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