRIB(is_nonrot); 702 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 703 704 DEF_DEV_ATTRIB(emulate_rest_reord); 705 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 706 707 DEF_DEV_ATTRIB_RO(hw_block_size); 708 SE_DEV_ATTR_RO(hw_block_size); 709 710 DEF_DEV_ATTRIB(block_size); 711 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 712 713 DEF_DEV_ATTRIB_RO(hw_max_sectors); 714 SE_DEV_ATTR_RO(hw_max_sectors); 715 716 DEF_DEV_ATTRIB(max_sectors); 717 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR); 718 719 DEF_DEV_ATTRIB(optimal_sectors); 720 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 721 722 DEF_DEV_ATTRIB_RO(hw_queue_depth); 723 SE_DEV_ATTR_RO(hw_queue_depth); 724 725 DEF_DEV_ATTRIB(queue_depth); 726 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 727 728 DEF_DEV_ATTRIB(task_timeout); 729 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR); 730 731 DEF_DEV_ATTRIB(max_unmap_lba_count); 732 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 733 734 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 735 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 736 737 DEF_DEV_ATTRIB(unmap_granularity); 738 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 739 740 DEF_DEV_ATTRIB(unmap_granularity_alignment); 741 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 742 743 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 744 745 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 746 &target_core_dev_attrib_emulate_dpo.attr, 747 &target_core_dev_attrib_emulate_fua_write.attr, 748 &target_core_dev_attrib_emulate_fua_read.attr, 749 &target_core_dev_attrib_emulate_write_cache.attr, 750 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 751 &target_core_dev_attrib_emulate_tas.attr, 752 &target_core_dev_attrib_emulate_tpu.attr, 753 &target_core_dev_attrib_emulate_tpws.attr, 754 &target_core_dev_attrib_enforce_pr_isids.attr, 755 &target_core_dev_attrib_is_nonrot.attr, 756 &target_core_dev_attrib_emulate_rest_reord.attr, 757 &target_core_dev_attrib_hw_block_size.attr, 758 &target_core_dev_attrib_block_size.attr, 759 &target_core_dev_attrib_hw_max_sectors.attr, 760 &target_core_dev_attrib_max_sectors.attr, 761 &target_core_dev_attrib_optimal_sectors.attr, 762 &target_core_dev_attrib_hw_queue_depth.attr, 763 &target_core_dev_attrib_queue_depth.attr, 764 &target_core_dev_attrib_task_timeout.attr, 765 &target_core_dev_attrib_max_unmap_lba_count.attr, 766 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 767 &target_core_dev_attrib_unmap_granularity.attr, 768 &target_core_dev_attrib_unmap_granularity_alignment.attr, 769 NULL, 770 }; 771 772 static struct configfs_item_operations target_core_dev_attrib_ops = { 773 .show_attribute = target_core_dev_attrib_attr_show, 774 .store_attribute = target_core_dev_attrib_attr_store, 775 }; 776 777 static struct config_item_type target_core_dev_attrib_cit = { 778 .ct_item_ops = &target_core_dev_attrib_ops, 779 .ct_attrs = target_core_dev_attrib_attrs, 780 .ct_owner = THIS_MODULE, 781 }; 782 783 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 784 785 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 786 787 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 788 #define SE_DEV_WWN_ATTR(_name, _mode) \ 789 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 790 __CONFIGFS_EATTR(_name, _mode, \ 791 target_core_dev_wwn_show_attr_##_name, \ 792 target_core_dev_wwn_store_attr_##_name); 793 794 #define SE_DEV_WWN_ATTR_RO(_name); \ 795 do { \ 796 static struct target_core_dev_wwn_attribute \ 797 target_core_dev_wwn_##_name = \ 798 __CONFIGFS_EATTR_RO(_name, \ 799 target_core_dev_wwn_show_attr_##_name); \ 800 } while (0); 801 802 /* 803 * VPD page 0x80 Unit serial 804 */ 805 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 806 struct t10_wwn *t10_wwn, 807 char *page) 808 { 809 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 810 struct se_device *dev; 811 812 dev = se_dev->se_dev_ptr; 813 if (!dev) 814 return -ENODEV; 815 816 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 817 &t10_wwn->unit_serial[0]); 818 } 819 820 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 821 struct t10_wwn *t10_wwn, 822 const char *page, 823 size_t count) 824 { 825 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev; 826 struct se_device *dev; 827 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 828 829 /* 830 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 831 * from the struct scsi_device level firmware, do not allow 832 * VPD Unit Serial to be emulated. 833 * 834 * Note this struct scsi_device could also be emulating VPD 835 * information from its drivers/scsi LLD. But for now we assume 836 * it is doing 'the right thing' wrt a world wide unique 837 * VPD Unit Serial Number that OS dependent multipath can depend on. 838 */ 839 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) { 840 pr_err("Underlying SCSI device firmware provided VPD" 841 " Unit Serial, ignoring request\n"); 842 return -EOPNOTSUPP; 843 } 844 845 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 846 pr_err("Emulated VPD Unit Serial exceeds" 847 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 848 return -EOVERFLOW; 849 } 850 /* 851 * Check to see if any active $FABRIC_MOD exports exist. If they 852 * do exist, fail here as changing this information on the fly 853 * (underneath the initiator side OS dependent multipath code) 854 * could cause negative effects. 855 */ 856 dev = su_dev->se_dev_ptr; 857 if (dev) { 858 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 859 pr_err("Unable to set VPD Unit Serial while" 860 " active %d $FABRIC_MOD exports exist\n", 861 atomic_read(&dev->dev_export_obj.obj_access_count)); 862 return -EINVAL; 863 } 864 } 865 /* 866 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 867 * 868 * Also, strip any newline added from the userspace 869 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 870 */ 871 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 872 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 873 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 874 "%s", strstrip(buf)); 875 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL; 876 877 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 878 " %s\n", su_dev->t10_wwn.unit_serial); 879 880 return count; 881 } 882 883 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 884 885 /* 886 * VPD page 0x83 Protocol Identifier 887 */ 888 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 889 struct t10_wwn *t10_wwn, 890 char *page) 891 { 892 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 893 struct se_device *dev; 894 struct t10_vpd *vpd; 895 unsigned char buf[VPD_TMP_BUF_SIZE]; 896 ssize_t len = 0; 897 898 dev = se_dev->se_dev_ptr; 899 if (!dev) 900 return -ENODEV; 901 902 memset(buf, 0, VPD_TMP_BUF_SIZE); 903 904 spin_lock(&t10_wwn->t10_vpd_lock); 905 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 906 if (!vpd->protocol_identifier_set) 907 continue; 908 909 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 910 911 if (len + strlen(buf) >= PAGE_SIZE) 912 break; 913 914 len += sprintf(page+len, "%s", buf); 915 } 916 spin_unlock(&t10_wwn->t10_vpd_lock); 917 918 return len; 919 } 920 921 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 922 struct t10_wwn *t10_wwn, 923 const char *page, 924 size_t count) 925 { 926 return -ENOSYS; 927 } 928 929 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 930 931 /* 932 * Generic wrapper for dumping VPD identifiers by association. 933 */ 934 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 935 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 936 struct t10_wwn *t10_wwn, \ 937 char *page) \ 938 { \ 939 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \ 940 struct se_device *dev; \ 941 struct t10_vpd *vpd; \ 942 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 943 ssize_t len = 0; \ 944 \ 945 dev = se_dev->se_dev_ptr; \ 946 if (!dev) \ 947 return -ENODEV; \ 948 \ 949 spin_lock(&t10_wwn->t10_vpd_lock); \ 950 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 951 if (vpd->association != _assoc) \ 952 continue; \ 953 \ 954 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 955 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 956 if (len + strlen(buf) >= PAGE_SIZE) \ 957 break; \ 958 len += sprintf(page+len, "%s", buf); \ 959 \ 960 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 961 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 962 if (len + strlen(buf) >= PAGE_SIZE) \ 963 break; \ 964 len += sprintf(page+len, "%s", buf); \ 965 \ 966 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 967 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 968 if (len + strlen(buf) >= PAGE_SIZE) \ 969 break; \ 970 len += sprintf(page+len, "%s", buf); \ 971 } \ 972 spin_unlock(&t10_wwn->t10_vpd_lock); \ 973 \ 974 return len; \ 975 } 976 977 /* 978 * VPD page 0x83 Association: Logical Unit 979 */ 980 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 981 982 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 983 struct t10_wwn *t10_wwn, 984 const char *page, 985 size_t count) 986 { 987 return -ENOSYS; 988 } 989 990 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 991 992 /* 993 * VPD page 0x83 Association: Target Port 994 */ 995 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 996 997 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 998 struct t10_wwn *t10_wwn, 999 const char *page, 1000 size_t count) 1001 { 1002 return -ENOSYS; 1003 } 1004 1005 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 1006 1007 /* 1008 * VPD page 0x83 Association: SCSI Target Device 1009 */ 1010 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1011 1012 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 1013 struct t10_wwn *t10_wwn, 1014 const char *page, 1015 size_t count) 1016 { 1017 return -ENOSYS; 1018 } 1019 1020 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 1021 1022 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 1023 1024 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1025 &target_core_dev_wwn_vpd_unit_serial.attr, 1026 &target_core_dev_wwn_vpd_protocol_identifier.attr, 1027 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 1028 &target_core_dev_wwn_vpd_assoc_target_port.attr, 1029 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 1030 NULL, 1031 }; 1032 1033 static struct configfs_item_operations target_core_dev_wwn_ops = { 1034 .show_attribute = target_core_dev_wwn_attr_show, 1035 .store_attribute = target_core_dev_wwn_attr_store, 1036 }; 1037 1038 static struct config_item_type target_core_dev_wwn_cit = { 1039 .ct_item_ops = &target_core_dev_wwn_ops, 1040 .ct_attrs = target_core_dev_wwn_attrs, 1041 .ct_owner = THIS_MODULE, 1042 }; 1043 1044 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 1045 1046 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 1047 1048 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev); 1049 #define SE_DEV_PR_ATTR(_name, _mode) \ 1050 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1051 __CONFIGFS_EATTR(_name, _mode, \ 1052 target_core_dev_pr_show_attr_##_name, \ 1053 target_core_dev_pr_store_attr_##_name); 1054 1055 #define SE_DEV_PR_ATTR_RO(_name); \ 1056 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1057 __CONFIGFS_EATTR_RO(_name, \ 1058 target_core_dev_pr_show_attr_##_name); 1059 1060 /* 1061 * res_holder 1062 */ 1063 static ssize_t target_core_dev_pr_show_spc3_res( 1064 struct se_device *dev, 1065 char *page, 1066 ssize_t *len) 1067 { 1068 struct se_node_acl *se_nacl; 1069 struct t10_pr_registration *pr_reg; 1070 char i_buf[PR_REG_ISID_ID_LEN]; 1071 int prf_isid; 1072 1073 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1074 1075 spin_lock(&dev->dev_reservation_lock); 1076 pr_reg = dev->dev_pr_res_holder; 1077 if (!pr_reg) { 1078 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n"); 1079 spin_unlock(&dev->dev_reservation_lock); 1080 return *len; 1081 } 1082 se_nacl = pr_reg->pr_reg_nacl; 1083 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1084 PR_REG_ISID_ID_LEN); 1085 1086 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n", 1087 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1088 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 1089 spin_unlock(&dev->dev_reservation_lock); 1090 1091 return *len; 1092 } 1093 1094 static ssize_t target_core_dev_pr_show_spc2_res( 1095 struct se_device *dev, 1096 char *page, 1097 ssize_t *len) 1098 { 1099 struct se_node_acl *se_nacl; 1100 1101 spin_lock(&dev->dev_reservation_lock); 1102 se_nacl = dev->dev_reserved_node_acl; 1103 if (!se_nacl) { 1104 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n"); 1105 spin_unlock(&dev->dev_reservation_lock); 1106 return *len; 1107 } 1108 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n", 1109 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1110 se_nacl->initiatorname); 1111 spin_unlock(&dev->dev_reservation_lock); 1112 1113 return *len; 1114 } 1115 1116 static ssize_t target_core_dev_pr_show_attr_res_holder( 1117 struct se_subsystem_dev *su_dev, 1118 char *page) 1119 { 1120 ssize_t len = 0; 1121 1122 if (!su_dev->se_dev_ptr) 1123 return -ENODEV; 1124 1125 switch (su_dev->t10_pr.res_type) { 1126 case SPC3_PERSISTENT_RESERVATIONS: 1127 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr, 1128 page, &len); 1129 break; 1130 case SPC2_RESERVATIONS: 1131 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr, 1132 page, &len); 1133 break; 1134 case SPC_PASSTHROUGH: 1135 len += sprintf(page+len, "Passthrough\n"); 1136 break; 1137 default: 1138 len += sprintf(page+len, "Unknown\n"); 1139 break; 1140 } 1141 1142 return len; 1143 } 1144 1145 SE_DEV_PR_ATTR_RO(res_holder); 1146 1147 /* 1148 * res_pr_all_tgt_pts 1149 */ 1150 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1151 struct se_subsystem_dev *su_dev, 1152 char *page) 1153 { 1154 struct se_device *dev; 1155 struct t10_pr_registration *pr_reg; 1156 ssize_t len = 0; 1157 1158 dev = su_dev->se_dev_ptr; 1159 if (!dev) 1160 return -ENODEV; 1161 1162 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1163 return len; 1164 1165 spin_lock(&dev->dev_reservation_lock); 1166 pr_reg = dev->dev_pr_res_holder; 1167 if (!pr_reg) { 1168 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1169 spin_unlock(&dev->dev_reservation_lock); 1170 return len; 1171 } 1172 /* 1173 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3 1174 * Basic PERSISTENT RESERVER OUT parameter list, page 290 1175 */ 1176 if (pr_reg->pr_reg_all_tg_pt) 1177 len = sprintf(page, "SPC-3 Reservation: All Target" 1178 " Ports registration\n"); 1179 else 1180 len = sprintf(page, "SPC-3 Reservation: Single" 1181 " Target Port registration\n"); 1182 spin_unlock(&dev->dev_reservation_lock); 1183 1184 return len; 1185 } 1186 1187 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1188 1189 /* 1190 * res_pr_generation 1191 */ 1192 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1193 struct se_subsystem_dev *su_dev, 1194 char *page) 1195 { 1196 if (!su_dev->se_dev_ptr) 1197 return -ENODEV; 1198 1199 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1200 return 0; 1201 1202 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation); 1203 } 1204 1205 SE_DEV_PR_ATTR_RO(res_pr_generation); 1206 1207 /* 1208 * res_pr_holder_tg_port 1209 */ 1210 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1211 struct se_subsystem_dev *su_dev, 1212 char *page) 1213 { 1214 struct se_device *dev; 1215 struct se_node_acl *se_nacl; 1216 struct se_lun *lun; 1217 struct se_portal_group *se_tpg; 1218 struct t10_pr_registration *pr_reg; 1219 struct target_core_fabric_ops *tfo; 1220 ssize_t len = 0; 1221 1222 dev = su_dev->se_dev_ptr; 1223 if (!dev) 1224 return -ENODEV; 1225 1226 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1227 return len; 1228 1229 spin_lock(&dev->dev_reservation_lock); 1230 pr_reg = dev->dev_pr_res_holder; 1231 if (!pr_reg) { 1232 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1233 spin_unlock(&dev->dev_reservation_lock); 1234 return len; 1235 } 1236 se_nacl = pr_reg->pr_reg_nacl; 1237 se_tpg = se_nacl->se_tpg; 1238 lun = pr_reg->pr_reg_tg_pt_lun; 1239 tfo = se_tpg->se_tpg_tfo; 1240 1241 len += sprintf(page+len, "SPC-3 Reservation: %s" 1242 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1243 tfo->tpg_get_wwn(se_tpg)); 1244 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1245 " Identifer Tag: %hu %s Portal Group Tag: %hu" 1246 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1247 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1248 tfo->get_fabric_name(), lun->unpacked_lun); 1249 spin_unlock(&dev->dev_reservation_lock); 1250 1251 return len; 1252 } 1253 1254 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1255 1256 /* 1257 * res_pr_registered_i_pts 1258 */ 1259 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1260 struct se_subsystem_dev *su_dev, 1261 char *page) 1262 { 1263 struct target_core_fabric_ops *tfo; 1264 struct t10_pr_registration *pr_reg; 1265 unsigned char buf[384]; 1266 char i_buf[PR_REG_ISID_ID_LEN]; 1267 ssize_t len = 0; 1268 int reg_count = 0, prf_isid; 1269 1270 if (!su_dev->se_dev_ptr) 1271 return -ENODEV; 1272 1273 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1274 return len; 1275 1276 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1277 1278 spin_lock(&su_dev->t10_pr.registration_lock); 1279 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, 1280 pr_reg_list) { 1281 1282 memset(buf, 0, 384); 1283 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1284 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1285 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1286 PR_REG_ISID_ID_LEN); 1287 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1288 tfo->get_fabric_name(), 1289 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ? 1290 &i_buf[0] : "", pr_reg->pr_res_key, 1291 pr_reg->pr_res_generation); 1292 1293 if (len + strlen(buf) >= PAGE_SIZE) 1294 break; 1295 1296 len += sprintf(page+len, "%s", buf); 1297 reg_count++; 1298 } 1299 spin_unlock(&su_dev->t10_pr.registration_lock); 1300 1301 if (!reg_count) 1302 len += sprintf(page+len, "None\n"); 1303 1304 return len; 1305 } 1306 1307 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1308 1309 /* 1310 * res_pr_type 1311 */ 1312 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1313 struct se_subsystem_dev *su_dev, 1314 char *page) 1315 { 1316 struct se_device *dev; 1317 struct t10_pr_registration *pr_reg; 1318 ssize_t len = 0; 1319 1320 dev = su_dev->se_dev_ptr; 1321 if (!dev) 1322 return -ENODEV; 1323 1324 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1325 return len; 1326 1327 spin_lock(&dev->dev_reservation_lock); 1328 pr_reg = dev->dev_pr_res_holder; 1329 if (!pr_reg) { 1330 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1331 spin_unlock(&dev->dev_reservation_lock); 1332 return len; 1333 } 1334 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1335 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1336 spin_unlock(&dev->dev_reservation_lock); 1337 1338 return len; 1339 } 1340 1341 SE_DEV_PR_ATTR_RO(res_pr_type); 1342 1343 /* 1344 * res_type 1345 */ 1346 static ssize_t target_core_dev_pr_show_attr_res_type( 1347 struct se_subsystem_dev *su_dev, 1348 char *page) 1349 { 1350 ssize_t len = 0; 1351 1352 if (!su_dev->se_dev_ptr) 1353 return -ENODEV; 1354 1355 switch (su_dev->t10_pr.res_type) { 1356 case SPC3_PERSISTENT_RESERVATIONS: 1357 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1358 break; 1359 case SPC2_RESERVATIONS: 1360 len = sprintf(page, "SPC2_RESERVATIONS\n"); 1361 break; 1362 case SPC_PASSTHROUGH: 1363 len = sprintf(page, "SPC_PASSTHROUGH\n"); 1364 break; 1365 default: 1366 len = sprintf(page, "UNKNOWN\n"); 1367 break; 1368 } 1369 1370 return len; 1371 } 1372 1373 SE_DEV_PR_ATTR_RO(res_type); 1374 1375 /* 1376 * res_aptpl_active 1377 */ 1378 1379 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1380 struct se_subsystem_dev *su_dev, 1381 char *page) 1382 { 1383 if (!su_dev->se_dev_ptr) 1384 return -ENODEV; 1385 1386 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1387 return 0; 1388 1389 return sprintf(page, "APTPL Bit Status: %s\n", 1390 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1391 } 1392 1393 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1394 1395 /* 1396 * res_aptpl_metadata 1397 */ 1398 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1399 struct se_subsystem_dev *su_dev, 1400 char *page) 1401 { 1402 if (!su_dev->se_dev_ptr) 1403 return -ENODEV; 1404 1405 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1406 return 0; 1407 1408 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1409 } 1410 1411 enum { 1412 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1413 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1414 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1415 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1416 }; 1417 1418 static match_table_t tokens = { 1419 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1420 {Opt_initiator_node, "initiator_node=%s"}, 1421 {Opt_initiator_sid, "initiator_sid=%s"}, 1422 {Opt_sa_res_key, "sa_res_key=%s"}, 1423 {Opt_res_holder, "res_holder=%d"}, 1424 {Opt_res_type, "res_type=%d"}, 1425 {Opt_res_scope, "res_scope=%d"}, 1426 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1427 {Opt_mapped_lun, "mapped_lun=%d"}, 1428 {Opt_target_fabric, "target_fabric=%s"}, 1429 {Opt_target_node, "target_node=%s"}, 1430 {Opt_tpgt, "tpgt=%d"}, 1431 {Opt_port_rtpi, "port_rtpi=%d"}, 1432 {Opt_target_lun, "target_lun=%d"}, 1433 {Opt_err, NULL} 1434 }; 1435 1436 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1437 struct se_subsystem_dev *su_dev, 1438 const char *page, 1439 size_t count) 1440 { 1441 struct se_device *dev; 1442 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1443 unsigned char *t_fabric = NULL, *t_port = NULL; 1444 char *orig, *ptr, *arg_p, *opts; 1445 substring_t args[MAX_OPT_ARGS]; 1446 unsigned long long tmp_ll; 1447 u64 sa_res_key = 0; 1448 u32 mapped_lun = 0, target_lun = 0; 1449 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1450 u16 port_rpti = 0, tpgt = 0; 1451 u8 type = 0, scope; 1452 1453 dev = su_dev->se_dev_ptr; 1454 if (!dev) 1455 return -ENODEV; 1456 1457 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1458 return 0; 1459 1460 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1461 pr_debug("Unable to process APTPL metadata while" 1462 " active fabric exports exist\n"); 1463 return -EINVAL; 1464 } 1465 1466 opts = kstrdup(page, GFP_KERNEL); 1467 if (!opts) 1468 return -ENOMEM; 1469 1470 orig = opts; 1471 while ((ptr = strsep(&opts, ",")) != NULL) { 1472 if (!*ptr) 1473 continue; 1474 1475 token = match_token(ptr, tokens, args); 1476 switch (token) { 1477 case Opt_initiator_fabric: 1478 i_fabric = match_strdup(&args[0]); 1479 if (!i_fabric) { 1480 ret = -ENOMEM; 1481 goto out; 1482 } 1483 break; 1484 case Opt_initiator_node: 1485 i_port = match_strdup(&args[0]); 1486 if (!i_port) { 1487 ret = -ENOMEM; 1488 goto out; 1489 } 1490 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1491 pr_err("APTPL metadata initiator_node=" 1492 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1493 PR_APTPL_MAX_IPORT_LEN); 1494 ret = -EINVAL; 1495 break; 1496 } 1497 break; 1498 case Opt_initiator_sid: 1499 isid = match_strdup(&args[0]); 1500 if (!isid) { 1501 ret = -ENOMEM; 1502 goto out; 1503 } 1504 if (strlen(isid) >= PR_REG_ISID_LEN) { 1505 pr_err("APTPL metadata initiator_isid" 1506 "= exceeds PR_REG_ISID_LEN: %d\n", 1507 PR_REG_ISID_LEN); 1508 ret = -EINVAL; 1509 break; 1510 } 1511 break; 1512 case Opt_sa_res_key: 1513 arg_p = match_strdup(&args[0]); 1514 if (!arg_p) { 1515 ret = -ENOMEM; 1516 goto out; 1517 } 1518 ret = strict_strtoull(arg_p, 0, &tmp_ll); 1519 if (ret < 0) { 1520 pr_err("strict_strtoull() failed for" 1521 " sa_res_key=\n"); 1522 goto out; 1523 } 1524 sa_res_key = (u64)tmp_ll; 1525 break; 1526 /* 1527 * PR APTPL Metadata for Reservation 1528 */ 1529 case Opt_res_holder: 1530 match_int(args, &arg); 1531 res_holder = arg; 1532 break; 1533 case Opt_res_type: 1534 match_int(args, &arg); 1535 type = (u8)arg; 1536 break; 1537 case Opt_res_scope: 1538 match_int(args, &arg); 1539 scope = (u8)arg; 1540 break; 1541 case Opt_res_all_tg_pt: 1542 match_int(args, &arg); 1543 all_tg_pt = (int)arg; 1544 break; 1545 case Opt_mapped_lun: 1546 match_int(args, &arg); 1547 mapped_lun = (u32)arg; 1548 break; 1549 /* 1550 * PR APTPL Metadata for Target Port 1551 */ 1552 case Opt_target_fabric: 1553 t_fabric = match_strdup(&args[0]); 1554 if (!t_fabric) { 1555 ret = -ENOMEM; 1556 goto out; 1557 } 1558 break; 1559 case Opt_target_node: 1560 t_port = match_strdup(&args[0]); 1561 if (!t_port) { 1562 ret = -ENOMEM; 1563 goto out; 1564 } 1565 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1566 pr_err("APTPL metadata target_node=" 1567 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1568 PR_APTPL_MAX_TPORT_LEN); 1569 ret = -EINVAL; 1570 break; 1571 } 1572 break; 1573 case Opt_tpgt: 1574 match_int(args, &arg); 1575 tpgt = (u16)arg; 1576 break; 1577 case Opt_port_rtpi: 1578 match_int(args, &arg); 1579 port_rpti = (u16)arg; 1580 break; 1581 case Opt_target_lun: 1582 match_int(args, &arg); 1583 target_lun = (u32)arg; 1584 break; 1585 default: 1586 break; 1587 } 1588 } 1589 1590 if (!i_port || !t_port || !sa_res_key) { 1591 pr_err("Illegal parameters for APTPL registration\n"); 1592 ret = -EINVAL; 1593 goto out; 1594 } 1595 1596 if (res_holder && !(type)) { 1597 pr_err("Illegal PR type: 0x%02x for reservation" 1598 " holder\n", type); 1599 ret = -EINVAL; 1600 goto out; 1601 } 1602 1603 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key, 1604 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1605 res_holder, all_tg_pt, type); 1606 out: 1607 kfree(i_fabric); 1608 kfree(i_port); 1609 kfree(isid); 1610 kfree(t_fabric); 1611 kfree(t_port); 1612 kfree(orig); 1613 return (ret == 0) ? count : ret; 1614 } 1615 1616 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1617 1618 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group); 1619 1620 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1621 &target_core_dev_pr_res_holder.attr, 1622 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1623 &target_core_dev_pr_res_pr_generation.attr, 1624 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1625 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1626 &target_core_dev_pr_res_pr_type.attr, 1627 &target_core_dev_pr_res_type.attr, 1628 &target_core_dev_pr_res_aptpl_active.attr, 1629 &target_core_dev_pr_res_aptpl_metadata.attr, 1630 NULL, 1631 }; 1632 1633 static struct configfs_item_operations target_core_dev_pr_ops = { 1634 .show_attribute = target_core_dev_pr_attr_show, 1635 .store_attribute = target_core_dev_pr_attr_store, 1636 }; 1637 1638 static struct config_item_type target_core_dev_pr_cit = { 1639 .ct_item_ops = &target_core_dev_pr_ops, 1640 .ct_attrs = target_core_dev_pr_attrs, 1641 .ct_owner = THIS_MODULE, 1642 }; 1643 1644 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1645 1646 /* Start functions for struct config_item_type target_core_dev_cit */ 1647 1648 static ssize_t target_core_show_dev_info(void *p, char *page) 1649 { 1650 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1651 struct se_hba *hba = se_dev->se_dev_hba; 1652 struct se_subsystem_api *t = hba->transport; 1653 int bl = 0; 1654 ssize_t read_bytes = 0; 1655 1656 if (!se_dev->se_dev_ptr) 1657 return -ENODEV; 1658 1659 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl); 1660 read_bytes += bl; 1661 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes); 1662 return read_bytes; 1663 } 1664 1665 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1666 .attr = { .ca_owner = THIS_MODULE, 1667 .ca_name = "info", 1668 .ca_mode = S_IRUGO }, 1669 .show = target_core_show_dev_info, 1670 .store = NULL, 1671 }; 1672 1673 static ssize_t target_core_store_dev_control( 1674 void *p, 1675 const char *page, 1676 size_t count) 1677 { 1678 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1679 struct se_hba *hba = se_dev->se_dev_hba; 1680 struct se_subsystem_api *t = hba->transport; 1681 1682 if (!se_dev->se_dev_su_ptr) { 1683 pr_err("Unable to locate struct se_subsystem_dev>se" 1684 "_dev_su_ptr\n"); 1685 return -EINVAL; 1686 } 1687 1688 return t->set_configfs_dev_params(hba, se_dev, page, count); 1689 } 1690 1691 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1692 .attr = { .ca_owner = THIS_MODULE, 1693 .ca_name = "control", 1694 .ca_mode = S_IWUSR }, 1695 .show = NULL, 1696 .store = target_core_store_dev_control, 1697 }; 1698 1699 static ssize_t target_core_show_dev_alias(void *p, char *page) 1700 { 1701 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1702 1703 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS)) 1704 return 0; 1705 1706 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias); 1707 } 1708 1709 static ssize_t target_core_store_dev_alias( 1710 void *p, 1711 const char *page, 1712 size_t count) 1713 { 1714 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1715 struct se_hba *hba = se_dev->se_dev_hba; 1716 ssize_t read_bytes; 1717 1718 if (count > (SE_DEV_ALIAS_LEN-1)) { 1719 pr_err("alias count: %d exceeds" 1720 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1721 SE_DEV_ALIAS_LEN-1); 1722 return -EINVAL; 1723 } 1724 1725 se_dev->su_dev_flags |= SDF_USING_ALIAS; 1726 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN, 1727 "%s", page); 1728 1729 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1730 config_item_name(&hba->hba_group.cg_item), 1731 config_item_name(&se_dev->se_dev_group.cg_item), 1732 se_dev->se_dev_alias); 1733 1734 return read_bytes; 1735 } 1736 1737 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1738 .attr = { .ca_owner = THIS_MODULE, 1739 .ca_name = "alias", 1740 .ca_mode = S_IRUGO | S_IWUSR }, 1741 .show = target_core_show_dev_alias, 1742 .store = target_core_store_dev_alias, 1743 }; 1744 1745 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1746 { 1747 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1748 1749 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) 1750 return 0; 1751 1752 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path); 1753 } 1754 1755 static ssize_t target_core_store_dev_udev_path( 1756 void *p, 1757 const char *page, 1758 size_t count) 1759 { 1760 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1761 struct se_hba *hba = se_dev->se_dev_hba; 1762 ssize_t read_bytes; 1763 1764 if (count > (SE_UDEV_PATH_LEN-1)) { 1765 pr_err("udev_path count: %d exceeds" 1766 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1767 SE_UDEV_PATH_LEN-1); 1768 return -EINVAL; 1769 } 1770 1771 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; 1772 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN, 1773 "%s", page); 1774 1775 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1776 config_item_name(&hba->hba_group.cg_item), 1777 config_item_name(&se_dev->se_dev_group.cg_item), 1778 se_dev->se_dev_udev_path); 1779 1780 return read_bytes; 1781 } 1782 1783 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1784 .attr = { .ca_owner = THIS_MODULE, 1785 .ca_name = "udev_path", 1786 .ca_mode = S_IRUGO | S_IWUSR }, 1787 .show = target_core_show_dev_udev_path, 1788 .store = target_core_store_dev_udev_path, 1789 }; 1790 1791 static ssize_t target_core_store_dev_enable( 1792 void *p, 1793 const char *page, 1794 size_t count) 1795 { 1796 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1797 struct se_device *dev; 1798 struct se_hba *hba = se_dev->se_dev_hba; 1799 struct se_subsystem_api *t = hba->transport; 1800 char *ptr; 1801 1802 ptr = strstr(page, "1"); 1803 if (!ptr) { 1804 pr_err("For dev_enable ops, only valid value" 1805 " is \"1\"\n"); 1806 return -EINVAL; 1807 } 1808 if (se_dev->se_dev_ptr) { 1809 pr_err("se_dev->se_dev_ptr already set for storage" 1810 " object\n"); 1811 return -EEXIST; 1812 } 1813 1814 if (t->check_configfs_dev_params(hba, se_dev) < 0) 1815 return -EINVAL; 1816 1817 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1818 if (IS_ERR(dev)) 1819 return PTR_ERR(dev); 1820 else if (!dev) 1821 return -EINVAL; 1822 1823 se_dev->se_dev_ptr = dev; 1824 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:" 1825 " %p\n", se_dev->se_dev_ptr); 1826 1827 return count; 1828 } 1829 1830 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1831 .attr = { .ca_owner = THIS_MODULE, 1832 .ca_name = "enable", 1833 .ca_mode = S_IWUSR }, 1834 .show = NULL, 1835 .store = target_core_store_dev_enable, 1836 }; 1837 1838 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1839 { 1840 struct se_device *dev; 1841 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1842 struct config_item *lu_ci; 1843 struct t10_alua_lu_gp *lu_gp; 1844 struct t10_alua_lu_gp_member *lu_gp_mem; 1845 ssize_t len = 0; 1846 1847 dev = su_dev->se_dev_ptr; 1848 if (!dev) 1849 return -ENODEV; 1850 1851 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) 1852 return len; 1853 1854 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1855 if (!lu_gp_mem) { 1856 pr_err("NULL struct se_device->dev_alua_lu_gp_mem" 1857 " pointer\n"); 1858 return -EINVAL; 1859 } 1860 1861 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1862 lu_gp = lu_gp_mem->lu_gp; 1863 if (lu_gp) { 1864 lu_ci = &lu_gp->lu_gp_group.cg_item; 1865 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1866 config_item_name(lu_ci), lu_gp->lu_gp_id); 1867 } 1868 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1869 1870 return len; 1871 } 1872 1873 static ssize_t target_core_store_alua_lu_gp( 1874 void *p, 1875 const char *page, 1876 size_t count) 1877 { 1878 struct se_device *dev; 1879 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1880 struct se_hba *hba = su_dev->se_dev_hba; 1881 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1882 struct t10_alua_lu_gp_member *lu_gp_mem; 1883 unsigned char buf[LU_GROUP_NAME_BUF]; 1884 int move = 0; 1885 1886 dev = su_dev->se_dev_ptr; 1887 if (!dev) 1888 return -ENODEV; 1889 1890 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) { 1891 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n", 1892 config_item_name(&hba->hba_group.cg_item), 1893 config_item_name(&su_dev->se_dev_group.cg_item)); 1894 return -EINVAL; 1895 } 1896 if (count > LU_GROUP_NAME_BUF) { 1897 pr_err("ALUA LU Group Alias too large!\n"); 1898 return -EINVAL; 1899 } 1900 memset(buf, 0, LU_GROUP_NAME_BUF); 1901 memcpy(buf, page, count); 1902 /* 1903 * Any ALUA logical unit alias besides "NULL" means we will be 1904 * making a new group association. 1905 */ 1906 if (strcmp(strstrip(buf), "NULL")) { 1907 /* 1908 * core_alua_get_lu_gp_by_name() will increment reference to 1909 * struct t10_alua_lu_gp. This reference is released with 1910 * core_alua_get_lu_gp_by_name below(). 1911 */ 1912 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1913 if (!lu_gp_new) 1914 return -ENODEV; 1915 } 1916 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1917 if (!lu_gp_mem) { 1918 if (lu_gp_new) 1919 core_alua_put_lu_gp_from_name(lu_gp_new); 1920 pr_err("NULL struct se_device->dev_alua_lu_gp_mem" 1921 " pointer\n"); 1922 return -EINVAL; 1923 } 1924 1925 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1926 lu_gp = lu_gp_mem->lu_gp; 1927 if (lu_gp) { 1928 /* 1929 * Clearing an existing lu_gp association, and replacing 1930 * with NULL 1931 */ 1932 if (!lu_gp_new) { 1933 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1934 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1935 " %hu\n", 1936 config_item_name(&hba->hba_group.cg_item), 1937 config_item_name(&su_dev->se_dev_group.cg_item), 1938 config_item_name(&lu_gp->lu_gp_group.cg_item), 1939 lu_gp->lu_gp_id); 1940 1941 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1942 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1943 1944 return count; 1945 } 1946 /* 1947 * Removing existing association of lu_gp_mem with lu_gp 1948 */ 1949 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1950 move = 1; 1951 } 1952 /* 1953 * Associate lu_gp_mem with lu_gp_new. 1954 */ 1955 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1956 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1957 1958 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1959 " core/alua/lu_gps/%s, ID: %hu\n", 1960 (move) ? "Moving" : "Adding", 1961 config_item_name(&hba->hba_group.cg_item), 1962 config_item_name(&su_dev->se_dev_group.cg_item), 1963 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1964 lu_gp_new->lu_gp_id); 1965 1966 core_alua_put_lu_gp_from_name(lu_gp_new); 1967 return count; 1968 } 1969 1970 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1971 .attr = { .ca_owner = THIS_MODULE, 1972 .ca_name = "alua_lu_gp", 1973 .ca_mode = S_IRUGO | S_IWUSR }, 1974 .show = target_core_show_alua_lu_gp, 1975 .store = target_core_store_alua_lu_gp, 1976 }; 1977 1978 static struct configfs_attribute *lio_core_dev_attrs[] = { 1979 &target_core_attr_dev_info.attr, 1980 &target_core_attr_dev_control.attr, 1981 &target_core_attr_dev_alias.attr, 1982 &target_core_attr_dev_udev_path.attr, 1983 &target_core_attr_dev_enable.attr, 1984 &target_core_attr_dev_alua_lu_gp.attr, 1985 NULL, 1986 }; 1987 1988 static void target_core_dev_release(struct config_item *item) 1989 { 1990 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 1991 struct se_subsystem_dev, se_dev_group); 1992 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 1993 struct se_subsystem_api *t = hba->transport; 1994 struct config_group *dev_cg = &se_dev->se_dev_group; 1995 1996 kfree(dev_cg->default_groups); 1997 /* 1998 * This pointer will set when the storage is enabled with: 1999 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable` 2000 */ 2001 if (se_dev->se_dev_ptr) { 2002 pr_debug("Target_Core_ConfigFS: Calling se_free_" 2003 "virtual_device() for se_dev_ptr: %p\n", 2004 se_dev->se_dev_ptr); 2005 2006 se_free_virtual_device(se_dev->se_dev_ptr, hba); 2007 } else { 2008 /* 2009 * Release struct se_subsystem_dev->se_dev_su_ptr.. 2010 */ 2011 pr_debug("Target_Core_ConfigFS: Calling t->free_" 2012 "device() for se_dev_su_ptr: %p\n", 2013 se_dev->se_dev_su_ptr); 2014 2015 t->free_device(se_dev->se_dev_su_ptr); 2016 } 2017 2018 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem" 2019 "_dev_t: %p\n", se_dev); 2020 kfree(se_dev); 2021 } 2022 2023 static ssize_t target_core_dev_show(struct config_item *item, 2024 struct configfs_attribute *attr, 2025 char *page) 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->show) 2034 return -EINVAL; 2035 2036 return tc_attr->show(se_dev, page); 2037 } 2038 2039 static ssize_t target_core_dev_store(struct config_item *item, 2040 struct configfs_attribute *attr, 2041 const char *page, size_t count) 2042 { 2043 struct se_subsystem_dev *se_dev = container_of( 2044 to_config_group(item), struct se_subsystem_dev, 2045 se_dev_group); 2046 struct target_core_configfs_attribute *tc_attr = container_of( 2047 attr, struct target_core_configfs_attribute, attr); 2048 2049 if (!tc_attr->store) 2050 return -EINVAL; 2051 2052 return tc_attr->store(se_dev, page, count); 2053 } 2054 2055 static struct configfs_item_operations target_core_dev_item_ops = { 2056 .release = target_core_dev_release, 2057 .show_attribute = target_core_dev_show, 2058 .store_attribute = target_core_dev_store, 2059 }; 2060 2061 static struct config_item_type target_core_dev_cit = { 2062 .ct_item_ops = &target_core_dev_item_ops, 2063 .ct_attrs = lio_core_dev_attrs, 2064 .ct_owner = THIS_MODULE, 2065 }; 2066 2067 /* End functions for struct config_item_type target_core_dev_cit */ 2068 2069 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2070 2071 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2072 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2073 static struct target_core_alua_lu_gp_attribute \ 2074 target_core_alua_lu_gp_##_name = \ 2075 __CONFIGFS_EATTR(_name, _mode, \ 2076 target_core_alua_lu_gp_show_attr_##_name, \ 2077 target_core_alua_lu_gp_store_attr_##_name); 2078 2079 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2080 static struct target_core_alua_lu_gp_attribute \ 2081 target_core_alua_lu_gp_##_name = \ 2082 __CONFIGFS_EATTR_RO(_name, \ 2083 target_core_alua_lu_gp_show_attr_##_name); 2084 2085 /* 2086 * lu_gp_id 2087 */ 2088 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2089 struct t10_alua_lu_gp *lu_gp, 2090 char *page) 2091 { 2092 if (!lu_gp->lu_gp_valid_id) 2093 return 0; 2094 2095 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2096 } 2097 2098 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2099 struct t10_alua_lu_gp *lu_gp, 2100 const char *page, 2101 size_t count) 2102 { 2103 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2104 unsigned long lu_gp_id; 2105 int ret; 2106 2107 ret = strict_strtoul(page, 0, &lu_gp_id); 2108 if (ret < 0) { 2109 pr_err("strict_strtoul() returned %d for" 2110 " lu_gp_id\n", ret); 2111 return -EINVAL; 2112 } 2113 if (lu_gp_id > 0x0000ffff) { 2114 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2115 " 0x0000ffff\n", lu_gp_id); 2116 return -EINVAL; 2117 } 2118 2119 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2120 if (ret < 0) 2121 return -EINVAL; 2122 2123 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2124 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2125 config_item_name(&alua_lu_gp_cg->cg_item), 2126 lu_gp->lu_gp_id); 2127 2128 return count; 2129 } 2130 2131 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2132 2133 /* 2134 * members 2135 */ 2136 static ssize_t target_core_alua_lu_gp_show_attr_members( 2137 struct t10_alua_lu_gp *lu_gp, 2138 char *page) 2139 { 2140 struct se_device *dev; 2141 struct se_hba *hba; 2142 struct se_subsystem_dev *su_dev; 2143 struct t10_alua_lu_gp_member *lu_gp_mem; 2144 ssize_t len = 0, cur_len; 2145 unsigned char buf[LU_GROUP_NAME_BUF]; 2146 2147 memset(buf, 0, LU_GROUP_NAME_BUF); 2148 2149 spin_lock(&lu_gp->lu_gp_lock); 2150 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2151 dev = lu_gp_mem->lu_gp_mem_dev; 2152 su_dev = dev->se_sub_dev; 2153 hba = su_dev->se_dev_hba; 2154 2155 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2156 config_item_name(&hba->hba_group.cg_item), 2157 config_item_name(&su_dev->se_dev_group.cg_item)); 2158 cur_len++; /* Extra byte for NULL terminator */ 2159 2160 if ((cur_len + len) > PAGE_SIZE) { 2161 pr_warn("Ran out of lu_gp_show_attr" 2162 "_members buffer\n"); 2163 break; 2164 } 2165 memcpy(page+len, buf, cur_len); 2166 len += cur_len; 2167 } 2168 spin_unlock(&lu_gp->lu_gp_lock); 2169 2170 return len; 2171 } 2172 2173 SE_DEV_ALUA_LU_ATTR_RO(members); 2174 2175 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2176 2177 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2178 &target_core_alua_lu_gp_lu_gp_id.attr, 2179 &target_core_alua_lu_gp_members.attr, 2180 NULL, 2181 }; 2182 2183 static void target_core_alua_lu_gp_release(struct config_item *item) 2184 { 2185 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2186 struct t10_alua_lu_gp, lu_gp_group); 2187 2188 core_alua_free_lu_gp(lu_gp); 2189 } 2190 2191 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2192 .release = target_core_alua_lu_gp_release, 2193 .show_attribute = target_core_alua_lu_gp_attr_show, 2194 .store_attribute = target_core_alua_lu_gp_attr_store, 2195 }; 2196 2197 static struct config_item_type target_core_alua_lu_gp_cit = { 2198 .ct_item_ops = &target_core_alua_lu_gp_ops, 2199 .ct_attrs = target_core_alua_lu_gp_attrs, 2200 .ct_owner = THIS_MODULE, 2201 }; 2202 2203 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2204 2205 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2206 2207 static struct config_group *target_core_alua_create_lu_gp( 2208 struct config_group *group, 2209 const char *name) 2210 { 2211 struct t10_alua_lu_gp *lu_gp; 2212 struct config_group *alua_lu_gp_cg = NULL; 2213 struct config_item *alua_lu_gp_ci = NULL; 2214 2215 lu_gp = core_alua_allocate_lu_gp(name, 0); 2216 if (IS_ERR(lu_gp)) 2217 return NULL; 2218 2219 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2220 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2221 2222 config_group_init_type_name(alua_lu_gp_cg, name, 2223 &target_core_alua_lu_gp_cit); 2224 2225 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2226 " Group: core/alua/lu_gps/%s\n", 2227 config_item_name(alua_lu_gp_ci)); 2228 2229 return alua_lu_gp_cg; 2230 2231 } 2232 2233 static void target_core_alua_drop_lu_gp( 2234 struct config_group *group, 2235 struct config_item *item) 2236 { 2237 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2238 struct t10_alua_lu_gp, lu_gp_group); 2239 2240 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2241 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2242 config_item_name(item), lu_gp->lu_gp_id); 2243 /* 2244 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2245 * -> target_core_alua_lu_gp_release() 2246 */ 2247 config_item_put(item); 2248 } 2249 2250 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2251 .make_group = &target_core_alua_create_lu_gp, 2252 .drop_item = &target_core_alua_drop_lu_gp, 2253 }; 2254 2255 static struct config_item_type target_core_alua_lu_gps_cit = { 2256 .ct_item_ops = NULL, 2257 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2258 .ct_owner = THIS_MODULE, 2259 }; 2260 2261 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2262 2263 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2264 2265 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2266 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2267 static struct target_core_alua_tg_pt_gp_attribute \ 2268 target_core_alua_tg_pt_gp_##_name = \ 2269 __CONFIGFS_EATTR(_name, _mode, \ 2270 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2271 target_core_alua_tg_pt_gp_store_attr_##_name); 2272 2273 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2274 static struct target_core_alua_tg_pt_gp_attribute \ 2275 target_core_alua_tg_pt_gp_##_name = \ 2276 __CONFIGFS_EATTR_RO(_name, \ 2277 target_core_alua_tg_pt_gp_show_attr_##_name); 2278 2279 /* 2280 * alua_access_state 2281 */ 2282 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2283 struct t10_alua_tg_pt_gp *tg_pt_gp, 2284 char *page) 2285 { 2286 return sprintf(page, "%d\n", 2287 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2288 } 2289 2290 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2291 struct t10_alua_tg_pt_gp *tg_pt_gp, 2292 const char *page, 2293 size_t count) 2294 { 2295 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev; 2296 unsigned long tmp; 2297 int new_state, ret; 2298 2299 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2300 pr_err("Unable to do implict ALUA on non valid" 2301 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2302 return -EINVAL; 2303 } 2304 2305 ret = strict_strtoul(page, 0, &tmp); 2306 if (ret < 0) { 2307 pr_err("Unable to extract new ALUA access state from" 2308 " %s\n", page); 2309 return -EINVAL; 2310 } 2311 new_state = (int)tmp; 2312 2313 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { 2314 pr_err("Unable to process implict configfs ALUA" 2315 " transition while TPGS_IMPLICT_ALUA is diabled\n"); 2316 return -EINVAL; 2317 } 2318 2319 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr, 2320 NULL, NULL, new_state, 0); 2321 return (!ret) ? count : -EINVAL; 2322 } 2323 2324 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2325 2326 /* 2327 * alua_access_status 2328 */ 2329 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2330 struct t10_alua_tg_pt_gp *tg_pt_gp, 2331 char *page) 2332 { 2333 return sprintf(page, "%s\n", 2334 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2335 } 2336 2337 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2338 struct t10_alua_tg_pt_gp *tg_pt_gp, 2339 const char *page, 2340 size_t count) 2341 { 2342 unsigned long tmp; 2343 int new_status, ret; 2344 2345 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2346 pr_err("Unable to do set ALUA access status on non" 2347 " valid tg_pt_gp ID: %hu\n", 2348 tg_pt_gp->tg_pt_gp_valid_id); 2349 return -EINVAL; 2350 } 2351 2352 ret = strict_strtoul(page, 0, &tmp); 2353 if (ret < 0) { 2354 pr_err("Unable to extract new ALUA access status" 2355 " from %s\n", page); 2356 return -EINVAL; 2357 } 2358 new_status = (int)tmp; 2359 2360 if ((new_status != ALUA_STATUS_NONE) && 2361 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && 2362 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 2363 pr_err("Illegal ALUA access status: 0x%02x\n", 2364 new_status); 2365 return -EINVAL; 2366 } 2367 2368 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2369 return count; 2370 } 2371 2372 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2373 2374 /* 2375 * alua_access_type 2376 */ 2377 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2378 struct t10_alua_tg_pt_gp *tg_pt_gp, 2379 char *page) 2380 { 2381 return core_alua_show_access_type(tg_pt_gp, page); 2382 } 2383 2384 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2385 struct t10_alua_tg_pt_gp *tg_pt_gp, 2386 const char *page, 2387 size_t count) 2388 { 2389 return core_alua_store_access_type(tg_pt_gp, page, count); 2390 } 2391 2392 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2393 2394 /* 2395 * alua_write_metadata 2396 */ 2397 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2398 struct t10_alua_tg_pt_gp *tg_pt_gp, 2399 char *page) 2400 { 2401 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2402 } 2403 2404 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2405 struct t10_alua_tg_pt_gp *tg_pt_gp, 2406 const char *page, 2407 size_t count) 2408 { 2409 unsigned long tmp; 2410 int ret; 2411 2412 ret = strict_strtoul(page, 0, &tmp); 2413 if (ret < 0) { 2414 pr_err("Unable to extract alua_write_metadata\n"); 2415 return -EINVAL; 2416 } 2417 2418 if ((tmp != 0) && (tmp != 1)) { 2419 pr_err("Illegal value for alua_write_metadata:" 2420 " %lu\n", tmp); 2421 return -EINVAL; 2422 } 2423 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2424 2425 return count; 2426 } 2427 2428 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2429 2430 2431 2432 /* 2433 * nonop_delay_msecs 2434 */ 2435 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2436 struct t10_alua_tg_pt_gp *tg_pt_gp, 2437 char *page) 2438 { 2439 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2440 2441 } 2442 2443 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2444 struct t10_alua_tg_pt_gp *tg_pt_gp, 2445 const char *page, 2446 size_t count) 2447 { 2448 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2449 } 2450 2451 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2452 2453 /* 2454 * trans_delay_msecs 2455 */ 2456 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2457 struct t10_alua_tg_pt_gp *tg_pt_gp, 2458 char *page) 2459 { 2460 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2461 } 2462 2463 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2464 struct t10_alua_tg_pt_gp *tg_pt_gp, 2465 const char *page, 2466 size_t count) 2467 { 2468 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2469 } 2470 2471 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2472 2473 /* 2474 * preferred 2475 */ 2476 2477 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2478 struct t10_alua_tg_pt_gp *tg_pt_gp, 2479 char *page) 2480 { 2481 return core_alua_show_preferred_bit(tg_pt_gp, page); 2482 } 2483 2484 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2485 struct t10_alua_tg_pt_gp *tg_pt_gp, 2486 const char *page, 2487 size_t count) 2488 { 2489 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2490 } 2491 2492 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2493 2494 /* 2495 * tg_pt_gp_id 2496 */ 2497 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2498 struct t10_alua_tg_pt_gp *tg_pt_gp, 2499 char *page) 2500 { 2501 if (!tg_pt_gp->tg_pt_gp_valid_id) 2502 return 0; 2503 2504 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2505 } 2506 2507 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2508 struct t10_alua_tg_pt_gp *tg_pt_gp, 2509 const char *page, 2510 size_t count) 2511 { 2512 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2513 unsigned long tg_pt_gp_id; 2514 int ret; 2515 2516 ret = strict_strtoul(page, 0, &tg_pt_gp_id); 2517 if (ret < 0) { 2518 pr_err("strict_strtoul() returned %d for" 2519 " tg_pt_gp_id\n", ret); 2520 return -EINVAL; 2521 } 2522 if (tg_pt_gp_id > 0x0000ffff) { 2523 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2524 " 0x0000ffff\n", tg_pt_gp_id); 2525 return -EINVAL; 2526 } 2527 2528 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2529 if (ret < 0) 2530 return -EINVAL; 2531 2532 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2533 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2534 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2535 tg_pt_gp->tg_pt_gp_id); 2536 2537 return count; 2538 } 2539 2540 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2541 2542 /* 2543 * members 2544 */ 2545 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2546 struct t10_alua_tg_pt_gp *tg_pt_gp, 2547 char *page) 2548 { 2549 struct se_port *port; 2550 struct se_portal_group *tpg; 2551 struct se_lun *lun; 2552 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2553 ssize_t len = 0, cur_len; 2554 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2555 2556 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2557 2558 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2559 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2560 tg_pt_gp_mem_list) { 2561 port = tg_pt_gp_mem->tg_pt; 2562 tpg = port->sep_tpg; 2563 lun = port->sep_lun; 2564 2565 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2566 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2567 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2568 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2569 config_item_name(&lun->lun_group.cg_item)); 2570 cur_len++; /* Extra byte for NULL terminator */ 2571 2572 if ((cur_len + len) > PAGE_SIZE) { 2573 pr_warn("Ran out of lu_gp_show_attr" 2574 "_members buffer\n"); 2575 break; 2576 } 2577 memcpy(page+len, buf, cur_len); 2578 len += cur_len; 2579 } 2580 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2581 2582 return len; 2583 } 2584 2585 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2586 2587 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2588 tg_pt_gp_group); 2589 2590 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2591 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2592 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2593 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2594 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2595 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2596 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2597 &target_core_alua_tg_pt_gp_preferred.attr, 2598 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2599 &target_core_alua_tg_pt_gp_members.attr, 2600 NULL, 2601 }; 2602 2603 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2604 { 2605 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2606 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2607 2608 core_alua_free_tg_pt_gp(tg_pt_gp); 2609 } 2610 2611 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2612 .release = target_core_alua_tg_pt_gp_release, 2613 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2614 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2615 }; 2616 2617 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2618 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2619 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2620 .ct_owner = THIS_MODULE, 2621 }; 2622 2623 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2624 2625 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2626 2627 static struct config_group *target_core_alua_create_tg_pt_gp( 2628 struct config_group *group, 2629 const char *name) 2630 { 2631 struct t10_alua *alua = container_of(group, struct t10_alua, 2632 alua_tg_pt_gps_group); 2633 struct t10_alua_tg_pt_gp *tg_pt_gp; 2634 struct se_subsystem_dev *su_dev = alua->t10_sub_dev; 2635 struct config_group *alua_tg_pt_gp_cg = NULL; 2636 struct config_item *alua_tg_pt_gp_ci = NULL; 2637 2638 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0); 2639 if (!tg_pt_gp) 2640 return NULL; 2641 2642 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2643 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2644 2645 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2646 &target_core_alua_tg_pt_gp_cit); 2647 2648 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2649 " Group: alua/tg_pt_gps/%s\n", 2650 config_item_name(alua_tg_pt_gp_ci)); 2651 2652 return alua_tg_pt_gp_cg; 2653 } 2654 2655 static void target_core_alua_drop_tg_pt_gp( 2656 struct config_group *group, 2657 struct config_item *item) 2658 { 2659 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2660 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2661 2662 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2663 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2664 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2665 /* 2666 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2667 * -> target_core_alua_tg_pt_gp_release(). 2668 */ 2669 config_item_put(item); 2670 } 2671 2672 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2673 .make_group = &target_core_alua_create_tg_pt_gp, 2674 .drop_item = &target_core_alua_drop_tg_pt_gp, 2675 }; 2676 2677 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2678 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2679 .ct_owner = THIS_MODULE, 2680 }; 2681 2682 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2683 2684 /* Start functions for struct config_item_type target_core_alua_cit */ 2685 2686 /* 2687 * target_core_alua_cit is a ConfigFS group that lives under 2688 * /sys/kernel/config/target/core/alua. There are default groups 2689 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2690 * target_core_alua_cit in target_core_init_configfs() below. 2691 */ 2692 static struct config_item_type target_core_alua_cit = { 2693 .ct_item_ops = NULL, 2694 .ct_attrs = NULL, 2695 .ct_owner = THIS_MODULE, 2696 }; 2697 2698 /* End functions for struct config_item_type target_core_alua_cit */ 2699 2700 /* Start functions for struct config_item_type target_core_stat_cit */ 2701 2702 static struct config_group *target_core_stat_mkdir( 2703 struct config_group *group, 2704 const char *name) 2705 { 2706 return ERR_PTR(-ENOSYS); 2707 } 2708 2709 static void target_core_stat_rmdir( 2710 struct config_group *group, 2711 struct config_item *item) 2712 { 2713 return; 2714 } 2715 2716 static struct configfs_group_operations target_core_stat_group_ops = { 2717 .make_group = &target_core_stat_mkdir, 2718 .drop_item = &target_core_stat_rmdir, 2719 }; 2720 2721 static struct config_item_type target_core_stat_cit = { 2722 .ct_group_ops = &target_core_stat_group_ops, 2723 .ct_owner = THIS_MODULE, 2724 }; 2725 2726 /* End functions for struct config_item_type target_core_stat_cit */ 2727 2728 /* Start functions for struct config_item_type target_core_hba_cit */ 2729 2730 static struct config_group *target_core_make_subdev( 2731 struct config_group *group, 2732 const char *name) 2733 { 2734 struct t10_alua_tg_pt_gp *tg_pt_gp; 2735 struct se_subsystem_dev *se_dev; 2736 struct se_subsystem_api *t; 2737 struct config_item *hba_ci = &group->cg_item; 2738 struct se_hba *hba = item_to_hba(hba_ci); 2739 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2740 struct config_group *dev_stat_grp = NULL; 2741 int errno = -ENOMEM, ret; 2742 2743 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2744 if (ret) 2745 return ERR_PTR(ret); 2746 /* 2747 * Locate the struct se_subsystem_api from parent's struct se_hba. 2748 */ 2749 t = hba->transport; 2750 2751 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 2752 if (!se_dev) { 2753 pr_err("Unable to allocate memory for" 2754 " struct se_subsystem_dev\n"); 2755 goto unlock; 2756 } 2757 INIT_LIST_HEAD(&se_dev->se_dev_node); 2758 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 2759 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 2760 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 2761 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 2762 spin_lock_init(&se_dev->t10_pr.registration_lock); 2763 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 2764 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 2765 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 2766 spin_lock_init(&se_dev->se_dev_lock); 2767 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 2768 se_dev->t10_wwn.t10_sub_dev = se_dev; 2769 se_dev->t10_alua.t10_sub_dev = se_dev; 2770 se_dev->se_dev_attrib.da_sub_dev = se_dev; 2771 2772 se_dev->se_dev_hba = hba; 2773 dev_cg = &se_dev->se_dev_group; 2774 2775 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7, 2776 GFP_KERNEL); 2777 if (!dev_cg->default_groups) 2778 goto out; 2779 /* 2780 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr 2781 * for ->allocate_virtdevice() 2782 * 2783 * se_dev->se_dev_ptr will be set after ->create_virtdev() 2784 * has been called successfully in the next level up in the 2785 * configfs tree for device object's struct config_group. 2786 */ 2787 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name); 2788 if (!se_dev->se_dev_su_ptr) { 2789 pr_err("Unable to locate subsystem dependent pointer" 2790 " from allocate_virtdevice()\n"); 2791 goto out; 2792 } 2793 spin_lock(&se_device_lock); 2794 list_add_tail(&se_dev->se_dev_node, &se_dev_list); 2795 spin_unlock(&se_device_lock); 2796 2797 config_group_init_type_name(&se_dev->se_dev_group, name, 2798 &target_core_dev_cit); 2799 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib", 2800 &target_core_dev_attrib_cit); 2801 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr", 2802 &target_core_dev_pr_cit); 2803 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn", 2804 &target_core_dev_wwn_cit); 2805 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group, 2806 "alua", &target_core_alua_tg_pt_gps_cit); 2807 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group, 2808 "statistics", &target_core_stat_cit); 2809 2810 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group; 2811 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group; 2812 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group; 2813 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group; 2814 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group; 2815 dev_cg->default_groups[5] = NULL; 2816 /* 2817 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2818 */ 2819 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1); 2820 if (!tg_pt_gp) 2821 goto out; 2822 2823 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; 2824 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 2825 GFP_KERNEL); 2826 if (!tg_pt_gp_cg->default_groups) { 2827 pr_err("Unable to allocate tg_pt_gp_cg->" 2828 "default_groups\n"); 2829 goto out; 2830 } 2831 2832 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2833 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2834 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2835 tg_pt_gp_cg->default_groups[1] = NULL; 2836 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2837 /* 2838 * Add core/$HBA/$DEV/statistics/ default groups 2839 */ 2840 dev_stat_grp = &se_dev->dev_stat_grps.stat_group; 2841 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4, 2842 GFP_KERNEL); 2843 if (!dev_stat_grp->default_groups) { 2844 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2845 goto out; 2846 } 2847 target_stat_setup_dev_default_groups(se_dev); 2848 2849 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:" 2850 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr); 2851 2852 mutex_unlock(&hba->hba_access_mutex); 2853 return &se_dev->se_dev_group; 2854 out: 2855 if (se_dev->t10_alua.default_tg_pt_gp) { 2856 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp); 2857 se_dev->t10_alua.default_tg_pt_gp = NULL; 2858 } 2859 if (dev_stat_grp) 2860 kfree(dev_stat_grp->default_groups); 2861 if (tg_pt_gp_cg) 2862 kfree(tg_pt_gp_cg->default_groups); 2863 if (dev_cg) 2864 kfree(dev_cg->default_groups); 2865 if (se_dev->se_dev_su_ptr) 2866 t->free_device(se_dev->se_dev_su_ptr); 2867 kfree(se_dev); 2868 unlock: 2869 mutex_unlock(&hba->hba_access_mutex); 2870 return ERR_PTR(errno); 2871 } 2872 2873 static void target_core_drop_subdev( 2874 struct config_group *group, 2875 struct config_item *item) 2876 { 2877 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 2878 struct se_subsystem_dev, se_dev_group); 2879 struct se_hba *hba; 2880 struct se_subsystem_api *t; 2881 struct config_item *df_item; 2882 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp; 2883 int i; 2884 2885 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 2886 2887 mutex_lock(&hba->hba_access_mutex); 2888 t = hba->transport; 2889 2890 spin_lock(&se_device_lock); 2891 list_del(&se_dev->se_dev_node); 2892 spin_unlock(&se_device_lock); 2893 2894 dev_stat_grp = &se_dev->dev_stat_grps.stat_group; 2895 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2896 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2897 dev_stat_grp->default_groups[i] = NULL; 2898 config_item_put(df_item); 2899 } 2900 kfree(dev_stat_grp->default_groups); 2901 2902 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; 2903 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2904 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2905 tg_pt_gp_cg->default_groups[i] = NULL; 2906 config_item_put(df_item); 2907 } 2908 kfree(tg_pt_gp_cg->default_groups); 2909 /* 2910 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2911 * directly from target_core_alua_tg_pt_gp_release(). 2912 */ 2913 se_dev->t10_alua.default_tg_pt_gp = NULL; 2914 2915 dev_cg = &se_dev->se_dev_group; 2916 for (i = 0; dev_cg->default_groups[i]; i++) { 2917 df_item = &dev_cg->default_groups[i]->cg_item; 2918 dev_cg->default_groups[i] = NULL; 2919 config_item_put(df_item); 2920 } 2921 /* 2922 * The releasing of se_dev and associated se_dev->se_dev_ptr is done 2923 * from target_core_dev_item_ops->release() ->target_core_dev_release(). 2924 */ 2925 config_item_put(item); 2926 mutex_unlock(&hba->hba_access_mutex); 2927 } 2928 2929 static struct configfs_group_operations target_core_hba_group_ops = { 2930 .make_group = target_core_make_subdev, 2931 .drop_item = target_core_drop_subdev, 2932 }; 2933 2934 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2935 #define SE_HBA_ATTR(_name, _mode) \ 2936 static struct target_core_hba_attribute \ 2937 target_core_hba_##_name = \ 2938 __CONFIGFS_EATTR(_name, _mode, \ 2939 target_core_hba_show_attr_##_name, \ 2940 target_core_hba_store_attr_##_name); 2941 2942 #define SE_HBA_ATTR_RO(_name) \ 2943 static struct target_core_hba_attribute \ 2944 target_core_hba_##_name = \ 2945 __CONFIGFS_EATTR_RO(_name, \ 2946 target_core_hba_show_attr_##_name); 2947 2948 static ssize_t target_core_hba_show_attr_hba_info( 2949 struct se_hba *hba, 2950 char *page) 2951 { 2952 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2953 hba->hba_id, hba->transport->name, 2954 TARGET_CORE_CONFIGFS_VERSION); 2955 } 2956 2957 SE_HBA_ATTR_RO(hba_info); 2958 2959 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2960 char *page) 2961 { 2962 int hba_mode = 0; 2963 2964 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2965 hba_mode = 1; 2966 2967 return sprintf(page, "%d\n", hba_mode); 2968 } 2969 2970 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2971 const char *page, size_t count) 2972 { 2973 struct se_subsystem_api *transport = hba->transport; 2974 unsigned long mode_flag; 2975 int ret; 2976 2977 if (transport->pmode_enable_hba == NULL) 2978 return -EINVAL; 2979 2980 ret = strict_strtoul(page, 0, &mode_flag); 2981 if (ret < 0) { 2982 pr_err("Unable to extract hba mode flag: %d\n", ret); 2983 return -EINVAL; 2984 } 2985 2986 spin_lock(&hba->device_lock); 2987 if (!list_empty(&hba->hba_dev_list)) { 2988 pr_err("Unable to set hba_mode with active devices\n"); 2989 spin_unlock(&hba->device_lock); 2990 return -EINVAL; 2991 } 2992 spin_unlock(&hba->device_lock); 2993 2994 ret = transport->pmode_enable_hba(hba, mode_flag); 2995 if (ret < 0) 2996 return -EINVAL; 2997 if (ret > 0) 2998 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2999 else if (ret == 0) 3000 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3001 3002 return count; 3003 } 3004 3005 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 3006 3007 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 3008 3009 static void target_core_hba_release(struct config_item *item) 3010 { 3011 struct se_hba *hba = container_of(to_config_group(item), 3012 struct se_hba, hba_group); 3013 core_delete_hba(hba); 3014 } 3015 3016 static struct configfs_attribute *target_core_hba_attrs[] = { 3017 &target_core_hba_hba_info.attr, 3018 &target_core_hba_hba_mode.attr, 3019 NULL, 3020 }; 3021 3022 static struct configfs_item_operations target_core_hba_item_ops = { 3023 .release = target_core_hba_release, 3024 .show_attribute = target_core_hba_attr_show, 3025 .store_attribute = target_core_hba_attr_store, 3026 }; 3027 3028 static struct config_item_type target_core_hba_cit = { 3029 .ct_item_ops = &target_core_hba_item_ops, 3030 .ct_group_ops = &target_core_hba_group_ops, 3031 .ct_attrs = target_core_hba_attrs, 3032 .ct_owner = THIS_MODULE, 3033 }; 3034 3035 static struct config_group *target_core_call_addhbatotarget( 3036 struct config_group *group, 3037 const char *name) 3038 { 3039 char *se_plugin_str, *str, *str2; 3040 struct se_hba *hba; 3041 char buf[TARGET_CORE_NAME_MAX_LEN]; 3042 unsigned long plugin_dep_id = 0; 3043 int ret; 3044 3045 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3046 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3047 pr_err("Passed *name strlen(): %d exceeds" 3048 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3049 TARGET_CORE_NAME_MAX_LEN); 3050 return ERR_PTR(-ENAMETOOLONG); 3051 } 3052 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3053 3054 str = strstr(buf, "_"); 3055 if (!str) { 3056 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3057 return ERR_PTR(-EINVAL); 3058 } 3059 se_plugin_str = buf; 3060 /* 3061 * Special case for subsystem plugins that have "_" in their names. 3062 * Namely rd_direct and rd_mcp.. 3063 */ 3064 str2 = strstr(str+1, "_"); 3065 if (str2) { 3066 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3067 str2++; /* Skip to start of plugin dependent ID */ 3068 str = str2; 3069 } else { 3070 *str = '\0'; /* Terminate for *se_plugin_str */ 3071 str++; /* Skip to start of plugin dependent ID */ 3072 } 3073 3074 ret = strict_strtoul(str, 0, &plugin_dep_id); 3075 if (ret < 0) { 3076 pr_err("strict_strtoul() returned %d for" 3077 " plugin_dep_id\n", ret); 3078 return ERR_PTR(-EINVAL); 3079 } 3080 /* 3081 * Load up TCM subsystem plugins if they have not already been loaded. 3082 */ 3083 if (transport_subsystem_check_init() < 0) 3084 return ERR_PTR(-EINVAL); 3085 3086 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3087 if (IS_ERR(hba)) 3088 return ERR_CAST(hba); 3089 3090 config_group_init_type_name(&hba->hba_group, name, 3091 &target_core_hba_cit); 3092 3093 return &hba->hba_group; 3094 } 3095 3096 static void target_core_call_delhbafromtarget( 3097 struct config_group *group, 3098 struct config_item *item) 3099 { 3100 /* 3101 * core_delete_hba() is called from target_core_hba_item_ops->release() 3102 * -> target_core_hba_release() 3103 */ 3104 config_item_put(item); 3105 } 3106 3107 static struct configfs_group_operations target_core_group_ops = { 3108 .make_group = target_core_call_addhbatotarget, 3109 .drop_item = target_core_call_delhbafromtarget, 3110 }; 3111 3112 static struct config_item_type target_core_cit = { 3113 .ct_item_ops = NULL, 3114 .ct_group_ops = &target_core_group_ops, 3115 .ct_attrs = NULL, 3116 .ct_owner = THIS_MODULE, 3117 }; 3118 3119 /* Stop functions for struct config_item_type target_core_hba_cit */ 3120 3121 static int __init target_core_init_configfs(void) 3122 { 3123 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3124 struct config_group *lu_gp_cg = NULL; 3125 struct configfs_subsystem *subsys; 3126 struct t10_alua_lu_gp *lu_gp; 3127 int ret; 3128 3129 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3130 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3131 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3132 3133 subsys = target_core_subsystem[0]; 3134 config_group_init(&subsys->su_group); 3135 mutex_init(&subsys->su_mutex); 3136 3137 INIT_LIST_HEAD(&g_tf_list); 3138 mutex_init(&g_tf_lock); 3139 ret = init_se_kmem_caches(); 3140 if (ret < 0) 3141 return ret; 3142 /* 3143 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3144 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3145 */ 3146 target_cg = &subsys->su_group; 3147 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3148 GFP_KERNEL); 3149 if (!target_cg->default_groups) { 3150 pr_err("Unable to allocate target_cg->default_groups\n"); 3151 goto out_global; 3152 } 3153 3154 config_group_init_type_name(&target_core_hbagroup, 3155 "core", &target_core_cit); 3156 target_cg->default_groups[0] = &target_core_hbagroup; 3157 target_cg->default_groups[1] = NULL; 3158 /* 3159 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3160 */ 3161 hba_cg = &target_core_hbagroup; 3162 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3163 GFP_KERNEL); 3164 if (!hba_cg->default_groups) { 3165 pr_err("Unable to allocate hba_cg->default_groups\n"); 3166 goto out_global; 3167 } 3168 config_group_init_type_name(&alua_group, 3169 "alua", &target_core_alua_cit); 3170 hba_cg->default_groups[0] = &alua_group; 3171 hba_cg->default_groups[1] = NULL; 3172 /* 3173 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3174 * groups under /sys/kernel/config/target/core/alua/ 3175 */ 3176 alua_cg = &alua_group; 3177 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3178 GFP_KERNEL); 3179 if (!alua_cg->default_groups) { 3180 pr_err("Unable to allocate alua_cg->default_groups\n"); 3181 goto out_global; 3182 } 3183 3184 config_group_init_type_name(&alua_lu_gps_group, 3185 "lu_gps", &target_core_alua_lu_gps_cit); 3186 alua_cg->default_groups[0] = &alua_lu_gps_group; 3187 alua_cg->default_groups[1] = NULL; 3188 /* 3189 * Add core/alua/lu_gps/default_lu_gp 3190 */ 3191 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3192 if (IS_ERR(lu_gp)) 3193 goto out_global; 3194 3195 lu_gp_cg = &alua_lu_gps_group; 3196 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3197 GFP_KERNEL); 3198 if (!lu_gp_cg->default_groups) { 3199 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3200 goto out_global; 3201 } 3202 3203 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3204 &target_core_alua_lu_gp_cit); 3205 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3206 lu_gp_cg->default_groups[1] = NULL; 3207 default_lu_gp = lu_gp; 3208 /* 3209 * Register the target_core_mod subsystem with configfs. 3210 */ 3211 ret = configfs_register_subsystem(subsys); 3212 if (ret < 0) { 3213 pr_err("Error %d while registering subsystem %s\n", 3214 ret, subsys->su_group.cg_item.ci_namebuf); 3215 goto out_global; 3216 } 3217 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3218 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3219 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3220 /* 3221 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3222 */ 3223 ret = rd_module_init(); 3224 if (ret < 0) 3225 goto out; 3226 3227 if (core_dev_setup_virtual_lun0() < 0) 3228 goto out; 3229 3230 return 0; 3231 3232 out: 3233 configfs_unregister_subsystem(subsys); 3234 core_dev_release_virtual_lun0(); 3235 rd_module_exit(); 3236 out_global: 3237 if (default_lu_gp) { 3238 core_alua_free_lu_gp(default_lu_gp); 3239 default_lu_gp = NULL; 3240 } 3241 if (lu_gp_cg) 3242 kfree(lu_gp_cg->default_groups); 3243 if (alua_cg) 3244 kfree(alua_cg->default_groups); 3245 if (hba_cg) 3246 kfree(hba_cg->default_groups); 3247 kfree(target_cg->default_groups); 3248 release_se_kmem_caches(); 3249 return ret; 3250 } 3251 3252 static void __exit target_core_exit_configfs(void) 3253 { 3254 struct configfs_subsystem *subsys; 3255 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3256 struct config_item *item; 3257 int i; 3258 3259 subsys = target_core_subsystem[0]; 3260 3261 lu_gp_cg = &alua_lu_gps_group; 3262 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3263 item = &lu_gp_cg->default_groups[i]->cg_item; 3264 lu_gp_cg->default_groups[i] = NULL; 3265 config_item_put(item); 3266 } 3267 kfree(lu_gp_cg->default_groups); 3268 lu_gp_cg->default_groups = NULL; 3269 3270 alua_cg = &alua_group; 3271 for (i = 0; alua_cg->default_groups[i]; i++) { 3272 item = &alua_cg->default_groups[i]->cg_item; 3273 alua_cg->default_groups[i] = NULL; 3274 config_item_put(item); 3275 } 3276 kfree(alua_cg->default_groups); 3277 alua_cg->default_groups = NULL; 3278 3279 hba_cg = &target_core_hbagroup; 3280 for (i = 0; hba_cg->default_groups[i]; i++) { 3281 item = &hba_cg->default_groups[i]->cg_item; 3282 hba_cg->default_groups[i] = NULL; 3283 config_item_put(item); 3284 } 3285 kfree(hba_cg->default_groups); 3286 hba_cg->default_groups = NULL; 3287 /* 3288 * We expect subsys->su_group.default_groups to be released 3289 * by configfs subsystem provider logic.. 3290 */ 3291 configfs_unregister_subsystem(subsys); 3292 kfree(subsys->su_group.default_groups); 3293 3294 core_alua_free_lu_gp(default_lu_gp); 3295 default_lu_gp = NULL; 3296 3297 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3298 " Infrastructure\n"); 3299 3300 core_dev_release_virtual_lun0(); 3301 rd_module_exit(); 3302 release_se_kmem_caches(); 3303 } 3304 3305 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3306 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3307 MODULE_LICENSE("GPL"); 3308 3309 module_init(target_core_init_configfs); 3310 module_exit(target_core_exit_configfs); 3311