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