1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2013 Datera, Inc. 7 * 8 * Nicholas A. Bellinger <nab@kernel.org> 9 * 10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 ****************************************************************************/ 22 23 #include <linux/module.h> 24 #include <linux/moduleparam.h> 25 #include <generated/utsrelease.h> 26 #include <linux/utsname.h> 27 #include <linux/init.h> 28 #include <linux/fs.h> 29 #include <linux/namei.h> 30 #include <linux/slab.h> 31 #include <linux/types.h> 32 #include <linux/delay.h> 33 #include <linux/unistd.h> 34 #include <linux/string.h> 35 #include <linux/parser.h> 36 #include <linux/syscalls.h> 37 #include <linux/configfs.h> 38 #include <linux/spinlock.h> 39 40 #include <target/target_core_base.h> 41 #include <target/target_core_backend.h> 42 #include <target/target_core_fabric.h> 43 #include <target/target_core_fabric_configfs.h> 44 #include <target/target_core_configfs.h> 45 #include <target/configfs_macros.h> 46 47 #include "target_core_internal.h" 48 #include "target_core_alua.h" 49 #include "target_core_pr.h" 50 #include "target_core_rd.h" 51 #include "target_core_xcopy.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 tf = target_core_get_fabric(name); 131 if (!tf) { 132 pr_err("target_core_register_fabric() trying autoload for %s\n", 133 name); 134 135 /* 136 * Below are some hardcoded request_module() calls to automatically 137 * local fabric modules when the following is called: 138 * 139 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 140 * 141 * Note that this does not limit which TCM fabric module can be 142 * registered, but simply provids auto loading logic for modules with 143 * mkdir(2) system calls with known TCM fabric modules. 144 */ 145 146 if (!strncmp(name, "iscsi", 5)) { 147 /* 148 * Automatically load the LIO Target fabric module when the 149 * following is called: 150 * 151 * mkdir -p $CONFIGFS/target/iscsi 152 */ 153 ret = request_module("iscsi_target_mod"); 154 if (ret < 0) { 155 pr_err("request_module() failed for" 156 " iscsi_target_mod.ko: %d\n", ret); 157 return ERR_PTR(-EINVAL); 158 } 159 } else if (!strncmp(name, "loopback", 8)) { 160 /* 161 * Automatically load the tcm_loop fabric module when the 162 * following is called: 163 * 164 * mkdir -p $CONFIGFS/target/loopback 165 */ 166 ret = request_module("tcm_loop"); 167 if (ret < 0) { 168 pr_err("request_module() failed for" 169 " tcm_loop.ko: %d\n", ret); 170 return ERR_PTR(-EINVAL); 171 } 172 } 173 174 tf = target_core_get_fabric(name); 175 } 176 177 if (!tf) { 178 pr_err("target_core_get_fabric() failed for %s\n", 179 name); 180 return ERR_PTR(-EINVAL); 181 } 182 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 183 " %s\n", tf->tf_name); 184 /* 185 * On a successful target_core_get_fabric() look, the returned 186 * struct target_fabric_configfs *tf will contain a usage reference. 187 */ 188 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 189 &tf->tf_cit_tmpl.tfc_wwn_cit); 190 191 tf->tf_group.default_groups = tf->tf_default_groups; 192 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 193 tf->tf_group.default_groups[1] = NULL; 194 195 config_group_init_type_name(&tf->tf_group, name, 196 &tf->tf_cit_tmpl.tfc_wwn_cit); 197 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 198 &tf->tf_cit_tmpl.tfc_discovery_cit); 199 200 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 201 " %s\n", tf->tf_group.cg_item.ci_name); 202 /* 203 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 204 */ 205 tf->tf_ops.tf_subsys = tf->tf_subsys; 206 tf->tf_fabric = &tf->tf_group.cg_item; 207 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 208 " for %s\n", name); 209 210 return &tf->tf_group; 211 } 212 213 /* 214 * Called from struct target_core_group_ops->drop_item() 215 */ 216 static void target_core_deregister_fabric( 217 struct config_group *group, 218 struct config_item *item) 219 { 220 struct target_fabric_configfs *tf = container_of( 221 to_config_group(item), struct target_fabric_configfs, tf_group); 222 struct config_group *tf_group; 223 struct config_item *df_item; 224 int i; 225 226 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 227 " tf list\n", config_item_name(item)); 228 229 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 230 " %s\n", tf->tf_name); 231 atomic_dec(&tf->tf_access_cnt); 232 233 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 234 " tf->tf_fabric for %s\n", tf->tf_name); 235 tf->tf_fabric = NULL; 236 237 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 238 " %s\n", config_item_name(item)); 239 240 tf_group = &tf->tf_group; 241 for (i = 0; tf_group->default_groups[i]; i++) { 242 df_item = &tf_group->default_groups[i]->cg_item; 243 tf_group->default_groups[i] = NULL; 244 config_item_put(df_item); 245 } 246 config_item_put(item); 247 } 248 249 static struct configfs_group_operations target_core_fabric_group_ops = { 250 .make_group = &target_core_register_fabric, 251 .drop_item = &target_core_deregister_fabric, 252 }; 253 254 /* 255 * All item attributes appearing in /sys/kernel/target/ appear here. 256 */ 257 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 258 &target_core_item_attr_version, 259 NULL, 260 }; 261 262 /* 263 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 264 */ 265 static struct config_item_type target_core_fabrics_item = { 266 .ct_item_ops = &target_core_fabric_item_ops, 267 .ct_group_ops = &target_core_fabric_group_ops, 268 .ct_attrs = target_core_fabric_item_attrs, 269 .ct_owner = THIS_MODULE, 270 }; 271 272 static struct configfs_subsystem target_core_fabrics = { 273 .su_group = { 274 .cg_item = { 275 .ci_namebuf = "target", 276 .ci_type = &target_core_fabrics_item, 277 }, 278 }, 279 }; 280 281 struct configfs_subsystem *target_core_subsystem[] = { 282 &target_core_fabrics, 283 NULL, 284 }; 285 286 /*############################################################################## 287 // Start functions called by external Target Fabrics Modules 288 //############################################################################*/ 289 290 /* 291 * First function called by fabric modules to: 292 * 293 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 294 * 2) Add struct target_fabric_configfs to g_tf_list 295 * 3) Return struct target_fabric_configfs to fabric module to be passed 296 * into target_fabric_configfs_register(). 297 */ 298 struct target_fabric_configfs *target_fabric_configfs_init( 299 struct module *fabric_mod, 300 const char *name) 301 { 302 struct target_fabric_configfs *tf; 303 304 if (!(name)) { 305 pr_err("Unable to locate passed fabric name\n"); 306 return ERR_PTR(-EINVAL); 307 } 308 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 309 pr_err("Passed name: %s exceeds TARGET_FABRIC" 310 "_NAME_SIZE\n", name); 311 return ERR_PTR(-EINVAL); 312 } 313 314 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 315 if (!tf) 316 return ERR_PTR(-ENOMEM); 317 318 INIT_LIST_HEAD(&tf->tf_list); 319 atomic_set(&tf->tf_access_cnt, 0); 320 /* 321 * Setup the default generic struct config_item_type's (cits) in 322 * struct target_fabric_configfs->tf_cit_tmpl 323 */ 324 tf->tf_module = fabric_mod; 325 target_fabric_setup_cits(tf); 326 327 tf->tf_subsys = target_core_subsystem[0]; 328 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 329 330 mutex_lock(&g_tf_lock); 331 list_add_tail(&tf->tf_list, &g_tf_list); 332 mutex_unlock(&g_tf_lock); 333 334 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 335 ">>>>>>>>>>>>>>\n"); 336 pr_debug("Initialized struct target_fabric_configfs: %p for" 337 " %s\n", tf, tf->tf_name); 338 return tf; 339 } 340 EXPORT_SYMBOL(target_fabric_configfs_init); 341 342 /* 343 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 344 */ 345 void target_fabric_configfs_free( 346 struct target_fabric_configfs *tf) 347 { 348 mutex_lock(&g_tf_lock); 349 list_del(&tf->tf_list); 350 mutex_unlock(&g_tf_lock); 351 352 kfree(tf); 353 } 354 EXPORT_SYMBOL(target_fabric_configfs_free); 355 356 /* 357 * Perform a sanity check of the passed tf->tf_ops before completing 358 * TCM fabric module registration. 359 */ 360 static int target_fabric_tf_ops_check( 361 struct target_fabric_configfs *tf) 362 { 363 struct target_core_fabric_ops *tfo = &tf->tf_ops; 364 365 if (!tfo->get_fabric_name) { 366 pr_err("Missing tfo->get_fabric_name()\n"); 367 return -EINVAL; 368 } 369 if (!tfo->get_fabric_proto_ident) { 370 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 371 return -EINVAL; 372 } 373 if (!tfo->tpg_get_wwn) { 374 pr_err("Missing tfo->tpg_get_wwn()\n"); 375 return -EINVAL; 376 } 377 if (!tfo->tpg_get_tag) { 378 pr_err("Missing tfo->tpg_get_tag()\n"); 379 return -EINVAL; 380 } 381 if (!tfo->tpg_get_default_depth) { 382 pr_err("Missing tfo->tpg_get_default_depth()\n"); 383 return -EINVAL; 384 } 385 if (!tfo->tpg_get_pr_transport_id) { 386 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 387 return -EINVAL; 388 } 389 if (!tfo->tpg_get_pr_transport_id_len) { 390 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 391 return -EINVAL; 392 } 393 if (!tfo->tpg_check_demo_mode) { 394 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 395 return -EINVAL; 396 } 397 if (!tfo->tpg_check_demo_mode_cache) { 398 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 399 return -EINVAL; 400 } 401 if (!tfo->tpg_check_demo_mode_write_protect) { 402 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 403 return -EINVAL; 404 } 405 if (!tfo->tpg_check_prod_mode_write_protect) { 406 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 407 return -EINVAL; 408 } 409 if (!tfo->tpg_alloc_fabric_acl) { 410 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 411 return -EINVAL; 412 } 413 if (!tfo->tpg_release_fabric_acl) { 414 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 415 return -EINVAL; 416 } 417 if (!tfo->tpg_get_inst_index) { 418 pr_err("Missing tfo->tpg_get_inst_index()\n"); 419 return -EINVAL; 420 } 421 if (!tfo->release_cmd) { 422 pr_err("Missing tfo->release_cmd()\n"); 423 return -EINVAL; 424 } 425 if (!tfo->shutdown_session) { 426 pr_err("Missing tfo->shutdown_session()\n"); 427 return -EINVAL; 428 } 429 if (!tfo->close_session) { 430 pr_err("Missing tfo->close_session()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->sess_get_index) { 434 pr_err("Missing tfo->sess_get_index()\n"); 435 return -EINVAL; 436 } 437 if (!tfo->write_pending) { 438 pr_err("Missing tfo->write_pending()\n"); 439 return -EINVAL; 440 } 441 if (!tfo->write_pending_status) { 442 pr_err("Missing tfo->write_pending_status()\n"); 443 return -EINVAL; 444 } 445 if (!tfo->set_default_node_attributes) { 446 pr_err("Missing tfo->set_default_node_attributes()\n"); 447 return -EINVAL; 448 } 449 if (!tfo->get_task_tag) { 450 pr_err("Missing tfo->get_task_tag()\n"); 451 return -EINVAL; 452 } 453 if (!tfo->get_cmd_state) { 454 pr_err("Missing tfo->get_cmd_state()\n"); 455 return -EINVAL; 456 } 457 if (!tfo->queue_data_in) { 458 pr_err("Missing tfo->queue_data_in()\n"); 459 return -EINVAL; 460 } 461 if (!tfo->queue_status) { 462 pr_err("Missing tfo->queue_status()\n"); 463 return -EINVAL; 464 } 465 if (!tfo->queue_tm_rsp) { 466 pr_err("Missing tfo->queue_tm_rsp()\n"); 467 return -EINVAL; 468 } 469 if (!tfo->aborted_task) { 470 pr_err("Missing tfo->aborted_task()\n"); 471 return -EINVAL; 472 } 473 /* 474 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 475 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 476 * target_core_fabric_configfs.c WWN+TPG group context code. 477 */ 478 if (!tfo->fabric_make_wwn) { 479 pr_err("Missing tfo->fabric_make_wwn()\n"); 480 return -EINVAL; 481 } 482 if (!tfo->fabric_drop_wwn) { 483 pr_err("Missing tfo->fabric_drop_wwn()\n"); 484 return -EINVAL; 485 } 486 if (!tfo->fabric_make_tpg) { 487 pr_err("Missing tfo->fabric_make_tpg()\n"); 488 return -EINVAL; 489 } 490 if (!tfo->fabric_drop_tpg) { 491 pr_err("Missing tfo->fabric_drop_tpg()\n"); 492 return -EINVAL; 493 } 494 495 return 0; 496 } 497 498 /* 499 * Called 2nd from fabric module with returned parameter of 500 * struct target_fabric_configfs * from target_fabric_configfs_init(). 501 * 502 * Upon a successful registration, the new fabric's struct config_item is 503 * return. Also, a pointer to this struct is set in the passed 504 * struct target_fabric_configfs. 505 */ 506 int target_fabric_configfs_register( 507 struct target_fabric_configfs *tf) 508 { 509 int ret; 510 511 if (!tf) { 512 pr_err("Unable to locate target_fabric_configfs" 513 " pointer\n"); 514 return -EINVAL; 515 } 516 if (!tf->tf_subsys) { 517 pr_err("Unable to target struct config_subsystem" 518 " pointer\n"); 519 return -EINVAL; 520 } 521 ret = target_fabric_tf_ops_check(tf); 522 if (ret < 0) 523 return ret; 524 525 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 526 ">>>>>>>>>>\n"); 527 return 0; 528 } 529 EXPORT_SYMBOL(target_fabric_configfs_register); 530 531 void target_fabric_configfs_deregister( 532 struct target_fabric_configfs *tf) 533 { 534 struct configfs_subsystem *su; 535 536 if (!tf) { 537 pr_err("Unable to locate passed target_fabric_" 538 "configfs\n"); 539 return; 540 } 541 su = tf->tf_subsys; 542 if (!su) { 543 pr_err("Unable to locate passed tf->tf_subsys" 544 " pointer\n"); 545 return; 546 } 547 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 548 ">>>>>>>>>>>>\n"); 549 mutex_lock(&g_tf_lock); 550 if (atomic_read(&tf->tf_access_cnt)) { 551 mutex_unlock(&g_tf_lock); 552 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 553 tf->tf_name); 554 BUG(); 555 } 556 list_del(&tf->tf_list); 557 mutex_unlock(&g_tf_lock); 558 559 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 560 " %s\n", tf->tf_name); 561 tf->tf_module = NULL; 562 tf->tf_subsys = NULL; 563 kfree(tf); 564 565 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 566 ">>>>>\n"); 567 } 568 EXPORT_SYMBOL(target_fabric_configfs_deregister); 569 570 /*############################################################################## 571 // Stop functions called by external Target Fabrics Modules 572 //############################################################################*/ 573 574 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 575 576 #define DEF_DEV_ATTRIB_SHOW(_name) \ 577 static ssize_t target_core_dev_show_attr_##_name( \ 578 struct se_dev_attrib *da, \ 579 char *page) \ 580 { \ 581 return snprintf(page, PAGE_SIZE, "%u\n", \ 582 (u32)da->da_dev->dev_attrib._name); \ 583 } 584 585 #define DEF_DEV_ATTRIB_STORE(_name) \ 586 static ssize_t target_core_dev_store_attr_##_name( \ 587 struct se_dev_attrib *da, \ 588 const char *page, \ 589 size_t count) \ 590 { \ 591 unsigned long val; \ 592 int ret; \ 593 \ 594 ret = kstrtoul(page, 0, &val); \ 595 if (ret < 0) { \ 596 pr_err("kstrtoul() failed with" \ 597 " ret: %d\n", ret); \ 598 return -EINVAL; \ 599 } \ 600 ret = se_dev_set_##_name(da->da_dev, (u32)val); \ 601 \ 602 return (!ret) ? count : -EINVAL; \ 603 } 604 605 #define DEF_DEV_ATTRIB(_name) \ 606 DEF_DEV_ATTRIB_SHOW(_name); \ 607 DEF_DEV_ATTRIB_STORE(_name); 608 609 #define DEF_DEV_ATTRIB_RO(_name) \ 610 DEF_DEV_ATTRIB_SHOW(_name); 611 612 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 613 #define SE_DEV_ATTR(_name, _mode) \ 614 static struct target_core_dev_attrib_attribute \ 615 target_core_dev_attrib_##_name = \ 616 __CONFIGFS_EATTR(_name, _mode, \ 617 target_core_dev_show_attr_##_name, \ 618 target_core_dev_store_attr_##_name); 619 620 #define SE_DEV_ATTR_RO(_name); \ 621 static struct target_core_dev_attrib_attribute \ 622 target_core_dev_attrib_##_name = \ 623 __CONFIGFS_EATTR_RO(_name, \ 624 target_core_dev_show_attr_##_name); 625 626 DEF_DEV_ATTRIB(emulate_model_alias); 627 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR); 628 629 DEF_DEV_ATTRIB(emulate_dpo); 630 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 631 632 DEF_DEV_ATTRIB(emulate_fua_write); 633 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 634 635 DEF_DEV_ATTRIB(emulate_fua_read); 636 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 637 638 DEF_DEV_ATTRIB(emulate_write_cache); 639 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 640 641 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 642 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 643 644 DEF_DEV_ATTRIB(emulate_tas); 645 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 646 647 DEF_DEV_ATTRIB(emulate_tpu); 648 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 649 650 DEF_DEV_ATTRIB(emulate_tpws); 651 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 652 653 DEF_DEV_ATTRIB(emulate_caw); 654 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR); 655 656 DEF_DEV_ATTRIB(emulate_3pc); 657 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR); 658 659 DEF_DEV_ATTRIB(pi_prot_type); 660 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR); 661 662 DEF_DEV_ATTRIB_RO(hw_pi_prot_type); 663 SE_DEV_ATTR_RO(hw_pi_prot_type); 664 665 DEF_DEV_ATTRIB(pi_prot_format); 666 SE_DEV_ATTR(pi_prot_format, 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(force_pr_aptpl); 678 SE_DEV_ATTR(force_pr_aptpl, S_IRUGO | S_IWUSR); 679 680 DEF_DEV_ATTRIB_RO(hw_block_size); 681 SE_DEV_ATTR_RO(hw_block_size); 682 683 DEF_DEV_ATTRIB(block_size); 684 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 685 686 DEF_DEV_ATTRIB_RO(hw_max_sectors); 687 SE_DEV_ATTR_RO(hw_max_sectors); 688 689 DEF_DEV_ATTRIB(fabric_max_sectors); 690 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR); 691 692 DEF_DEV_ATTRIB(optimal_sectors); 693 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 694 695 DEF_DEV_ATTRIB_RO(hw_queue_depth); 696 SE_DEV_ATTR_RO(hw_queue_depth); 697 698 DEF_DEV_ATTRIB(queue_depth); 699 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 700 701 DEF_DEV_ATTRIB(max_unmap_lba_count); 702 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 703 704 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 705 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 706 707 DEF_DEV_ATTRIB(unmap_granularity); 708 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 709 710 DEF_DEV_ATTRIB(unmap_granularity_alignment); 711 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 712 713 DEF_DEV_ATTRIB(max_write_same_len); 714 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR); 715 716 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 717 718 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 719 &target_core_dev_attrib_emulate_model_alias.attr, 720 &target_core_dev_attrib_emulate_dpo.attr, 721 &target_core_dev_attrib_emulate_fua_write.attr, 722 &target_core_dev_attrib_emulate_fua_read.attr, 723 &target_core_dev_attrib_emulate_write_cache.attr, 724 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 725 &target_core_dev_attrib_emulate_tas.attr, 726 &target_core_dev_attrib_emulate_tpu.attr, 727 &target_core_dev_attrib_emulate_tpws.attr, 728 &target_core_dev_attrib_emulate_caw.attr, 729 &target_core_dev_attrib_emulate_3pc.attr, 730 &target_core_dev_attrib_pi_prot_type.attr, 731 &target_core_dev_attrib_hw_pi_prot_type.attr, 732 &target_core_dev_attrib_pi_prot_format.attr, 733 &target_core_dev_attrib_enforce_pr_isids.attr, 734 &target_core_dev_attrib_force_pr_aptpl.attr, 735 &target_core_dev_attrib_is_nonrot.attr, 736 &target_core_dev_attrib_emulate_rest_reord.attr, 737 &target_core_dev_attrib_hw_block_size.attr, 738 &target_core_dev_attrib_block_size.attr, 739 &target_core_dev_attrib_hw_max_sectors.attr, 740 &target_core_dev_attrib_fabric_max_sectors.attr, 741 &target_core_dev_attrib_optimal_sectors.attr, 742 &target_core_dev_attrib_hw_queue_depth.attr, 743 &target_core_dev_attrib_queue_depth.attr, 744 &target_core_dev_attrib_max_unmap_lba_count.attr, 745 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 746 &target_core_dev_attrib_unmap_granularity.attr, 747 &target_core_dev_attrib_unmap_granularity_alignment.attr, 748 &target_core_dev_attrib_max_write_same_len.attr, 749 NULL, 750 }; 751 752 static struct configfs_item_operations target_core_dev_attrib_ops = { 753 .show_attribute = target_core_dev_attrib_attr_show, 754 .store_attribute = target_core_dev_attrib_attr_store, 755 }; 756 757 static struct config_item_type target_core_dev_attrib_cit = { 758 .ct_item_ops = &target_core_dev_attrib_ops, 759 .ct_attrs = target_core_dev_attrib_attrs, 760 .ct_owner = THIS_MODULE, 761 }; 762 763 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 764 765 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 766 767 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 768 #define SE_DEV_WWN_ATTR(_name, _mode) \ 769 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 770 __CONFIGFS_EATTR(_name, _mode, \ 771 target_core_dev_wwn_show_attr_##_name, \ 772 target_core_dev_wwn_store_attr_##_name); 773 774 #define SE_DEV_WWN_ATTR_RO(_name); \ 775 do { \ 776 static struct target_core_dev_wwn_attribute \ 777 target_core_dev_wwn_##_name = \ 778 __CONFIGFS_EATTR_RO(_name, \ 779 target_core_dev_wwn_show_attr_##_name); \ 780 } while (0); 781 782 /* 783 * VPD page 0x80 Unit serial 784 */ 785 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 786 struct t10_wwn *t10_wwn, 787 char *page) 788 { 789 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 790 &t10_wwn->unit_serial[0]); 791 } 792 793 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 794 struct t10_wwn *t10_wwn, 795 const char *page, 796 size_t count) 797 { 798 struct se_device *dev = t10_wwn->t10_dev; 799 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 800 801 /* 802 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 803 * from the struct scsi_device level firmware, do not allow 804 * VPD Unit Serial to be emulated. 805 * 806 * Note this struct scsi_device could also be emulating VPD 807 * information from its drivers/scsi LLD. But for now we assume 808 * it is doing 'the right thing' wrt a world wide unique 809 * VPD Unit Serial Number that OS dependent multipath can depend on. 810 */ 811 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 812 pr_err("Underlying SCSI device firmware provided VPD" 813 " Unit Serial, ignoring request\n"); 814 return -EOPNOTSUPP; 815 } 816 817 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 818 pr_err("Emulated VPD Unit Serial exceeds" 819 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 820 return -EOVERFLOW; 821 } 822 /* 823 * Check to see if any active $FABRIC_MOD exports exist. If they 824 * do exist, fail here as changing this information on the fly 825 * (underneath the initiator side OS dependent multipath code) 826 * could cause negative effects. 827 */ 828 if (dev->export_count) { 829 pr_err("Unable to set VPD Unit Serial while" 830 " active %d $FABRIC_MOD exports exist\n", 831 dev->export_count); 832 return -EINVAL; 833 } 834 835 /* 836 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 837 * 838 * Also, strip any newline added from the userspace 839 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 840 */ 841 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 842 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 843 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 844 "%s", strstrip(buf)); 845 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 846 847 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 848 " %s\n", dev->t10_wwn.unit_serial); 849 850 return count; 851 } 852 853 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 854 855 /* 856 * VPD page 0x83 Protocol Identifier 857 */ 858 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 859 struct t10_wwn *t10_wwn, 860 char *page) 861 { 862 struct t10_vpd *vpd; 863 unsigned char buf[VPD_TMP_BUF_SIZE]; 864 ssize_t len = 0; 865 866 memset(buf, 0, VPD_TMP_BUF_SIZE); 867 868 spin_lock(&t10_wwn->t10_vpd_lock); 869 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 870 if (!vpd->protocol_identifier_set) 871 continue; 872 873 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 874 875 if (len + strlen(buf) >= PAGE_SIZE) 876 break; 877 878 len += sprintf(page+len, "%s", buf); 879 } 880 spin_unlock(&t10_wwn->t10_vpd_lock); 881 882 return len; 883 } 884 885 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 886 struct t10_wwn *t10_wwn, 887 const char *page, 888 size_t count) 889 { 890 return -ENOSYS; 891 } 892 893 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 894 895 /* 896 * Generic wrapper for dumping VPD identifiers by association. 897 */ 898 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 899 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 900 struct t10_wwn *t10_wwn, \ 901 char *page) \ 902 { \ 903 struct t10_vpd *vpd; \ 904 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 905 ssize_t len = 0; \ 906 \ 907 spin_lock(&t10_wwn->t10_vpd_lock); \ 908 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 909 if (vpd->association != _assoc) \ 910 continue; \ 911 \ 912 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 913 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 914 if (len + strlen(buf) >= PAGE_SIZE) \ 915 break; \ 916 len += sprintf(page+len, "%s", buf); \ 917 \ 918 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 919 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 920 if (len + strlen(buf) >= PAGE_SIZE) \ 921 break; \ 922 len += sprintf(page+len, "%s", buf); \ 923 \ 924 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 925 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 926 if (len + strlen(buf) >= PAGE_SIZE) \ 927 break; \ 928 len += sprintf(page+len, "%s", buf); \ 929 } \ 930 spin_unlock(&t10_wwn->t10_vpd_lock); \ 931 \ 932 return len; \ 933 } 934 935 /* 936 * VPD page 0x83 Association: Logical Unit 937 */ 938 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 939 940 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 941 struct t10_wwn *t10_wwn, 942 const char *page, 943 size_t count) 944 { 945 return -ENOSYS; 946 } 947 948 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 949 950 /* 951 * VPD page 0x83 Association: Target Port 952 */ 953 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 954 955 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 956 struct t10_wwn *t10_wwn, 957 const char *page, 958 size_t count) 959 { 960 return -ENOSYS; 961 } 962 963 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 964 965 /* 966 * VPD page 0x83 Association: SCSI Target Device 967 */ 968 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 969 970 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 971 struct t10_wwn *t10_wwn, 972 const char *page, 973 size_t count) 974 { 975 return -ENOSYS; 976 } 977 978 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 979 980 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 981 982 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 983 &target_core_dev_wwn_vpd_unit_serial.attr, 984 &target_core_dev_wwn_vpd_protocol_identifier.attr, 985 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 986 &target_core_dev_wwn_vpd_assoc_target_port.attr, 987 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 988 NULL, 989 }; 990 991 static struct configfs_item_operations target_core_dev_wwn_ops = { 992 .show_attribute = target_core_dev_wwn_attr_show, 993 .store_attribute = target_core_dev_wwn_attr_store, 994 }; 995 996 static struct config_item_type target_core_dev_wwn_cit = { 997 .ct_item_ops = &target_core_dev_wwn_ops, 998 .ct_attrs = target_core_dev_wwn_attrs, 999 .ct_owner = THIS_MODULE, 1000 }; 1001 1002 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 1003 1004 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 1005 1006 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 1007 #define SE_DEV_PR_ATTR(_name, _mode) \ 1008 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1009 __CONFIGFS_EATTR(_name, _mode, \ 1010 target_core_dev_pr_show_attr_##_name, \ 1011 target_core_dev_pr_store_attr_##_name); 1012 1013 #define SE_DEV_PR_ATTR_RO(_name); \ 1014 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1015 __CONFIGFS_EATTR_RO(_name, \ 1016 target_core_dev_pr_show_attr_##_name); 1017 1018 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1019 char *page) 1020 { 1021 struct se_node_acl *se_nacl; 1022 struct t10_pr_registration *pr_reg; 1023 char i_buf[PR_REG_ISID_ID_LEN]; 1024 1025 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1026 1027 pr_reg = dev->dev_pr_res_holder; 1028 if (!pr_reg) 1029 return sprintf(page, "No SPC-3 Reservation holder\n"); 1030 1031 se_nacl = pr_reg->pr_reg_nacl; 1032 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1033 1034 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1035 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1036 se_nacl->initiatorname, i_buf); 1037 } 1038 1039 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1040 char *page) 1041 { 1042 struct se_node_acl *se_nacl; 1043 ssize_t len; 1044 1045 se_nacl = dev->dev_reserved_node_acl; 1046 if (se_nacl) { 1047 len = sprintf(page, 1048 "SPC-2 Reservation: %s Initiator: %s\n", 1049 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1050 se_nacl->initiatorname); 1051 } else { 1052 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1053 } 1054 return len; 1055 } 1056 1057 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 1058 char *page) 1059 { 1060 int ret; 1061 1062 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1063 return sprintf(page, "Passthrough\n"); 1064 1065 spin_lock(&dev->dev_reservation_lock); 1066 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1067 ret = target_core_dev_pr_show_spc2_res(dev, page); 1068 else 1069 ret = target_core_dev_pr_show_spc3_res(dev, page); 1070 spin_unlock(&dev->dev_reservation_lock); 1071 return ret; 1072 } 1073 1074 SE_DEV_PR_ATTR_RO(res_holder); 1075 1076 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1077 struct se_device *dev, char *page) 1078 { 1079 ssize_t len = 0; 1080 1081 spin_lock(&dev->dev_reservation_lock); 1082 if (!dev->dev_pr_res_holder) { 1083 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1084 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1085 len = sprintf(page, "SPC-3 Reservation: All Target" 1086 " Ports registration\n"); 1087 } else { 1088 len = sprintf(page, "SPC-3 Reservation: Single" 1089 " Target Port registration\n"); 1090 } 1091 1092 spin_unlock(&dev->dev_reservation_lock); 1093 return len; 1094 } 1095 1096 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1097 1098 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1099 struct se_device *dev, char *page) 1100 { 1101 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 1102 } 1103 1104 SE_DEV_PR_ATTR_RO(res_pr_generation); 1105 1106 /* 1107 * res_pr_holder_tg_port 1108 */ 1109 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1110 struct se_device *dev, char *page) 1111 { 1112 struct se_node_acl *se_nacl; 1113 struct se_lun *lun; 1114 struct se_portal_group *se_tpg; 1115 struct t10_pr_registration *pr_reg; 1116 struct target_core_fabric_ops *tfo; 1117 ssize_t len = 0; 1118 1119 spin_lock(&dev->dev_reservation_lock); 1120 pr_reg = dev->dev_pr_res_holder; 1121 if (!pr_reg) { 1122 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1123 goto out_unlock; 1124 } 1125 1126 se_nacl = pr_reg->pr_reg_nacl; 1127 se_tpg = se_nacl->se_tpg; 1128 lun = pr_reg->pr_reg_tg_pt_lun; 1129 tfo = se_tpg->se_tpg_tfo; 1130 1131 len += sprintf(page+len, "SPC-3 Reservation: %s" 1132 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1133 tfo->tpg_get_wwn(se_tpg)); 1134 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1135 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1136 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1137 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1138 tfo->get_fabric_name(), lun->unpacked_lun); 1139 1140 out_unlock: 1141 spin_unlock(&dev->dev_reservation_lock); 1142 return len; 1143 } 1144 1145 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1146 1147 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1148 struct se_device *dev, char *page) 1149 { 1150 struct target_core_fabric_ops *tfo; 1151 struct t10_pr_registration *pr_reg; 1152 unsigned char buf[384]; 1153 char i_buf[PR_REG_ISID_ID_LEN]; 1154 ssize_t len = 0; 1155 int reg_count = 0; 1156 1157 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1158 1159 spin_lock(&dev->t10_pr.registration_lock); 1160 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1161 pr_reg_list) { 1162 1163 memset(buf, 0, 384); 1164 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1165 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1166 core_pr_dump_initiator_port(pr_reg, i_buf, 1167 PR_REG_ISID_ID_LEN); 1168 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1169 tfo->get_fabric_name(), 1170 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1171 pr_reg->pr_res_generation); 1172 1173 if (len + strlen(buf) >= PAGE_SIZE) 1174 break; 1175 1176 len += sprintf(page+len, "%s", buf); 1177 reg_count++; 1178 } 1179 spin_unlock(&dev->t10_pr.registration_lock); 1180 1181 if (!reg_count) 1182 len += sprintf(page+len, "None\n"); 1183 1184 return len; 1185 } 1186 1187 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1188 1189 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1190 struct se_device *dev, char *page) 1191 { 1192 struct t10_pr_registration *pr_reg; 1193 ssize_t len = 0; 1194 1195 spin_lock(&dev->dev_reservation_lock); 1196 pr_reg = dev->dev_pr_res_holder; 1197 if (pr_reg) { 1198 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1199 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1200 } else { 1201 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1202 } 1203 1204 spin_unlock(&dev->dev_reservation_lock); 1205 return len; 1206 } 1207 1208 SE_DEV_PR_ATTR_RO(res_pr_type); 1209 1210 static ssize_t target_core_dev_pr_show_attr_res_type( 1211 struct se_device *dev, char *page) 1212 { 1213 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1214 return sprintf(page, "SPC_PASSTHROUGH\n"); 1215 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1216 return sprintf(page, "SPC2_RESERVATIONS\n"); 1217 else 1218 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1219 } 1220 1221 SE_DEV_PR_ATTR_RO(res_type); 1222 1223 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1224 struct se_device *dev, char *page) 1225 { 1226 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1227 return 0; 1228 1229 return sprintf(page, "APTPL Bit Status: %s\n", 1230 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1231 } 1232 1233 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1234 1235 /* 1236 * res_aptpl_metadata 1237 */ 1238 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1239 struct se_device *dev, char *page) 1240 { 1241 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1242 return 0; 1243 1244 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1245 } 1246 1247 enum { 1248 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1249 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1250 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1251 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1252 }; 1253 1254 static match_table_t tokens = { 1255 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1256 {Opt_initiator_node, "initiator_node=%s"}, 1257 {Opt_initiator_sid, "initiator_sid=%s"}, 1258 {Opt_sa_res_key, "sa_res_key=%s"}, 1259 {Opt_res_holder, "res_holder=%d"}, 1260 {Opt_res_type, "res_type=%d"}, 1261 {Opt_res_scope, "res_scope=%d"}, 1262 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1263 {Opt_mapped_lun, "mapped_lun=%d"}, 1264 {Opt_target_fabric, "target_fabric=%s"}, 1265 {Opt_target_node, "target_node=%s"}, 1266 {Opt_tpgt, "tpgt=%d"}, 1267 {Opt_port_rtpi, "port_rtpi=%d"}, 1268 {Opt_target_lun, "target_lun=%d"}, 1269 {Opt_err, NULL} 1270 }; 1271 1272 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1273 struct se_device *dev, 1274 const char *page, 1275 size_t count) 1276 { 1277 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1278 unsigned char *t_fabric = NULL, *t_port = NULL; 1279 char *orig, *ptr, *opts; 1280 substring_t args[MAX_OPT_ARGS]; 1281 unsigned long long tmp_ll; 1282 u64 sa_res_key = 0; 1283 u32 mapped_lun = 0, target_lun = 0; 1284 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1285 u16 port_rpti = 0, tpgt = 0; 1286 u8 type = 0, scope; 1287 1288 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1289 return 0; 1290 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1291 return 0; 1292 1293 if (dev->export_count) { 1294 pr_debug("Unable to process APTPL metadata while" 1295 " active fabric exports exist\n"); 1296 return -EINVAL; 1297 } 1298 1299 opts = kstrdup(page, GFP_KERNEL); 1300 if (!opts) 1301 return -ENOMEM; 1302 1303 orig = opts; 1304 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1305 if (!*ptr) 1306 continue; 1307 1308 token = match_token(ptr, tokens, args); 1309 switch (token) { 1310 case Opt_initiator_fabric: 1311 i_fabric = match_strdup(args); 1312 if (!i_fabric) { 1313 ret = -ENOMEM; 1314 goto out; 1315 } 1316 break; 1317 case Opt_initiator_node: 1318 i_port = match_strdup(args); 1319 if (!i_port) { 1320 ret = -ENOMEM; 1321 goto out; 1322 } 1323 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1324 pr_err("APTPL metadata initiator_node=" 1325 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1326 PR_APTPL_MAX_IPORT_LEN); 1327 ret = -EINVAL; 1328 break; 1329 } 1330 break; 1331 case Opt_initiator_sid: 1332 isid = match_strdup(args); 1333 if (!isid) { 1334 ret = -ENOMEM; 1335 goto out; 1336 } 1337 if (strlen(isid) >= PR_REG_ISID_LEN) { 1338 pr_err("APTPL metadata initiator_isid" 1339 "= exceeds PR_REG_ISID_LEN: %d\n", 1340 PR_REG_ISID_LEN); 1341 ret = -EINVAL; 1342 break; 1343 } 1344 break; 1345 case Opt_sa_res_key: 1346 ret = kstrtoull(args->from, 0, &tmp_ll); 1347 if (ret < 0) { 1348 pr_err("kstrtoull() failed for sa_res_key=\n"); 1349 goto out; 1350 } 1351 sa_res_key = (u64)tmp_ll; 1352 break; 1353 /* 1354 * PR APTPL Metadata for Reservation 1355 */ 1356 case Opt_res_holder: 1357 match_int(args, &arg); 1358 res_holder = arg; 1359 break; 1360 case Opt_res_type: 1361 match_int(args, &arg); 1362 type = (u8)arg; 1363 break; 1364 case Opt_res_scope: 1365 match_int(args, &arg); 1366 scope = (u8)arg; 1367 break; 1368 case Opt_res_all_tg_pt: 1369 match_int(args, &arg); 1370 all_tg_pt = (int)arg; 1371 break; 1372 case Opt_mapped_lun: 1373 match_int(args, &arg); 1374 mapped_lun = (u32)arg; 1375 break; 1376 /* 1377 * PR APTPL Metadata for Target Port 1378 */ 1379 case Opt_target_fabric: 1380 t_fabric = match_strdup(args); 1381 if (!t_fabric) { 1382 ret = -ENOMEM; 1383 goto out; 1384 } 1385 break; 1386 case Opt_target_node: 1387 t_port = match_strdup(args); 1388 if (!t_port) { 1389 ret = -ENOMEM; 1390 goto out; 1391 } 1392 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1393 pr_err("APTPL metadata target_node=" 1394 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1395 PR_APTPL_MAX_TPORT_LEN); 1396 ret = -EINVAL; 1397 break; 1398 } 1399 break; 1400 case Opt_tpgt: 1401 match_int(args, &arg); 1402 tpgt = (u16)arg; 1403 break; 1404 case Opt_port_rtpi: 1405 match_int(args, &arg); 1406 port_rpti = (u16)arg; 1407 break; 1408 case Opt_target_lun: 1409 match_int(args, &arg); 1410 target_lun = (u32)arg; 1411 break; 1412 default: 1413 break; 1414 } 1415 } 1416 1417 if (!i_port || !t_port || !sa_res_key) { 1418 pr_err("Illegal parameters for APTPL registration\n"); 1419 ret = -EINVAL; 1420 goto out; 1421 } 1422 1423 if (res_holder && !(type)) { 1424 pr_err("Illegal PR type: 0x%02x for reservation" 1425 " holder\n", type); 1426 ret = -EINVAL; 1427 goto out; 1428 } 1429 1430 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1431 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1432 res_holder, all_tg_pt, type); 1433 out: 1434 kfree(i_fabric); 1435 kfree(i_port); 1436 kfree(isid); 1437 kfree(t_fabric); 1438 kfree(t_port); 1439 kfree(orig); 1440 return (ret == 0) ? count : ret; 1441 } 1442 1443 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1444 1445 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1446 1447 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1448 &target_core_dev_pr_res_holder.attr, 1449 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1450 &target_core_dev_pr_res_pr_generation.attr, 1451 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1452 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1453 &target_core_dev_pr_res_pr_type.attr, 1454 &target_core_dev_pr_res_type.attr, 1455 &target_core_dev_pr_res_aptpl_active.attr, 1456 &target_core_dev_pr_res_aptpl_metadata.attr, 1457 NULL, 1458 }; 1459 1460 static struct configfs_item_operations target_core_dev_pr_ops = { 1461 .show_attribute = target_core_dev_pr_attr_show, 1462 .store_attribute = target_core_dev_pr_attr_store, 1463 }; 1464 1465 static struct config_item_type target_core_dev_pr_cit = { 1466 .ct_item_ops = &target_core_dev_pr_ops, 1467 .ct_attrs = target_core_dev_pr_attrs, 1468 .ct_owner = THIS_MODULE, 1469 }; 1470 1471 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1472 1473 /* Start functions for struct config_item_type target_core_dev_cit */ 1474 1475 static ssize_t target_core_show_dev_info(void *p, char *page) 1476 { 1477 struct se_device *dev = p; 1478 struct se_subsystem_api *t = dev->transport; 1479 int bl = 0; 1480 ssize_t read_bytes = 0; 1481 1482 transport_dump_dev_state(dev, page, &bl); 1483 read_bytes += bl; 1484 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes); 1485 return read_bytes; 1486 } 1487 1488 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1489 .attr = { .ca_owner = THIS_MODULE, 1490 .ca_name = "info", 1491 .ca_mode = S_IRUGO }, 1492 .show = target_core_show_dev_info, 1493 .store = NULL, 1494 }; 1495 1496 static ssize_t target_core_store_dev_control( 1497 void *p, 1498 const char *page, 1499 size_t count) 1500 { 1501 struct se_device *dev = p; 1502 struct se_subsystem_api *t = dev->transport; 1503 1504 return t->set_configfs_dev_params(dev, page, count); 1505 } 1506 1507 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1508 .attr = { .ca_owner = THIS_MODULE, 1509 .ca_name = "control", 1510 .ca_mode = S_IWUSR }, 1511 .show = NULL, 1512 .store = target_core_store_dev_control, 1513 }; 1514 1515 static ssize_t target_core_show_dev_alias(void *p, char *page) 1516 { 1517 struct se_device *dev = p; 1518 1519 if (!(dev->dev_flags & DF_USING_ALIAS)) 1520 return 0; 1521 1522 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1523 } 1524 1525 static ssize_t target_core_store_dev_alias( 1526 void *p, 1527 const char *page, 1528 size_t count) 1529 { 1530 struct se_device *dev = p; 1531 struct se_hba *hba = dev->se_hba; 1532 ssize_t read_bytes; 1533 1534 if (count > (SE_DEV_ALIAS_LEN-1)) { 1535 pr_err("alias count: %d exceeds" 1536 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1537 SE_DEV_ALIAS_LEN-1); 1538 return -EINVAL; 1539 } 1540 1541 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1542 if (!read_bytes) 1543 return -EINVAL; 1544 if (dev->dev_alias[read_bytes - 1] == '\n') 1545 dev->dev_alias[read_bytes - 1] = '\0'; 1546 1547 dev->dev_flags |= DF_USING_ALIAS; 1548 1549 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1550 config_item_name(&hba->hba_group.cg_item), 1551 config_item_name(&dev->dev_group.cg_item), 1552 dev->dev_alias); 1553 1554 return read_bytes; 1555 } 1556 1557 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1558 .attr = { .ca_owner = THIS_MODULE, 1559 .ca_name = "alias", 1560 .ca_mode = S_IRUGO | S_IWUSR }, 1561 .show = target_core_show_dev_alias, 1562 .store = target_core_store_dev_alias, 1563 }; 1564 1565 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1566 { 1567 struct se_device *dev = p; 1568 1569 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1570 return 0; 1571 1572 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1573 } 1574 1575 static ssize_t target_core_store_dev_udev_path( 1576 void *p, 1577 const char *page, 1578 size_t count) 1579 { 1580 struct se_device *dev = p; 1581 struct se_hba *hba = dev->se_hba; 1582 ssize_t read_bytes; 1583 1584 if (count > (SE_UDEV_PATH_LEN-1)) { 1585 pr_err("udev_path count: %d exceeds" 1586 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1587 SE_UDEV_PATH_LEN-1); 1588 return -EINVAL; 1589 } 1590 1591 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1592 "%s", page); 1593 if (!read_bytes) 1594 return -EINVAL; 1595 if (dev->udev_path[read_bytes - 1] == '\n') 1596 dev->udev_path[read_bytes - 1] = '\0'; 1597 1598 dev->dev_flags |= DF_USING_UDEV_PATH; 1599 1600 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1601 config_item_name(&hba->hba_group.cg_item), 1602 config_item_name(&dev->dev_group.cg_item), 1603 dev->udev_path); 1604 1605 return read_bytes; 1606 } 1607 1608 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1609 .attr = { .ca_owner = THIS_MODULE, 1610 .ca_name = "udev_path", 1611 .ca_mode = S_IRUGO | S_IWUSR }, 1612 .show = target_core_show_dev_udev_path, 1613 .store = target_core_store_dev_udev_path, 1614 }; 1615 1616 static ssize_t target_core_show_dev_enable(void *p, char *page) 1617 { 1618 struct se_device *dev = p; 1619 1620 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1621 } 1622 1623 static ssize_t target_core_store_dev_enable( 1624 void *p, 1625 const char *page, 1626 size_t count) 1627 { 1628 struct se_device *dev = p; 1629 char *ptr; 1630 int ret; 1631 1632 ptr = strstr(page, "1"); 1633 if (!ptr) { 1634 pr_err("For dev_enable ops, only valid value" 1635 " is \"1\"\n"); 1636 return -EINVAL; 1637 } 1638 1639 ret = target_configure_device(dev); 1640 if (ret) 1641 return ret; 1642 return count; 1643 } 1644 1645 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1646 .attr = { .ca_owner = THIS_MODULE, 1647 .ca_name = "enable", 1648 .ca_mode = S_IRUGO | S_IWUSR }, 1649 .show = target_core_show_dev_enable, 1650 .store = target_core_store_dev_enable, 1651 }; 1652 1653 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1654 { 1655 struct se_device *dev = p; 1656 struct config_item *lu_ci; 1657 struct t10_alua_lu_gp *lu_gp; 1658 struct t10_alua_lu_gp_member *lu_gp_mem; 1659 ssize_t len = 0; 1660 1661 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1662 if (!lu_gp_mem) 1663 return 0; 1664 1665 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1666 lu_gp = lu_gp_mem->lu_gp; 1667 if (lu_gp) { 1668 lu_ci = &lu_gp->lu_gp_group.cg_item; 1669 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1670 config_item_name(lu_ci), lu_gp->lu_gp_id); 1671 } 1672 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1673 1674 return len; 1675 } 1676 1677 static ssize_t target_core_store_alua_lu_gp( 1678 void *p, 1679 const char *page, 1680 size_t count) 1681 { 1682 struct se_device *dev = p; 1683 struct se_hba *hba = dev->se_hba; 1684 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1685 struct t10_alua_lu_gp_member *lu_gp_mem; 1686 unsigned char buf[LU_GROUP_NAME_BUF]; 1687 int move = 0; 1688 1689 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1690 if (!lu_gp_mem) 1691 return 0; 1692 1693 if (count > LU_GROUP_NAME_BUF) { 1694 pr_err("ALUA LU Group Alias too large!\n"); 1695 return -EINVAL; 1696 } 1697 memset(buf, 0, LU_GROUP_NAME_BUF); 1698 memcpy(buf, page, count); 1699 /* 1700 * Any ALUA logical unit alias besides "NULL" means we will be 1701 * making a new group association. 1702 */ 1703 if (strcmp(strstrip(buf), "NULL")) { 1704 /* 1705 * core_alua_get_lu_gp_by_name() will increment reference to 1706 * struct t10_alua_lu_gp. This reference is released with 1707 * core_alua_get_lu_gp_by_name below(). 1708 */ 1709 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1710 if (!lu_gp_new) 1711 return -ENODEV; 1712 } 1713 1714 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1715 lu_gp = lu_gp_mem->lu_gp; 1716 if (lu_gp) { 1717 /* 1718 * Clearing an existing lu_gp association, and replacing 1719 * with NULL 1720 */ 1721 if (!lu_gp_new) { 1722 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1723 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1724 " %hu\n", 1725 config_item_name(&hba->hba_group.cg_item), 1726 config_item_name(&dev->dev_group.cg_item), 1727 config_item_name(&lu_gp->lu_gp_group.cg_item), 1728 lu_gp->lu_gp_id); 1729 1730 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1731 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1732 1733 return count; 1734 } 1735 /* 1736 * Removing existing association of lu_gp_mem with lu_gp 1737 */ 1738 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1739 move = 1; 1740 } 1741 /* 1742 * Associate lu_gp_mem with lu_gp_new. 1743 */ 1744 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1745 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1746 1747 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1748 " core/alua/lu_gps/%s, ID: %hu\n", 1749 (move) ? "Moving" : "Adding", 1750 config_item_name(&hba->hba_group.cg_item), 1751 config_item_name(&dev->dev_group.cg_item), 1752 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1753 lu_gp_new->lu_gp_id); 1754 1755 core_alua_put_lu_gp_from_name(lu_gp_new); 1756 return count; 1757 } 1758 1759 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1760 .attr = { .ca_owner = THIS_MODULE, 1761 .ca_name = "alua_lu_gp", 1762 .ca_mode = S_IRUGO | S_IWUSR }, 1763 .show = target_core_show_alua_lu_gp, 1764 .store = target_core_store_alua_lu_gp, 1765 }; 1766 1767 static ssize_t target_core_show_dev_lba_map(void *p, char *page) 1768 { 1769 struct se_device *dev = p; 1770 struct t10_alua_lba_map *map; 1771 struct t10_alua_lba_map_member *mem; 1772 char *b = page; 1773 int bl = 0; 1774 char state; 1775 1776 spin_lock(&dev->t10_alua.lba_map_lock); 1777 if (!list_empty(&dev->t10_alua.lba_map_list)) 1778 bl += sprintf(b + bl, "%u %u\n", 1779 dev->t10_alua.lba_map_segment_size, 1780 dev->t10_alua.lba_map_segment_multiplier); 1781 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 1782 bl += sprintf(b + bl, "%llu %llu", 1783 map->lba_map_first_lba, map->lba_map_last_lba); 1784 list_for_each_entry(mem, &map->lba_map_mem_list, 1785 lba_map_mem_list) { 1786 switch (mem->lba_map_mem_alua_state) { 1787 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 1788 state = 'O'; 1789 break; 1790 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 1791 state = 'A'; 1792 break; 1793 case ALUA_ACCESS_STATE_STANDBY: 1794 state = 'S'; 1795 break; 1796 case ALUA_ACCESS_STATE_UNAVAILABLE: 1797 state = 'U'; 1798 break; 1799 default: 1800 state = '.'; 1801 break; 1802 } 1803 bl += sprintf(b + bl, " %d:%c", 1804 mem->lba_map_mem_alua_pg_id, state); 1805 } 1806 bl += sprintf(b + bl, "\n"); 1807 } 1808 spin_unlock(&dev->t10_alua.lba_map_lock); 1809 return bl; 1810 } 1811 1812 static ssize_t target_core_store_dev_lba_map( 1813 void *p, 1814 const char *page, 1815 size_t count) 1816 { 1817 struct se_device *dev = p; 1818 struct t10_alua_lba_map *lba_map = NULL; 1819 struct list_head lba_list; 1820 char *map_entries, *ptr; 1821 char state; 1822 int pg_num = -1, pg; 1823 int ret = 0, num = 0, pg_id, alua_state; 1824 unsigned long start_lba = -1, end_lba = -1; 1825 unsigned long segment_size = -1, segment_mult = -1; 1826 1827 map_entries = kstrdup(page, GFP_KERNEL); 1828 if (!map_entries) 1829 return -ENOMEM; 1830 1831 INIT_LIST_HEAD(&lba_list); 1832 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 1833 if (!*ptr) 1834 continue; 1835 1836 if (num == 0) { 1837 if (sscanf(ptr, "%lu %lu\n", 1838 &segment_size, &segment_mult) != 2) { 1839 pr_err("Invalid line %d\n", num); 1840 ret = -EINVAL; 1841 break; 1842 } 1843 num++; 1844 continue; 1845 } 1846 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 1847 pr_err("Invalid line %d\n", num); 1848 ret = -EINVAL; 1849 break; 1850 } 1851 ptr = strchr(ptr, ' '); 1852 if (!ptr) { 1853 pr_err("Invalid line %d, missing end lba\n", num); 1854 ret = -EINVAL; 1855 break; 1856 } 1857 ptr++; 1858 ptr = strchr(ptr, ' '); 1859 if (!ptr) { 1860 pr_err("Invalid line %d, missing state definitions\n", 1861 num); 1862 ret = -EINVAL; 1863 break; 1864 } 1865 ptr++; 1866 lba_map = core_alua_allocate_lba_map(&lba_list, 1867 start_lba, end_lba); 1868 if (IS_ERR(lba_map)) { 1869 ret = PTR_ERR(lba_map); 1870 break; 1871 } 1872 pg = 0; 1873 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 1874 switch (state) { 1875 case 'O': 1876 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 1877 break; 1878 case 'A': 1879 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 1880 break; 1881 case 'S': 1882 alua_state = ALUA_ACCESS_STATE_STANDBY; 1883 break; 1884 case 'U': 1885 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 1886 break; 1887 default: 1888 pr_err("Invalid ALUA state '%c'\n", state); 1889 ret = -EINVAL; 1890 goto out; 1891 } 1892 1893 ret = core_alua_allocate_lba_map_mem(lba_map, 1894 pg_id, alua_state); 1895 if (ret) { 1896 pr_err("Invalid target descriptor %d:%c " 1897 "at line %d\n", 1898 pg_id, state, num); 1899 break; 1900 } 1901 pg++; 1902 ptr = strchr(ptr, ' '); 1903 if (ptr) 1904 ptr++; 1905 else 1906 break; 1907 } 1908 if (pg_num == -1) 1909 pg_num = pg; 1910 else if (pg != pg_num) { 1911 pr_err("Only %d from %d port groups definitions " 1912 "at line %d\n", pg, pg_num, num); 1913 ret = -EINVAL; 1914 break; 1915 } 1916 num++; 1917 } 1918 out: 1919 if (ret) { 1920 core_alua_free_lba_map(&lba_list); 1921 count = ret; 1922 } else 1923 core_alua_set_lba_map(dev, &lba_list, 1924 segment_size, segment_mult); 1925 kfree(map_entries); 1926 return count; 1927 } 1928 1929 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = { 1930 .attr = { .ca_owner = THIS_MODULE, 1931 .ca_name = "lba_map", 1932 .ca_mode = S_IRUGO | S_IWUSR }, 1933 .show = target_core_show_dev_lba_map, 1934 .store = target_core_store_dev_lba_map, 1935 }; 1936 1937 static struct configfs_attribute *lio_core_dev_attrs[] = { 1938 &target_core_attr_dev_info.attr, 1939 &target_core_attr_dev_control.attr, 1940 &target_core_attr_dev_alias.attr, 1941 &target_core_attr_dev_udev_path.attr, 1942 &target_core_attr_dev_enable.attr, 1943 &target_core_attr_dev_alua_lu_gp.attr, 1944 &target_core_attr_dev_lba_map.attr, 1945 NULL, 1946 }; 1947 1948 static void target_core_dev_release(struct config_item *item) 1949 { 1950 struct config_group *dev_cg = to_config_group(item); 1951 struct se_device *dev = 1952 container_of(dev_cg, struct se_device, dev_group); 1953 1954 kfree(dev_cg->default_groups); 1955 target_free_device(dev); 1956 } 1957 1958 static ssize_t target_core_dev_show(struct config_item *item, 1959 struct configfs_attribute *attr, 1960 char *page) 1961 { 1962 struct config_group *dev_cg = to_config_group(item); 1963 struct se_device *dev = 1964 container_of(dev_cg, struct se_device, dev_group); 1965 struct target_core_configfs_attribute *tc_attr = container_of( 1966 attr, struct target_core_configfs_attribute, attr); 1967 1968 if (!tc_attr->show) 1969 return -EINVAL; 1970 1971 return tc_attr->show(dev, page); 1972 } 1973 1974 static ssize_t target_core_dev_store(struct config_item *item, 1975 struct configfs_attribute *attr, 1976 const char *page, size_t count) 1977 { 1978 struct config_group *dev_cg = to_config_group(item); 1979 struct se_device *dev = 1980 container_of(dev_cg, struct se_device, dev_group); 1981 struct target_core_configfs_attribute *tc_attr = container_of( 1982 attr, struct target_core_configfs_attribute, attr); 1983 1984 if (!tc_attr->store) 1985 return -EINVAL; 1986 1987 return tc_attr->store(dev, page, count); 1988 } 1989 1990 static struct configfs_item_operations target_core_dev_item_ops = { 1991 .release = target_core_dev_release, 1992 .show_attribute = target_core_dev_show, 1993 .store_attribute = target_core_dev_store, 1994 }; 1995 1996 static struct config_item_type target_core_dev_cit = { 1997 .ct_item_ops = &target_core_dev_item_ops, 1998 .ct_attrs = lio_core_dev_attrs, 1999 .ct_owner = THIS_MODULE, 2000 }; 2001 2002 /* End functions for struct config_item_type target_core_dev_cit */ 2003 2004 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2005 2006 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2007 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2008 static struct target_core_alua_lu_gp_attribute \ 2009 target_core_alua_lu_gp_##_name = \ 2010 __CONFIGFS_EATTR(_name, _mode, \ 2011 target_core_alua_lu_gp_show_attr_##_name, \ 2012 target_core_alua_lu_gp_store_attr_##_name); 2013 2014 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2015 static struct target_core_alua_lu_gp_attribute \ 2016 target_core_alua_lu_gp_##_name = \ 2017 __CONFIGFS_EATTR_RO(_name, \ 2018 target_core_alua_lu_gp_show_attr_##_name); 2019 2020 /* 2021 * lu_gp_id 2022 */ 2023 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2024 struct t10_alua_lu_gp *lu_gp, 2025 char *page) 2026 { 2027 if (!lu_gp->lu_gp_valid_id) 2028 return 0; 2029 2030 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2031 } 2032 2033 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2034 struct t10_alua_lu_gp *lu_gp, 2035 const char *page, 2036 size_t count) 2037 { 2038 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2039 unsigned long lu_gp_id; 2040 int ret; 2041 2042 ret = kstrtoul(page, 0, &lu_gp_id); 2043 if (ret < 0) { 2044 pr_err("kstrtoul() returned %d for" 2045 " lu_gp_id\n", ret); 2046 return ret; 2047 } 2048 if (lu_gp_id > 0x0000ffff) { 2049 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2050 " 0x0000ffff\n", lu_gp_id); 2051 return -EINVAL; 2052 } 2053 2054 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2055 if (ret < 0) 2056 return -EINVAL; 2057 2058 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2059 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2060 config_item_name(&alua_lu_gp_cg->cg_item), 2061 lu_gp->lu_gp_id); 2062 2063 return count; 2064 } 2065 2066 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2067 2068 /* 2069 * members 2070 */ 2071 static ssize_t target_core_alua_lu_gp_show_attr_members( 2072 struct t10_alua_lu_gp *lu_gp, 2073 char *page) 2074 { 2075 struct se_device *dev; 2076 struct se_hba *hba; 2077 struct t10_alua_lu_gp_member *lu_gp_mem; 2078 ssize_t len = 0, cur_len; 2079 unsigned char buf[LU_GROUP_NAME_BUF]; 2080 2081 memset(buf, 0, LU_GROUP_NAME_BUF); 2082 2083 spin_lock(&lu_gp->lu_gp_lock); 2084 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2085 dev = lu_gp_mem->lu_gp_mem_dev; 2086 hba = dev->se_hba; 2087 2088 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2089 config_item_name(&hba->hba_group.cg_item), 2090 config_item_name(&dev->dev_group.cg_item)); 2091 cur_len++; /* Extra byte for NULL terminator */ 2092 2093 if ((cur_len + len) > PAGE_SIZE) { 2094 pr_warn("Ran out of lu_gp_show_attr" 2095 "_members buffer\n"); 2096 break; 2097 } 2098 memcpy(page+len, buf, cur_len); 2099 len += cur_len; 2100 } 2101 spin_unlock(&lu_gp->lu_gp_lock); 2102 2103 return len; 2104 } 2105 2106 SE_DEV_ALUA_LU_ATTR_RO(members); 2107 2108 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2109 2110 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2111 &target_core_alua_lu_gp_lu_gp_id.attr, 2112 &target_core_alua_lu_gp_members.attr, 2113 NULL, 2114 }; 2115 2116 static void target_core_alua_lu_gp_release(struct config_item *item) 2117 { 2118 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2119 struct t10_alua_lu_gp, lu_gp_group); 2120 2121 core_alua_free_lu_gp(lu_gp); 2122 } 2123 2124 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2125 .release = target_core_alua_lu_gp_release, 2126 .show_attribute = target_core_alua_lu_gp_attr_show, 2127 .store_attribute = target_core_alua_lu_gp_attr_store, 2128 }; 2129 2130 static struct config_item_type target_core_alua_lu_gp_cit = { 2131 .ct_item_ops = &target_core_alua_lu_gp_ops, 2132 .ct_attrs = target_core_alua_lu_gp_attrs, 2133 .ct_owner = THIS_MODULE, 2134 }; 2135 2136 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2137 2138 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2139 2140 static struct config_group *target_core_alua_create_lu_gp( 2141 struct config_group *group, 2142 const char *name) 2143 { 2144 struct t10_alua_lu_gp *lu_gp; 2145 struct config_group *alua_lu_gp_cg = NULL; 2146 struct config_item *alua_lu_gp_ci = NULL; 2147 2148 lu_gp = core_alua_allocate_lu_gp(name, 0); 2149 if (IS_ERR(lu_gp)) 2150 return NULL; 2151 2152 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2153 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2154 2155 config_group_init_type_name(alua_lu_gp_cg, name, 2156 &target_core_alua_lu_gp_cit); 2157 2158 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2159 " Group: core/alua/lu_gps/%s\n", 2160 config_item_name(alua_lu_gp_ci)); 2161 2162 return alua_lu_gp_cg; 2163 2164 } 2165 2166 static void target_core_alua_drop_lu_gp( 2167 struct config_group *group, 2168 struct config_item *item) 2169 { 2170 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2171 struct t10_alua_lu_gp, lu_gp_group); 2172 2173 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2174 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2175 config_item_name(item), lu_gp->lu_gp_id); 2176 /* 2177 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2178 * -> target_core_alua_lu_gp_release() 2179 */ 2180 config_item_put(item); 2181 } 2182 2183 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2184 .make_group = &target_core_alua_create_lu_gp, 2185 .drop_item = &target_core_alua_drop_lu_gp, 2186 }; 2187 2188 static struct config_item_type target_core_alua_lu_gps_cit = { 2189 .ct_item_ops = NULL, 2190 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2191 .ct_owner = THIS_MODULE, 2192 }; 2193 2194 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2195 2196 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2197 2198 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2199 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2200 static struct target_core_alua_tg_pt_gp_attribute \ 2201 target_core_alua_tg_pt_gp_##_name = \ 2202 __CONFIGFS_EATTR(_name, _mode, \ 2203 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2204 target_core_alua_tg_pt_gp_store_attr_##_name); 2205 2206 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2207 static struct target_core_alua_tg_pt_gp_attribute \ 2208 target_core_alua_tg_pt_gp_##_name = \ 2209 __CONFIGFS_EATTR_RO(_name, \ 2210 target_core_alua_tg_pt_gp_show_attr_##_name); 2211 2212 /* 2213 * alua_access_state 2214 */ 2215 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2216 struct t10_alua_tg_pt_gp *tg_pt_gp, 2217 char *page) 2218 { 2219 return sprintf(page, "%d\n", 2220 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2221 } 2222 2223 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2224 struct t10_alua_tg_pt_gp *tg_pt_gp, 2225 const char *page, 2226 size_t count) 2227 { 2228 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2229 unsigned long tmp; 2230 int new_state, ret; 2231 2232 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2233 pr_err("Unable to do implicit ALUA on non valid" 2234 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2235 return -EINVAL; 2236 } 2237 if (!(dev->dev_flags & DF_CONFIGURED)) { 2238 pr_err("Unable to set alua_access_state while device is" 2239 " not configured\n"); 2240 return -ENODEV; 2241 } 2242 2243 ret = kstrtoul(page, 0, &tmp); 2244 if (ret < 0) { 2245 pr_err("Unable to extract new ALUA access state from" 2246 " %s\n", page); 2247 return ret; 2248 } 2249 new_state = (int)tmp; 2250 2251 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2252 pr_err("Unable to process implicit configfs ALUA" 2253 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2254 return -EINVAL; 2255 } 2256 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2257 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2258 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2259 pr_err("Unable to process implicit configfs ALUA transition" 2260 " while explicit ALUA management is enabled\n"); 2261 return -EINVAL; 2262 } 2263 2264 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2265 NULL, NULL, new_state, 0); 2266 return (!ret) ? count : -EINVAL; 2267 } 2268 2269 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2270 2271 /* 2272 * alua_access_status 2273 */ 2274 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2275 struct t10_alua_tg_pt_gp *tg_pt_gp, 2276 char *page) 2277 { 2278 return sprintf(page, "%s\n", 2279 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2280 } 2281 2282 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2283 struct t10_alua_tg_pt_gp *tg_pt_gp, 2284 const char *page, 2285 size_t count) 2286 { 2287 unsigned long tmp; 2288 int new_status, ret; 2289 2290 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2291 pr_err("Unable to do set ALUA access status on non" 2292 " valid tg_pt_gp ID: %hu\n", 2293 tg_pt_gp->tg_pt_gp_valid_id); 2294 return -EINVAL; 2295 } 2296 2297 ret = kstrtoul(page, 0, &tmp); 2298 if (ret < 0) { 2299 pr_err("Unable to extract new ALUA access status" 2300 " from %s\n", page); 2301 return ret; 2302 } 2303 new_status = (int)tmp; 2304 2305 if ((new_status != ALUA_STATUS_NONE) && 2306 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2307 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2308 pr_err("Illegal ALUA access status: 0x%02x\n", 2309 new_status); 2310 return -EINVAL; 2311 } 2312 2313 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2314 return count; 2315 } 2316 2317 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2318 2319 /* 2320 * alua_access_type 2321 */ 2322 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2323 struct t10_alua_tg_pt_gp *tg_pt_gp, 2324 char *page) 2325 { 2326 return core_alua_show_access_type(tg_pt_gp, page); 2327 } 2328 2329 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2330 struct t10_alua_tg_pt_gp *tg_pt_gp, 2331 const char *page, 2332 size_t count) 2333 { 2334 return core_alua_store_access_type(tg_pt_gp, page, count); 2335 } 2336 2337 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2338 2339 /* 2340 * alua_supported_states 2341 */ 2342 2343 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \ 2344 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \ 2345 struct t10_alua_tg_pt_gp *t, char *p) \ 2346 { \ 2347 return sprintf(p, "%d\n", !!(t->_var & _bit)); \ 2348 } 2349 2350 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \ 2351 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\ 2352 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \ 2353 { \ 2354 unsigned long tmp; \ 2355 int ret; \ 2356 \ 2357 if (!t->tg_pt_gp_valid_id) { \ 2358 pr_err("Unable to do set ##_name ALUA state on non" \ 2359 " valid tg_pt_gp ID: %hu\n", \ 2360 t->tg_pt_gp_valid_id); \ 2361 return -EINVAL; \ 2362 } \ 2363 \ 2364 ret = kstrtoul(p, 0, &tmp); \ 2365 if (ret < 0) { \ 2366 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2367 return -EINVAL; \ 2368 } \ 2369 if (tmp > 1) { \ 2370 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2371 return -EINVAL; \ 2372 } \ 2373 if (tmp) \ 2374 t->_var |= _bit; \ 2375 else \ 2376 t->_var &= ~_bit; \ 2377 \ 2378 return c; \ 2379 } 2380 2381 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning, 2382 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2383 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning, 2384 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2385 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR); 2386 2387 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline, 2388 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2389 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline, 2390 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2391 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR); 2392 2393 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent, 2394 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2395 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent, 2396 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2397 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO); 2398 2399 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable, 2400 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2401 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable, 2402 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2403 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR); 2404 2405 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby, 2406 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2407 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby, 2408 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2409 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR); 2410 2411 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized, 2412 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2413 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized, 2414 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2415 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR); 2416 2417 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized, 2418 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2419 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized, 2420 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2421 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR); 2422 2423 /* 2424 * alua_write_metadata 2425 */ 2426 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2427 struct t10_alua_tg_pt_gp *tg_pt_gp, 2428 char *page) 2429 { 2430 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2431 } 2432 2433 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2434 struct t10_alua_tg_pt_gp *tg_pt_gp, 2435 const char *page, 2436 size_t count) 2437 { 2438 unsigned long tmp; 2439 int ret; 2440 2441 ret = kstrtoul(page, 0, &tmp); 2442 if (ret < 0) { 2443 pr_err("Unable to extract alua_write_metadata\n"); 2444 return ret; 2445 } 2446 2447 if ((tmp != 0) && (tmp != 1)) { 2448 pr_err("Illegal value for alua_write_metadata:" 2449 " %lu\n", tmp); 2450 return -EINVAL; 2451 } 2452 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2453 2454 return count; 2455 } 2456 2457 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2458 2459 2460 2461 /* 2462 * nonop_delay_msecs 2463 */ 2464 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2465 struct t10_alua_tg_pt_gp *tg_pt_gp, 2466 char *page) 2467 { 2468 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2469 2470 } 2471 2472 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2473 struct t10_alua_tg_pt_gp *tg_pt_gp, 2474 const char *page, 2475 size_t count) 2476 { 2477 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2478 } 2479 2480 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2481 2482 /* 2483 * trans_delay_msecs 2484 */ 2485 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2486 struct t10_alua_tg_pt_gp *tg_pt_gp, 2487 char *page) 2488 { 2489 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2490 } 2491 2492 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2493 struct t10_alua_tg_pt_gp *tg_pt_gp, 2494 const char *page, 2495 size_t count) 2496 { 2497 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2498 } 2499 2500 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2501 2502 /* 2503 * implicit_trans_secs 2504 */ 2505 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs( 2506 struct t10_alua_tg_pt_gp *tg_pt_gp, 2507 char *page) 2508 { 2509 return core_alua_show_implicit_trans_secs(tg_pt_gp, page); 2510 } 2511 2512 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs( 2513 struct t10_alua_tg_pt_gp *tg_pt_gp, 2514 const char *page, 2515 size_t count) 2516 { 2517 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count); 2518 } 2519 2520 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR); 2521 2522 /* 2523 * preferred 2524 */ 2525 2526 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2527 struct t10_alua_tg_pt_gp *tg_pt_gp, 2528 char *page) 2529 { 2530 return core_alua_show_preferred_bit(tg_pt_gp, page); 2531 } 2532 2533 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2534 struct t10_alua_tg_pt_gp *tg_pt_gp, 2535 const char *page, 2536 size_t count) 2537 { 2538 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2539 } 2540 2541 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2542 2543 /* 2544 * tg_pt_gp_id 2545 */ 2546 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2547 struct t10_alua_tg_pt_gp *tg_pt_gp, 2548 char *page) 2549 { 2550 if (!tg_pt_gp->tg_pt_gp_valid_id) 2551 return 0; 2552 2553 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2554 } 2555 2556 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2557 struct t10_alua_tg_pt_gp *tg_pt_gp, 2558 const char *page, 2559 size_t count) 2560 { 2561 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2562 unsigned long tg_pt_gp_id; 2563 int ret; 2564 2565 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2566 if (ret < 0) { 2567 pr_err("kstrtoul() returned %d for" 2568 " tg_pt_gp_id\n", ret); 2569 return ret; 2570 } 2571 if (tg_pt_gp_id > 0x0000ffff) { 2572 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2573 " 0x0000ffff\n", tg_pt_gp_id); 2574 return -EINVAL; 2575 } 2576 2577 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2578 if (ret < 0) 2579 return -EINVAL; 2580 2581 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2582 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2583 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2584 tg_pt_gp->tg_pt_gp_id); 2585 2586 return count; 2587 } 2588 2589 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2590 2591 /* 2592 * members 2593 */ 2594 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2595 struct t10_alua_tg_pt_gp *tg_pt_gp, 2596 char *page) 2597 { 2598 struct se_port *port; 2599 struct se_portal_group *tpg; 2600 struct se_lun *lun; 2601 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2602 ssize_t len = 0, cur_len; 2603 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2604 2605 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2606 2607 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2608 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2609 tg_pt_gp_mem_list) { 2610 port = tg_pt_gp_mem->tg_pt; 2611 tpg = port->sep_tpg; 2612 lun = port->sep_lun; 2613 2614 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2615 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2616 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2617 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2618 config_item_name(&lun->lun_group.cg_item)); 2619 cur_len++; /* Extra byte for NULL terminator */ 2620 2621 if ((cur_len + len) > PAGE_SIZE) { 2622 pr_warn("Ran out of lu_gp_show_attr" 2623 "_members buffer\n"); 2624 break; 2625 } 2626 memcpy(page+len, buf, cur_len); 2627 len += cur_len; 2628 } 2629 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2630 2631 return len; 2632 } 2633 2634 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2635 2636 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2637 tg_pt_gp_group); 2638 2639 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2640 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2641 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2642 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2643 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr, 2644 &target_core_alua_tg_pt_gp_alua_support_offline.attr, 2645 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr, 2646 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr, 2647 &target_core_alua_tg_pt_gp_alua_support_standby.attr, 2648 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr, 2649 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr, 2650 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2651 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2652 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2653 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr, 2654 &target_core_alua_tg_pt_gp_preferred.attr, 2655 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2656 &target_core_alua_tg_pt_gp_members.attr, 2657 NULL, 2658 }; 2659 2660 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2661 { 2662 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2663 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2664 2665 core_alua_free_tg_pt_gp(tg_pt_gp); 2666 } 2667 2668 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2669 .release = target_core_alua_tg_pt_gp_release, 2670 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2671 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2672 }; 2673 2674 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2675 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2676 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2677 .ct_owner = THIS_MODULE, 2678 }; 2679 2680 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2681 2682 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2683 2684 static struct config_group *target_core_alua_create_tg_pt_gp( 2685 struct config_group *group, 2686 const char *name) 2687 { 2688 struct t10_alua *alua = container_of(group, struct t10_alua, 2689 alua_tg_pt_gps_group); 2690 struct t10_alua_tg_pt_gp *tg_pt_gp; 2691 struct config_group *alua_tg_pt_gp_cg = NULL; 2692 struct config_item *alua_tg_pt_gp_ci = NULL; 2693 2694 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2695 if (!tg_pt_gp) 2696 return NULL; 2697 2698 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2699 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2700 2701 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2702 &target_core_alua_tg_pt_gp_cit); 2703 2704 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2705 " Group: alua/tg_pt_gps/%s\n", 2706 config_item_name(alua_tg_pt_gp_ci)); 2707 2708 return alua_tg_pt_gp_cg; 2709 } 2710 2711 static void target_core_alua_drop_tg_pt_gp( 2712 struct config_group *group, 2713 struct config_item *item) 2714 { 2715 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2716 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2717 2718 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2719 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2720 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2721 /* 2722 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2723 * -> target_core_alua_tg_pt_gp_release(). 2724 */ 2725 config_item_put(item); 2726 } 2727 2728 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2729 .make_group = &target_core_alua_create_tg_pt_gp, 2730 .drop_item = &target_core_alua_drop_tg_pt_gp, 2731 }; 2732 2733 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2734 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2735 .ct_owner = THIS_MODULE, 2736 }; 2737 2738 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2739 2740 /* Start functions for struct config_item_type target_core_alua_cit */ 2741 2742 /* 2743 * target_core_alua_cit is a ConfigFS group that lives under 2744 * /sys/kernel/config/target/core/alua. There are default groups 2745 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2746 * target_core_alua_cit in target_core_init_configfs() below. 2747 */ 2748 static struct config_item_type target_core_alua_cit = { 2749 .ct_item_ops = NULL, 2750 .ct_attrs = NULL, 2751 .ct_owner = THIS_MODULE, 2752 }; 2753 2754 /* End functions for struct config_item_type target_core_alua_cit */ 2755 2756 /* Start functions for struct config_item_type target_core_stat_cit */ 2757 2758 static struct config_group *target_core_stat_mkdir( 2759 struct config_group *group, 2760 const char *name) 2761 { 2762 return ERR_PTR(-ENOSYS); 2763 } 2764 2765 static void target_core_stat_rmdir( 2766 struct config_group *group, 2767 struct config_item *item) 2768 { 2769 return; 2770 } 2771 2772 static struct configfs_group_operations target_core_stat_group_ops = { 2773 .make_group = &target_core_stat_mkdir, 2774 .drop_item = &target_core_stat_rmdir, 2775 }; 2776 2777 static struct config_item_type target_core_stat_cit = { 2778 .ct_group_ops = &target_core_stat_group_ops, 2779 .ct_owner = THIS_MODULE, 2780 }; 2781 2782 /* End functions for struct config_item_type target_core_stat_cit */ 2783 2784 /* Start functions for struct config_item_type target_core_hba_cit */ 2785 2786 static struct config_group *target_core_make_subdev( 2787 struct config_group *group, 2788 const char *name) 2789 { 2790 struct t10_alua_tg_pt_gp *tg_pt_gp; 2791 struct se_subsystem_api *t; 2792 struct config_item *hba_ci = &group->cg_item; 2793 struct se_hba *hba = item_to_hba(hba_ci); 2794 struct se_device *dev; 2795 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2796 struct config_group *dev_stat_grp = NULL; 2797 int errno = -ENOMEM, ret; 2798 2799 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2800 if (ret) 2801 return ERR_PTR(ret); 2802 /* 2803 * Locate the struct se_subsystem_api from parent's struct se_hba. 2804 */ 2805 t = hba->transport; 2806 2807 dev = target_alloc_device(hba, name); 2808 if (!dev) 2809 goto out_unlock; 2810 2811 dev_cg = &dev->dev_group; 2812 2813 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2814 GFP_KERNEL); 2815 if (!dev_cg->default_groups) 2816 goto out_free_device; 2817 2818 config_group_init_type_name(dev_cg, name, &target_core_dev_cit); 2819 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2820 &target_core_dev_attrib_cit); 2821 config_group_init_type_name(&dev->dev_pr_group, "pr", 2822 &target_core_dev_pr_cit); 2823 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2824 &target_core_dev_wwn_cit); 2825 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2826 "alua", &target_core_alua_tg_pt_gps_cit); 2827 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2828 "statistics", &target_core_stat_cit); 2829 2830 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2831 dev_cg->default_groups[1] = &dev->dev_pr_group; 2832 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2833 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2834 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2835 dev_cg->default_groups[5] = NULL; 2836 /* 2837 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2838 */ 2839 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2840 if (!tg_pt_gp) 2841 goto out_free_dev_cg_default_groups; 2842 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2843 2844 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2845 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2846 GFP_KERNEL); 2847 if (!tg_pt_gp_cg->default_groups) { 2848 pr_err("Unable to allocate tg_pt_gp_cg->" 2849 "default_groups\n"); 2850 goto out_free_tg_pt_gp; 2851 } 2852 2853 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2854 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2855 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2856 tg_pt_gp_cg->default_groups[1] = NULL; 2857 /* 2858 * Add core/$HBA/$DEV/statistics/ default groups 2859 */ 2860 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2861 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2862 GFP_KERNEL); 2863 if (!dev_stat_grp->default_groups) { 2864 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2865 goto out_free_tg_pt_gp_cg_default_groups; 2866 } 2867 target_stat_setup_dev_default_groups(dev); 2868 2869 mutex_unlock(&hba->hba_access_mutex); 2870 return dev_cg; 2871 2872 out_free_tg_pt_gp_cg_default_groups: 2873 kfree(tg_pt_gp_cg->default_groups); 2874 out_free_tg_pt_gp: 2875 core_alua_free_tg_pt_gp(tg_pt_gp); 2876 out_free_dev_cg_default_groups: 2877 kfree(dev_cg->default_groups); 2878 out_free_device: 2879 target_free_device(dev); 2880 out_unlock: 2881 mutex_unlock(&hba->hba_access_mutex); 2882 return ERR_PTR(errno); 2883 } 2884 2885 static void target_core_drop_subdev( 2886 struct config_group *group, 2887 struct config_item *item) 2888 { 2889 struct config_group *dev_cg = to_config_group(item); 2890 struct se_device *dev = 2891 container_of(dev_cg, struct se_device, dev_group); 2892 struct se_hba *hba; 2893 struct config_item *df_item; 2894 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2895 int i; 2896 2897 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2898 2899 mutex_lock(&hba->hba_access_mutex); 2900 2901 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2902 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2903 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2904 dev_stat_grp->default_groups[i] = NULL; 2905 config_item_put(df_item); 2906 } 2907 kfree(dev_stat_grp->default_groups); 2908 2909 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2910 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2911 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2912 tg_pt_gp_cg->default_groups[i] = NULL; 2913 config_item_put(df_item); 2914 } 2915 kfree(tg_pt_gp_cg->default_groups); 2916 /* 2917 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2918 * directly from target_core_alua_tg_pt_gp_release(). 2919 */ 2920 dev->t10_alua.default_tg_pt_gp = NULL; 2921 2922 for (i = 0; dev_cg->default_groups[i]; i++) { 2923 df_item = &dev_cg->default_groups[i]->cg_item; 2924 dev_cg->default_groups[i] = NULL; 2925 config_item_put(df_item); 2926 } 2927 /* 2928 * se_dev is released from target_core_dev_item_ops->release() 2929 */ 2930 config_item_put(item); 2931 mutex_unlock(&hba->hba_access_mutex); 2932 } 2933 2934 static struct configfs_group_operations target_core_hba_group_ops = { 2935 .make_group = target_core_make_subdev, 2936 .drop_item = target_core_drop_subdev, 2937 }; 2938 2939 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2940 #define SE_HBA_ATTR(_name, _mode) \ 2941 static struct target_core_hba_attribute \ 2942 target_core_hba_##_name = \ 2943 __CONFIGFS_EATTR(_name, _mode, \ 2944 target_core_hba_show_attr_##_name, \ 2945 target_core_hba_store_attr_##_name); 2946 2947 #define SE_HBA_ATTR_RO(_name) \ 2948 static struct target_core_hba_attribute \ 2949 target_core_hba_##_name = \ 2950 __CONFIGFS_EATTR_RO(_name, \ 2951 target_core_hba_show_attr_##_name); 2952 2953 static ssize_t target_core_hba_show_attr_hba_info( 2954 struct se_hba *hba, 2955 char *page) 2956 { 2957 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2958 hba->hba_id, hba->transport->name, 2959 TARGET_CORE_CONFIGFS_VERSION); 2960 } 2961 2962 SE_HBA_ATTR_RO(hba_info); 2963 2964 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2965 char *page) 2966 { 2967 int hba_mode = 0; 2968 2969 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2970 hba_mode = 1; 2971 2972 return sprintf(page, "%d\n", hba_mode); 2973 } 2974 2975 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2976 const char *page, size_t count) 2977 { 2978 struct se_subsystem_api *transport = hba->transport; 2979 unsigned long mode_flag; 2980 int ret; 2981 2982 if (transport->pmode_enable_hba == NULL) 2983 return -EINVAL; 2984 2985 ret = kstrtoul(page, 0, &mode_flag); 2986 if (ret < 0) { 2987 pr_err("Unable to extract hba mode flag: %d\n", ret); 2988 return ret; 2989 } 2990 2991 if (hba->dev_count) { 2992 pr_err("Unable to set hba_mode with active devices\n"); 2993 return -EINVAL; 2994 } 2995 2996 ret = transport->pmode_enable_hba(hba, mode_flag); 2997 if (ret < 0) 2998 return -EINVAL; 2999 if (ret > 0) 3000 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3001 else if (ret == 0) 3002 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3003 3004 return count; 3005 } 3006 3007 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 3008 3009 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 3010 3011 static void target_core_hba_release(struct config_item *item) 3012 { 3013 struct se_hba *hba = container_of(to_config_group(item), 3014 struct se_hba, hba_group); 3015 core_delete_hba(hba); 3016 } 3017 3018 static struct configfs_attribute *target_core_hba_attrs[] = { 3019 &target_core_hba_hba_info.attr, 3020 &target_core_hba_hba_mode.attr, 3021 NULL, 3022 }; 3023 3024 static struct configfs_item_operations target_core_hba_item_ops = { 3025 .release = target_core_hba_release, 3026 .show_attribute = target_core_hba_attr_show, 3027 .store_attribute = target_core_hba_attr_store, 3028 }; 3029 3030 static struct config_item_type target_core_hba_cit = { 3031 .ct_item_ops = &target_core_hba_item_ops, 3032 .ct_group_ops = &target_core_hba_group_ops, 3033 .ct_attrs = target_core_hba_attrs, 3034 .ct_owner = THIS_MODULE, 3035 }; 3036 3037 static struct config_group *target_core_call_addhbatotarget( 3038 struct config_group *group, 3039 const char *name) 3040 { 3041 char *se_plugin_str, *str, *str2; 3042 struct se_hba *hba; 3043 char buf[TARGET_CORE_NAME_MAX_LEN]; 3044 unsigned long plugin_dep_id = 0; 3045 int ret; 3046 3047 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3048 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3049 pr_err("Passed *name strlen(): %d exceeds" 3050 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3051 TARGET_CORE_NAME_MAX_LEN); 3052 return ERR_PTR(-ENAMETOOLONG); 3053 } 3054 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3055 3056 str = strstr(buf, "_"); 3057 if (!str) { 3058 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3059 return ERR_PTR(-EINVAL); 3060 } 3061 se_plugin_str = buf; 3062 /* 3063 * Special case for subsystem plugins that have "_" in their names. 3064 * Namely rd_direct and rd_mcp.. 3065 */ 3066 str2 = strstr(str+1, "_"); 3067 if (str2) { 3068 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3069 str2++; /* Skip to start of plugin dependent ID */ 3070 str = str2; 3071 } else { 3072 *str = '\0'; /* Terminate for *se_plugin_str */ 3073 str++; /* Skip to start of plugin dependent ID */ 3074 } 3075 3076 ret = kstrtoul(str, 0, &plugin_dep_id); 3077 if (ret < 0) { 3078 pr_err("kstrtoul() returned %d for" 3079 " plugin_dep_id\n", ret); 3080 return ERR_PTR(ret); 3081 } 3082 /* 3083 * Load up TCM subsystem plugins if they have not already been loaded. 3084 */ 3085 transport_subsystem_check_init(); 3086 3087 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3088 if (IS_ERR(hba)) 3089 return ERR_CAST(hba); 3090 3091 config_group_init_type_name(&hba->hba_group, name, 3092 &target_core_hba_cit); 3093 3094 return &hba->hba_group; 3095 } 3096 3097 static void target_core_call_delhbafromtarget( 3098 struct config_group *group, 3099 struct config_item *item) 3100 { 3101 /* 3102 * core_delete_hba() is called from target_core_hba_item_ops->release() 3103 * -> target_core_hba_release() 3104 */ 3105 config_item_put(item); 3106 } 3107 3108 static struct configfs_group_operations target_core_group_ops = { 3109 .make_group = target_core_call_addhbatotarget, 3110 .drop_item = target_core_call_delhbafromtarget, 3111 }; 3112 3113 static struct config_item_type target_core_cit = { 3114 .ct_item_ops = NULL, 3115 .ct_group_ops = &target_core_group_ops, 3116 .ct_attrs = NULL, 3117 .ct_owner = THIS_MODULE, 3118 }; 3119 3120 /* Stop functions for struct config_item_type target_core_hba_cit */ 3121 3122 static int __init target_core_init_configfs(void) 3123 { 3124 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3125 struct config_group *lu_gp_cg = NULL; 3126 struct configfs_subsystem *subsys; 3127 struct t10_alua_lu_gp *lu_gp; 3128 int ret; 3129 3130 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3131 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3132 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3133 3134 subsys = target_core_subsystem[0]; 3135 config_group_init(&subsys->su_group); 3136 mutex_init(&subsys->su_mutex); 3137 3138 ret = init_se_kmem_caches(); 3139 if (ret < 0) 3140 return ret; 3141 /* 3142 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3143 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3144 */ 3145 target_cg = &subsys->su_group; 3146 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3147 GFP_KERNEL); 3148 if (!target_cg->default_groups) { 3149 pr_err("Unable to allocate target_cg->default_groups\n"); 3150 ret = -ENOMEM; 3151 goto out_global; 3152 } 3153 3154 config_group_init_type_name(&target_core_hbagroup, 3155 "core", &target_core_cit); 3156 target_cg->default_groups[0] = &target_core_hbagroup; 3157 target_cg->default_groups[1] = NULL; 3158 /* 3159 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3160 */ 3161 hba_cg = &target_core_hbagroup; 3162 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3163 GFP_KERNEL); 3164 if (!hba_cg->default_groups) { 3165 pr_err("Unable to allocate hba_cg->default_groups\n"); 3166 ret = -ENOMEM; 3167 goto out_global; 3168 } 3169 config_group_init_type_name(&alua_group, 3170 "alua", &target_core_alua_cit); 3171 hba_cg->default_groups[0] = &alua_group; 3172 hba_cg->default_groups[1] = NULL; 3173 /* 3174 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3175 * groups under /sys/kernel/config/target/core/alua/ 3176 */ 3177 alua_cg = &alua_group; 3178 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3179 GFP_KERNEL); 3180 if (!alua_cg->default_groups) { 3181 pr_err("Unable to allocate alua_cg->default_groups\n"); 3182 ret = -ENOMEM; 3183 goto out_global; 3184 } 3185 3186 config_group_init_type_name(&alua_lu_gps_group, 3187 "lu_gps", &target_core_alua_lu_gps_cit); 3188 alua_cg->default_groups[0] = &alua_lu_gps_group; 3189 alua_cg->default_groups[1] = NULL; 3190 /* 3191 * Add core/alua/lu_gps/default_lu_gp 3192 */ 3193 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3194 if (IS_ERR(lu_gp)) { 3195 ret = -ENOMEM; 3196 goto out_global; 3197 } 3198 3199 lu_gp_cg = &alua_lu_gps_group; 3200 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3201 GFP_KERNEL); 3202 if (!lu_gp_cg->default_groups) { 3203 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3204 ret = -ENOMEM; 3205 goto out_global; 3206 } 3207 3208 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3209 &target_core_alua_lu_gp_cit); 3210 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3211 lu_gp_cg->default_groups[1] = NULL; 3212 default_lu_gp = lu_gp; 3213 /* 3214 * Register the target_core_mod subsystem with configfs. 3215 */ 3216 ret = configfs_register_subsystem(subsys); 3217 if (ret < 0) { 3218 pr_err("Error %d while registering subsystem %s\n", 3219 ret, subsys->su_group.cg_item.ci_namebuf); 3220 goto out_global; 3221 } 3222 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3223 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3224 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3225 /* 3226 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3227 */ 3228 ret = rd_module_init(); 3229 if (ret < 0) 3230 goto out; 3231 3232 ret = core_dev_setup_virtual_lun0(); 3233 if (ret < 0) 3234 goto out; 3235 3236 ret = target_xcopy_setup_pt(); 3237 if (ret < 0) 3238 goto out; 3239 3240 return 0; 3241 3242 out: 3243 configfs_unregister_subsystem(subsys); 3244 core_dev_release_virtual_lun0(); 3245 rd_module_exit(); 3246 out_global: 3247 if (default_lu_gp) { 3248 core_alua_free_lu_gp(default_lu_gp); 3249 default_lu_gp = NULL; 3250 } 3251 if (lu_gp_cg) 3252 kfree(lu_gp_cg->default_groups); 3253 if (alua_cg) 3254 kfree(alua_cg->default_groups); 3255 if (hba_cg) 3256 kfree(hba_cg->default_groups); 3257 kfree(target_cg->default_groups); 3258 release_se_kmem_caches(); 3259 return ret; 3260 } 3261 3262 static void __exit target_core_exit_configfs(void) 3263 { 3264 struct configfs_subsystem *subsys; 3265 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3266 struct config_item *item; 3267 int i; 3268 3269 subsys = target_core_subsystem[0]; 3270 3271 lu_gp_cg = &alua_lu_gps_group; 3272 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3273 item = &lu_gp_cg->default_groups[i]->cg_item; 3274 lu_gp_cg->default_groups[i] = NULL; 3275 config_item_put(item); 3276 } 3277 kfree(lu_gp_cg->default_groups); 3278 lu_gp_cg->default_groups = NULL; 3279 3280 alua_cg = &alua_group; 3281 for (i = 0; alua_cg->default_groups[i]; i++) { 3282 item = &alua_cg->default_groups[i]->cg_item; 3283 alua_cg->default_groups[i] = NULL; 3284 config_item_put(item); 3285 } 3286 kfree(alua_cg->default_groups); 3287 alua_cg->default_groups = NULL; 3288 3289 hba_cg = &target_core_hbagroup; 3290 for (i = 0; hba_cg->default_groups[i]; i++) { 3291 item = &hba_cg->default_groups[i]->cg_item; 3292 hba_cg->default_groups[i] = NULL; 3293 config_item_put(item); 3294 } 3295 kfree(hba_cg->default_groups); 3296 hba_cg->default_groups = NULL; 3297 /* 3298 * We expect subsys->su_group.default_groups to be released 3299 * by configfs subsystem provider logic.. 3300 */ 3301 configfs_unregister_subsystem(subsys); 3302 kfree(subsys->su_group.default_groups); 3303 3304 core_alua_free_lu_gp(default_lu_gp); 3305 default_lu_gp = NULL; 3306 3307 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3308 " Infrastructure\n"); 3309 3310 core_dev_release_virtual_lun0(); 3311 rd_module_exit(); 3312 target_xcopy_release_pt(); 3313 release_se_kmem_caches(); 3314 } 3315 3316 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3317 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3318 MODULE_LICENSE("GPL"); 3319 3320 module_init(target_core_init_configfs); 3321 module_exit(target_core_exit_configfs); 3322