1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * Copyright (c) 2008-2011 Rising Tide Systems 7 * Copyright (c) 2008-2011 Linux-iSCSI.org 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 ****************************************************************************/ 23 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <generated/utsrelease.h> 27 #include <linux/utsname.h> 28 #include <linux/init.h> 29 #include <linux/fs.h> 30 #include <linux/namei.h> 31 #include <linux/slab.h> 32 #include <linux/types.h> 33 #include <linux/delay.h> 34 #include <linux/unistd.h> 35 #include <linux/string.h> 36 #include <linux/parser.h> 37 #include <linux/syscalls.h> 38 #include <linux/configfs.h> 39 #include <linux/spinlock.h> 40 41 #include <target/target_core_base.h> 42 #include <target/target_core_device.h> 43 #include <target/target_core_transport.h> 44 #include <target/target_core_fabric_ops.h> 45 #include <target/target_core_fabric_configfs.h> 46 #include <target/target_core_configfs.h> 47 #include <target/configfs_macros.h> 48 49 #include "target_core_alua.h" 50 #include "target_core_hba.h" 51 #include "target_core_pr.h" 52 #include "target_core_rd.h" 53 #include "target_core_stat.h" 54 55 extern struct t10_alua_lu_gp *default_lu_gp; 56 57 static struct list_head g_tf_list; 58 static struct mutex g_tf_lock; 59 60 struct target_core_configfs_attribute { 61 struct configfs_attribute attr; 62 ssize_t (*show)(void *, char *); 63 ssize_t (*store)(void *, const char *, size_t); 64 }; 65 66 static struct config_group target_core_hbagroup; 67 static struct config_group alua_group; 68 static struct config_group alua_lu_gps_group; 69 70 static DEFINE_SPINLOCK(se_device_lock); 71 static LIST_HEAD(se_dev_list); 72 73 static inline struct se_hba * 74 item_to_hba(struct config_item *item) 75 { 76 return container_of(to_config_group(item), struct se_hba, hba_group); 77 } 78 79 /* 80 * Attributes for /sys/kernel/config/target/ 81 */ 82 static ssize_t target_core_attr_show(struct config_item *item, 83 struct configfs_attribute *attr, 84 char *page) 85 { 86 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 87 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 88 utsname()->sysname, utsname()->machine); 89 } 90 91 static struct configfs_item_operations target_core_fabric_item_ops = { 92 .show_attribute = target_core_attr_show, 93 }; 94 95 static struct configfs_attribute target_core_item_attr_version = { 96 .ca_owner = THIS_MODULE, 97 .ca_name = "version", 98 .ca_mode = S_IRUGO, 99 }; 100 101 static struct target_fabric_configfs *target_core_get_fabric( 102 const char *name) 103 { 104 struct target_fabric_configfs *tf; 105 106 if (!name) 107 return NULL; 108 109 mutex_lock(&g_tf_lock); 110 list_for_each_entry(tf, &g_tf_list, tf_list) { 111 if (!strcmp(tf->tf_name, name)) { 112 atomic_inc(&tf->tf_access_cnt); 113 mutex_unlock(&g_tf_lock); 114 return tf; 115 } 116 } 117 mutex_unlock(&g_tf_lock); 118 119 return NULL; 120 } 121 122 /* 123 * Called from struct target_core_group_ops->make_group() 124 */ 125 static struct config_group *target_core_register_fabric( 126 struct config_group *group, 127 const char *name) 128 { 129 struct target_fabric_configfs *tf; 130 int ret; 131 132 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 133 " %s\n", group, name); 134 /* 135 * Below are some hardcoded request_module() calls to automatically 136 * local fabric modules when the following is called: 137 * 138 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 139 * 140 * Note that this does not limit which TCM fabric module can be 141 * registered, but simply provids auto loading logic for modules with 142 * mkdir(2) system calls with known TCM fabric modules. 143 */ 144 if (!strncmp(name, "iscsi", 5)) { 145 /* 146 * Automatically load the LIO Target fabric module when the 147 * following is called: 148 * 149 * mkdir -p $CONFIGFS/target/iscsi 150 */ 151 ret = request_module("iscsi_target_mod"); 152 if (ret < 0) { 153 pr_err("request_module() failed for" 154 " iscsi_target_mod.ko: %d\n", ret); 155 return ERR_PTR(-EINVAL); 156 } 157 } else if (!strncmp(name, "loopback", 8)) { 158 /* 159 * Automatically load the tcm_loop fabric module when the 160 * following is called: 161 * 162 * mkdir -p $CONFIGFS/target/loopback 163 */ 164 ret = request_module("tcm_loop"); 165 if (ret < 0) { 166 pr_err("request_module() failed for" 167 " tcm_loop.ko: %d\n", ret); 168 return ERR_PTR(-EINVAL); 169 } 170 } 171 172 tf = target_core_get_fabric(name); 173 if (!tf) { 174 pr_err("target_core_get_fabric() failed for %s\n", 175 name); 176 return ERR_PTR(-EINVAL); 177 } 178 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 179 " %s\n", tf->tf_name); 180 /* 181 * On a successful target_core_get_fabric() look, the returned 182 * struct target_fabric_configfs *tf will contain a usage reference. 183 */ 184 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 185 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 186 187 tf->tf_group.default_groups = tf->tf_default_groups; 188 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 189 tf->tf_group.default_groups[1] = NULL; 190 191 config_group_init_type_name(&tf->tf_group, name, 192 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 193 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 194 &TF_CIT_TMPL(tf)->tfc_discovery_cit); 195 196 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 197 " %s\n", tf->tf_group.cg_item.ci_name); 198 /* 199 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 200 */ 201 tf->tf_ops.tf_subsys = tf->tf_subsys; 202 tf->tf_fabric = &tf->tf_group.cg_item; 203 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 204 " for %s\n", name); 205 206 return &tf->tf_group; 207 } 208 209 /* 210 * Called from struct target_core_group_ops->drop_item() 211 */ 212 static void target_core_deregister_fabric( 213 struct config_group *group, 214 struct config_item *item) 215 { 216 struct target_fabric_configfs *tf = container_of( 217 to_config_group(item), struct target_fabric_configfs, tf_group); 218 struct config_group *tf_group; 219 struct config_item *df_item; 220 int i; 221 222 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 223 " tf list\n", config_item_name(item)); 224 225 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 226 " %s\n", tf->tf_name); 227 atomic_dec(&tf->tf_access_cnt); 228 229 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 230 " tf->tf_fabric for %s\n", tf->tf_name); 231 tf->tf_fabric = NULL; 232 233 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 234 " %s\n", config_item_name(item)); 235 236 tf_group = &tf->tf_group; 237 for (i = 0; tf_group->default_groups[i]; i++) { 238 df_item = &tf_group->default_groups[i]->cg_item; 239 tf_group->default_groups[i] = NULL; 240 config_item_put(df_item); 241 } 242 config_item_put(item); 243 } 244 245 static struct configfs_group_operations target_core_fabric_group_ops = { 246 .make_group = &target_core_register_fabric, 247 .drop_item = &target_core_deregister_fabric, 248 }; 249 250 /* 251 * All item attributes appearing in /sys/kernel/target/ appear here. 252 */ 253 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 254 &target_core_item_attr_version, 255 NULL, 256 }; 257 258 /* 259 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 260 */ 261 static struct config_item_type target_core_fabrics_item = { 262 .ct_item_ops = &target_core_fabric_item_ops, 263 .ct_group_ops = &target_core_fabric_group_ops, 264 .ct_attrs = target_core_fabric_item_attrs, 265 .ct_owner = THIS_MODULE, 266 }; 267 268 static struct configfs_subsystem target_core_fabrics = { 269 .su_group = { 270 .cg_item = { 271 .ci_namebuf = "target", 272 .ci_type = &target_core_fabrics_item, 273 }, 274 }, 275 }; 276 277 static struct configfs_subsystem *target_core_subsystem[] = { 278 &target_core_fabrics, 279 NULL, 280 }; 281 282 /*############################################################################## 283 // Start functions called by external Target Fabrics Modules 284 //############################################################################*/ 285 286 /* 287 * First function called by fabric modules to: 288 * 289 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 290 * 2) Add struct target_fabric_configfs to g_tf_list 291 * 3) Return struct target_fabric_configfs to fabric module to be passed 292 * into target_fabric_configfs_register(). 293 */ 294 struct target_fabric_configfs *target_fabric_configfs_init( 295 struct module *fabric_mod, 296 const char *name) 297 { 298 struct target_fabric_configfs *tf; 299 300 if (!(name)) { 301 pr_err("Unable to locate passed fabric name\n"); 302 return ERR_PTR(-EINVAL); 303 } 304 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 305 pr_err("Passed name: %s exceeds TARGET_FABRIC" 306 "_NAME_SIZE\n", name); 307 return ERR_PTR(-EINVAL); 308 } 309 310 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 311 if (!tf) 312 return ERR_PTR(-ENOMEM); 313 314 INIT_LIST_HEAD(&tf->tf_list); 315 atomic_set(&tf->tf_access_cnt, 0); 316 /* 317 * Setup the default generic struct config_item_type's (cits) in 318 * struct target_fabric_configfs->tf_cit_tmpl 319 */ 320 tf->tf_module = fabric_mod; 321 target_fabric_setup_cits(tf); 322 323 tf->tf_subsys = target_core_subsystem[0]; 324 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 325 326 mutex_lock(&g_tf_lock); 327 list_add_tail(&tf->tf_list, &g_tf_list); 328 mutex_unlock(&g_tf_lock); 329 330 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 331 ">>>>>>>>>>>>>>\n"); 332 pr_debug("Initialized struct target_fabric_configfs: %p for" 333 " %s\n", tf, tf->tf_name); 334 return tf; 335 } 336 EXPORT_SYMBOL(target_fabric_configfs_init); 337 338 /* 339 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 340 */ 341 void target_fabric_configfs_free( 342 struct target_fabric_configfs *tf) 343 { 344 mutex_lock(&g_tf_lock); 345 list_del(&tf->tf_list); 346 mutex_unlock(&g_tf_lock); 347 348 kfree(tf); 349 } 350 EXPORT_SYMBOL(target_fabric_configfs_free); 351 352 /* 353 * Perform a sanity check of the passed tf->tf_ops before completing 354 * TCM fabric module registration. 355 */ 356 static int target_fabric_tf_ops_check( 357 struct target_fabric_configfs *tf) 358 { 359 struct target_core_fabric_ops *tfo = &tf->tf_ops; 360 361 if (!tfo->get_fabric_name) { 362 pr_err("Missing tfo->get_fabric_name()\n"); 363 return -EINVAL; 364 } 365 if (!tfo->get_fabric_proto_ident) { 366 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 367 return -EINVAL; 368 } 369 if (!tfo->tpg_get_wwn) { 370 pr_err("Missing tfo->tpg_get_wwn()\n"); 371 return -EINVAL; 372 } 373 if (!tfo->tpg_get_tag) { 374 pr_err("Missing tfo->tpg_get_tag()\n"); 375 return -EINVAL; 376 } 377 if (!tfo->tpg_get_default_depth) { 378 pr_err("Missing tfo->tpg_get_default_depth()\n"); 379 return -EINVAL; 380 } 381 if (!tfo->tpg_get_pr_transport_id) { 382 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 383 return -EINVAL; 384 } 385 if (!tfo->tpg_get_pr_transport_id_len) { 386 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 387 return -EINVAL; 388 } 389 if (!tfo->tpg_check_demo_mode) { 390 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 391 return -EINVAL; 392 } 393 if (!tfo->tpg_check_demo_mode_cache) { 394 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 395 return -EINVAL; 396 } 397 if (!tfo->tpg_check_demo_mode_write_protect) { 398 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 399 return -EINVAL; 400 } 401 if (!tfo->tpg_check_prod_mode_write_protect) { 402 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 403 return -EINVAL; 404 } 405 if (!tfo->tpg_alloc_fabric_acl) { 406 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 407 return -EINVAL; 408 } 409 if (!tfo->tpg_release_fabric_acl) { 410 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 411 return -EINVAL; 412 } 413 if (!tfo->tpg_get_inst_index) { 414 pr_err("Missing tfo->tpg_get_inst_index()\n"); 415 return -EINVAL; 416 } 417 if (!tfo->release_cmd) { 418 pr_err("Missing tfo->release_cmd()\n"); 419 return -EINVAL; 420 } 421 if (!tfo->shutdown_session) { 422 pr_err("Missing tfo->shutdown_session()\n"); 423 return -EINVAL; 424 } 425 if (!tfo->close_session) { 426 pr_err("Missing tfo->close_session()\n"); 427 return -EINVAL; 428 } 429 if (!tfo->stop_session) { 430 pr_err("Missing tfo->stop_session()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->fall_back_to_erl0) { 434 pr_err("Missing tfo->fall_back_to_erl0()\n"); 435 return -EINVAL; 436 } 437 if (!tfo->sess_logged_in) { 438 pr_err("Missing tfo->sess_logged_in()\n"); 439 return -EINVAL; 440 } 441 if (!tfo->sess_get_index) { 442 pr_err("Missing tfo->sess_get_index()\n"); 443 return -EINVAL; 444 } 445 if (!tfo->write_pending) { 446 pr_err("Missing tfo->write_pending()\n"); 447 return -EINVAL; 448 } 449 if (!tfo->write_pending_status) { 450 pr_err("Missing tfo->write_pending_status()\n"); 451 return -EINVAL; 452 } 453 if (!tfo->set_default_node_attributes) { 454 pr_err("Missing tfo->set_default_node_attributes()\n"); 455 return -EINVAL; 456 } 457 if (!tfo->get_task_tag) { 458 pr_err("Missing tfo->get_task_tag()\n"); 459 return -EINVAL; 460 } 461 if (!tfo->get_cmd_state) { 462 pr_err("Missing tfo->get_cmd_state()\n"); 463 return -EINVAL; 464 } 465 if (!tfo->queue_data_in) { 466 pr_err("Missing tfo->queue_data_in()\n"); 467 return -EINVAL; 468 } 469 if (!tfo->queue_status) { 470 pr_err("Missing tfo->queue_status()\n"); 471 return -EINVAL; 472 } 473 if (!tfo->queue_tm_rsp) { 474 pr_err("Missing tfo->queue_tm_rsp()\n"); 475 return -EINVAL; 476 } 477 if (!tfo->set_fabric_sense_len) { 478 pr_err("Missing tfo->set_fabric_sense_len()\n"); 479 return -EINVAL; 480 } 481 if (!tfo->get_fabric_sense_len) { 482 pr_err("Missing tfo->get_fabric_sense_len()\n"); 483 return -EINVAL; 484 } 485 if (!tfo->is_state_remove) { 486 pr_err("Missing tfo->is_state_remove()\n"); 487 return -EINVAL; 488 } 489 /* 490 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 491 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 492 * target_core_fabric_configfs.c WWN+TPG group context code. 493 */ 494 if (!tfo->fabric_make_wwn) { 495 pr_err("Missing tfo->fabric_make_wwn()\n"); 496 return -EINVAL; 497 } 498 if (!tfo->fabric_drop_wwn) { 499 pr_err("Missing tfo->fabric_drop_wwn()\n"); 500 return -EINVAL; 501 } 502 if (!tfo->fabric_make_tpg) { 503 pr_err("Missing tfo->fabric_make_tpg()\n"); 504 return -EINVAL; 505 } 506 if (!tfo->fabric_drop_tpg) { 507 pr_err("Missing tfo->fabric_drop_tpg()\n"); 508 return -EINVAL; 509 } 510 511 return 0; 512 } 513 514 /* 515 * Called 2nd from fabric module with returned parameter of 516 * struct target_fabric_configfs * from target_fabric_configfs_init(). 517 * 518 * Upon a successful registration, the new fabric's struct config_item is 519 * return. Also, a pointer to this struct is set in the passed 520 * struct target_fabric_configfs. 521 */ 522 int target_fabric_configfs_register( 523 struct target_fabric_configfs *tf) 524 { 525 int ret; 526 527 if (!tf) { 528 pr_err("Unable to locate target_fabric_configfs" 529 " pointer\n"); 530 return -EINVAL; 531 } 532 if (!tf->tf_subsys) { 533 pr_err("Unable to target struct config_subsystem" 534 " pointer\n"); 535 return -EINVAL; 536 } 537 ret = target_fabric_tf_ops_check(tf); 538 if (ret < 0) 539 return ret; 540 541 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 542 ">>>>>>>>>>\n"); 543 return 0; 544 } 545 EXPORT_SYMBOL(target_fabric_configfs_register); 546 547 void target_fabric_configfs_deregister( 548 struct target_fabric_configfs *tf) 549 { 550 struct configfs_subsystem *su; 551 552 if (!tf) { 553 pr_err("Unable to locate passed target_fabric_" 554 "configfs\n"); 555 return; 556 } 557 su = tf->tf_subsys; 558 if (!su) { 559 pr_err("Unable to locate passed tf->tf_subsys" 560 " pointer\n"); 561 return; 562 } 563 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 564 ">>>>>>>>>>>>\n"); 565 mutex_lock(&g_tf_lock); 566 if (atomic_read(&tf->tf_access_cnt)) { 567 mutex_unlock(&g_tf_lock); 568 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 569 tf->tf_name); 570 BUG(); 571 } 572 list_del(&tf->tf_list); 573 mutex_unlock(&g_tf_lock); 574 575 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 576 " %s\n", tf->tf_name); 577 tf->tf_module = NULL; 578 tf->tf_subsys = NULL; 579 kfree(tf); 580 581 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 582 ">>>>>\n"); 583 } 584 EXPORT_SYMBOL(target_fabric_configfs_deregister); 585 586 /*############################################################################## 587 // Stop functions called by external Target Fabrics Modules 588 //############################################################################*/ 589 590 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 591 592 #define DEF_DEV_ATTRIB_SHOW(_name) \ 593 static ssize_t target_core_dev_show_attr_##_name( \ 594 struct se_dev_attrib *da, \ 595 char *page) \ 596 { \ 597 struct se_device *dev; \ 598 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 599 ssize_t rb; \ 600 \ 601 spin_lock(&se_dev->se_dev_lock); \ 602 dev = se_dev->se_dev_ptr; \ 603 if (!dev) { \ 604 spin_unlock(&se_dev->se_dev_lock); \ 605 return -ENODEV; \ 606 } \ 607 rb = snprintf(page, PAGE_SIZE, "%u\n", \ 608 (u32)dev->se_sub_dev->se_dev_attrib._name); \ 609 spin_unlock(&se_dev->se_dev_lock); \ 610 \ 611 return rb; \ 612 } 613 614 #define DEF_DEV_ATTRIB_STORE(_name) \ 615 static ssize_t target_core_dev_store_attr_##_name( \ 616 struct se_dev_attrib *da, \ 617 const char *page, \ 618 size_t count) \ 619 { \ 620 struct se_device *dev; \ 621 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 622 unsigned long val; \ 623 int ret; \ 624 \ 625 spin_lock(&se_dev->se_dev_lock); \ 626 dev = se_dev->se_dev_ptr; \ 627 if (!dev) { \ 628 spin_unlock(&se_dev->se_dev_lock); \ 629 return -ENODEV; \ 630 } \ 631 ret = strict_strtoul(page, 0, &val); \ 632 if (ret < 0) { \ 633 spin_unlock(&se_dev->se_dev_lock); \ 634 pr_err("strict_strtoul() failed with" \ 635 " ret: %d\n", ret); \ 636 return -EINVAL; \ 637 } \ 638 ret = se_dev_set_##_name(dev, (u32)val); \ 639 spin_unlock(&se_dev->se_dev_lock); \ 640 \ 641 return (!ret) ? count : -EINVAL; \ 642 } 643 644 #define DEF_DEV_ATTRIB(_name) \ 645 DEF_DEV_ATTRIB_SHOW(_name); \ 646 DEF_DEV_ATTRIB_STORE(_name); 647 648 #define DEF_DEV_ATTRIB_RO(_name) \ 649 DEF_DEV_ATTRIB_SHOW(_name); 650 651 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 652 #define SE_DEV_ATTR(_name, _mode) \ 653 static struct target_core_dev_attrib_attribute \ 654 target_core_dev_attrib_##_name = \ 655 __CONFIGFS_EATTR(_name, _mode, \ 656 target_core_dev_show_attr_##_name, \ 657 target_core_dev_store_attr_##_name); 658 659 #define SE_DEV_ATTR_RO(_name); \ 660 static struct target_core_dev_attrib_attribute \ 661 target_core_dev_attrib_##_name = \ 662 __CONFIGFS_EATTR_RO(_name, \ 663 target_core_dev_show_attr_##_name); 664 665 DEF_DEV_ATTRIB(emulate_dpo); 666 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 667 668 DEF_DEV_ATTRIB(emulate_fua_write); 669 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 670 671 DEF_DEV_ATTRIB(emulate_fua_read); 672 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 673 674 DEF_DEV_ATTRIB(emulate_write_cache); 675 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 676 677 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 678 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 679 680 DEF_DEV_ATTRIB(emulate_tas); 681 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 682 683 DEF_DEV_ATTRIB(emulate_tpu); 684 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 685 686 DEF_DEV_ATTRIB(emulate_tpws); 687 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 688 689 DEF_DEV_ATTRIB(enforce_pr_isids); 690 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 691 692 DEF_DEV_ATTRIB(is_nonrot); 693 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 694 695 DEF_DEV_ATTRIB(emulate_rest_reord); 696 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 697 698 DEF_DEV_ATTRIB_RO(hw_block_size); 699 SE_DEV_ATTR_RO(hw_block_size); 700 701 DEF_DEV_ATTRIB(block_size); 702 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 703 704 DEF_DEV_ATTRIB_RO(hw_max_sectors); 705 SE_DEV_ATTR_RO(hw_max_sectors); 706 707 DEF_DEV_ATTRIB(max_sectors); 708 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR); 709 710 DEF_DEV_ATTRIB(optimal_sectors); 711 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 712 713 DEF_DEV_ATTRIB_RO(hw_queue_depth); 714 SE_DEV_ATTR_RO(hw_queue_depth); 715 716 DEF_DEV_ATTRIB(queue_depth); 717 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 718 719 DEF_DEV_ATTRIB(max_unmap_lba_count); 720 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 721 722 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 723 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 724 725 DEF_DEV_ATTRIB(unmap_granularity); 726 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 727 728 DEF_DEV_ATTRIB(unmap_granularity_alignment); 729 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 730 731 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 732 733 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 734 &target_core_dev_attrib_emulate_dpo.attr, 735 &target_core_dev_attrib_emulate_fua_write.attr, 736 &target_core_dev_attrib_emulate_fua_read.attr, 737 &target_core_dev_attrib_emulate_write_cache.attr, 738 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 739 &target_core_dev_attrib_emulate_tas.attr, 740 &target_core_dev_attrib_emulate_tpu.attr, 741 &target_core_dev_attrib_emulate_tpws.attr, 742 &target_core_dev_attrib_enforce_pr_isids.attr, 743 &target_core_dev_attrib_is_nonrot.attr, 744 &target_core_dev_attrib_emulate_rest_reord.attr, 745 &target_core_dev_attrib_hw_block_size.attr, 746 &target_core_dev_attrib_block_size.attr, 747 &target_core_dev_attrib_hw_max_sectors.attr, 748 &target_core_dev_attrib_max_sectors.attr, 749 &target_core_dev_attrib_optimal_sectors.attr, 750 &target_core_dev_attrib_hw_queue_depth.attr, 751 &target_core_dev_attrib_queue_depth.attr, 752 &target_core_dev_attrib_max_unmap_lba_count.attr, 753 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 754 &target_core_dev_attrib_unmap_granularity.attr, 755 &target_core_dev_attrib_unmap_granularity_alignment.attr, 756 NULL, 757 }; 758 759 static struct configfs_item_operations target_core_dev_attrib_ops = { 760 .show_attribute = target_core_dev_attrib_attr_show, 761 .store_attribute = target_core_dev_attrib_attr_store, 762 }; 763 764 static struct config_item_type target_core_dev_attrib_cit = { 765 .ct_item_ops = &target_core_dev_attrib_ops, 766 .ct_attrs = target_core_dev_attrib_attrs, 767 .ct_owner = THIS_MODULE, 768 }; 769 770 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 771 772 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 773 774 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 775 #define SE_DEV_WWN_ATTR(_name, _mode) \ 776 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 777 __CONFIGFS_EATTR(_name, _mode, \ 778 target_core_dev_wwn_show_attr_##_name, \ 779 target_core_dev_wwn_store_attr_##_name); 780 781 #define SE_DEV_WWN_ATTR_RO(_name); \ 782 do { \ 783 static struct target_core_dev_wwn_attribute \ 784 target_core_dev_wwn_##_name = \ 785 __CONFIGFS_EATTR_RO(_name, \ 786 target_core_dev_wwn_show_attr_##_name); \ 787 } while (0); 788 789 /* 790 * VPD page 0x80 Unit serial 791 */ 792 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 793 struct t10_wwn *t10_wwn, 794 char *page) 795 { 796 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 797 struct se_device *dev; 798 799 dev = se_dev->se_dev_ptr; 800 if (!dev) 801 return -ENODEV; 802 803 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 804 &t10_wwn->unit_serial[0]); 805 } 806 807 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 808 struct t10_wwn *t10_wwn, 809 const char *page, 810 size_t count) 811 { 812 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev; 813 struct se_device *dev; 814 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 815 816 /* 817 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 818 * from the struct scsi_device level firmware, do not allow 819 * VPD Unit Serial to be emulated. 820 * 821 * Note this struct scsi_device could also be emulating VPD 822 * information from its drivers/scsi LLD. But for now we assume 823 * it is doing 'the right thing' wrt a world wide unique 824 * VPD Unit Serial Number that OS dependent multipath can depend on. 825 */ 826 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) { 827 pr_err("Underlying SCSI device firmware provided VPD" 828 " Unit Serial, ignoring request\n"); 829 return -EOPNOTSUPP; 830 } 831 832 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 833 pr_err("Emulated VPD Unit Serial exceeds" 834 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 835 return -EOVERFLOW; 836 } 837 /* 838 * Check to see if any active $FABRIC_MOD exports exist. If they 839 * do exist, fail here as changing this information on the fly 840 * (underneath the initiator side OS dependent multipath code) 841 * could cause negative effects. 842 */ 843 dev = su_dev->se_dev_ptr; 844 if (dev) { 845 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 846 pr_err("Unable to set VPD Unit Serial while" 847 " active %d $FABRIC_MOD exports exist\n", 848 atomic_read(&dev->dev_export_obj.obj_access_count)); 849 return -EINVAL; 850 } 851 } 852 /* 853 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 854 * 855 * Also, strip any newline added from the userspace 856 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 857 */ 858 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 859 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 860 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 861 "%s", strstrip(buf)); 862 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL; 863 864 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 865 " %s\n", su_dev->t10_wwn.unit_serial); 866 867 return count; 868 } 869 870 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 871 872 /* 873 * VPD page 0x83 Protocol Identifier 874 */ 875 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 876 struct t10_wwn *t10_wwn, 877 char *page) 878 { 879 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 880 struct se_device *dev; 881 struct t10_vpd *vpd; 882 unsigned char buf[VPD_TMP_BUF_SIZE]; 883 ssize_t len = 0; 884 885 dev = se_dev->se_dev_ptr; 886 if (!dev) 887 return -ENODEV; 888 889 memset(buf, 0, VPD_TMP_BUF_SIZE); 890 891 spin_lock(&t10_wwn->t10_vpd_lock); 892 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 893 if (!vpd->protocol_identifier_set) 894 continue; 895 896 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 897 898 if (len + strlen(buf) >= PAGE_SIZE) 899 break; 900 901 len += sprintf(page+len, "%s", buf); 902 } 903 spin_unlock(&t10_wwn->t10_vpd_lock); 904 905 return len; 906 } 907 908 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 909 struct t10_wwn *t10_wwn, 910 const char *page, 911 size_t count) 912 { 913 return -ENOSYS; 914 } 915 916 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 917 918 /* 919 * Generic wrapper for dumping VPD identifiers by association. 920 */ 921 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 922 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 923 struct t10_wwn *t10_wwn, \ 924 char *page) \ 925 { \ 926 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \ 927 struct se_device *dev; \ 928 struct t10_vpd *vpd; \ 929 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 930 ssize_t len = 0; \ 931 \ 932 dev = se_dev->se_dev_ptr; \ 933 if (!dev) \ 934 return -ENODEV; \ 935 \ 936 spin_lock(&t10_wwn->t10_vpd_lock); \ 937 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 938 if (vpd->association != _assoc) \ 939 continue; \ 940 \ 941 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 942 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 943 if (len + strlen(buf) >= PAGE_SIZE) \ 944 break; \ 945 len += sprintf(page+len, "%s", buf); \ 946 \ 947 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 948 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 949 if (len + strlen(buf) >= PAGE_SIZE) \ 950 break; \ 951 len += sprintf(page+len, "%s", buf); \ 952 \ 953 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 954 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 955 if (len + strlen(buf) >= PAGE_SIZE) \ 956 break; \ 957 len += sprintf(page+len, "%s", buf); \ 958 } \ 959 spin_unlock(&t10_wwn->t10_vpd_lock); \ 960 \ 961 return len; \ 962 } 963 964 /* 965 * VPD page 0x83 Association: Logical Unit 966 */ 967 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 968 969 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 970 struct t10_wwn *t10_wwn, 971 const char *page, 972 size_t count) 973 { 974 return -ENOSYS; 975 } 976 977 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 978 979 /* 980 * VPD page 0x83 Association: Target Port 981 */ 982 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 983 984 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 985 struct t10_wwn *t10_wwn, 986 const char *page, 987 size_t count) 988 { 989 return -ENOSYS; 990 } 991 992 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 993 994 /* 995 * VPD page 0x83 Association: SCSI Target Device 996 */ 997 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 998 999 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 1000 struct t10_wwn *t10_wwn, 1001 const char *page, 1002 size_t count) 1003 { 1004 return -ENOSYS; 1005 } 1006 1007 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 1008 1009 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 1010 1011 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1012 &target_core_dev_wwn_vpd_unit_serial.attr, 1013 &target_core_dev_wwn_vpd_protocol_identifier.attr, 1014 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 1015 &target_core_dev_wwn_vpd_assoc_target_port.attr, 1016 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 1017 NULL, 1018 }; 1019 1020 static struct configfs_item_operations target_core_dev_wwn_ops = { 1021 .show_attribute = target_core_dev_wwn_attr_show, 1022 .store_attribute = target_core_dev_wwn_attr_store, 1023 }; 1024 1025 static struct config_item_type target_core_dev_wwn_cit = { 1026 .ct_item_ops = &target_core_dev_wwn_ops, 1027 .ct_attrs = target_core_dev_wwn_attrs, 1028 .ct_owner = THIS_MODULE, 1029 }; 1030 1031 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 1032 1033 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 1034 1035 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev); 1036 #define SE_DEV_PR_ATTR(_name, _mode) \ 1037 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1038 __CONFIGFS_EATTR(_name, _mode, \ 1039 target_core_dev_pr_show_attr_##_name, \ 1040 target_core_dev_pr_store_attr_##_name); 1041 1042 #define SE_DEV_PR_ATTR_RO(_name); \ 1043 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1044 __CONFIGFS_EATTR_RO(_name, \ 1045 target_core_dev_pr_show_attr_##_name); 1046 1047 /* 1048 * res_holder 1049 */ 1050 static ssize_t target_core_dev_pr_show_spc3_res( 1051 struct se_device *dev, 1052 char *page, 1053 ssize_t *len) 1054 { 1055 struct se_node_acl *se_nacl; 1056 struct t10_pr_registration *pr_reg; 1057 char i_buf[PR_REG_ISID_ID_LEN]; 1058 int prf_isid; 1059 1060 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1061 1062 spin_lock(&dev->dev_reservation_lock); 1063 pr_reg = dev->dev_pr_res_holder; 1064 if (!pr_reg) { 1065 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n"); 1066 spin_unlock(&dev->dev_reservation_lock); 1067 return *len; 1068 } 1069 se_nacl = pr_reg->pr_reg_nacl; 1070 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1071 PR_REG_ISID_ID_LEN); 1072 1073 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n", 1074 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1075 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 1076 spin_unlock(&dev->dev_reservation_lock); 1077 1078 return *len; 1079 } 1080 1081 static ssize_t target_core_dev_pr_show_spc2_res( 1082 struct se_device *dev, 1083 char *page, 1084 ssize_t *len) 1085 { 1086 struct se_node_acl *se_nacl; 1087 1088 spin_lock(&dev->dev_reservation_lock); 1089 se_nacl = dev->dev_reserved_node_acl; 1090 if (!se_nacl) { 1091 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n"); 1092 spin_unlock(&dev->dev_reservation_lock); 1093 return *len; 1094 } 1095 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n", 1096 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1097 se_nacl->initiatorname); 1098 spin_unlock(&dev->dev_reservation_lock); 1099 1100 return *len; 1101 } 1102 1103 static ssize_t target_core_dev_pr_show_attr_res_holder( 1104 struct se_subsystem_dev *su_dev, 1105 char *page) 1106 { 1107 ssize_t len = 0; 1108 1109 if (!su_dev->se_dev_ptr) 1110 return -ENODEV; 1111 1112 switch (su_dev->t10_pr.res_type) { 1113 case SPC3_PERSISTENT_RESERVATIONS: 1114 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr, 1115 page, &len); 1116 break; 1117 case SPC2_RESERVATIONS: 1118 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr, 1119 page, &len); 1120 break; 1121 case SPC_PASSTHROUGH: 1122 len += sprintf(page+len, "Passthrough\n"); 1123 break; 1124 default: 1125 len += sprintf(page+len, "Unknown\n"); 1126 break; 1127 } 1128 1129 return len; 1130 } 1131 1132 SE_DEV_PR_ATTR_RO(res_holder); 1133 1134 /* 1135 * res_pr_all_tgt_pts 1136 */ 1137 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1138 struct se_subsystem_dev *su_dev, 1139 char *page) 1140 { 1141 struct se_device *dev; 1142 struct t10_pr_registration *pr_reg; 1143 ssize_t len = 0; 1144 1145 dev = su_dev->se_dev_ptr; 1146 if (!dev) 1147 return -ENODEV; 1148 1149 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1150 return len; 1151 1152 spin_lock(&dev->dev_reservation_lock); 1153 pr_reg = dev->dev_pr_res_holder; 1154 if (!pr_reg) { 1155 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1156 spin_unlock(&dev->dev_reservation_lock); 1157 return len; 1158 } 1159 /* 1160 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3 1161 * Basic PERSISTENT RESERVER OUT parameter list, page 290 1162 */ 1163 if (pr_reg->pr_reg_all_tg_pt) 1164 len = sprintf(page, "SPC-3 Reservation: All Target" 1165 " Ports registration\n"); 1166 else 1167 len = sprintf(page, "SPC-3 Reservation: Single" 1168 " Target Port registration\n"); 1169 spin_unlock(&dev->dev_reservation_lock); 1170 1171 return len; 1172 } 1173 1174 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1175 1176 /* 1177 * res_pr_generation 1178 */ 1179 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1180 struct se_subsystem_dev *su_dev, 1181 char *page) 1182 { 1183 if (!su_dev->se_dev_ptr) 1184 return -ENODEV; 1185 1186 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1187 return 0; 1188 1189 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation); 1190 } 1191 1192 SE_DEV_PR_ATTR_RO(res_pr_generation); 1193 1194 /* 1195 * res_pr_holder_tg_port 1196 */ 1197 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1198 struct se_subsystem_dev *su_dev, 1199 char *page) 1200 { 1201 struct se_device *dev; 1202 struct se_node_acl *se_nacl; 1203 struct se_lun *lun; 1204 struct se_portal_group *se_tpg; 1205 struct t10_pr_registration *pr_reg; 1206 struct target_core_fabric_ops *tfo; 1207 ssize_t len = 0; 1208 1209 dev = su_dev->se_dev_ptr; 1210 if (!dev) 1211 return -ENODEV; 1212 1213 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1214 return len; 1215 1216 spin_lock(&dev->dev_reservation_lock); 1217 pr_reg = dev->dev_pr_res_holder; 1218 if (!pr_reg) { 1219 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1220 spin_unlock(&dev->dev_reservation_lock); 1221 return len; 1222 } 1223 se_nacl = pr_reg->pr_reg_nacl; 1224 se_tpg = se_nacl->se_tpg; 1225 lun = pr_reg->pr_reg_tg_pt_lun; 1226 tfo = se_tpg->se_tpg_tfo; 1227 1228 len += sprintf(page+len, "SPC-3 Reservation: %s" 1229 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1230 tfo->tpg_get_wwn(se_tpg)); 1231 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1232 " Identifer Tag: %hu %s Portal Group Tag: %hu" 1233 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1234 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1235 tfo->get_fabric_name(), lun->unpacked_lun); 1236 spin_unlock(&dev->dev_reservation_lock); 1237 1238 return len; 1239 } 1240 1241 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1242 1243 /* 1244 * res_pr_registered_i_pts 1245 */ 1246 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1247 struct se_subsystem_dev *su_dev, 1248 char *page) 1249 { 1250 struct target_core_fabric_ops *tfo; 1251 struct t10_pr_registration *pr_reg; 1252 unsigned char buf[384]; 1253 char i_buf[PR_REG_ISID_ID_LEN]; 1254 ssize_t len = 0; 1255 int reg_count = 0, prf_isid; 1256 1257 if (!su_dev->se_dev_ptr) 1258 return -ENODEV; 1259 1260 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1261 return len; 1262 1263 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1264 1265 spin_lock(&su_dev->t10_pr.registration_lock); 1266 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, 1267 pr_reg_list) { 1268 1269 memset(buf, 0, 384); 1270 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1271 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1272 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1273 PR_REG_ISID_ID_LEN); 1274 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1275 tfo->get_fabric_name(), 1276 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ? 1277 &i_buf[0] : "", pr_reg->pr_res_key, 1278 pr_reg->pr_res_generation); 1279 1280 if (len + strlen(buf) >= PAGE_SIZE) 1281 break; 1282 1283 len += sprintf(page+len, "%s", buf); 1284 reg_count++; 1285 } 1286 spin_unlock(&su_dev->t10_pr.registration_lock); 1287 1288 if (!reg_count) 1289 len += sprintf(page+len, "None\n"); 1290 1291 return len; 1292 } 1293 1294 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1295 1296 /* 1297 * res_pr_type 1298 */ 1299 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1300 struct se_subsystem_dev *su_dev, 1301 char *page) 1302 { 1303 struct se_device *dev; 1304 struct t10_pr_registration *pr_reg; 1305 ssize_t len = 0; 1306 1307 dev = su_dev->se_dev_ptr; 1308 if (!dev) 1309 return -ENODEV; 1310 1311 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1312 return len; 1313 1314 spin_lock(&dev->dev_reservation_lock); 1315 pr_reg = dev->dev_pr_res_holder; 1316 if (!pr_reg) { 1317 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1318 spin_unlock(&dev->dev_reservation_lock); 1319 return len; 1320 } 1321 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1322 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1323 spin_unlock(&dev->dev_reservation_lock); 1324 1325 return len; 1326 } 1327 1328 SE_DEV_PR_ATTR_RO(res_pr_type); 1329 1330 /* 1331 * res_type 1332 */ 1333 static ssize_t target_core_dev_pr_show_attr_res_type( 1334 struct se_subsystem_dev *su_dev, 1335 char *page) 1336 { 1337 ssize_t len = 0; 1338 1339 if (!su_dev->se_dev_ptr) 1340 return -ENODEV; 1341 1342 switch (su_dev->t10_pr.res_type) { 1343 case SPC3_PERSISTENT_RESERVATIONS: 1344 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1345 break; 1346 case SPC2_RESERVATIONS: 1347 len = sprintf(page, "SPC2_RESERVATIONS\n"); 1348 break; 1349 case SPC_PASSTHROUGH: 1350 len = sprintf(page, "SPC_PASSTHROUGH\n"); 1351 break; 1352 default: 1353 len = sprintf(page, "UNKNOWN\n"); 1354 break; 1355 } 1356 1357 return len; 1358 } 1359 1360 SE_DEV_PR_ATTR_RO(res_type); 1361 1362 /* 1363 * res_aptpl_active 1364 */ 1365 1366 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1367 struct se_subsystem_dev *su_dev, 1368 char *page) 1369 { 1370 if (!su_dev->se_dev_ptr) 1371 return -ENODEV; 1372 1373 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1374 return 0; 1375 1376 return sprintf(page, "APTPL Bit Status: %s\n", 1377 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1378 } 1379 1380 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1381 1382 /* 1383 * res_aptpl_metadata 1384 */ 1385 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1386 struct se_subsystem_dev *su_dev, 1387 char *page) 1388 { 1389 if (!su_dev->se_dev_ptr) 1390 return -ENODEV; 1391 1392 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1393 return 0; 1394 1395 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1396 } 1397 1398 enum { 1399 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1400 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1401 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1402 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1403 }; 1404 1405 static match_table_t tokens = { 1406 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1407 {Opt_initiator_node, "initiator_node=%s"}, 1408 {Opt_initiator_sid, "initiator_sid=%s"}, 1409 {Opt_sa_res_key, "sa_res_key=%s"}, 1410 {Opt_res_holder, "res_holder=%d"}, 1411 {Opt_res_type, "res_type=%d"}, 1412 {Opt_res_scope, "res_scope=%d"}, 1413 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1414 {Opt_mapped_lun, "mapped_lun=%d"}, 1415 {Opt_target_fabric, "target_fabric=%s"}, 1416 {Opt_target_node, "target_node=%s"}, 1417 {Opt_tpgt, "tpgt=%d"}, 1418 {Opt_port_rtpi, "port_rtpi=%d"}, 1419 {Opt_target_lun, "target_lun=%d"}, 1420 {Opt_err, NULL} 1421 }; 1422 1423 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1424 struct se_subsystem_dev *su_dev, 1425 const char *page, 1426 size_t count) 1427 { 1428 struct se_device *dev; 1429 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1430 unsigned char *t_fabric = NULL, *t_port = NULL; 1431 char *orig, *ptr, *arg_p, *opts; 1432 substring_t args[MAX_OPT_ARGS]; 1433 unsigned long long tmp_ll; 1434 u64 sa_res_key = 0; 1435 u32 mapped_lun = 0, target_lun = 0; 1436 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1437 u16 port_rpti = 0, tpgt = 0; 1438 u8 type = 0, scope; 1439 1440 dev = su_dev->se_dev_ptr; 1441 if (!dev) 1442 return -ENODEV; 1443 1444 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 1445 return 0; 1446 1447 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1448 pr_debug("Unable to process APTPL metadata while" 1449 " active fabric exports exist\n"); 1450 return -EINVAL; 1451 } 1452 1453 opts = kstrdup(page, GFP_KERNEL); 1454 if (!opts) 1455 return -ENOMEM; 1456 1457 orig = opts; 1458 while ((ptr = strsep(&opts, ",")) != NULL) { 1459 if (!*ptr) 1460 continue; 1461 1462 token = match_token(ptr, tokens, args); 1463 switch (token) { 1464 case Opt_initiator_fabric: 1465 i_fabric = match_strdup(&args[0]); 1466 if (!i_fabric) { 1467 ret = -ENOMEM; 1468 goto out; 1469 } 1470 break; 1471 case Opt_initiator_node: 1472 i_port = match_strdup(&args[0]); 1473 if (!i_port) { 1474 ret = -ENOMEM; 1475 goto out; 1476 } 1477 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1478 pr_err("APTPL metadata initiator_node=" 1479 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1480 PR_APTPL_MAX_IPORT_LEN); 1481 ret = -EINVAL; 1482 break; 1483 } 1484 break; 1485 case Opt_initiator_sid: 1486 isid = match_strdup(&args[0]); 1487 if (!isid) { 1488 ret = -ENOMEM; 1489 goto out; 1490 } 1491 if (strlen(isid) >= PR_REG_ISID_LEN) { 1492 pr_err("APTPL metadata initiator_isid" 1493 "= exceeds PR_REG_ISID_LEN: %d\n", 1494 PR_REG_ISID_LEN); 1495 ret = -EINVAL; 1496 break; 1497 } 1498 break; 1499 case Opt_sa_res_key: 1500 arg_p = match_strdup(&args[0]); 1501 if (!arg_p) { 1502 ret = -ENOMEM; 1503 goto out; 1504 } 1505 ret = strict_strtoull(arg_p, 0, &tmp_ll); 1506 if (ret < 0) { 1507 pr_err("strict_strtoull() failed for" 1508 " sa_res_key=\n"); 1509 goto out; 1510 } 1511 sa_res_key = (u64)tmp_ll; 1512 break; 1513 /* 1514 * PR APTPL Metadata for Reservation 1515 */ 1516 case Opt_res_holder: 1517 match_int(args, &arg); 1518 res_holder = arg; 1519 break; 1520 case Opt_res_type: 1521 match_int(args, &arg); 1522 type = (u8)arg; 1523 break; 1524 case Opt_res_scope: 1525 match_int(args, &arg); 1526 scope = (u8)arg; 1527 break; 1528 case Opt_res_all_tg_pt: 1529 match_int(args, &arg); 1530 all_tg_pt = (int)arg; 1531 break; 1532 case Opt_mapped_lun: 1533 match_int(args, &arg); 1534 mapped_lun = (u32)arg; 1535 break; 1536 /* 1537 * PR APTPL Metadata for Target Port 1538 */ 1539 case Opt_target_fabric: 1540 t_fabric = match_strdup(&args[0]); 1541 if (!t_fabric) { 1542 ret = -ENOMEM; 1543 goto out; 1544 } 1545 break; 1546 case Opt_target_node: 1547 t_port = match_strdup(&args[0]); 1548 if (!t_port) { 1549 ret = -ENOMEM; 1550 goto out; 1551 } 1552 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1553 pr_err("APTPL metadata target_node=" 1554 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1555 PR_APTPL_MAX_TPORT_LEN); 1556 ret = -EINVAL; 1557 break; 1558 } 1559 break; 1560 case Opt_tpgt: 1561 match_int(args, &arg); 1562 tpgt = (u16)arg; 1563 break; 1564 case Opt_port_rtpi: 1565 match_int(args, &arg); 1566 port_rpti = (u16)arg; 1567 break; 1568 case Opt_target_lun: 1569 match_int(args, &arg); 1570 target_lun = (u32)arg; 1571 break; 1572 default: 1573 break; 1574 } 1575 } 1576 1577 if (!i_port || !t_port || !sa_res_key) { 1578 pr_err("Illegal parameters for APTPL registration\n"); 1579 ret = -EINVAL; 1580 goto out; 1581 } 1582 1583 if (res_holder && !(type)) { 1584 pr_err("Illegal PR type: 0x%02x for reservation" 1585 " holder\n", type); 1586 ret = -EINVAL; 1587 goto out; 1588 } 1589 1590 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key, 1591 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1592 res_holder, all_tg_pt, type); 1593 out: 1594 kfree(i_fabric); 1595 kfree(i_port); 1596 kfree(isid); 1597 kfree(t_fabric); 1598 kfree(t_port); 1599 kfree(orig); 1600 return (ret == 0) ? count : ret; 1601 } 1602 1603 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1604 1605 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group); 1606 1607 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1608 &target_core_dev_pr_res_holder.attr, 1609 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1610 &target_core_dev_pr_res_pr_generation.attr, 1611 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1612 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1613 &target_core_dev_pr_res_pr_type.attr, 1614 &target_core_dev_pr_res_type.attr, 1615 &target_core_dev_pr_res_aptpl_active.attr, 1616 &target_core_dev_pr_res_aptpl_metadata.attr, 1617 NULL, 1618 }; 1619 1620 static struct configfs_item_operations target_core_dev_pr_ops = { 1621 .show_attribute = target_core_dev_pr_attr_show, 1622 .store_attribute = target_core_dev_pr_attr_store, 1623 }; 1624 1625 static struct config_item_type target_core_dev_pr_cit = { 1626 .ct_item_ops = &target_core_dev_pr_ops, 1627 .ct_attrs = target_core_dev_pr_attrs, 1628 .ct_owner = THIS_MODULE, 1629 }; 1630 1631 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1632 1633 /* Start functions for struct config_item_type target_core_dev_cit */ 1634 1635 static ssize_t target_core_show_dev_info(void *p, char *page) 1636 { 1637 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1638 struct se_hba *hba = se_dev->se_dev_hba; 1639 struct se_subsystem_api *t = hba->transport; 1640 int bl = 0; 1641 ssize_t read_bytes = 0; 1642 1643 if (!se_dev->se_dev_ptr) 1644 return -ENODEV; 1645 1646 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl); 1647 read_bytes += bl; 1648 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes); 1649 return read_bytes; 1650 } 1651 1652 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1653 .attr = { .ca_owner = THIS_MODULE, 1654 .ca_name = "info", 1655 .ca_mode = S_IRUGO }, 1656 .show = target_core_show_dev_info, 1657 .store = NULL, 1658 }; 1659 1660 static ssize_t target_core_store_dev_control( 1661 void *p, 1662 const char *page, 1663 size_t count) 1664 { 1665 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1666 struct se_hba *hba = se_dev->se_dev_hba; 1667 struct se_subsystem_api *t = hba->transport; 1668 1669 if (!se_dev->se_dev_su_ptr) { 1670 pr_err("Unable to locate struct se_subsystem_dev>se" 1671 "_dev_su_ptr\n"); 1672 return -EINVAL; 1673 } 1674 1675 return t->set_configfs_dev_params(hba, se_dev, page, count); 1676 } 1677 1678 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1679 .attr = { .ca_owner = THIS_MODULE, 1680 .ca_name = "control", 1681 .ca_mode = S_IWUSR }, 1682 .show = NULL, 1683 .store = target_core_store_dev_control, 1684 }; 1685 1686 static ssize_t target_core_show_dev_alias(void *p, char *page) 1687 { 1688 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1689 1690 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS)) 1691 return 0; 1692 1693 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias); 1694 } 1695 1696 static ssize_t target_core_store_dev_alias( 1697 void *p, 1698 const char *page, 1699 size_t count) 1700 { 1701 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1702 struct se_hba *hba = se_dev->se_dev_hba; 1703 ssize_t read_bytes; 1704 1705 if (count > (SE_DEV_ALIAS_LEN-1)) { 1706 pr_err("alias count: %d exceeds" 1707 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1708 SE_DEV_ALIAS_LEN-1); 1709 return -EINVAL; 1710 } 1711 1712 se_dev->su_dev_flags |= SDF_USING_ALIAS; 1713 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN, 1714 "%s", page); 1715 1716 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1717 config_item_name(&hba->hba_group.cg_item), 1718 config_item_name(&se_dev->se_dev_group.cg_item), 1719 se_dev->se_dev_alias); 1720 1721 return read_bytes; 1722 } 1723 1724 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1725 .attr = { .ca_owner = THIS_MODULE, 1726 .ca_name = "alias", 1727 .ca_mode = S_IRUGO | S_IWUSR }, 1728 .show = target_core_show_dev_alias, 1729 .store = target_core_store_dev_alias, 1730 }; 1731 1732 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1733 { 1734 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1735 1736 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) 1737 return 0; 1738 1739 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path); 1740 } 1741 1742 static ssize_t target_core_store_dev_udev_path( 1743 void *p, 1744 const char *page, 1745 size_t count) 1746 { 1747 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1748 struct se_hba *hba = se_dev->se_dev_hba; 1749 ssize_t read_bytes; 1750 1751 if (count > (SE_UDEV_PATH_LEN-1)) { 1752 pr_err("udev_path count: %d exceeds" 1753 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1754 SE_UDEV_PATH_LEN-1); 1755 return -EINVAL; 1756 } 1757 1758 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; 1759 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN, 1760 "%s", page); 1761 1762 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1763 config_item_name(&hba->hba_group.cg_item), 1764 config_item_name(&se_dev->se_dev_group.cg_item), 1765 se_dev->se_dev_udev_path); 1766 1767 return read_bytes; 1768 } 1769 1770 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1771 .attr = { .ca_owner = THIS_MODULE, 1772 .ca_name = "udev_path", 1773 .ca_mode = S_IRUGO | S_IWUSR }, 1774 .show = target_core_show_dev_udev_path, 1775 .store = target_core_store_dev_udev_path, 1776 }; 1777 1778 static ssize_t target_core_store_dev_enable( 1779 void *p, 1780 const char *page, 1781 size_t count) 1782 { 1783 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1784 struct se_device *dev; 1785 struct se_hba *hba = se_dev->se_dev_hba; 1786 struct se_subsystem_api *t = hba->transport; 1787 char *ptr; 1788 1789 ptr = strstr(page, "1"); 1790 if (!ptr) { 1791 pr_err("For dev_enable ops, only valid value" 1792 " is \"1\"\n"); 1793 return -EINVAL; 1794 } 1795 if (se_dev->se_dev_ptr) { 1796 pr_err("se_dev->se_dev_ptr already set for storage" 1797 " object\n"); 1798 return -EEXIST; 1799 } 1800 1801 if (t->check_configfs_dev_params(hba, se_dev) < 0) 1802 return -EINVAL; 1803 1804 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1805 if (IS_ERR(dev)) 1806 return PTR_ERR(dev); 1807 else if (!dev) 1808 return -EINVAL; 1809 1810 se_dev->se_dev_ptr = dev; 1811 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:" 1812 " %p\n", se_dev->se_dev_ptr); 1813 1814 return count; 1815 } 1816 1817 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1818 .attr = { .ca_owner = THIS_MODULE, 1819 .ca_name = "enable", 1820 .ca_mode = S_IWUSR }, 1821 .show = NULL, 1822 .store = target_core_store_dev_enable, 1823 }; 1824 1825 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1826 { 1827 struct se_device *dev; 1828 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1829 struct config_item *lu_ci; 1830 struct t10_alua_lu_gp *lu_gp; 1831 struct t10_alua_lu_gp_member *lu_gp_mem; 1832 ssize_t len = 0; 1833 1834 dev = su_dev->se_dev_ptr; 1835 if (!dev) 1836 return -ENODEV; 1837 1838 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) 1839 return len; 1840 1841 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1842 if (!lu_gp_mem) { 1843 pr_err("NULL struct se_device->dev_alua_lu_gp_mem" 1844 " pointer\n"); 1845 return -EINVAL; 1846 } 1847 1848 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1849 lu_gp = lu_gp_mem->lu_gp; 1850 if (lu_gp) { 1851 lu_ci = &lu_gp->lu_gp_group.cg_item; 1852 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1853 config_item_name(lu_ci), lu_gp->lu_gp_id); 1854 } 1855 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1856 1857 return len; 1858 } 1859 1860 static ssize_t target_core_store_alua_lu_gp( 1861 void *p, 1862 const char *page, 1863 size_t count) 1864 { 1865 struct se_device *dev; 1866 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1867 struct se_hba *hba = su_dev->se_dev_hba; 1868 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1869 struct t10_alua_lu_gp_member *lu_gp_mem; 1870 unsigned char buf[LU_GROUP_NAME_BUF]; 1871 int move = 0; 1872 1873 dev = su_dev->se_dev_ptr; 1874 if (!dev) 1875 return -ENODEV; 1876 1877 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) { 1878 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n", 1879 config_item_name(&hba->hba_group.cg_item), 1880 config_item_name(&su_dev->se_dev_group.cg_item)); 1881 return -EINVAL; 1882 } 1883 if (count > LU_GROUP_NAME_BUF) { 1884 pr_err("ALUA LU Group Alias too large!\n"); 1885 return -EINVAL; 1886 } 1887 memset(buf, 0, LU_GROUP_NAME_BUF); 1888 memcpy(buf, page, count); 1889 /* 1890 * Any ALUA logical unit alias besides "NULL" means we will be 1891 * making a new group association. 1892 */ 1893 if (strcmp(strstrip(buf), "NULL")) { 1894 /* 1895 * core_alua_get_lu_gp_by_name() will increment reference to 1896 * struct t10_alua_lu_gp. This reference is released with 1897 * core_alua_get_lu_gp_by_name below(). 1898 */ 1899 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1900 if (!lu_gp_new) 1901 return -ENODEV; 1902 } 1903 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1904 if (!lu_gp_mem) { 1905 if (lu_gp_new) 1906 core_alua_put_lu_gp_from_name(lu_gp_new); 1907 pr_err("NULL struct se_device->dev_alua_lu_gp_mem" 1908 " pointer\n"); 1909 return -EINVAL; 1910 } 1911 1912 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1913 lu_gp = lu_gp_mem->lu_gp; 1914 if (lu_gp) { 1915 /* 1916 * Clearing an existing lu_gp association, and replacing 1917 * with NULL 1918 */ 1919 if (!lu_gp_new) { 1920 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1921 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1922 " %hu\n", 1923 config_item_name(&hba->hba_group.cg_item), 1924 config_item_name(&su_dev->se_dev_group.cg_item), 1925 config_item_name(&lu_gp->lu_gp_group.cg_item), 1926 lu_gp->lu_gp_id); 1927 1928 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1929 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1930 1931 return count; 1932 } 1933 /* 1934 * Removing existing association of lu_gp_mem with lu_gp 1935 */ 1936 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1937 move = 1; 1938 } 1939 /* 1940 * Associate lu_gp_mem with lu_gp_new. 1941 */ 1942 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1943 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1944 1945 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1946 " core/alua/lu_gps/%s, ID: %hu\n", 1947 (move) ? "Moving" : "Adding", 1948 config_item_name(&hba->hba_group.cg_item), 1949 config_item_name(&su_dev->se_dev_group.cg_item), 1950 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1951 lu_gp_new->lu_gp_id); 1952 1953 core_alua_put_lu_gp_from_name(lu_gp_new); 1954 return count; 1955 } 1956 1957 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1958 .attr = { .ca_owner = THIS_MODULE, 1959 .ca_name = "alua_lu_gp", 1960 .ca_mode = S_IRUGO | S_IWUSR }, 1961 .show = target_core_show_alua_lu_gp, 1962 .store = target_core_store_alua_lu_gp, 1963 }; 1964 1965 static struct configfs_attribute *lio_core_dev_attrs[] = { 1966 &target_core_attr_dev_info.attr, 1967 &target_core_attr_dev_control.attr, 1968 &target_core_attr_dev_alias.attr, 1969 &target_core_attr_dev_udev_path.attr, 1970 &target_core_attr_dev_enable.attr, 1971 &target_core_attr_dev_alua_lu_gp.attr, 1972 NULL, 1973 }; 1974 1975 static void target_core_dev_release(struct config_item *item) 1976 { 1977 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 1978 struct se_subsystem_dev, se_dev_group); 1979 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 1980 struct se_subsystem_api *t = hba->transport; 1981 struct config_group *dev_cg = &se_dev->se_dev_group; 1982 1983 kfree(dev_cg->default_groups); 1984 /* 1985 * This pointer will set when the storage is enabled with: 1986 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable` 1987 */ 1988 if (se_dev->se_dev_ptr) { 1989 pr_debug("Target_Core_ConfigFS: Calling se_free_" 1990 "virtual_device() for se_dev_ptr: %p\n", 1991 se_dev->se_dev_ptr); 1992 1993 se_free_virtual_device(se_dev->se_dev_ptr, hba); 1994 } else { 1995 /* 1996 * Release struct se_subsystem_dev->se_dev_su_ptr.. 1997 */ 1998 pr_debug("Target_Core_ConfigFS: Calling t->free_" 1999 "device() for se_dev_su_ptr: %p\n", 2000 se_dev->se_dev_su_ptr); 2001 2002 t->free_device(se_dev->se_dev_su_ptr); 2003 } 2004 2005 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem" 2006 "_dev_t: %p\n", se_dev); 2007 kfree(se_dev); 2008 } 2009 2010 static ssize_t target_core_dev_show(struct config_item *item, 2011 struct configfs_attribute *attr, 2012 char *page) 2013 { 2014 struct se_subsystem_dev *se_dev = container_of( 2015 to_config_group(item), struct se_subsystem_dev, 2016 se_dev_group); 2017 struct target_core_configfs_attribute *tc_attr = container_of( 2018 attr, struct target_core_configfs_attribute, attr); 2019 2020 if (!tc_attr->show) 2021 return -EINVAL; 2022 2023 return tc_attr->show(se_dev, page); 2024 } 2025 2026 static ssize_t target_core_dev_store(struct config_item *item, 2027 struct configfs_attribute *attr, 2028 const char *page, size_t count) 2029 { 2030 struct se_subsystem_dev *se_dev = container_of( 2031 to_config_group(item), struct se_subsystem_dev, 2032 se_dev_group); 2033 struct target_core_configfs_attribute *tc_attr = container_of( 2034 attr, struct target_core_configfs_attribute, attr); 2035 2036 if (!tc_attr->store) 2037 return -EINVAL; 2038 2039 return tc_attr->store(se_dev, page, count); 2040 } 2041 2042 static struct configfs_item_operations target_core_dev_item_ops = { 2043 .release = target_core_dev_release, 2044 .show_attribute = target_core_dev_show, 2045 .store_attribute = target_core_dev_store, 2046 }; 2047 2048 static struct config_item_type target_core_dev_cit = { 2049 .ct_item_ops = &target_core_dev_item_ops, 2050 .ct_attrs = lio_core_dev_attrs, 2051 .ct_owner = THIS_MODULE, 2052 }; 2053 2054 /* End functions for struct config_item_type target_core_dev_cit */ 2055 2056 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2057 2058 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2059 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2060 static struct target_core_alua_lu_gp_attribute \ 2061 target_core_alua_lu_gp_##_name = \ 2062 __CONFIGFS_EATTR(_name, _mode, \ 2063 target_core_alua_lu_gp_show_attr_##_name, \ 2064 target_core_alua_lu_gp_store_attr_##_name); 2065 2066 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2067 static struct target_core_alua_lu_gp_attribute \ 2068 target_core_alua_lu_gp_##_name = \ 2069 __CONFIGFS_EATTR_RO(_name, \ 2070 target_core_alua_lu_gp_show_attr_##_name); 2071 2072 /* 2073 * lu_gp_id 2074 */ 2075 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2076 struct t10_alua_lu_gp *lu_gp, 2077 char *page) 2078 { 2079 if (!lu_gp->lu_gp_valid_id) 2080 return 0; 2081 2082 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2083 } 2084 2085 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2086 struct t10_alua_lu_gp *lu_gp, 2087 const char *page, 2088 size_t count) 2089 { 2090 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2091 unsigned long lu_gp_id; 2092 int ret; 2093 2094 ret = strict_strtoul(page, 0, &lu_gp_id); 2095 if (ret < 0) { 2096 pr_err("strict_strtoul() returned %d for" 2097 " lu_gp_id\n", ret); 2098 return -EINVAL; 2099 } 2100 if (lu_gp_id > 0x0000ffff) { 2101 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2102 " 0x0000ffff\n", lu_gp_id); 2103 return -EINVAL; 2104 } 2105 2106 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2107 if (ret < 0) 2108 return -EINVAL; 2109 2110 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2111 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2112 config_item_name(&alua_lu_gp_cg->cg_item), 2113 lu_gp->lu_gp_id); 2114 2115 return count; 2116 } 2117 2118 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2119 2120 /* 2121 * members 2122 */ 2123 static ssize_t target_core_alua_lu_gp_show_attr_members( 2124 struct t10_alua_lu_gp *lu_gp, 2125 char *page) 2126 { 2127 struct se_device *dev; 2128 struct se_hba *hba; 2129 struct se_subsystem_dev *su_dev; 2130 struct t10_alua_lu_gp_member *lu_gp_mem; 2131 ssize_t len = 0, cur_len; 2132 unsigned char buf[LU_GROUP_NAME_BUF]; 2133 2134 memset(buf, 0, LU_GROUP_NAME_BUF); 2135 2136 spin_lock(&lu_gp->lu_gp_lock); 2137 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2138 dev = lu_gp_mem->lu_gp_mem_dev; 2139 su_dev = dev->se_sub_dev; 2140 hba = su_dev->se_dev_hba; 2141 2142 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2143 config_item_name(&hba->hba_group.cg_item), 2144 config_item_name(&su_dev->se_dev_group.cg_item)); 2145 cur_len++; /* Extra byte for NULL terminator */ 2146 2147 if ((cur_len + len) > PAGE_SIZE) { 2148 pr_warn("Ran out of lu_gp_show_attr" 2149 "_members buffer\n"); 2150 break; 2151 } 2152 memcpy(page+len, buf, cur_len); 2153 len += cur_len; 2154 } 2155 spin_unlock(&lu_gp->lu_gp_lock); 2156 2157 return len; 2158 } 2159 2160 SE_DEV_ALUA_LU_ATTR_RO(members); 2161 2162 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2163 2164 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2165 &target_core_alua_lu_gp_lu_gp_id.attr, 2166 &target_core_alua_lu_gp_members.attr, 2167 NULL, 2168 }; 2169 2170 static void target_core_alua_lu_gp_release(struct config_item *item) 2171 { 2172 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2173 struct t10_alua_lu_gp, lu_gp_group); 2174 2175 core_alua_free_lu_gp(lu_gp); 2176 } 2177 2178 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2179 .release = target_core_alua_lu_gp_release, 2180 .show_attribute = target_core_alua_lu_gp_attr_show, 2181 .store_attribute = target_core_alua_lu_gp_attr_store, 2182 }; 2183 2184 static struct config_item_type target_core_alua_lu_gp_cit = { 2185 .ct_item_ops = &target_core_alua_lu_gp_ops, 2186 .ct_attrs = target_core_alua_lu_gp_attrs, 2187 .ct_owner = THIS_MODULE, 2188 }; 2189 2190 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2191 2192 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2193 2194 static struct config_group *target_core_alua_create_lu_gp( 2195 struct config_group *group, 2196 const char *name) 2197 { 2198 struct t10_alua_lu_gp *lu_gp; 2199 struct config_group *alua_lu_gp_cg = NULL; 2200 struct config_item *alua_lu_gp_ci = NULL; 2201 2202 lu_gp = core_alua_allocate_lu_gp(name, 0); 2203 if (IS_ERR(lu_gp)) 2204 return NULL; 2205 2206 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2207 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2208 2209 config_group_init_type_name(alua_lu_gp_cg, name, 2210 &target_core_alua_lu_gp_cit); 2211 2212 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2213 " Group: core/alua/lu_gps/%s\n", 2214 config_item_name(alua_lu_gp_ci)); 2215 2216 return alua_lu_gp_cg; 2217 2218 } 2219 2220 static void target_core_alua_drop_lu_gp( 2221 struct config_group *group, 2222 struct config_item *item) 2223 { 2224 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2225 struct t10_alua_lu_gp, lu_gp_group); 2226 2227 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2228 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2229 config_item_name(item), lu_gp->lu_gp_id); 2230 /* 2231 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2232 * -> target_core_alua_lu_gp_release() 2233 */ 2234 config_item_put(item); 2235 } 2236 2237 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2238 .make_group = &target_core_alua_create_lu_gp, 2239 .drop_item = &target_core_alua_drop_lu_gp, 2240 }; 2241 2242 static struct config_item_type target_core_alua_lu_gps_cit = { 2243 .ct_item_ops = NULL, 2244 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2245 .ct_owner = THIS_MODULE, 2246 }; 2247 2248 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2249 2250 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2251 2252 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2253 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2254 static struct target_core_alua_tg_pt_gp_attribute \ 2255 target_core_alua_tg_pt_gp_##_name = \ 2256 __CONFIGFS_EATTR(_name, _mode, \ 2257 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2258 target_core_alua_tg_pt_gp_store_attr_##_name); 2259 2260 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2261 static struct target_core_alua_tg_pt_gp_attribute \ 2262 target_core_alua_tg_pt_gp_##_name = \ 2263 __CONFIGFS_EATTR_RO(_name, \ 2264 target_core_alua_tg_pt_gp_show_attr_##_name); 2265 2266 /* 2267 * alua_access_state 2268 */ 2269 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2270 struct t10_alua_tg_pt_gp *tg_pt_gp, 2271 char *page) 2272 { 2273 return sprintf(page, "%d\n", 2274 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2275 } 2276 2277 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2278 struct t10_alua_tg_pt_gp *tg_pt_gp, 2279 const char *page, 2280 size_t count) 2281 { 2282 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev; 2283 unsigned long tmp; 2284 int new_state, ret; 2285 2286 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2287 pr_err("Unable to do implict ALUA on non valid" 2288 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2289 return -EINVAL; 2290 } 2291 2292 ret = strict_strtoul(page, 0, &tmp); 2293 if (ret < 0) { 2294 pr_err("Unable to extract new ALUA access state from" 2295 " %s\n", page); 2296 return -EINVAL; 2297 } 2298 new_state = (int)tmp; 2299 2300 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { 2301 pr_err("Unable to process implict configfs ALUA" 2302 " transition while TPGS_IMPLICT_ALUA is diabled\n"); 2303 return -EINVAL; 2304 } 2305 2306 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr, 2307 NULL, NULL, new_state, 0); 2308 return (!ret) ? count : -EINVAL; 2309 } 2310 2311 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2312 2313 /* 2314 * alua_access_status 2315 */ 2316 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2317 struct t10_alua_tg_pt_gp *tg_pt_gp, 2318 char *page) 2319 { 2320 return sprintf(page, "%s\n", 2321 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2322 } 2323 2324 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2325 struct t10_alua_tg_pt_gp *tg_pt_gp, 2326 const char *page, 2327 size_t count) 2328 { 2329 unsigned long tmp; 2330 int new_status, ret; 2331 2332 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2333 pr_err("Unable to do set ALUA access status on non" 2334 " valid tg_pt_gp ID: %hu\n", 2335 tg_pt_gp->tg_pt_gp_valid_id); 2336 return -EINVAL; 2337 } 2338 2339 ret = strict_strtoul(page, 0, &tmp); 2340 if (ret < 0) { 2341 pr_err("Unable to extract new ALUA access status" 2342 " from %s\n", page); 2343 return -EINVAL; 2344 } 2345 new_status = (int)tmp; 2346 2347 if ((new_status != ALUA_STATUS_NONE) && 2348 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && 2349 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 2350 pr_err("Illegal ALUA access status: 0x%02x\n", 2351 new_status); 2352 return -EINVAL; 2353 } 2354 2355 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2356 return count; 2357 } 2358 2359 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2360 2361 /* 2362 * alua_access_type 2363 */ 2364 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2365 struct t10_alua_tg_pt_gp *tg_pt_gp, 2366 char *page) 2367 { 2368 return core_alua_show_access_type(tg_pt_gp, page); 2369 } 2370 2371 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2372 struct t10_alua_tg_pt_gp *tg_pt_gp, 2373 const char *page, 2374 size_t count) 2375 { 2376 return core_alua_store_access_type(tg_pt_gp, page, count); 2377 } 2378 2379 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2380 2381 /* 2382 * alua_write_metadata 2383 */ 2384 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2385 struct t10_alua_tg_pt_gp *tg_pt_gp, 2386 char *page) 2387 { 2388 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2389 } 2390 2391 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2392 struct t10_alua_tg_pt_gp *tg_pt_gp, 2393 const char *page, 2394 size_t count) 2395 { 2396 unsigned long tmp; 2397 int ret; 2398 2399 ret = strict_strtoul(page, 0, &tmp); 2400 if (ret < 0) { 2401 pr_err("Unable to extract alua_write_metadata\n"); 2402 return -EINVAL; 2403 } 2404 2405 if ((tmp != 0) && (tmp != 1)) { 2406 pr_err("Illegal value for alua_write_metadata:" 2407 " %lu\n", tmp); 2408 return -EINVAL; 2409 } 2410 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2411 2412 return count; 2413 } 2414 2415 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2416 2417 2418 2419 /* 2420 * nonop_delay_msecs 2421 */ 2422 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2423 struct t10_alua_tg_pt_gp *tg_pt_gp, 2424 char *page) 2425 { 2426 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2427 2428 } 2429 2430 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2431 struct t10_alua_tg_pt_gp *tg_pt_gp, 2432 const char *page, 2433 size_t count) 2434 { 2435 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2436 } 2437 2438 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2439 2440 /* 2441 * trans_delay_msecs 2442 */ 2443 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2444 struct t10_alua_tg_pt_gp *tg_pt_gp, 2445 char *page) 2446 { 2447 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2448 } 2449 2450 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2451 struct t10_alua_tg_pt_gp *tg_pt_gp, 2452 const char *page, 2453 size_t count) 2454 { 2455 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2456 } 2457 2458 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2459 2460 /* 2461 * preferred 2462 */ 2463 2464 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2465 struct t10_alua_tg_pt_gp *tg_pt_gp, 2466 char *page) 2467 { 2468 return core_alua_show_preferred_bit(tg_pt_gp, page); 2469 } 2470 2471 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2472 struct t10_alua_tg_pt_gp *tg_pt_gp, 2473 const char *page, 2474 size_t count) 2475 { 2476 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2477 } 2478 2479 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2480 2481 /* 2482 * tg_pt_gp_id 2483 */ 2484 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2485 struct t10_alua_tg_pt_gp *tg_pt_gp, 2486 char *page) 2487 { 2488 if (!tg_pt_gp->tg_pt_gp_valid_id) 2489 return 0; 2490 2491 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2492 } 2493 2494 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2495 struct t10_alua_tg_pt_gp *tg_pt_gp, 2496 const char *page, 2497 size_t count) 2498 { 2499 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2500 unsigned long tg_pt_gp_id; 2501 int ret; 2502 2503 ret = strict_strtoul(page, 0, &tg_pt_gp_id); 2504 if (ret < 0) { 2505 pr_err("strict_strtoul() returned %d for" 2506 " tg_pt_gp_id\n", ret); 2507 return -EINVAL; 2508 } 2509 if (tg_pt_gp_id > 0x0000ffff) { 2510 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2511 " 0x0000ffff\n", tg_pt_gp_id); 2512 return -EINVAL; 2513 } 2514 2515 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2516 if (ret < 0) 2517 return -EINVAL; 2518 2519 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2520 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2521 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2522 tg_pt_gp->tg_pt_gp_id); 2523 2524 return count; 2525 } 2526 2527 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2528 2529 /* 2530 * members 2531 */ 2532 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2533 struct t10_alua_tg_pt_gp *tg_pt_gp, 2534 char *page) 2535 { 2536 struct se_port *port; 2537 struct se_portal_group *tpg; 2538 struct se_lun *lun; 2539 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2540 ssize_t len = 0, cur_len; 2541 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2542 2543 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2544 2545 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2546 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2547 tg_pt_gp_mem_list) { 2548 port = tg_pt_gp_mem->tg_pt; 2549 tpg = port->sep_tpg; 2550 lun = port->sep_lun; 2551 2552 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2553 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2554 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2555 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2556 config_item_name(&lun->lun_group.cg_item)); 2557 cur_len++; /* Extra byte for NULL terminator */ 2558 2559 if ((cur_len + len) > PAGE_SIZE) { 2560 pr_warn("Ran out of lu_gp_show_attr" 2561 "_members buffer\n"); 2562 break; 2563 } 2564 memcpy(page+len, buf, cur_len); 2565 len += cur_len; 2566 } 2567 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2568 2569 return len; 2570 } 2571 2572 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2573 2574 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2575 tg_pt_gp_group); 2576 2577 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2578 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2579 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2580 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2581 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2582 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2583 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2584 &target_core_alua_tg_pt_gp_preferred.attr, 2585 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2586 &target_core_alua_tg_pt_gp_members.attr, 2587 NULL, 2588 }; 2589 2590 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2591 { 2592 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2593 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2594 2595 core_alua_free_tg_pt_gp(tg_pt_gp); 2596 } 2597 2598 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2599 .release = target_core_alua_tg_pt_gp_release, 2600 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2601 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2602 }; 2603 2604 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2605 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2606 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2607 .ct_owner = THIS_MODULE, 2608 }; 2609 2610 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2611 2612 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2613 2614 static struct config_group *target_core_alua_create_tg_pt_gp( 2615 struct config_group *group, 2616 const char *name) 2617 { 2618 struct t10_alua *alua = container_of(group, struct t10_alua, 2619 alua_tg_pt_gps_group); 2620 struct t10_alua_tg_pt_gp *tg_pt_gp; 2621 struct se_subsystem_dev *su_dev = alua->t10_sub_dev; 2622 struct config_group *alua_tg_pt_gp_cg = NULL; 2623 struct config_item *alua_tg_pt_gp_ci = NULL; 2624 2625 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0); 2626 if (!tg_pt_gp) 2627 return NULL; 2628 2629 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2630 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2631 2632 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2633 &target_core_alua_tg_pt_gp_cit); 2634 2635 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2636 " Group: alua/tg_pt_gps/%s\n", 2637 config_item_name(alua_tg_pt_gp_ci)); 2638 2639 return alua_tg_pt_gp_cg; 2640 } 2641 2642 static void target_core_alua_drop_tg_pt_gp( 2643 struct config_group *group, 2644 struct config_item *item) 2645 { 2646 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2647 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2648 2649 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2650 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2651 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2652 /* 2653 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2654 * -> target_core_alua_tg_pt_gp_release(). 2655 */ 2656 config_item_put(item); 2657 } 2658 2659 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2660 .make_group = &target_core_alua_create_tg_pt_gp, 2661 .drop_item = &target_core_alua_drop_tg_pt_gp, 2662 }; 2663 2664 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2665 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2666 .ct_owner = THIS_MODULE, 2667 }; 2668 2669 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2670 2671 /* Start functions for struct config_item_type target_core_alua_cit */ 2672 2673 /* 2674 * target_core_alua_cit is a ConfigFS group that lives under 2675 * /sys/kernel/config/target/core/alua. There are default groups 2676 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2677 * target_core_alua_cit in target_core_init_configfs() below. 2678 */ 2679 static struct config_item_type target_core_alua_cit = { 2680 .ct_item_ops = NULL, 2681 .ct_attrs = NULL, 2682 .ct_owner = THIS_MODULE, 2683 }; 2684 2685 /* End functions for struct config_item_type target_core_alua_cit */ 2686 2687 /* Start functions for struct config_item_type target_core_stat_cit */ 2688 2689 static struct config_group *target_core_stat_mkdir( 2690 struct config_group *group, 2691 const char *name) 2692 { 2693 return ERR_PTR(-ENOSYS); 2694 } 2695 2696 static void target_core_stat_rmdir( 2697 struct config_group *group, 2698 struct config_item *item) 2699 { 2700 return; 2701 } 2702 2703 static struct configfs_group_operations target_core_stat_group_ops = { 2704 .make_group = &target_core_stat_mkdir, 2705 .drop_item = &target_core_stat_rmdir, 2706 }; 2707 2708 static struct config_item_type target_core_stat_cit = { 2709 .ct_group_ops = &target_core_stat_group_ops, 2710 .ct_owner = THIS_MODULE, 2711 }; 2712 2713 /* End functions for struct config_item_type target_core_stat_cit */ 2714 2715 /* Start functions for struct config_item_type target_core_hba_cit */ 2716 2717 static struct config_group *target_core_make_subdev( 2718 struct config_group *group, 2719 const char *name) 2720 { 2721 struct t10_alua_tg_pt_gp *tg_pt_gp; 2722 struct se_subsystem_dev *se_dev; 2723 struct se_subsystem_api *t; 2724 struct config_item *hba_ci = &group->cg_item; 2725 struct se_hba *hba = item_to_hba(hba_ci); 2726 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2727 struct config_group *dev_stat_grp = NULL; 2728 int errno = -ENOMEM, ret; 2729 2730 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2731 if (ret) 2732 return ERR_PTR(ret); 2733 /* 2734 * Locate the struct se_subsystem_api from parent's struct se_hba. 2735 */ 2736 t = hba->transport; 2737 2738 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 2739 if (!se_dev) { 2740 pr_err("Unable to allocate memory for" 2741 " struct se_subsystem_dev\n"); 2742 goto unlock; 2743 } 2744 INIT_LIST_HEAD(&se_dev->se_dev_node); 2745 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 2746 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 2747 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 2748 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 2749 spin_lock_init(&se_dev->t10_pr.registration_lock); 2750 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 2751 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 2752 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 2753 spin_lock_init(&se_dev->se_dev_lock); 2754 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 2755 se_dev->t10_wwn.t10_sub_dev = se_dev; 2756 se_dev->t10_alua.t10_sub_dev = se_dev; 2757 se_dev->se_dev_attrib.da_sub_dev = se_dev; 2758 2759 se_dev->se_dev_hba = hba; 2760 dev_cg = &se_dev->se_dev_group; 2761 2762 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7, 2763 GFP_KERNEL); 2764 if (!dev_cg->default_groups) 2765 goto out; 2766 /* 2767 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr 2768 * for ->allocate_virtdevice() 2769 * 2770 * se_dev->se_dev_ptr will be set after ->create_virtdev() 2771 * has been called successfully in the next level up in the 2772 * configfs tree for device object's struct config_group. 2773 */ 2774 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name); 2775 if (!se_dev->se_dev_su_ptr) { 2776 pr_err("Unable to locate subsystem dependent pointer" 2777 " from allocate_virtdevice()\n"); 2778 goto out; 2779 } 2780 spin_lock(&se_device_lock); 2781 list_add_tail(&se_dev->se_dev_node, &se_dev_list); 2782 spin_unlock(&se_device_lock); 2783 2784 config_group_init_type_name(&se_dev->se_dev_group, name, 2785 &target_core_dev_cit); 2786 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib", 2787 &target_core_dev_attrib_cit); 2788 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr", 2789 &target_core_dev_pr_cit); 2790 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn", 2791 &target_core_dev_wwn_cit); 2792 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group, 2793 "alua", &target_core_alua_tg_pt_gps_cit); 2794 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group, 2795 "statistics", &target_core_stat_cit); 2796 2797 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group; 2798 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group; 2799 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group; 2800 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group; 2801 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group; 2802 dev_cg->default_groups[5] = NULL; 2803 /* 2804 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2805 */ 2806 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1); 2807 if (!tg_pt_gp) 2808 goto out; 2809 2810 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; 2811 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 2812 GFP_KERNEL); 2813 if (!tg_pt_gp_cg->default_groups) { 2814 pr_err("Unable to allocate tg_pt_gp_cg->" 2815 "default_groups\n"); 2816 goto out; 2817 } 2818 2819 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2820 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2821 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2822 tg_pt_gp_cg->default_groups[1] = NULL; 2823 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2824 /* 2825 * Add core/$HBA/$DEV/statistics/ default groups 2826 */ 2827 dev_stat_grp = &se_dev->dev_stat_grps.stat_group; 2828 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4, 2829 GFP_KERNEL); 2830 if (!dev_stat_grp->default_groups) { 2831 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2832 goto out; 2833 } 2834 target_stat_setup_dev_default_groups(se_dev); 2835 2836 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:" 2837 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr); 2838 2839 mutex_unlock(&hba->hba_access_mutex); 2840 return &se_dev->se_dev_group; 2841 out: 2842 if (se_dev->t10_alua.default_tg_pt_gp) { 2843 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp); 2844 se_dev->t10_alua.default_tg_pt_gp = NULL; 2845 } 2846 if (dev_stat_grp) 2847 kfree(dev_stat_grp->default_groups); 2848 if (tg_pt_gp_cg) 2849 kfree(tg_pt_gp_cg->default_groups); 2850 if (dev_cg) 2851 kfree(dev_cg->default_groups); 2852 if (se_dev->se_dev_su_ptr) 2853 t->free_device(se_dev->se_dev_su_ptr); 2854 kfree(se_dev); 2855 unlock: 2856 mutex_unlock(&hba->hba_access_mutex); 2857 return ERR_PTR(errno); 2858 } 2859 2860 static void target_core_drop_subdev( 2861 struct config_group *group, 2862 struct config_item *item) 2863 { 2864 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 2865 struct se_subsystem_dev, se_dev_group); 2866 struct se_hba *hba; 2867 struct se_subsystem_api *t; 2868 struct config_item *df_item; 2869 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp; 2870 int i; 2871 2872 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 2873 2874 mutex_lock(&hba->hba_access_mutex); 2875 t = hba->transport; 2876 2877 spin_lock(&se_device_lock); 2878 list_del(&se_dev->se_dev_node); 2879 spin_unlock(&se_device_lock); 2880 2881 dev_stat_grp = &se_dev->dev_stat_grps.stat_group; 2882 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2883 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2884 dev_stat_grp->default_groups[i] = NULL; 2885 config_item_put(df_item); 2886 } 2887 kfree(dev_stat_grp->default_groups); 2888 2889 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; 2890 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2891 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2892 tg_pt_gp_cg->default_groups[i] = NULL; 2893 config_item_put(df_item); 2894 } 2895 kfree(tg_pt_gp_cg->default_groups); 2896 /* 2897 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2898 * directly from target_core_alua_tg_pt_gp_release(). 2899 */ 2900 se_dev->t10_alua.default_tg_pt_gp = NULL; 2901 2902 dev_cg = &se_dev->se_dev_group; 2903 for (i = 0; dev_cg->default_groups[i]; i++) { 2904 df_item = &dev_cg->default_groups[i]->cg_item; 2905 dev_cg->default_groups[i] = NULL; 2906 config_item_put(df_item); 2907 } 2908 /* 2909 * The releasing of se_dev and associated se_dev->se_dev_ptr is done 2910 * from target_core_dev_item_ops->release() ->target_core_dev_release(). 2911 */ 2912 config_item_put(item); 2913 mutex_unlock(&hba->hba_access_mutex); 2914 } 2915 2916 static struct configfs_group_operations target_core_hba_group_ops = { 2917 .make_group = target_core_make_subdev, 2918 .drop_item = target_core_drop_subdev, 2919 }; 2920 2921 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2922 #define SE_HBA_ATTR(_name, _mode) \ 2923 static struct target_core_hba_attribute \ 2924 target_core_hba_##_name = \ 2925 __CONFIGFS_EATTR(_name, _mode, \ 2926 target_core_hba_show_attr_##_name, \ 2927 target_core_hba_store_attr_##_name); 2928 2929 #define SE_HBA_ATTR_RO(_name) \ 2930 static struct target_core_hba_attribute \ 2931 target_core_hba_##_name = \ 2932 __CONFIGFS_EATTR_RO(_name, \ 2933 target_core_hba_show_attr_##_name); 2934 2935 static ssize_t target_core_hba_show_attr_hba_info( 2936 struct se_hba *hba, 2937 char *page) 2938 { 2939 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2940 hba->hba_id, hba->transport->name, 2941 TARGET_CORE_CONFIGFS_VERSION); 2942 } 2943 2944 SE_HBA_ATTR_RO(hba_info); 2945 2946 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2947 char *page) 2948 { 2949 int hba_mode = 0; 2950 2951 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2952 hba_mode = 1; 2953 2954 return sprintf(page, "%d\n", hba_mode); 2955 } 2956 2957 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2958 const char *page, size_t count) 2959 { 2960 struct se_subsystem_api *transport = hba->transport; 2961 unsigned long mode_flag; 2962 int ret; 2963 2964 if (transport->pmode_enable_hba == NULL) 2965 return -EINVAL; 2966 2967 ret = strict_strtoul(page, 0, &mode_flag); 2968 if (ret < 0) { 2969 pr_err("Unable to extract hba mode flag: %d\n", ret); 2970 return -EINVAL; 2971 } 2972 2973 spin_lock(&hba->device_lock); 2974 if (!list_empty(&hba->hba_dev_list)) { 2975 pr_err("Unable to set hba_mode with active devices\n"); 2976 spin_unlock(&hba->device_lock); 2977 return -EINVAL; 2978 } 2979 spin_unlock(&hba->device_lock); 2980 2981 ret = transport->pmode_enable_hba(hba, mode_flag); 2982 if (ret < 0) 2983 return -EINVAL; 2984 if (ret > 0) 2985 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2986 else if (ret == 0) 2987 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2988 2989 return count; 2990 } 2991 2992 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2993 2994 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2995 2996 static void target_core_hba_release(struct config_item *item) 2997 { 2998 struct se_hba *hba = container_of(to_config_group(item), 2999 struct se_hba, hba_group); 3000 core_delete_hba(hba); 3001 } 3002 3003 static struct configfs_attribute *target_core_hba_attrs[] = { 3004 &target_core_hba_hba_info.attr, 3005 &target_core_hba_hba_mode.attr, 3006 NULL, 3007 }; 3008 3009 static struct configfs_item_operations target_core_hba_item_ops = { 3010 .release = target_core_hba_release, 3011 .show_attribute = target_core_hba_attr_show, 3012 .store_attribute = target_core_hba_attr_store, 3013 }; 3014 3015 static struct config_item_type target_core_hba_cit = { 3016 .ct_item_ops = &target_core_hba_item_ops, 3017 .ct_group_ops = &target_core_hba_group_ops, 3018 .ct_attrs = target_core_hba_attrs, 3019 .ct_owner = THIS_MODULE, 3020 }; 3021 3022 static struct config_group *target_core_call_addhbatotarget( 3023 struct config_group *group, 3024 const char *name) 3025 { 3026 char *se_plugin_str, *str, *str2; 3027 struct se_hba *hba; 3028 char buf[TARGET_CORE_NAME_MAX_LEN]; 3029 unsigned long plugin_dep_id = 0; 3030 int ret; 3031 3032 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3033 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3034 pr_err("Passed *name strlen(): %d exceeds" 3035 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3036 TARGET_CORE_NAME_MAX_LEN); 3037 return ERR_PTR(-ENAMETOOLONG); 3038 } 3039 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3040 3041 str = strstr(buf, "_"); 3042 if (!str) { 3043 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3044 return ERR_PTR(-EINVAL); 3045 } 3046 se_plugin_str = buf; 3047 /* 3048 * Special case for subsystem plugins that have "_" in their names. 3049 * Namely rd_direct and rd_mcp.. 3050 */ 3051 str2 = strstr(str+1, "_"); 3052 if (str2) { 3053 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3054 str2++; /* Skip to start of plugin dependent ID */ 3055 str = str2; 3056 } else { 3057 *str = '\0'; /* Terminate for *se_plugin_str */ 3058 str++; /* Skip to start of plugin dependent ID */ 3059 } 3060 3061 ret = strict_strtoul(str, 0, &plugin_dep_id); 3062 if (ret < 0) { 3063 pr_err("strict_strtoul() returned %d for" 3064 " plugin_dep_id\n", ret); 3065 return ERR_PTR(-EINVAL); 3066 } 3067 /* 3068 * Load up TCM subsystem plugins if they have not already been loaded. 3069 */ 3070 transport_subsystem_check_init(); 3071 3072 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3073 if (IS_ERR(hba)) 3074 return ERR_CAST(hba); 3075 3076 config_group_init_type_name(&hba->hba_group, name, 3077 &target_core_hba_cit); 3078 3079 return &hba->hba_group; 3080 } 3081 3082 static void target_core_call_delhbafromtarget( 3083 struct config_group *group, 3084 struct config_item *item) 3085 { 3086 /* 3087 * core_delete_hba() is called from target_core_hba_item_ops->release() 3088 * -> target_core_hba_release() 3089 */ 3090 config_item_put(item); 3091 } 3092 3093 static struct configfs_group_operations target_core_group_ops = { 3094 .make_group = target_core_call_addhbatotarget, 3095 .drop_item = target_core_call_delhbafromtarget, 3096 }; 3097 3098 static struct config_item_type target_core_cit = { 3099 .ct_item_ops = NULL, 3100 .ct_group_ops = &target_core_group_ops, 3101 .ct_attrs = NULL, 3102 .ct_owner = THIS_MODULE, 3103 }; 3104 3105 /* Stop functions for struct config_item_type target_core_hba_cit */ 3106 3107 static int __init target_core_init_configfs(void) 3108 { 3109 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3110 struct config_group *lu_gp_cg = NULL; 3111 struct configfs_subsystem *subsys; 3112 struct t10_alua_lu_gp *lu_gp; 3113 int ret; 3114 3115 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3116 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3117 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3118 3119 subsys = target_core_subsystem[0]; 3120 config_group_init(&subsys->su_group); 3121 mutex_init(&subsys->su_mutex); 3122 3123 INIT_LIST_HEAD(&g_tf_list); 3124 mutex_init(&g_tf_lock); 3125 ret = init_se_kmem_caches(); 3126 if (ret < 0) 3127 return ret; 3128 /* 3129 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3130 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3131 */ 3132 target_cg = &subsys->su_group; 3133 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3134 GFP_KERNEL); 3135 if (!target_cg->default_groups) { 3136 pr_err("Unable to allocate target_cg->default_groups\n"); 3137 goto out_global; 3138 } 3139 3140 config_group_init_type_name(&target_core_hbagroup, 3141 "core", &target_core_cit); 3142 target_cg->default_groups[0] = &target_core_hbagroup; 3143 target_cg->default_groups[1] = NULL; 3144 /* 3145 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3146 */ 3147 hba_cg = &target_core_hbagroup; 3148 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3149 GFP_KERNEL); 3150 if (!hba_cg->default_groups) { 3151 pr_err("Unable to allocate hba_cg->default_groups\n"); 3152 goto out_global; 3153 } 3154 config_group_init_type_name(&alua_group, 3155 "alua", &target_core_alua_cit); 3156 hba_cg->default_groups[0] = &alua_group; 3157 hba_cg->default_groups[1] = NULL; 3158 /* 3159 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3160 * groups under /sys/kernel/config/target/core/alua/ 3161 */ 3162 alua_cg = &alua_group; 3163 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3164 GFP_KERNEL); 3165 if (!alua_cg->default_groups) { 3166 pr_err("Unable to allocate alua_cg->default_groups\n"); 3167 goto out_global; 3168 } 3169 3170 config_group_init_type_name(&alua_lu_gps_group, 3171 "lu_gps", &target_core_alua_lu_gps_cit); 3172 alua_cg->default_groups[0] = &alua_lu_gps_group; 3173 alua_cg->default_groups[1] = NULL; 3174 /* 3175 * Add core/alua/lu_gps/default_lu_gp 3176 */ 3177 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3178 if (IS_ERR(lu_gp)) 3179 goto out_global; 3180 3181 lu_gp_cg = &alua_lu_gps_group; 3182 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3183 GFP_KERNEL); 3184 if (!lu_gp_cg->default_groups) { 3185 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3186 goto out_global; 3187 } 3188 3189 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3190 &target_core_alua_lu_gp_cit); 3191 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3192 lu_gp_cg->default_groups[1] = NULL; 3193 default_lu_gp = lu_gp; 3194 /* 3195 * Register the target_core_mod subsystem with configfs. 3196 */ 3197 ret = configfs_register_subsystem(subsys); 3198 if (ret < 0) { 3199 pr_err("Error %d while registering subsystem %s\n", 3200 ret, subsys->su_group.cg_item.ci_namebuf); 3201 goto out_global; 3202 } 3203 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3204 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3205 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3206 /* 3207 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3208 */ 3209 ret = rd_module_init(); 3210 if (ret < 0) 3211 goto out; 3212 3213 if (core_dev_setup_virtual_lun0() < 0) 3214 goto out; 3215 3216 return 0; 3217 3218 out: 3219 configfs_unregister_subsystem(subsys); 3220 core_dev_release_virtual_lun0(); 3221 rd_module_exit(); 3222 out_global: 3223 if (default_lu_gp) { 3224 core_alua_free_lu_gp(default_lu_gp); 3225 default_lu_gp = NULL; 3226 } 3227 if (lu_gp_cg) 3228 kfree(lu_gp_cg->default_groups); 3229 if (alua_cg) 3230 kfree(alua_cg->default_groups); 3231 if (hba_cg) 3232 kfree(hba_cg->default_groups); 3233 kfree(target_cg->default_groups); 3234 release_se_kmem_caches(); 3235 return ret; 3236 } 3237 3238 static void __exit target_core_exit_configfs(void) 3239 { 3240 struct configfs_subsystem *subsys; 3241 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3242 struct config_item *item; 3243 int i; 3244 3245 subsys = target_core_subsystem[0]; 3246 3247 lu_gp_cg = &alua_lu_gps_group; 3248 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3249 item = &lu_gp_cg->default_groups[i]->cg_item; 3250 lu_gp_cg->default_groups[i] = NULL; 3251 config_item_put(item); 3252 } 3253 kfree(lu_gp_cg->default_groups); 3254 lu_gp_cg->default_groups = NULL; 3255 3256 alua_cg = &alua_group; 3257 for (i = 0; alua_cg->default_groups[i]; i++) { 3258 item = &alua_cg->default_groups[i]->cg_item; 3259 alua_cg->default_groups[i] = NULL; 3260 config_item_put(item); 3261 } 3262 kfree(alua_cg->default_groups); 3263 alua_cg->default_groups = NULL; 3264 3265 hba_cg = &target_core_hbagroup; 3266 for (i = 0; hba_cg->default_groups[i]; i++) { 3267 item = &hba_cg->default_groups[i]->cg_item; 3268 hba_cg->default_groups[i] = NULL; 3269 config_item_put(item); 3270 } 3271 kfree(hba_cg->default_groups); 3272 hba_cg->default_groups = NULL; 3273 /* 3274 * We expect subsys->su_group.default_groups to be released 3275 * by configfs subsystem provider logic.. 3276 */ 3277 configfs_unregister_subsystem(subsys); 3278 kfree(subsys->su_group.default_groups); 3279 3280 core_alua_free_lu_gp(default_lu_gp); 3281 default_lu_gp = NULL; 3282 3283 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3284 " Infrastructure\n"); 3285 3286 core_dev_release_virtual_lun0(); 3287 rd_module_exit(); 3288 release_se_kmem_caches(); 3289 } 3290 3291 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3292 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3293 MODULE_LICENSE("GPL"); 3294 3295 module_init(target_core_init_configfs); 3296 module_exit(target_core_exit_configfs); 3297