1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2012 RisingTide Systems LLC. 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 52 extern struct t10_alua_lu_gp *default_lu_gp; 53 54 static LIST_HEAD(g_tf_list); 55 static DEFINE_MUTEX(g_tf_lock); 56 57 struct target_core_configfs_attribute { 58 struct configfs_attribute attr; 59 ssize_t (*show)(void *, char *); 60 ssize_t (*store)(void *, const char *, size_t); 61 }; 62 63 static struct config_group target_core_hbagroup; 64 static struct config_group alua_group; 65 static struct config_group alua_lu_gps_group; 66 67 static inline struct se_hba * 68 item_to_hba(struct config_item *item) 69 { 70 return container_of(to_config_group(item), struct se_hba, hba_group); 71 } 72 73 /* 74 * Attributes for /sys/kernel/config/target/ 75 */ 76 static ssize_t target_core_attr_show(struct config_item *item, 77 struct configfs_attribute *attr, 78 char *page) 79 { 80 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 81 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 82 utsname()->sysname, utsname()->machine); 83 } 84 85 static struct configfs_item_operations target_core_fabric_item_ops = { 86 .show_attribute = target_core_attr_show, 87 }; 88 89 static struct configfs_attribute target_core_item_attr_version = { 90 .ca_owner = THIS_MODULE, 91 .ca_name = "version", 92 .ca_mode = S_IRUGO, 93 }; 94 95 static struct target_fabric_configfs *target_core_get_fabric( 96 const char *name) 97 { 98 struct target_fabric_configfs *tf; 99 100 if (!name) 101 return NULL; 102 103 mutex_lock(&g_tf_lock); 104 list_for_each_entry(tf, &g_tf_list, tf_list) { 105 if (!strcmp(tf->tf_name, name)) { 106 atomic_inc(&tf->tf_access_cnt); 107 mutex_unlock(&g_tf_lock); 108 return tf; 109 } 110 } 111 mutex_unlock(&g_tf_lock); 112 113 return NULL; 114 } 115 116 /* 117 * Called from struct target_core_group_ops->make_group() 118 */ 119 static struct config_group *target_core_register_fabric( 120 struct config_group *group, 121 const char *name) 122 { 123 struct target_fabric_configfs *tf; 124 int ret; 125 126 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 127 " %s\n", group, name); 128 /* 129 * Below are some hardcoded request_module() calls to automatically 130 * local fabric modules when the following is called: 131 * 132 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 133 * 134 * Note that this does not limit which TCM fabric module can be 135 * registered, but simply provids auto loading logic for modules with 136 * mkdir(2) system calls with known TCM fabric modules. 137 */ 138 if (!strncmp(name, "iscsi", 5)) { 139 /* 140 * Automatically load the LIO Target fabric module when the 141 * following is called: 142 * 143 * mkdir -p $CONFIGFS/target/iscsi 144 */ 145 ret = request_module("iscsi_target_mod"); 146 if (ret < 0) { 147 pr_err("request_module() failed for" 148 " iscsi_target_mod.ko: %d\n", ret); 149 return ERR_PTR(-EINVAL); 150 } 151 } else if (!strncmp(name, "loopback", 8)) { 152 /* 153 * Automatically load the tcm_loop fabric module when the 154 * following is called: 155 * 156 * mkdir -p $CONFIGFS/target/loopback 157 */ 158 ret = request_module("tcm_loop"); 159 if (ret < 0) { 160 pr_err("request_module() failed for" 161 " tcm_loop.ko: %d\n", ret); 162 return ERR_PTR(-EINVAL); 163 } 164 } 165 166 tf = target_core_get_fabric(name); 167 if (!tf) { 168 pr_err("target_core_get_fabric() failed for %s\n", 169 name); 170 return ERR_PTR(-EINVAL); 171 } 172 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 173 " %s\n", tf->tf_name); 174 /* 175 * On a successful target_core_get_fabric() look, the returned 176 * struct target_fabric_configfs *tf will contain a usage reference. 177 */ 178 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 179 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 180 181 tf->tf_group.default_groups = tf->tf_default_groups; 182 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 183 tf->tf_group.default_groups[1] = NULL; 184 185 config_group_init_type_name(&tf->tf_group, name, 186 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 187 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 188 &TF_CIT_TMPL(tf)->tfc_discovery_cit); 189 190 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 191 " %s\n", tf->tf_group.cg_item.ci_name); 192 /* 193 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 194 */ 195 tf->tf_ops.tf_subsys = tf->tf_subsys; 196 tf->tf_fabric = &tf->tf_group.cg_item; 197 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 198 " for %s\n", name); 199 200 return &tf->tf_group; 201 } 202 203 /* 204 * Called from struct target_core_group_ops->drop_item() 205 */ 206 static void target_core_deregister_fabric( 207 struct config_group *group, 208 struct config_item *item) 209 { 210 struct target_fabric_configfs *tf = container_of( 211 to_config_group(item), struct target_fabric_configfs, tf_group); 212 struct config_group *tf_group; 213 struct config_item *df_item; 214 int i; 215 216 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 217 " tf list\n", config_item_name(item)); 218 219 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 220 " %s\n", tf->tf_name); 221 atomic_dec(&tf->tf_access_cnt); 222 223 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 224 " tf->tf_fabric for %s\n", tf->tf_name); 225 tf->tf_fabric = NULL; 226 227 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 228 " %s\n", config_item_name(item)); 229 230 tf_group = &tf->tf_group; 231 for (i = 0; tf_group->default_groups[i]; i++) { 232 df_item = &tf_group->default_groups[i]->cg_item; 233 tf_group->default_groups[i] = NULL; 234 config_item_put(df_item); 235 } 236 config_item_put(item); 237 } 238 239 static struct configfs_group_operations target_core_fabric_group_ops = { 240 .make_group = &target_core_register_fabric, 241 .drop_item = &target_core_deregister_fabric, 242 }; 243 244 /* 245 * All item attributes appearing in /sys/kernel/target/ appear here. 246 */ 247 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 248 &target_core_item_attr_version, 249 NULL, 250 }; 251 252 /* 253 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 254 */ 255 static struct config_item_type target_core_fabrics_item = { 256 .ct_item_ops = &target_core_fabric_item_ops, 257 .ct_group_ops = &target_core_fabric_group_ops, 258 .ct_attrs = target_core_fabric_item_attrs, 259 .ct_owner = THIS_MODULE, 260 }; 261 262 static struct configfs_subsystem target_core_fabrics = { 263 .su_group = { 264 .cg_item = { 265 .ci_namebuf = "target", 266 .ci_type = &target_core_fabrics_item, 267 }, 268 }, 269 }; 270 271 static struct configfs_subsystem *target_core_subsystem[] = { 272 &target_core_fabrics, 273 NULL, 274 }; 275 276 /*############################################################################## 277 // Start functions called by external Target Fabrics Modules 278 //############################################################################*/ 279 280 /* 281 * First function called by fabric modules to: 282 * 283 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 284 * 2) Add struct target_fabric_configfs to g_tf_list 285 * 3) Return struct target_fabric_configfs to fabric module to be passed 286 * into target_fabric_configfs_register(). 287 */ 288 struct target_fabric_configfs *target_fabric_configfs_init( 289 struct module *fabric_mod, 290 const char *name) 291 { 292 struct target_fabric_configfs *tf; 293 294 if (!(name)) { 295 pr_err("Unable to locate passed fabric name\n"); 296 return ERR_PTR(-EINVAL); 297 } 298 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 299 pr_err("Passed name: %s exceeds TARGET_FABRIC" 300 "_NAME_SIZE\n", name); 301 return ERR_PTR(-EINVAL); 302 } 303 304 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 305 if (!tf) 306 return ERR_PTR(-ENOMEM); 307 308 INIT_LIST_HEAD(&tf->tf_list); 309 atomic_set(&tf->tf_access_cnt, 0); 310 /* 311 * Setup the default generic struct config_item_type's (cits) in 312 * struct target_fabric_configfs->tf_cit_tmpl 313 */ 314 tf->tf_module = fabric_mod; 315 target_fabric_setup_cits(tf); 316 317 tf->tf_subsys = target_core_subsystem[0]; 318 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 319 320 mutex_lock(&g_tf_lock); 321 list_add_tail(&tf->tf_list, &g_tf_list); 322 mutex_unlock(&g_tf_lock); 323 324 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 325 ">>>>>>>>>>>>>>\n"); 326 pr_debug("Initialized struct target_fabric_configfs: %p for" 327 " %s\n", tf, tf->tf_name); 328 return tf; 329 } 330 EXPORT_SYMBOL(target_fabric_configfs_init); 331 332 /* 333 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 334 */ 335 void target_fabric_configfs_free( 336 struct target_fabric_configfs *tf) 337 { 338 mutex_lock(&g_tf_lock); 339 list_del(&tf->tf_list); 340 mutex_unlock(&g_tf_lock); 341 342 kfree(tf); 343 } 344 EXPORT_SYMBOL(target_fabric_configfs_free); 345 346 /* 347 * Perform a sanity check of the passed tf->tf_ops before completing 348 * TCM fabric module registration. 349 */ 350 static int target_fabric_tf_ops_check( 351 struct target_fabric_configfs *tf) 352 { 353 struct target_core_fabric_ops *tfo = &tf->tf_ops; 354 355 if (!tfo->get_fabric_name) { 356 pr_err("Missing tfo->get_fabric_name()\n"); 357 return -EINVAL; 358 } 359 if (!tfo->get_fabric_proto_ident) { 360 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 361 return -EINVAL; 362 } 363 if (!tfo->tpg_get_wwn) { 364 pr_err("Missing tfo->tpg_get_wwn()\n"); 365 return -EINVAL; 366 } 367 if (!tfo->tpg_get_tag) { 368 pr_err("Missing tfo->tpg_get_tag()\n"); 369 return -EINVAL; 370 } 371 if (!tfo->tpg_get_default_depth) { 372 pr_err("Missing tfo->tpg_get_default_depth()\n"); 373 return -EINVAL; 374 } 375 if (!tfo->tpg_get_pr_transport_id) { 376 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 377 return -EINVAL; 378 } 379 if (!tfo->tpg_get_pr_transport_id_len) { 380 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 381 return -EINVAL; 382 } 383 if (!tfo->tpg_check_demo_mode) { 384 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 385 return -EINVAL; 386 } 387 if (!tfo->tpg_check_demo_mode_cache) { 388 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 389 return -EINVAL; 390 } 391 if (!tfo->tpg_check_demo_mode_write_protect) { 392 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 393 return -EINVAL; 394 } 395 if (!tfo->tpg_check_prod_mode_write_protect) { 396 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 397 return -EINVAL; 398 } 399 if (!tfo->tpg_alloc_fabric_acl) { 400 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 401 return -EINVAL; 402 } 403 if (!tfo->tpg_release_fabric_acl) { 404 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 405 return -EINVAL; 406 } 407 if (!tfo->tpg_get_inst_index) { 408 pr_err("Missing tfo->tpg_get_inst_index()\n"); 409 return -EINVAL; 410 } 411 if (!tfo->release_cmd) { 412 pr_err("Missing tfo->release_cmd()\n"); 413 return -EINVAL; 414 } 415 if (!tfo->shutdown_session) { 416 pr_err("Missing tfo->shutdown_session()\n"); 417 return -EINVAL; 418 } 419 if (!tfo->close_session) { 420 pr_err("Missing tfo->close_session()\n"); 421 return -EINVAL; 422 } 423 if (!tfo->sess_get_index) { 424 pr_err("Missing tfo->sess_get_index()\n"); 425 return -EINVAL; 426 } 427 if (!tfo->write_pending) { 428 pr_err("Missing tfo->write_pending()\n"); 429 return -EINVAL; 430 } 431 if (!tfo->write_pending_status) { 432 pr_err("Missing tfo->write_pending_status()\n"); 433 return -EINVAL; 434 } 435 if (!tfo->set_default_node_attributes) { 436 pr_err("Missing tfo->set_default_node_attributes()\n"); 437 return -EINVAL; 438 } 439 if (!tfo->get_task_tag) { 440 pr_err("Missing tfo->get_task_tag()\n"); 441 return -EINVAL; 442 } 443 if (!tfo->get_cmd_state) { 444 pr_err("Missing tfo->get_cmd_state()\n"); 445 return -EINVAL; 446 } 447 if (!tfo->queue_data_in) { 448 pr_err("Missing tfo->queue_data_in()\n"); 449 return -EINVAL; 450 } 451 if (!tfo->queue_status) { 452 pr_err("Missing tfo->queue_status()\n"); 453 return -EINVAL; 454 } 455 if (!tfo->queue_tm_rsp) { 456 pr_err("Missing tfo->queue_tm_rsp()\n"); 457 return -EINVAL; 458 } 459 /* 460 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 461 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 462 * target_core_fabric_configfs.c WWN+TPG group context code. 463 */ 464 if (!tfo->fabric_make_wwn) { 465 pr_err("Missing tfo->fabric_make_wwn()\n"); 466 return -EINVAL; 467 } 468 if (!tfo->fabric_drop_wwn) { 469 pr_err("Missing tfo->fabric_drop_wwn()\n"); 470 return -EINVAL; 471 } 472 if (!tfo->fabric_make_tpg) { 473 pr_err("Missing tfo->fabric_make_tpg()\n"); 474 return -EINVAL; 475 } 476 if (!tfo->fabric_drop_tpg) { 477 pr_err("Missing tfo->fabric_drop_tpg()\n"); 478 return -EINVAL; 479 } 480 481 return 0; 482 } 483 484 /* 485 * Called 2nd from fabric module with returned parameter of 486 * struct target_fabric_configfs * from target_fabric_configfs_init(). 487 * 488 * Upon a successful registration, the new fabric's struct config_item is 489 * return. Also, a pointer to this struct is set in the passed 490 * struct target_fabric_configfs. 491 */ 492 int target_fabric_configfs_register( 493 struct target_fabric_configfs *tf) 494 { 495 int ret; 496 497 if (!tf) { 498 pr_err("Unable to locate target_fabric_configfs" 499 " pointer\n"); 500 return -EINVAL; 501 } 502 if (!tf->tf_subsys) { 503 pr_err("Unable to target struct config_subsystem" 504 " pointer\n"); 505 return -EINVAL; 506 } 507 ret = target_fabric_tf_ops_check(tf); 508 if (ret < 0) 509 return ret; 510 511 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 512 ">>>>>>>>>>\n"); 513 return 0; 514 } 515 EXPORT_SYMBOL(target_fabric_configfs_register); 516 517 void target_fabric_configfs_deregister( 518 struct target_fabric_configfs *tf) 519 { 520 struct configfs_subsystem *su; 521 522 if (!tf) { 523 pr_err("Unable to locate passed target_fabric_" 524 "configfs\n"); 525 return; 526 } 527 su = tf->tf_subsys; 528 if (!su) { 529 pr_err("Unable to locate passed tf->tf_subsys" 530 " pointer\n"); 531 return; 532 } 533 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 534 ">>>>>>>>>>>>\n"); 535 mutex_lock(&g_tf_lock); 536 if (atomic_read(&tf->tf_access_cnt)) { 537 mutex_unlock(&g_tf_lock); 538 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 539 tf->tf_name); 540 BUG(); 541 } 542 list_del(&tf->tf_list); 543 mutex_unlock(&g_tf_lock); 544 545 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 546 " %s\n", tf->tf_name); 547 tf->tf_module = NULL; 548 tf->tf_subsys = NULL; 549 kfree(tf); 550 551 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 552 ">>>>>\n"); 553 } 554 EXPORT_SYMBOL(target_fabric_configfs_deregister); 555 556 /*############################################################################## 557 // Stop functions called by external Target Fabrics Modules 558 //############################################################################*/ 559 560 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 561 562 #define DEF_DEV_ATTRIB_SHOW(_name) \ 563 static ssize_t target_core_dev_show_attr_##_name( \ 564 struct se_dev_attrib *da, \ 565 char *page) \ 566 { \ 567 return snprintf(page, PAGE_SIZE, "%u\n", \ 568 (u32)da->da_dev->dev_attrib._name); \ 569 } 570 571 #define DEF_DEV_ATTRIB_STORE(_name) \ 572 static ssize_t target_core_dev_store_attr_##_name( \ 573 struct se_dev_attrib *da, \ 574 const char *page, \ 575 size_t count) \ 576 { \ 577 unsigned long val; \ 578 int ret; \ 579 \ 580 ret = strict_strtoul(page, 0, &val); \ 581 if (ret < 0) { \ 582 pr_err("strict_strtoul() failed with" \ 583 " ret: %d\n", ret); \ 584 return -EINVAL; \ 585 } \ 586 ret = se_dev_set_##_name(da->da_dev, (u32)val); \ 587 \ 588 return (!ret) ? count : -EINVAL; \ 589 } 590 591 #define DEF_DEV_ATTRIB(_name) \ 592 DEF_DEV_ATTRIB_SHOW(_name); \ 593 DEF_DEV_ATTRIB_STORE(_name); 594 595 #define DEF_DEV_ATTRIB_RO(_name) \ 596 DEF_DEV_ATTRIB_SHOW(_name); 597 598 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 599 #define SE_DEV_ATTR(_name, _mode) \ 600 static struct target_core_dev_attrib_attribute \ 601 target_core_dev_attrib_##_name = \ 602 __CONFIGFS_EATTR(_name, _mode, \ 603 target_core_dev_show_attr_##_name, \ 604 target_core_dev_store_attr_##_name); 605 606 #define SE_DEV_ATTR_RO(_name); \ 607 static struct target_core_dev_attrib_attribute \ 608 target_core_dev_attrib_##_name = \ 609 __CONFIGFS_EATTR_RO(_name, \ 610 target_core_dev_show_attr_##_name); 611 612 DEF_DEV_ATTRIB(emulate_dpo); 613 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 614 615 DEF_DEV_ATTRIB(emulate_fua_write); 616 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 617 618 DEF_DEV_ATTRIB(emulate_fua_read); 619 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 620 621 DEF_DEV_ATTRIB(emulate_write_cache); 622 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 623 624 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 625 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 626 627 DEF_DEV_ATTRIB(emulate_tas); 628 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 629 630 DEF_DEV_ATTRIB(emulate_tpu); 631 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 632 633 DEF_DEV_ATTRIB(emulate_tpws); 634 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 635 636 DEF_DEV_ATTRIB(enforce_pr_isids); 637 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 638 639 DEF_DEV_ATTRIB(is_nonrot); 640 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 641 642 DEF_DEV_ATTRIB(emulate_rest_reord); 643 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 644 645 DEF_DEV_ATTRIB_RO(hw_block_size); 646 SE_DEV_ATTR_RO(hw_block_size); 647 648 DEF_DEV_ATTRIB(block_size); 649 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 650 651 DEF_DEV_ATTRIB_RO(hw_max_sectors); 652 SE_DEV_ATTR_RO(hw_max_sectors); 653 654 DEF_DEV_ATTRIB(fabric_max_sectors); 655 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR); 656 657 DEF_DEV_ATTRIB(optimal_sectors); 658 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 659 660 DEF_DEV_ATTRIB_RO(hw_queue_depth); 661 SE_DEV_ATTR_RO(hw_queue_depth); 662 663 DEF_DEV_ATTRIB(queue_depth); 664 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 665 666 DEF_DEV_ATTRIB(max_unmap_lba_count); 667 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 668 669 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 670 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 671 672 DEF_DEV_ATTRIB(unmap_granularity); 673 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 674 675 DEF_DEV_ATTRIB(unmap_granularity_alignment); 676 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 677 678 DEF_DEV_ATTRIB(max_write_same_len); 679 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR); 680 681 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 682 683 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 684 &target_core_dev_attrib_emulate_dpo.attr, 685 &target_core_dev_attrib_emulate_fua_write.attr, 686 &target_core_dev_attrib_emulate_fua_read.attr, 687 &target_core_dev_attrib_emulate_write_cache.attr, 688 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 689 &target_core_dev_attrib_emulate_tas.attr, 690 &target_core_dev_attrib_emulate_tpu.attr, 691 &target_core_dev_attrib_emulate_tpws.attr, 692 &target_core_dev_attrib_enforce_pr_isids.attr, 693 &target_core_dev_attrib_is_nonrot.attr, 694 &target_core_dev_attrib_emulate_rest_reord.attr, 695 &target_core_dev_attrib_hw_block_size.attr, 696 &target_core_dev_attrib_block_size.attr, 697 &target_core_dev_attrib_hw_max_sectors.attr, 698 &target_core_dev_attrib_fabric_max_sectors.attr, 699 &target_core_dev_attrib_optimal_sectors.attr, 700 &target_core_dev_attrib_hw_queue_depth.attr, 701 &target_core_dev_attrib_queue_depth.attr, 702 &target_core_dev_attrib_max_unmap_lba_count.attr, 703 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 704 &target_core_dev_attrib_unmap_granularity.attr, 705 &target_core_dev_attrib_unmap_granularity_alignment.attr, 706 &target_core_dev_attrib_max_write_same_len.attr, 707 NULL, 708 }; 709 710 static struct configfs_item_operations target_core_dev_attrib_ops = { 711 .show_attribute = target_core_dev_attrib_attr_show, 712 .store_attribute = target_core_dev_attrib_attr_store, 713 }; 714 715 static struct config_item_type target_core_dev_attrib_cit = { 716 .ct_item_ops = &target_core_dev_attrib_ops, 717 .ct_attrs = target_core_dev_attrib_attrs, 718 .ct_owner = THIS_MODULE, 719 }; 720 721 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 722 723 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 724 725 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 726 #define SE_DEV_WWN_ATTR(_name, _mode) \ 727 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 728 __CONFIGFS_EATTR(_name, _mode, \ 729 target_core_dev_wwn_show_attr_##_name, \ 730 target_core_dev_wwn_store_attr_##_name); 731 732 #define SE_DEV_WWN_ATTR_RO(_name); \ 733 do { \ 734 static struct target_core_dev_wwn_attribute \ 735 target_core_dev_wwn_##_name = \ 736 __CONFIGFS_EATTR_RO(_name, \ 737 target_core_dev_wwn_show_attr_##_name); \ 738 } while (0); 739 740 /* 741 * VPD page 0x80 Unit serial 742 */ 743 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 744 struct t10_wwn *t10_wwn, 745 char *page) 746 { 747 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 748 &t10_wwn->unit_serial[0]); 749 } 750 751 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 752 struct t10_wwn *t10_wwn, 753 const char *page, 754 size_t count) 755 { 756 struct se_device *dev = t10_wwn->t10_dev; 757 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 758 759 /* 760 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 761 * from the struct scsi_device level firmware, do not allow 762 * VPD Unit Serial to be emulated. 763 * 764 * Note this struct scsi_device could also be emulating VPD 765 * information from its drivers/scsi LLD. But for now we assume 766 * it is doing 'the right thing' wrt a world wide unique 767 * VPD Unit Serial Number that OS dependent multipath can depend on. 768 */ 769 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 770 pr_err("Underlying SCSI device firmware provided VPD" 771 " Unit Serial, ignoring request\n"); 772 return -EOPNOTSUPP; 773 } 774 775 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 776 pr_err("Emulated VPD Unit Serial exceeds" 777 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 778 return -EOVERFLOW; 779 } 780 /* 781 * Check to see if any active $FABRIC_MOD exports exist. If they 782 * do exist, fail here as changing this information on the fly 783 * (underneath the initiator side OS dependent multipath code) 784 * could cause negative effects. 785 */ 786 if (dev->export_count) { 787 pr_err("Unable to set VPD Unit Serial while" 788 " active %d $FABRIC_MOD exports exist\n", 789 dev->export_count); 790 return -EINVAL; 791 } 792 793 /* 794 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 795 * 796 * Also, strip any newline added from the userspace 797 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 798 */ 799 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 800 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 801 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 802 "%s", strstrip(buf)); 803 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 804 805 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 806 " %s\n", dev->t10_wwn.unit_serial); 807 808 return count; 809 } 810 811 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 812 813 /* 814 * VPD page 0x83 Protocol Identifier 815 */ 816 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 817 struct t10_wwn *t10_wwn, 818 char *page) 819 { 820 struct t10_vpd *vpd; 821 unsigned char buf[VPD_TMP_BUF_SIZE]; 822 ssize_t len = 0; 823 824 memset(buf, 0, VPD_TMP_BUF_SIZE); 825 826 spin_lock(&t10_wwn->t10_vpd_lock); 827 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 828 if (!vpd->protocol_identifier_set) 829 continue; 830 831 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 832 833 if (len + strlen(buf) >= PAGE_SIZE) 834 break; 835 836 len += sprintf(page+len, "%s", buf); 837 } 838 spin_unlock(&t10_wwn->t10_vpd_lock); 839 840 return len; 841 } 842 843 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 844 struct t10_wwn *t10_wwn, 845 const char *page, 846 size_t count) 847 { 848 return -ENOSYS; 849 } 850 851 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 852 853 /* 854 * Generic wrapper for dumping VPD identifiers by association. 855 */ 856 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 857 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 858 struct t10_wwn *t10_wwn, \ 859 char *page) \ 860 { \ 861 struct t10_vpd *vpd; \ 862 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 863 ssize_t len = 0; \ 864 \ 865 spin_lock(&t10_wwn->t10_vpd_lock); \ 866 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 867 if (vpd->association != _assoc) \ 868 continue; \ 869 \ 870 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 871 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 872 if (len + strlen(buf) >= PAGE_SIZE) \ 873 break; \ 874 len += sprintf(page+len, "%s", buf); \ 875 \ 876 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 877 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 878 if (len + strlen(buf) >= PAGE_SIZE) \ 879 break; \ 880 len += sprintf(page+len, "%s", buf); \ 881 \ 882 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 883 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 884 if (len + strlen(buf) >= PAGE_SIZE) \ 885 break; \ 886 len += sprintf(page+len, "%s", buf); \ 887 } \ 888 spin_unlock(&t10_wwn->t10_vpd_lock); \ 889 \ 890 return len; \ 891 } 892 893 /* 894 * VPD page 0x83 Association: Logical Unit 895 */ 896 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 897 898 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 899 struct t10_wwn *t10_wwn, 900 const char *page, 901 size_t count) 902 { 903 return -ENOSYS; 904 } 905 906 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 907 908 /* 909 * VPD page 0x83 Association: Target Port 910 */ 911 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 912 913 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 914 struct t10_wwn *t10_wwn, 915 const char *page, 916 size_t count) 917 { 918 return -ENOSYS; 919 } 920 921 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 922 923 /* 924 * VPD page 0x83 Association: SCSI Target Device 925 */ 926 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 927 928 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 929 struct t10_wwn *t10_wwn, 930 const char *page, 931 size_t count) 932 { 933 return -ENOSYS; 934 } 935 936 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 937 938 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 939 940 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 941 &target_core_dev_wwn_vpd_unit_serial.attr, 942 &target_core_dev_wwn_vpd_protocol_identifier.attr, 943 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 944 &target_core_dev_wwn_vpd_assoc_target_port.attr, 945 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 946 NULL, 947 }; 948 949 static struct configfs_item_operations target_core_dev_wwn_ops = { 950 .show_attribute = target_core_dev_wwn_attr_show, 951 .store_attribute = target_core_dev_wwn_attr_store, 952 }; 953 954 static struct config_item_type target_core_dev_wwn_cit = { 955 .ct_item_ops = &target_core_dev_wwn_ops, 956 .ct_attrs = target_core_dev_wwn_attrs, 957 .ct_owner = THIS_MODULE, 958 }; 959 960 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 961 962 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 963 964 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 965 #define SE_DEV_PR_ATTR(_name, _mode) \ 966 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 967 __CONFIGFS_EATTR(_name, _mode, \ 968 target_core_dev_pr_show_attr_##_name, \ 969 target_core_dev_pr_store_attr_##_name); 970 971 #define SE_DEV_PR_ATTR_RO(_name); \ 972 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 973 __CONFIGFS_EATTR_RO(_name, \ 974 target_core_dev_pr_show_attr_##_name); 975 976 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 977 char *page) 978 { 979 struct se_node_acl *se_nacl; 980 struct t10_pr_registration *pr_reg; 981 char i_buf[PR_REG_ISID_ID_LEN]; 982 int prf_isid; 983 984 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 985 986 pr_reg = dev->dev_pr_res_holder; 987 if (!pr_reg) 988 return sprintf(page, "No SPC-3 Reservation holder\n"); 989 990 se_nacl = pr_reg->pr_reg_nacl; 991 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 992 PR_REG_ISID_ID_LEN); 993 994 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 995 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 996 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 997 } 998 999 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1000 char *page) 1001 { 1002 struct se_node_acl *se_nacl; 1003 ssize_t len; 1004 1005 se_nacl = dev->dev_reserved_node_acl; 1006 if (se_nacl) { 1007 len = sprintf(page, 1008 "SPC-2 Reservation: %s Initiator: %s\n", 1009 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1010 se_nacl->initiatorname); 1011 } else { 1012 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1013 } 1014 return len; 1015 } 1016 1017 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 1018 char *page) 1019 { 1020 int ret; 1021 1022 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1023 return sprintf(page, "Passthrough\n"); 1024 1025 spin_lock(&dev->dev_reservation_lock); 1026 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1027 ret = target_core_dev_pr_show_spc2_res(dev, page); 1028 else 1029 ret = target_core_dev_pr_show_spc3_res(dev, page); 1030 spin_unlock(&dev->dev_reservation_lock); 1031 return ret; 1032 } 1033 1034 SE_DEV_PR_ATTR_RO(res_holder); 1035 1036 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1037 struct se_device *dev, char *page) 1038 { 1039 ssize_t len = 0; 1040 1041 spin_lock(&dev->dev_reservation_lock); 1042 if (!dev->dev_pr_res_holder) { 1043 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1044 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1045 len = sprintf(page, "SPC-3 Reservation: All Target" 1046 " Ports registration\n"); 1047 } else { 1048 len = sprintf(page, "SPC-3 Reservation: Single" 1049 " Target Port registration\n"); 1050 } 1051 1052 spin_unlock(&dev->dev_reservation_lock); 1053 return len; 1054 } 1055 1056 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1057 1058 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1059 struct se_device *dev, char *page) 1060 { 1061 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 1062 } 1063 1064 SE_DEV_PR_ATTR_RO(res_pr_generation); 1065 1066 /* 1067 * res_pr_holder_tg_port 1068 */ 1069 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1070 struct se_device *dev, char *page) 1071 { 1072 struct se_node_acl *se_nacl; 1073 struct se_lun *lun; 1074 struct se_portal_group *se_tpg; 1075 struct t10_pr_registration *pr_reg; 1076 struct target_core_fabric_ops *tfo; 1077 ssize_t len = 0; 1078 1079 spin_lock(&dev->dev_reservation_lock); 1080 pr_reg = dev->dev_pr_res_holder; 1081 if (!pr_reg) { 1082 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1083 goto out_unlock; 1084 } 1085 1086 se_nacl = pr_reg->pr_reg_nacl; 1087 se_tpg = se_nacl->se_tpg; 1088 lun = pr_reg->pr_reg_tg_pt_lun; 1089 tfo = se_tpg->se_tpg_tfo; 1090 1091 len += sprintf(page+len, "SPC-3 Reservation: %s" 1092 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1093 tfo->tpg_get_wwn(se_tpg)); 1094 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1095 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1096 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1097 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1098 tfo->get_fabric_name(), lun->unpacked_lun); 1099 1100 out_unlock: 1101 spin_unlock(&dev->dev_reservation_lock); 1102 return len; 1103 } 1104 1105 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1106 1107 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1108 struct se_device *dev, char *page) 1109 { 1110 struct target_core_fabric_ops *tfo; 1111 struct t10_pr_registration *pr_reg; 1112 unsigned char buf[384]; 1113 char i_buf[PR_REG_ISID_ID_LEN]; 1114 ssize_t len = 0; 1115 int reg_count = 0, prf_isid; 1116 1117 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1118 1119 spin_lock(&dev->t10_pr.registration_lock); 1120 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1121 pr_reg_list) { 1122 1123 memset(buf, 0, 384); 1124 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1125 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1126 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1127 PR_REG_ISID_ID_LEN); 1128 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1129 tfo->get_fabric_name(), 1130 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ? 1131 &i_buf[0] : "", pr_reg->pr_res_key, 1132 pr_reg->pr_res_generation); 1133 1134 if (len + strlen(buf) >= PAGE_SIZE) 1135 break; 1136 1137 len += sprintf(page+len, "%s", buf); 1138 reg_count++; 1139 } 1140 spin_unlock(&dev->t10_pr.registration_lock); 1141 1142 if (!reg_count) 1143 len += sprintf(page+len, "None\n"); 1144 1145 return len; 1146 } 1147 1148 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1149 1150 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1151 struct se_device *dev, char *page) 1152 { 1153 struct t10_pr_registration *pr_reg; 1154 ssize_t len = 0; 1155 1156 spin_lock(&dev->dev_reservation_lock); 1157 pr_reg = dev->dev_pr_res_holder; 1158 if (pr_reg) { 1159 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1160 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1161 } else { 1162 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1163 } 1164 1165 spin_unlock(&dev->dev_reservation_lock); 1166 return len; 1167 } 1168 1169 SE_DEV_PR_ATTR_RO(res_pr_type); 1170 1171 static ssize_t target_core_dev_pr_show_attr_res_type( 1172 struct se_device *dev, char *page) 1173 { 1174 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1175 return sprintf(page, "SPC_PASSTHROUGH\n"); 1176 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1177 return sprintf(page, "SPC2_RESERVATIONS\n"); 1178 else 1179 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1180 } 1181 1182 SE_DEV_PR_ATTR_RO(res_type); 1183 1184 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1185 struct se_device *dev, char *page) 1186 { 1187 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1188 return 0; 1189 1190 return sprintf(page, "APTPL Bit Status: %s\n", 1191 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1192 } 1193 1194 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1195 1196 /* 1197 * res_aptpl_metadata 1198 */ 1199 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1200 struct se_device *dev, char *page) 1201 { 1202 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1203 return 0; 1204 1205 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1206 } 1207 1208 enum { 1209 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1210 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1211 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1212 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1213 }; 1214 1215 static match_table_t tokens = { 1216 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1217 {Opt_initiator_node, "initiator_node=%s"}, 1218 {Opt_initiator_sid, "initiator_sid=%s"}, 1219 {Opt_sa_res_key, "sa_res_key=%s"}, 1220 {Opt_res_holder, "res_holder=%d"}, 1221 {Opt_res_type, "res_type=%d"}, 1222 {Opt_res_scope, "res_scope=%d"}, 1223 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1224 {Opt_mapped_lun, "mapped_lun=%d"}, 1225 {Opt_target_fabric, "target_fabric=%s"}, 1226 {Opt_target_node, "target_node=%s"}, 1227 {Opt_tpgt, "tpgt=%d"}, 1228 {Opt_port_rtpi, "port_rtpi=%d"}, 1229 {Opt_target_lun, "target_lun=%d"}, 1230 {Opt_err, NULL} 1231 }; 1232 1233 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1234 struct se_device *dev, 1235 const char *page, 1236 size_t count) 1237 { 1238 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1239 unsigned char *t_fabric = NULL, *t_port = NULL; 1240 char *orig, *ptr, *arg_p, *opts; 1241 substring_t args[MAX_OPT_ARGS]; 1242 unsigned long long tmp_ll; 1243 u64 sa_res_key = 0; 1244 u32 mapped_lun = 0, target_lun = 0; 1245 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1246 u16 port_rpti = 0, tpgt = 0; 1247 u8 type = 0, scope; 1248 1249 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1250 return 0; 1251 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1252 return 0; 1253 1254 if (dev->export_count) { 1255 pr_debug("Unable to process APTPL metadata while" 1256 " active fabric exports exist\n"); 1257 return -EINVAL; 1258 } 1259 1260 opts = kstrdup(page, GFP_KERNEL); 1261 if (!opts) 1262 return -ENOMEM; 1263 1264 orig = opts; 1265 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1266 if (!*ptr) 1267 continue; 1268 1269 token = match_token(ptr, tokens, args); 1270 switch (token) { 1271 case Opt_initiator_fabric: 1272 i_fabric = match_strdup(&args[0]); 1273 if (!i_fabric) { 1274 ret = -ENOMEM; 1275 goto out; 1276 } 1277 break; 1278 case Opt_initiator_node: 1279 i_port = match_strdup(&args[0]); 1280 if (!i_port) { 1281 ret = -ENOMEM; 1282 goto out; 1283 } 1284 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1285 pr_err("APTPL metadata initiator_node=" 1286 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1287 PR_APTPL_MAX_IPORT_LEN); 1288 ret = -EINVAL; 1289 break; 1290 } 1291 break; 1292 case Opt_initiator_sid: 1293 isid = match_strdup(&args[0]); 1294 if (!isid) { 1295 ret = -ENOMEM; 1296 goto out; 1297 } 1298 if (strlen(isid) >= PR_REG_ISID_LEN) { 1299 pr_err("APTPL metadata initiator_isid" 1300 "= exceeds PR_REG_ISID_LEN: %d\n", 1301 PR_REG_ISID_LEN); 1302 ret = -EINVAL; 1303 break; 1304 } 1305 break; 1306 case Opt_sa_res_key: 1307 arg_p = match_strdup(&args[0]); 1308 if (!arg_p) { 1309 ret = -ENOMEM; 1310 goto out; 1311 } 1312 ret = strict_strtoull(arg_p, 0, &tmp_ll); 1313 if (ret < 0) { 1314 pr_err("strict_strtoull() failed for" 1315 " sa_res_key=\n"); 1316 goto out; 1317 } 1318 sa_res_key = (u64)tmp_ll; 1319 break; 1320 /* 1321 * PR APTPL Metadata for Reservation 1322 */ 1323 case Opt_res_holder: 1324 match_int(args, &arg); 1325 res_holder = arg; 1326 break; 1327 case Opt_res_type: 1328 match_int(args, &arg); 1329 type = (u8)arg; 1330 break; 1331 case Opt_res_scope: 1332 match_int(args, &arg); 1333 scope = (u8)arg; 1334 break; 1335 case Opt_res_all_tg_pt: 1336 match_int(args, &arg); 1337 all_tg_pt = (int)arg; 1338 break; 1339 case Opt_mapped_lun: 1340 match_int(args, &arg); 1341 mapped_lun = (u32)arg; 1342 break; 1343 /* 1344 * PR APTPL Metadata for Target Port 1345 */ 1346 case Opt_target_fabric: 1347 t_fabric = match_strdup(&args[0]); 1348 if (!t_fabric) { 1349 ret = -ENOMEM; 1350 goto out; 1351 } 1352 break; 1353 case Opt_target_node: 1354 t_port = match_strdup(&args[0]); 1355 if (!t_port) { 1356 ret = -ENOMEM; 1357 goto out; 1358 } 1359 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1360 pr_err("APTPL metadata target_node=" 1361 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1362 PR_APTPL_MAX_TPORT_LEN); 1363 ret = -EINVAL; 1364 break; 1365 } 1366 break; 1367 case Opt_tpgt: 1368 match_int(args, &arg); 1369 tpgt = (u16)arg; 1370 break; 1371 case Opt_port_rtpi: 1372 match_int(args, &arg); 1373 port_rpti = (u16)arg; 1374 break; 1375 case Opt_target_lun: 1376 match_int(args, &arg); 1377 target_lun = (u32)arg; 1378 break; 1379 default: 1380 break; 1381 } 1382 } 1383 1384 if (!i_port || !t_port || !sa_res_key) { 1385 pr_err("Illegal parameters for APTPL registration\n"); 1386 ret = -EINVAL; 1387 goto out; 1388 } 1389 1390 if (res_holder && !(type)) { 1391 pr_err("Illegal PR type: 0x%02x for reservation" 1392 " holder\n", type); 1393 ret = -EINVAL; 1394 goto out; 1395 } 1396 1397 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1398 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1399 res_holder, all_tg_pt, type); 1400 out: 1401 kfree(i_fabric); 1402 kfree(i_port); 1403 kfree(isid); 1404 kfree(t_fabric); 1405 kfree(t_port); 1406 kfree(orig); 1407 return (ret == 0) ? count : ret; 1408 } 1409 1410 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1411 1412 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1413 1414 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1415 &target_core_dev_pr_res_holder.attr, 1416 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1417 &target_core_dev_pr_res_pr_generation.attr, 1418 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1419 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1420 &target_core_dev_pr_res_pr_type.attr, 1421 &target_core_dev_pr_res_type.attr, 1422 &target_core_dev_pr_res_aptpl_active.attr, 1423 &target_core_dev_pr_res_aptpl_metadata.attr, 1424 NULL, 1425 }; 1426 1427 static struct configfs_item_operations target_core_dev_pr_ops = { 1428 .show_attribute = target_core_dev_pr_attr_show, 1429 .store_attribute = target_core_dev_pr_attr_store, 1430 }; 1431 1432 static struct config_item_type target_core_dev_pr_cit = { 1433 .ct_item_ops = &target_core_dev_pr_ops, 1434 .ct_attrs = target_core_dev_pr_attrs, 1435 .ct_owner = THIS_MODULE, 1436 }; 1437 1438 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1439 1440 /* Start functions for struct config_item_type target_core_dev_cit */ 1441 1442 static ssize_t target_core_show_dev_info(void *p, char *page) 1443 { 1444 struct se_device *dev = p; 1445 struct se_subsystem_api *t = dev->transport; 1446 int bl = 0; 1447 ssize_t read_bytes = 0; 1448 1449 transport_dump_dev_state(dev, page, &bl); 1450 read_bytes += bl; 1451 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes); 1452 return read_bytes; 1453 } 1454 1455 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1456 .attr = { .ca_owner = THIS_MODULE, 1457 .ca_name = "info", 1458 .ca_mode = S_IRUGO }, 1459 .show = target_core_show_dev_info, 1460 .store = NULL, 1461 }; 1462 1463 static ssize_t target_core_store_dev_control( 1464 void *p, 1465 const char *page, 1466 size_t count) 1467 { 1468 struct se_device *dev = p; 1469 struct se_subsystem_api *t = dev->transport; 1470 1471 return t->set_configfs_dev_params(dev, page, count); 1472 } 1473 1474 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1475 .attr = { .ca_owner = THIS_MODULE, 1476 .ca_name = "control", 1477 .ca_mode = S_IWUSR }, 1478 .show = NULL, 1479 .store = target_core_store_dev_control, 1480 }; 1481 1482 static ssize_t target_core_show_dev_alias(void *p, char *page) 1483 { 1484 struct se_device *dev = p; 1485 1486 if (!(dev->dev_flags & DF_USING_ALIAS)) 1487 return 0; 1488 1489 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1490 } 1491 1492 static ssize_t target_core_store_dev_alias( 1493 void *p, 1494 const char *page, 1495 size_t count) 1496 { 1497 struct se_device *dev = p; 1498 struct se_hba *hba = dev->se_hba; 1499 ssize_t read_bytes; 1500 1501 if (count > (SE_DEV_ALIAS_LEN-1)) { 1502 pr_err("alias count: %d exceeds" 1503 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1504 SE_DEV_ALIAS_LEN-1); 1505 return -EINVAL; 1506 } 1507 1508 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1509 if (!read_bytes) 1510 return -EINVAL; 1511 if (dev->dev_alias[read_bytes - 1] == '\n') 1512 dev->dev_alias[read_bytes - 1] = '\0'; 1513 1514 dev->dev_flags |= DF_USING_ALIAS; 1515 1516 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1517 config_item_name(&hba->hba_group.cg_item), 1518 config_item_name(&dev->dev_group.cg_item), 1519 dev->dev_alias); 1520 1521 return read_bytes; 1522 } 1523 1524 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1525 .attr = { .ca_owner = THIS_MODULE, 1526 .ca_name = "alias", 1527 .ca_mode = S_IRUGO | S_IWUSR }, 1528 .show = target_core_show_dev_alias, 1529 .store = target_core_store_dev_alias, 1530 }; 1531 1532 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1533 { 1534 struct se_device *dev = p; 1535 1536 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1537 return 0; 1538 1539 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1540 } 1541 1542 static ssize_t target_core_store_dev_udev_path( 1543 void *p, 1544 const char *page, 1545 size_t count) 1546 { 1547 struct se_device *dev = p; 1548 struct se_hba *hba = dev->se_hba; 1549 ssize_t read_bytes; 1550 1551 if (count > (SE_UDEV_PATH_LEN-1)) { 1552 pr_err("udev_path count: %d exceeds" 1553 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1554 SE_UDEV_PATH_LEN-1); 1555 return -EINVAL; 1556 } 1557 1558 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1559 "%s", page); 1560 if (!read_bytes) 1561 return -EINVAL; 1562 if (dev->udev_path[read_bytes - 1] == '\n') 1563 dev->udev_path[read_bytes - 1] = '\0'; 1564 1565 dev->dev_flags |= DF_USING_UDEV_PATH; 1566 1567 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1568 config_item_name(&hba->hba_group.cg_item), 1569 config_item_name(&dev->dev_group.cg_item), 1570 dev->udev_path); 1571 1572 return read_bytes; 1573 } 1574 1575 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1576 .attr = { .ca_owner = THIS_MODULE, 1577 .ca_name = "udev_path", 1578 .ca_mode = S_IRUGO | S_IWUSR }, 1579 .show = target_core_show_dev_udev_path, 1580 .store = target_core_store_dev_udev_path, 1581 }; 1582 1583 static ssize_t target_core_store_dev_enable( 1584 void *p, 1585 const char *page, 1586 size_t count) 1587 { 1588 struct se_device *dev = p; 1589 char *ptr; 1590 int ret; 1591 1592 ptr = strstr(page, "1"); 1593 if (!ptr) { 1594 pr_err("For dev_enable ops, only valid value" 1595 " is \"1\"\n"); 1596 return -EINVAL; 1597 } 1598 1599 ret = target_configure_device(dev); 1600 if (ret) 1601 return ret; 1602 return count; 1603 } 1604 1605 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1606 .attr = { .ca_owner = THIS_MODULE, 1607 .ca_name = "enable", 1608 .ca_mode = S_IWUSR }, 1609 .show = NULL, 1610 .store = target_core_store_dev_enable, 1611 }; 1612 1613 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1614 { 1615 struct se_device *dev = p; 1616 struct config_item *lu_ci; 1617 struct t10_alua_lu_gp *lu_gp; 1618 struct t10_alua_lu_gp_member *lu_gp_mem; 1619 ssize_t len = 0; 1620 1621 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1622 if (!lu_gp_mem) 1623 return 0; 1624 1625 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1626 lu_gp = lu_gp_mem->lu_gp; 1627 if (lu_gp) { 1628 lu_ci = &lu_gp->lu_gp_group.cg_item; 1629 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1630 config_item_name(lu_ci), lu_gp->lu_gp_id); 1631 } 1632 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1633 1634 return len; 1635 } 1636 1637 static ssize_t target_core_store_alua_lu_gp( 1638 void *p, 1639 const char *page, 1640 size_t count) 1641 { 1642 struct se_device *dev = p; 1643 struct se_hba *hba = dev->se_hba; 1644 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1645 struct t10_alua_lu_gp_member *lu_gp_mem; 1646 unsigned char buf[LU_GROUP_NAME_BUF]; 1647 int move = 0; 1648 1649 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1650 if (!lu_gp_mem) 1651 return 0; 1652 1653 if (count > LU_GROUP_NAME_BUF) { 1654 pr_err("ALUA LU Group Alias too large!\n"); 1655 return -EINVAL; 1656 } 1657 memset(buf, 0, LU_GROUP_NAME_BUF); 1658 memcpy(buf, page, count); 1659 /* 1660 * Any ALUA logical unit alias besides "NULL" means we will be 1661 * making a new group association. 1662 */ 1663 if (strcmp(strstrip(buf), "NULL")) { 1664 /* 1665 * core_alua_get_lu_gp_by_name() will increment reference to 1666 * struct t10_alua_lu_gp. This reference is released with 1667 * core_alua_get_lu_gp_by_name below(). 1668 */ 1669 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1670 if (!lu_gp_new) 1671 return -ENODEV; 1672 } 1673 1674 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1675 lu_gp = lu_gp_mem->lu_gp; 1676 if (lu_gp) { 1677 /* 1678 * Clearing an existing lu_gp association, and replacing 1679 * with NULL 1680 */ 1681 if (!lu_gp_new) { 1682 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1683 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1684 " %hu\n", 1685 config_item_name(&hba->hba_group.cg_item), 1686 config_item_name(&dev->dev_group.cg_item), 1687 config_item_name(&lu_gp->lu_gp_group.cg_item), 1688 lu_gp->lu_gp_id); 1689 1690 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1691 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1692 1693 return count; 1694 } 1695 /* 1696 * Removing existing association of lu_gp_mem with lu_gp 1697 */ 1698 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1699 move = 1; 1700 } 1701 /* 1702 * Associate lu_gp_mem with lu_gp_new. 1703 */ 1704 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1705 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1706 1707 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1708 " core/alua/lu_gps/%s, ID: %hu\n", 1709 (move) ? "Moving" : "Adding", 1710 config_item_name(&hba->hba_group.cg_item), 1711 config_item_name(&dev->dev_group.cg_item), 1712 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1713 lu_gp_new->lu_gp_id); 1714 1715 core_alua_put_lu_gp_from_name(lu_gp_new); 1716 return count; 1717 } 1718 1719 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1720 .attr = { .ca_owner = THIS_MODULE, 1721 .ca_name = "alua_lu_gp", 1722 .ca_mode = S_IRUGO | S_IWUSR }, 1723 .show = target_core_show_alua_lu_gp, 1724 .store = target_core_store_alua_lu_gp, 1725 }; 1726 1727 static struct configfs_attribute *lio_core_dev_attrs[] = { 1728 &target_core_attr_dev_info.attr, 1729 &target_core_attr_dev_control.attr, 1730 &target_core_attr_dev_alias.attr, 1731 &target_core_attr_dev_udev_path.attr, 1732 &target_core_attr_dev_enable.attr, 1733 &target_core_attr_dev_alua_lu_gp.attr, 1734 NULL, 1735 }; 1736 1737 static void target_core_dev_release(struct config_item *item) 1738 { 1739 struct config_group *dev_cg = to_config_group(item); 1740 struct se_device *dev = 1741 container_of(dev_cg, struct se_device, dev_group); 1742 1743 kfree(dev_cg->default_groups); 1744 target_free_device(dev); 1745 } 1746 1747 static ssize_t target_core_dev_show(struct config_item *item, 1748 struct configfs_attribute *attr, 1749 char *page) 1750 { 1751 struct config_group *dev_cg = to_config_group(item); 1752 struct se_device *dev = 1753 container_of(dev_cg, struct se_device, dev_group); 1754 struct target_core_configfs_attribute *tc_attr = container_of( 1755 attr, struct target_core_configfs_attribute, attr); 1756 1757 if (!tc_attr->show) 1758 return -EINVAL; 1759 1760 return tc_attr->show(dev, page); 1761 } 1762 1763 static ssize_t target_core_dev_store(struct config_item *item, 1764 struct configfs_attribute *attr, 1765 const char *page, size_t count) 1766 { 1767 struct config_group *dev_cg = to_config_group(item); 1768 struct se_device *dev = 1769 container_of(dev_cg, struct se_device, dev_group); 1770 struct target_core_configfs_attribute *tc_attr = container_of( 1771 attr, struct target_core_configfs_attribute, attr); 1772 1773 if (!tc_attr->store) 1774 return -EINVAL; 1775 1776 return tc_attr->store(dev, page, count); 1777 } 1778 1779 static struct configfs_item_operations target_core_dev_item_ops = { 1780 .release = target_core_dev_release, 1781 .show_attribute = target_core_dev_show, 1782 .store_attribute = target_core_dev_store, 1783 }; 1784 1785 static struct config_item_type target_core_dev_cit = { 1786 .ct_item_ops = &target_core_dev_item_ops, 1787 .ct_attrs = lio_core_dev_attrs, 1788 .ct_owner = THIS_MODULE, 1789 }; 1790 1791 /* End functions for struct config_item_type target_core_dev_cit */ 1792 1793 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 1794 1795 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 1796 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 1797 static struct target_core_alua_lu_gp_attribute \ 1798 target_core_alua_lu_gp_##_name = \ 1799 __CONFIGFS_EATTR(_name, _mode, \ 1800 target_core_alua_lu_gp_show_attr_##_name, \ 1801 target_core_alua_lu_gp_store_attr_##_name); 1802 1803 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 1804 static struct target_core_alua_lu_gp_attribute \ 1805 target_core_alua_lu_gp_##_name = \ 1806 __CONFIGFS_EATTR_RO(_name, \ 1807 target_core_alua_lu_gp_show_attr_##_name); 1808 1809 /* 1810 * lu_gp_id 1811 */ 1812 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 1813 struct t10_alua_lu_gp *lu_gp, 1814 char *page) 1815 { 1816 if (!lu_gp->lu_gp_valid_id) 1817 return 0; 1818 1819 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 1820 } 1821 1822 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 1823 struct t10_alua_lu_gp *lu_gp, 1824 const char *page, 1825 size_t count) 1826 { 1827 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 1828 unsigned long lu_gp_id; 1829 int ret; 1830 1831 ret = strict_strtoul(page, 0, &lu_gp_id); 1832 if (ret < 0) { 1833 pr_err("strict_strtoul() returned %d for" 1834 " lu_gp_id\n", ret); 1835 return -EINVAL; 1836 } 1837 if (lu_gp_id > 0x0000ffff) { 1838 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 1839 " 0x0000ffff\n", lu_gp_id); 1840 return -EINVAL; 1841 } 1842 1843 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 1844 if (ret < 0) 1845 return -EINVAL; 1846 1847 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 1848 " Group: core/alua/lu_gps/%s to ID: %hu\n", 1849 config_item_name(&alua_lu_gp_cg->cg_item), 1850 lu_gp->lu_gp_id); 1851 1852 return count; 1853 } 1854 1855 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 1856 1857 /* 1858 * members 1859 */ 1860 static ssize_t target_core_alua_lu_gp_show_attr_members( 1861 struct t10_alua_lu_gp *lu_gp, 1862 char *page) 1863 { 1864 struct se_device *dev; 1865 struct se_hba *hba; 1866 struct t10_alua_lu_gp_member *lu_gp_mem; 1867 ssize_t len = 0, cur_len; 1868 unsigned char buf[LU_GROUP_NAME_BUF]; 1869 1870 memset(buf, 0, LU_GROUP_NAME_BUF); 1871 1872 spin_lock(&lu_gp->lu_gp_lock); 1873 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 1874 dev = lu_gp_mem->lu_gp_mem_dev; 1875 hba = dev->se_hba; 1876 1877 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 1878 config_item_name(&hba->hba_group.cg_item), 1879 config_item_name(&dev->dev_group.cg_item)); 1880 cur_len++; /* Extra byte for NULL terminator */ 1881 1882 if ((cur_len + len) > PAGE_SIZE) { 1883 pr_warn("Ran out of lu_gp_show_attr" 1884 "_members buffer\n"); 1885 break; 1886 } 1887 memcpy(page+len, buf, cur_len); 1888 len += cur_len; 1889 } 1890 spin_unlock(&lu_gp->lu_gp_lock); 1891 1892 return len; 1893 } 1894 1895 SE_DEV_ALUA_LU_ATTR_RO(members); 1896 1897 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 1898 1899 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 1900 &target_core_alua_lu_gp_lu_gp_id.attr, 1901 &target_core_alua_lu_gp_members.attr, 1902 NULL, 1903 }; 1904 1905 static void target_core_alua_lu_gp_release(struct config_item *item) 1906 { 1907 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1908 struct t10_alua_lu_gp, lu_gp_group); 1909 1910 core_alua_free_lu_gp(lu_gp); 1911 } 1912 1913 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 1914 .release = target_core_alua_lu_gp_release, 1915 .show_attribute = target_core_alua_lu_gp_attr_show, 1916 .store_attribute = target_core_alua_lu_gp_attr_store, 1917 }; 1918 1919 static struct config_item_type target_core_alua_lu_gp_cit = { 1920 .ct_item_ops = &target_core_alua_lu_gp_ops, 1921 .ct_attrs = target_core_alua_lu_gp_attrs, 1922 .ct_owner = THIS_MODULE, 1923 }; 1924 1925 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 1926 1927 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 1928 1929 static struct config_group *target_core_alua_create_lu_gp( 1930 struct config_group *group, 1931 const char *name) 1932 { 1933 struct t10_alua_lu_gp *lu_gp; 1934 struct config_group *alua_lu_gp_cg = NULL; 1935 struct config_item *alua_lu_gp_ci = NULL; 1936 1937 lu_gp = core_alua_allocate_lu_gp(name, 0); 1938 if (IS_ERR(lu_gp)) 1939 return NULL; 1940 1941 alua_lu_gp_cg = &lu_gp->lu_gp_group; 1942 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 1943 1944 config_group_init_type_name(alua_lu_gp_cg, name, 1945 &target_core_alua_lu_gp_cit); 1946 1947 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 1948 " Group: core/alua/lu_gps/%s\n", 1949 config_item_name(alua_lu_gp_ci)); 1950 1951 return alua_lu_gp_cg; 1952 1953 } 1954 1955 static void target_core_alua_drop_lu_gp( 1956 struct config_group *group, 1957 struct config_item *item) 1958 { 1959 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1960 struct t10_alua_lu_gp, lu_gp_group); 1961 1962 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 1963 " Group: core/alua/lu_gps/%s, ID: %hu\n", 1964 config_item_name(item), lu_gp->lu_gp_id); 1965 /* 1966 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 1967 * -> target_core_alua_lu_gp_release() 1968 */ 1969 config_item_put(item); 1970 } 1971 1972 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 1973 .make_group = &target_core_alua_create_lu_gp, 1974 .drop_item = &target_core_alua_drop_lu_gp, 1975 }; 1976 1977 static struct config_item_type target_core_alua_lu_gps_cit = { 1978 .ct_item_ops = NULL, 1979 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 1980 .ct_owner = THIS_MODULE, 1981 }; 1982 1983 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 1984 1985 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 1986 1987 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 1988 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 1989 static struct target_core_alua_tg_pt_gp_attribute \ 1990 target_core_alua_tg_pt_gp_##_name = \ 1991 __CONFIGFS_EATTR(_name, _mode, \ 1992 target_core_alua_tg_pt_gp_show_attr_##_name, \ 1993 target_core_alua_tg_pt_gp_store_attr_##_name); 1994 1995 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 1996 static struct target_core_alua_tg_pt_gp_attribute \ 1997 target_core_alua_tg_pt_gp_##_name = \ 1998 __CONFIGFS_EATTR_RO(_name, \ 1999 target_core_alua_tg_pt_gp_show_attr_##_name); 2000 2001 /* 2002 * alua_access_state 2003 */ 2004 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2005 struct t10_alua_tg_pt_gp *tg_pt_gp, 2006 char *page) 2007 { 2008 return sprintf(page, "%d\n", 2009 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2010 } 2011 2012 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2013 struct t10_alua_tg_pt_gp *tg_pt_gp, 2014 const char *page, 2015 size_t count) 2016 { 2017 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2018 unsigned long tmp; 2019 int new_state, ret; 2020 2021 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2022 pr_err("Unable to do implict ALUA on non valid" 2023 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2024 return -EINVAL; 2025 } 2026 2027 ret = strict_strtoul(page, 0, &tmp); 2028 if (ret < 0) { 2029 pr_err("Unable to extract new ALUA access state from" 2030 " %s\n", page); 2031 return -EINVAL; 2032 } 2033 new_state = (int)tmp; 2034 2035 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { 2036 pr_err("Unable to process implict configfs ALUA" 2037 " transition while TPGS_IMPLICT_ALUA is disabled\n"); 2038 return -EINVAL; 2039 } 2040 2041 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2042 NULL, NULL, new_state, 0); 2043 return (!ret) ? count : -EINVAL; 2044 } 2045 2046 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2047 2048 /* 2049 * alua_access_status 2050 */ 2051 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2052 struct t10_alua_tg_pt_gp *tg_pt_gp, 2053 char *page) 2054 { 2055 return sprintf(page, "%s\n", 2056 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2057 } 2058 2059 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2060 struct t10_alua_tg_pt_gp *tg_pt_gp, 2061 const char *page, 2062 size_t count) 2063 { 2064 unsigned long tmp; 2065 int new_status, ret; 2066 2067 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2068 pr_err("Unable to do set ALUA access status on non" 2069 " valid tg_pt_gp ID: %hu\n", 2070 tg_pt_gp->tg_pt_gp_valid_id); 2071 return -EINVAL; 2072 } 2073 2074 ret = strict_strtoul(page, 0, &tmp); 2075 if (ret < 0) { 2076 pr_err("Unable to extract new ALUA access status" 2077 " from %s\n", page); 2078 return -EINVAL; 2079 } 2080 new_status = (int)tmp; 2081 2082 if ((new_status != ALUA_STATUS_NONE) && 2083 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && 2084 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 2085 pr_err("Illegal ALUA access status: 0x%02x\n", 2086 new_status); 2087 return -EINVAL; 2088 } 2089 2090 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2091 return count; 2092 } 2093 2094 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2095 2096 /* 2097 * alua_access_type 2098 */ 2099 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2100 struct t10_alua_tg_pt_gp *tg_pt_gp, 2101 char *page) 2102 { 2103 return core_alua_show_access_type(tg_pt_gp, page); 2104 } 2105 2106 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2107 struct t10_alua_tg_pt_gp *tg_pt_gp, 2108 const char *page, 2109 size_t count) 2110 { 2111 return core_alua_store_access_type(tg_pt_gp, page, count); 2112 } 2113 2114 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2115 2116 /* 2117 * alua_write_metadata 2118 */ 2119 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2120 struct t10_alua_tg_pt_gp *tg_pt_gp, 2121 char *page) 2122 { 2123 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2124 } 2125 2126 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2127 struct t10_alua_tg_pt_gp *tg_pt_gp, 2128 const char *page, 2129 size_t count) 2130 { 2131 unsigned long tmp; 2132 int ret; 2133 2134 ret = strict_strtoul(page, 0, &tmp); 2135 if (ret < 0) { 2136 pr_err("Unable to extract alua_write_metadata\n"); 2137 return -EINVAL; 2138 } 2139 2140 if ((tmp != 0) && (tmp != 1)) { 2141 pr_err("Illegal value for alua_write_metadata:" 2142 " %lu\n", tmp); 2143 return -EINVAL; 2144 } 2145 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2146 2147 return count; 2148 } 2149 2150 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2151 2152 2153 2154 /* 2155 * nonop_delay_msecs 2156 */ 2157 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2158 struct t10_alua_tg_pt_gp *tg_pt_gp, 2159 char *page) 2160 { 2161 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2162 2163 } 2164 2165 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2166 struct t10_alua_tg_pt_gp *tg_pt_gp, 2167 const char *page, 2168 size_t count) 2169 { 2170 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2171 } 2172 2173 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2174 2175 /* 2176 * trans_delay_msecs 2177 */ 2178 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2179 struct t10_alua_tg_pt_gp *tg_pt_gp, 2180 char *page) 2181 { 2182 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2183 } 2184 2185 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2186 struct t10_alua_tg_pt_gp *tg_pt_gp, 2187 const char *page, 2188 size_t count) 2189 { 2190 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2191 } 2192 2193 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2194 2195 /* 2196 * implict_trans_secs 2197 */ 2198 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs( 2199 struct t10_alua_tg_pt_gp *tg_pt_gp, 2200 char *page) 2201 { 2202 return core_alua_show_implict_trans_secs(tg_pt_gp, page); 2203 } 2204 2205 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs( 2206 struct t10_alua_tg_pt_gp *tg_pt_gp, 2207 const char *page, 2208 size_t count) 2209 { 2210 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count); 2211 } 2212 2213 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR); 2214 2215 /* 2216 * preferred 2217 */ 2218 2219 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2220 struct t10_alua_tg_pt_gp *tg_pt_gp, 2221 char *page) 2222 { 2223 return core_alua_show_preferred_bit(tg_pt_gp, page); 2224 } 2225 2226 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2227 struct t10_alua_tg_pt_gp *tg_pt_gp, 2228 const char *page, 2229 size_t count) 2230 { 2231 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2232 } 2233 2234 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2235 2236 /* 2237 * tg_pt_gp_id 2238 */ 2239 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2240 struct t10_alua_tg_pt_gp *tg_pt_gp, 2241 char *page) 2242 { 2243 if (!tg_pt_gp->tg_pt_gp_valid_id) 2244 return 0; 2245 2246 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2247 } 2248 2249 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2250 struct t10_alua_tg_pt_gp *tg_pt_gp, 2251 const char *page, 2252 size_t count) 2253 { 2254 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2255 unsigned long tg_pt_gp_id; 2256 int ret; 2257 2258 ret = strict_strtoul(page, 0, &tg_pt_gp_id); 2259 if (ret < 0) { 2260 pr_err("strict_strtoul() returned %d for" 2261 " tg_pt_gp_id\n", ret); 2262 return -EINVAL; 2263 } 2264 if (tg_pt_gp_id > 0x0000ffff) { 2265 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2266 " 0x0000ffff\n", tg_pt_gp_id); 2267 return -EINVAL; 2268 } 2269 2270 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2271 if (ret < 0) 2272 return -EINVAL; 2273 2274 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2275 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2276 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2277 tg_pt_gp->tg_pt_gp_id); 2278 2279 return count; 2280 } 2281 2282 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2283 2284 /* 2285 * members 2286 */ 2287 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2288 struct t10_alua_tg_pt_gp *tg_pt_gp, 2289 char *page) 2290 { 2291 struct se_port *port; 2292 struct se_portal_group *tpg; 2293 struct se_lun *lun; 2294 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2295 ssize_t len = 0, cur_len; 2296 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2297 2298 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2299 2300 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2301 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2302 tg_pt_gp_mem_list) { 2303 port = tg_pt_gp_mem->tg_pt; 2304 tpg = port->sep_tpg; 2305 lun = port->sep_lun; 2306 2307 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2308 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2309 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2310 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2311 config_item_name(&lun->lun_group.cg_item)); 2312 cur_len++; /* Extra byte for NULL terminator */ 2313 2314 if ((cur_len + len) > PAGE_SIZE) { 2315 pr_warn("Ran out of lu_gp_show_attr" 2316 "_members buffer\n"); 2317 break; 2318 } 2319 memcpy(page+len, buf, cur_len); 2320 len += cur_len; 2321 } 2322 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2323 2324 return len; 2325 } 2326 2327 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2328 2329 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2330 tg_pt_gp_group); 2331 2332 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2333 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2334 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2335 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2336 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2337 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2338 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2339 &target_core_alua_tg_pt_gp_implict_trans_secs.attr, 2340 &target_core_alua_tg_pt_gp_preferred.attr, 2341 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2342 &target_core_alua_tg_pt_gp_members.attr, 2343 NULL, 2344 }; 2345 2346 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2347 { 2348 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2349 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2350 2351 core_alua_free_tg_pt_gp(tg_pt_gp); 2352 } 2353 2354 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2355 .release = target_core_alua_tg_pt_gp_release, 2356 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2357 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2358 }; 2359 2360 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2361 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2362 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2363 .ct_owner = THIS_MODULE, 2364 }; 2365 2366 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2367 2368 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2369 2370 static struct config_group *target_core_alua_create_tg_pt_gp( 2371 struct config_group *group, 2372 const char *name) 2373 { 2374 struct t10_alua *alua = container_of(group, struct t10_alua, 2375 alua_tg_pt_gps_group); 2376 struct t10_alua_tg_pt_gp *tg_pt_gp; 2377 struct config_group *alua_tg_pt_gp_cg = NULL; 2378 struct config_item *alua_tg_pt_gp_ci = NULL; 2379 2380 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2381 if (!tg_pt_gp) 2382 return NULL; 2383 2384 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2385 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2386 2387 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2388 &target_core_alua_tg_pt_gp_cit); 2389 2390 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2391 " Group: alua/tg_pt_gps/%s\n", 2392 config_item_name(alua_tg_pt_gp_ci)); 2393 2394 return alua_tg_pt_gp_cg; 2395 } 2396 2397 static void target_core_alua_drop_tg_pt_gp( 2398 struct config_group *group, 2399 struct config_item *item) 2400 { 2401 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2402 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2403 2404 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2405 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2406 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2407 /* 2408 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2409 * -> target_core_alua_tg_pt_gp_release(). 2410 */ 2411 config_item_put(item); 2412 } 2413 2414 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2415 .make_group = &target_core_alua_create_tg_pt_gp, 2416 .drop_item = &target_core_alua_drop_tg_pt_gp, 2417 }; 2418 2419 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2420 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2421 .ct_owner = THIS_MODULE, 2422 }; 2423 2424 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2425 2426 /* Start functions for struct config_item_type target_core_alua_cit */ 2427 2428 /* 2429 * target_core_alua_cit is a ConfigFS group that lives under 2430 * /sys/kernel/config/target/core/alua. There are default groups 2431 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2432 * target_core_alua_cit in target_core_init_configfs() below. 2433 */ 2434 static struct config_item_type target_core_alua_cit = { 2435 .ct_item_ops = NULL, 2436 .ct_attrs = NULL, 2437 .ct_owner = THIS_MODULE, 2438 }; 2439 2440 /* End functions for struct config_item_type target_core_alua_cit */ 2441 2442 /* Start functions for struct config_item_type target_core_stat_cit */ 2443 2444 static struct config_group *target_core_stat_mkdir( 2445 struct config_group *group, 2446 const char *name) 2447 { 2448 return ERR_PTR(-ENOSYS); 2449 } 2450 2451 static void target_core_stat_rmdir( 2452 struct config_group *group, 2453 struct config_item *item) 2454 { 2455 return; 2456 } 2457 2458 static struct configfs_group_operations target_core_stat_group_ops = { 2459 .make_group = &target_core_stat_mkdir, 2460 .drop_item = &target_core_stat_rmdir, 2461 }; 2462 2463 static struct config_item_type target_core_stat_cit = { 2464 .ct_group_ops = &target_core_stat_group_ops, 2465 .ct_owner = THIS_MODULE, 2466 }; 2467 2468 /* End functions for struct config_item_type target_core_stat_cit */ 2469 2470 /* Start functions for struct config_item_type target_core_hba_cit */ 2471 2472 static struct config_group *target_core_make_subdev( 2473 struct config_group *group, 2474 const char *name) 2475 { 2476 struct t10_alua_tg_pt_gp *tg_pt_gp; 2477 struct se_subsystem_api *t; 2478 struct config_item *hba_ci = &group->cg_item; 2479 struct se_hba *hba = item_to_hba(hba_ci); 2480 struct se_device *dev; 2481 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2482 struct config_group *dev_stat_grp = NULL; 2483 int errno = -ENOMEM, ret; 2484 2485 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2486 if (ret) 2487 return ERR_PTR(ret); 2488 /* 2489 * Locate the struct se_subsystem_api from parent's struct se_hba. 2490 */ 2491 t = hba->transport; 2492 2493 dev = target_alloc_device(hba, name); 2494 if (!dev) 2495 goto out_unlock; 2496 2497 dev_cg = &dev->dev_group; 2498 2499 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2500 GFP_KERNEL); 2501 if (!dev_cg->default_groups) 2502 goto out_free_device; 2503 2504 config_group_init_type_name(dev_cg, name, &target_core_dev_cit); 2505 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2506 &target_core_dev_attrib_cit); 2507 config_group_init_type_name(&dev->dev_pr_group, "pr", 2508 &target_core_dev_pr_cit); 2509 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2510 &target_core_dev_wwn_cit); 2511 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2512 "alua", &target_core_alua_tg_pt_gps_cit); 2513 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2514 "statistics", &target_core_stat_cit); 2515 2516 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2517 dev_cg->default_groups[1] = &dev->dev_pr_group; 2518 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2519 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2520 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2521 dev_cg->default_groups[5] = NULL; 2522 /* 2523 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2524 */ 2525 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2526 if (!tg_pt_gp) 2527 goto out_free_dev_cg_default_groups; 2528 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2529 2530 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2531 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2532 GFP_KERNEL); 2533 if (!tg_pt_gp_cg->default_groups) { 2534 pr_err("Unable to allocate tg_pt_gp_cg->" 2535 "default_groups\n"); 2536 goto out_free_tg_pt_gp; 2537 } 2538 2539 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2540 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2541 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2542 tg_pt_gp_cg->default_groups[1] = NULL; 2543 /* 2544 * Add core/$HBA/$DEV/statistics/ default groups 2545 */ 2546 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2547 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2548 GFP_KERNEL); 2549 if (!dev_stat_grp->default_groups) { 2550 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2551 goto out_free_tg_pt_gp_cg_default_groups; 2552 } 2553 target_stat_setup_dev_default_groups(dev); 2554 2555 mutex_unlock(&hba->hba_access_mutex); 2556 return dev_cg; 2557 2558 out_free_tg_pt_gp_cg_default_groups: 2559 kfree(tg_pt_gp_cg->default_groups); 2560 out_free_tg_pt_gp: 2561 core_alua_free_tg_pt_gp(tg_pt_gp); 2562 out_free_dev_cg_default_groups: 2563 kfree(dev_cg->default_groups); 2564 out_free_device: 2565 target_free_device(dev); 2566 out_unlock: 2567 mutex_unlock(&hba->hba_access_mutex); 2568 return ERR_PTR(errno); 2569 } 2570 2571 static void target_core_drop_subdev( 2572 struct config_group *group, 2573 struct config_item *item) 2574 { 2575 struct config_group *dev_cg = to_config_group(item); 2576 struct se_device *dev = 2577 container_of(dev_cg, struct se_device, dev_group); 2578 struct se_hba *hba; 2579 struct config_item *df_item; 2580 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2581 int i; 2582 2583 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2584 2585 mutex_lock(&hba->hba_access_mutex); 2586 2587 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2588 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2589 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2590 dev_stat_grp->default_groups[i] = NULL; 2591 config_item_put(df_item); 2592 } 2593 kfree(dev_stat_grp->default_groups); 2594 2595 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2596 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2597 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2598 tg_pt_gp_cg->default_groups[i] = NULL; 2599 config_item_put(df_item); 2600 } 2601 kfree(tg_pt_gp_cg->default_groups); 2602 /* 2603 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2604 * directly from target_core_alua_tg_pt_gp_release(). 2605 */ 2606 dev->t10_alua.default_tg_pt_gp = NULL; 2607 2608 for (i = 0; dev_cg->default_groups[i]; i++) { 2609 df_item = &dev_cg->default_groups[i]->cg_item; 2610 dev_cg->default_groups[i] = NULL; 2611 config_item_put(df_item); 2612 } 2613 /* 2614 * se_dev is released from target_core_dev_item_ops->release() 2615 */ 2616 config_item_put(item); 2617 mutex_unlock(&hba->hba_access_mutex); 2618 } 2619 2620 static struct configfs_group_operations target_core_hba_group_ops = { 2621 .make_group = target_core_make_subdev, 2622 .drop_item = target_core_drop_subdev, 2623 }; 2624 2625 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2626 #define SE_HBA_ATTR(_name, _mode) \ 2627 static struct target_core_hba_attribute \ 2628 target_core_hba_##_name = \ 2629 __CONFIGFS_EATTR(_name, _mode, \ 2630 target_core_hba_show_attr_##_name, \ 2631 target_core_hba_store_attr_##_name); 2632 2633 #define SE_HBA_ATTR_RO(_name) \ 2634 static struct target_core_hba_attribute \ 2635 target_core_hba_##_name = \ 2636 __CONFIGFS_EATTR_RO(_name, \ 2637 target_core_hba_show_attr_##_name); 2638 2639 static ssize_t target_core_hba_show_attr_hba_info( 2640 struct se_hba *hba, 2641 char *page) 2642 { 2643 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2644 hba->hba_id, hba->transport->name, 2645 TARGET_CORE_CONFIGFS_VERSION); 2646 } 2647 2648 SE_HBA_ATTR_RO(hba_info); 2649 2650 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2651 char *page) 2652 { 2653 int hba_mode = 0; 2654 2655 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2656 hba_mode = 1; 2657 2658 return sprintf(page, "%d\n", hba_mode); 2659 } 2660 2661 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2662 const char *page, size_t count) 2663 { 2664 struct se_subsystem_api *transport = hba->transport; 2665 unsigned long mode_flag; 2666 int ret; 2667 2668 if (transport->pmode_enable_hba == NULL) 2669 return -EINVAL; 2670 2671 ret = strict_strtoul(page, 0, &mode_flag); 2672 if (ret < 0) { 2673 pr_err("Unable to extract hba mode flag: %d\n", ret); 2674 return -EINVAL; 2675 } 2676 2677 if (hba->dev_count) { 2678 pr_err("Unable to set hba_mode with active devices\n"); 2679 return -EINVAL; 2680 } 2681 2682 ret = transport->pmode_enable_hba(hba, mode_flag); 2683 if (ret < 0) 2684 return -EINVAL; 2685 if (ret > 0) 2686 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2687 else if (ret == 0) 2688 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2689 2690 return count; 2691 } 2692 2693 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2694 2695 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2696 2697 static void target_core_hba_release(struct config_item *item) 2698 { 2699 struct se_hba *hba = container_of(to_config_group(item), 2700 struct se_hba, hba_group); 2701 core_delete_hba(hba); 2702 } 2703 2704 static struct configfs_attribute *target_core_hba_attrs[] = { 2705 &target_core_hba_hba_info.attr, 2706 &target_core_hba_hba_mode.attr, 2707 NULL, 2708 }; 2709 2710 static struct configfs_item_operations target_core_hba_item_ops = { 2711 .release = target_core_hba_release, 2712 .show_attribute = target_core_hba_attr_show, 2713 .store_attribute = target_core_hba_attr_store, 2714 }; 2715 2716 static struct config_item_type target_core_hba_cit = { 2717 .ct_item_ops = &target_core_hba_item_ops, 2718 .ct_group_ops = &target_core_hba_group_ops, 2719 .ct_attrs = target_core_hba_attrs, 2720 .ct_owner = THIS_MODULE, 2721 }; 2722 2723 static struct config_group *target_core_call_addhbatotarget( 2724 struct config_group *group, 2725 const char *name) 2726 { 2727 char *se_plugin_str, *str, *str2; 2728 struct se_hba *hba; 2729 char buf[TARGET_CORE_NAME_MAX_LEN]; 2730 unsigned long plugin_dep_id = 0; 2731 int ret; 2732 2733 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 2734 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 2735 pr_err("Passed *name strlen(): %d exceeds" 2736 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 2737 TARGET_CORE_NAME_MAX_LEN); 2738 return ERR_PTR(-ENAMETOOLONG); 2739 } 2740 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 2741 2742 str = strstr(buf, "_"); 2743 if (!str) { 2744 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 2745 return ERR_PTR(-EINVAL); 2746 } 2747 se_plugin_str = buf; 2748 /* 2749 * Special case for subsystem plugins that have "_" in their names. 2750 * Namely rd_direct and rd_mcp.. 2751 */ 2752 str2 = strstr(str+1, "_"); 2753 if (str2) { 2754 *str2 = '\0'; /* Terminate for *se_plugin_str */ 2755 str2++; /* Skip to start of plugin dependent ID */ 2756 str = str2; 2757 } else { 2758 *str = '\0'; /* Terminate for *se_plugin_str */ 2759 str++; /* Skip to start of plugin dependent ID */ 2760 } 2761 2762 ret = strict_strtoul(str, 0, &plugin_dep_id); 2763 if (ret < 0) { 2764 pr_err("strict_strtoul() returned %d for" 2765 " plugin_dep_id\n", ret); 2766 return ERR_PTR(-EINVAL); 2767 } 2768 /* 2769 * Load up TCM subsystem plugins if they have not already been loaded. 2770 */ 2771 transport_subsystem_check_init(); 2772 2773 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 2774 if (IS_ERR(hba)) 2775 return ERR_CAST(hba); 2776 2777 config_group_init_type_name(&hba->hba_group, name, 2778 &target_core_hba_cit); 2779 2780 return &hba->hba_group; 2781 } 2782 2783 static void target_core_call_delhbafromtarget( 2784 struct config_group *group, 2785 struct config_item *item) 2786 { 2787 /* 2788 * core_delete_hba() is called from target_core_hba_item_ops->release() 2789 * -> target_core_hba_release() 2790 */ 2791 config_item_put(item); 2792 } 2793 2794 static struct configfs_group_operations target_core_group_ops = { 2795 .make_group = target_core_call_addhbatotarget, 2796 .drop_item = target_core_call_delhbafromtarget, 2797 }; 2798 2799 static struct config_item_type target_core_cit = { 2800 .ct_item_ops = NULL, 2801 .ct_group_ops = &target_core_group_ops, 2802 .ct_attrs = NULL, 2803 .ct_owner = THIS_MODULE, 2804 }; 2805 2806 /* Stop functions for struct config_item_type target_core_hba_cit */ 2807 2808 static int __init target_core_init_configfs(void) 2809 { 2810 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 2811 struct config_group *lu_gp_cg = NULL; 2812 struct configfs_subsystem *subsys; 2813 struct t10_alua_lu_gp *lu_gp; 2814 int ret; 2815 2816 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 2817 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 2818 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 2819 2820 subsys = target_core_subsystem[0]; 2821 config_group_init(&subsys->su_group); 2822 mutex_init(&subsys->su_mutex); 2823 2824 ret = init_se_kmem_caches(); 2825 if (ret < 0) 2826 return ret; 2827 /* 2828 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 2829 * and ALUA Logical Unit Group and Target Port Group infrastructure. 2830 */ 2831 target_cg = &subsys->su_group; 2832 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2, 2833 GFP_KERNEL); 2834 if (!target_cg->default_groups) { 2835 pr_err("Unable to allocate target_cg->default_groups\n"); 2836 ret = -ENOMEM; 2837 goto out_global; 2838 } 2839 2840 config_group_init_type_name(&target_core_hbagroup, 2841 "core", &target_core_cit); 2842 target_cg->default_groups[0] = &target_core_hbagroup; 2843 target_cg->default_groups[1] = NULL; 2844 /* 2845 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 2846 */ 2847 hba_cg = &target_core_hbagroup; 2848 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2849 GFP_KERNEL); 2850 if (!hba_cg->default_groups) { 2851 pr_err("Unable to allocate hba_cg->default_groups\n"); 2852 ret = -ENOMEM; 2853 goto out_global; 2854 } 2855 config_group_init_type_name(&alua_group, 2856 "alua", &target_core_alua_cit); 2857 hba_cg->default_groups[0] = &alua_group; 2858 hba_cg->default_groups[1] = NULL; 2859 /* 2860 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 2861 * groups under /sys/kernel/config/target/core/alua/ 2862 */ 2863 alua_cg = &alua_group; 2864 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2865 GFP_KERNEL); 2866 if (!alua_cg->default_groups) { 2867 pr_err("Unable to allocate alua_cg->default_groups\n"); 2868 ret = -ENOMEM; 2869 goto out_global; 2870 } 2871 2872 config_group_init_type_name(&alua_lu_gps_group, 2873 "lu_gps", &target_core_alua_lu_gps_cit); 2874 alua_cg->default_groups[0] = &alua_lu_gps_group; 2875 alua_cg->default_groups[1] = NULL; 2876 /* 2877 * Add core/alua/lu_gps/default_lu_gp 2878 */ 2879 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 2880 if (IS_ERR(lu_gp)) { 2881 ret = -ENOMEM; 2882 goto out_global; 2883 } 2884 2885 lu_gp_cg = &alua_lu_gps_group; 2886 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2887 GFP_KERNEL); 2888 if (!lu_gp_cg->default_groups) { 2889 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 2890 ret = -ENOMEM; 2891 goto out_global; 2892 } 2893 2894 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 2895 &target_core_alua_lu_gp_cit); 2896 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 2897 lu_gp_cg->default_groups[1] = NULL; 2898 default_lu_gp = lu_gp; 2899 /* 2900 * Register the target_core_mod subsystem with configfs. 2901 */ 2902 ret = configfs_register_subsystem(subsys); 2903 if (ret < 0) { 2904 pr_err("Error %d while registering subsystem %s\n", 2905 ret, subsys->su_group.cg_item.ci_namebuf); 2906 goto out_global; 2907 } 2908 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 2909 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 2910 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 2911 /* 2912 * Register built-in RAMDISK subsystem logic for virtual LUN 0 2913 */ 2914 ret = rd_module_init(); 2915 if (ret < 0) 2916 goto out; 2917 2918 ret = core_dev_setup_virtual_lun0(); 2919 if (ret < 0) 2920 goto out; 2921 2922 return 0; 2923 2924 out: 2925 configfs_unregister_subsystem(subsys); 2926 core_dev_release_virtual_lun0(); 2927 rd_module_exit(); 2928 out_global: 2929 if (default_lu_gp) { 2930 core_alua_free_lu_gp(default_lu_gp); 2931 default_lu_gp = NULL; 2932 } 2933 if (lu_gp_cg) 2934 kfree(lu_gp_cg->default_groups); 2935 if (alua_cg) 2936 kfree(alua_cg->default_groups); 2937 if (hba_cg) 2938 kfree(hba_cg->default_groups); 2939 kfree(target_cg->default_groups); 2940 release_se_kmem_caches(); 2941 return ret; 2942 } 2943 2944 static void __exit target_core_exit_configfs(void) 2945 { 2946 struct configfs_subsystem *subsys; 2947 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 2948 struct config_item *item; 2949 int i; 2950 2951 subsys = target_core_subsystem[0]; 2952 2953 lu_gp_cg = &alua_lu_gps_group; 2954 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 2955 item = &lu_gp_cg->default_groups[i]->cg_item; 2956 lu_gp_cg->default_groups[i] = NULL; 2957 config_item_put(item); 2958 } 2959 kfree(lu_gp_cg->default_groups); 2960 lu_gp_cg->default_groups = NULL; 2961 2962 alua_cg = &alua_group; 2963 for (i = 0; alua_cg->default_groups[i]; i++) { 2964 item = &alua_cg->default_groups[i]->cg_item; 2965 alua_cg->default_groups[i] = NULL; 2966 config_item_put(item); 2967 } 2968 kfree(alua_cg->default_groups); 2969 alua_cg->default_groups = NULL; 2970 2971 hba_cg = &target_core_hbagroup; 2972 for (i = 0; hba_cg->default_groups[i]; i++) { 2973 item = &hba_cg->default_groups[i]->cg_item; 2974 hba_cg->default_groups[i] = NULL; 2975 config_item_put(item); 2976 } 2977 kfree(hba_cg->default_groups); 2978 hba_cg->default_groups = NULL; 2979 /* 2980 * We expect subsys->su_group.default_groups to be released 2981 * by configfs subsystem provider logic.. 2982 */ 2983 configfs_unregister_subsystem(subsys); 2984 kfree(subsys->su_group.default_groups); 2985 2986 core_alua_free_lu_gp(default_lu_gp); 2987 default_lu_gp = NULL; 2988 2989 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 2990 " Infrastructure\n"); 2991 2992 core_dev_release_virtual_lun0(); 2993 rd_module_exit(); 2994 release_se_kmem_caches(); 2995 } 2996 2997 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 2998 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 2999 MODULE_LICENSE("GPL"); 3000 3001 module_init(target_core_init_configfs); 3002 module_exit(target_core_exit_configfs); 3003