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