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 * Below are some hardcoded request_module() calls to automatically 131 * local fabric modules when the following is called: 132 * 133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 134 * 135 * Note that this does not limit which TCM fabric module can be 136 * registered, but simply provids auto loading logic for modules with 137 * mkdir(2) system calls with known TCM fabric modules. 138 */ 139 if (!strncmp(name, "iscsi", 5)) { 140 /* 141 * Automatically load the LIO Target fabric module when the 142 * following is called: 143 * 144 * mkdir -p $CONFIGFS/target/iscsi 145 */ 146 ret = request_module("iscsi_target_mod"); 147 if (ret < 0) { 148 pr_err("request_module() failed for" 149 " iscsi_target_mod.ko: %d\n", ret); 150 return ERR_PTR(-EINVAL); 151 } 152 } else if (!strncmp(name, "loopback", 8)) { 153 /* 154 * Automatically load the tcm_loop fabric module when the 155 * following is called: 156 * 157 * mkdir -p $CONFIGFS/target/loopback 158 */ 159 ret = request_module("tcm_loop"); 160 if (ret < 0) { 161 pr_err("request_module() failed for" 162 " tcm_loop.ko: %d\n", ret); 163 return ERR_PTR(-EINVAL); 164 } 165 } 166 167 tf = target_core_get_fabric(name); 168 if (!tf) { 169 pr_err("target_core_get_fabric() failed for %s\n", 170 name); 171 return ERR_PTR(-EINVAL); 172 } 173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 174 " %s\n", tf->tf_name); 175 /* 176 * On a successful target_core_get_fabric() look, the returned 177 * struct target_fabric_configfs *tf will contain a usage reference. 178 */ 179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 180 &tf->tf_cit_tmpl.tfc_wwn_cit); 181 182 tf->tf_group.default_groups = tf->tf_default_groups; 183 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 184 tf->tf_group.default_groups[1] = NULL; 185 186 config_group_init_type_name(&tf->tf_group, name, 187 &tf->tf_cit_tmpl.tfc_wwn_cit); 188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 189 &tf->tf_cit_tmpl.tfc_discovery_cit); 190 191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 192 " %s\n", tf->tf_group.cg_item.ci_name); 193 /* 194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 195 */ 196 tf->tf_ops.tf_subsys = tf->tf_subsys; 197 tf->tf_fabric = &tf->tf_group.cg_item; 198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 199 " for %s\n", name); 200 201 return &tf->tf_group; 202 } 203 204 /* 205 * Called from struct target_core_group_ops->drop_item() 206 */ 207 static void target_core_deregister_fabric( 208 struct config_group *group, 209 struct config_item *item) 210 { 211 struct target_fabric_configfs *tf = container_of( 212 to_config_group(item), struct target_fabric_configfs, tf_group); 213 struct config_group *tf_group; 214 struct config_item *df_item; 215 int i; 216 217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 218 " tf list\n", config_item_name(item)); 219 220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 221 " %s\n", tf->tf_name); 222 atomic_dec(&tf->tf_access_cnt); 223 224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 225 " tf->tf_fabric for %s\n", tf->tf_name); 226 tf->tf_fabric = NULL; 227 228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 229 " %s\n", config_item_name(item)); 230 231 tf_group = &tf->tf_group; 232 for (i = 0; tf_group->default_groups[i]; i++) { 233 df_item = &tf_group->default_groups[i]->cg_item; 234 tf_group->default_groups[i] = NULL; 235 config_item_put(df_item); 236 } 237 config_item_put(item); 238 } 239 240 static struct configfs_group_operations target_core_fabric_group_ops = { 241 .make_group = &target_core_register_fabric, 242 .drop_item = &target_core_deregister_fabric, 243 }; 244 245 /* 246 * All item attributes appearing in /sys/kernel/target/ appear here. 247 */ 248 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 249 &target_core_item_attr_version, 250 NULL, 251 }; 252 253 /* 254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 255 */ 256 static struct config_item_type target_core_fabrics_item = { 257 .ct_item_ops = &target_core_fabric_item_ops, 258 .ct_group_ops = &target_core_fabric_group_ops, 259 .ct_attrs = target_core_fabric_item_attrs, 260 .ct_owner = THIS_MODULE, 261 }; 262 263 static struct configfs_subsystem target_core_fabrics = { 264 .su_group = { 265 .cg_item = { 266 .ci_namebuf = "target", 267 .ci_type = &target_core_fabrics_item, 268 }, 269 }, 270 }; 271 272 struct configfs_subsystem *target_core_subsystem[] = { 273 &target_core_fabrics, 274 NULL, 275 }; 276 277 /*############################################################################## 278 // Start functions called by external Target Fabrics Modules 279 //############################################################################*/ 280 281 /* 282 * First function called by fabric modules to: 283 * 284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 285 * 2) Add struct target_fabric_configfs to g_tf_list 286 * 3) Return struct target_fabric_configfs to fabric module to be passed 287 * into target_fabric_configfs_register(). 288 */ 289 struct target_fabric_configfs *target_fabric_configfs_init( 290 struct module *fabric_mod, 291 const char *name) 292 { 293 struct target_fabric_configfs *tf; 294 295 if (!(name)) { 296 pr_err("Unable to locate passed fabric name\n"); 297 return ERR_PTR(-EINVAL); 298 } 299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 300 pr_err("Passed name: %s exceeds TARGET_FABRIC" 301 "_NAME_SIZE\n", name); 302 return ERR_PTR(-EINVAL); 303 } 304 305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 306 if (!tf) 307 return ERR_PTR(-ENOMEM); 308 309 INIT_LIST_HEAD(&tf->tf_list); 310 atomic_set(&tf->tf_access_cnt, 0); 311 /* 312 * Setup the default generic struct config_item_type's (cits) in 313 * struct target_fabric_configfs->tf_cit_tmpl 314 */ 315 tf->tf_module = fabric_mod; 316 target_fabric_setup_cits(tf); 317 318 tf->tf_subsys = target_core_subsystem[0]; 319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 320 321 mutex_lock(&g_tf_lock); 322 list_add_tail(&tf->tf_list, &g_tf_list); 323 mutex_unlock(&g_tf_lock); 324 325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 326 ">>>>>>>>>>>>>>\n"); 327 pr_debug("Initialized struct target_fabric_configfs: %p for" 328 " %s\n", tf, tf->tf_name); 329 return tf; 330 } 331 EXPORT_SYMBOL(target_fabric_configfs_init); 332 333 /* 334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 335 */ 336 void target_fabric_configfs_free( 337 struct target_fabric_configfs *tf) 338 { 339 mutex_lock(&g_tf_lock); 340 list_del(&tf->tf_list); 341 mutex_unlock(&g_tf_lock); 342 343 kfree(tf); 344 } 345 EXPORT_SYMBOL(target_fabric_configfs_free); 346 347 /* 348 * Perform a sanity check of the passed tf->tf_ops before completing 349 * TCM fabric module registration. 350 */ 351 static int target_fabric_tf_ops_check( 352 struct target_fabric_configfs *tf) 353 { 354 struct target_core_fabric_ops *tfo = &tf->tf_ops; 355 356 if (!tfo->get_fabric_name) { 357 pr_err("Missing tfo->get_fabric_name()\n"); 358 return -EINVAL; 359 } 360 if (!tfo->get_fabric_proto_ident) { 361 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_get_wwn) { 365 pr_err("Missing tfo->tpg_get_wwn()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_get_tag) { 369 pr_err("Missing tfo->tpg_get_tag()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_get_default_depth) { 373 pr_err("Missing tfo->tpg_get_default_depth()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_get_pr_transport_id) { 377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_pr_transport_id_len) { 381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->tpg_check_demo_mode) { 385 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->tpg_check_demo_mode_cache) { 389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->tpg_check_demo_mode_write_protect) { 393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->tpg_check_prod_mode_write_protect) { 397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->tpg_alloc_fabric_acl) { 401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->tpg_release_fabric_acl) { 405 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->tpg_get_inst_index) { 409 pr_err("Missing tfo->tpg_get_inst_index()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->release_cmd) { 413 pr_err("Missing tfo->release_cmd()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->shutdown_session) { 417 pr_err("Missing tfo->shutdown_session()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->close_session) { 421 pr_err("Missing tfo->close_session()\n"); 422 return -EINVAL; 423 } 424 if (!tfo->sess_get_index) { 425 pr_err("Missing tfo->sess_get_index()\n"); 426 return -EINVAL; 427 } 428 if (!tfo->write_pending) { 429 pr_err("Missing tfo->write_pending()\n"); 430 return -EINVAL; 431 } 432 if (!tfo->write_pending_status) { 433 pr_err("Missing tfo->write_pending_status()\n"); 434 return -EINVAL; 435 } 436 if (!tfo->set_default_node_attributes) { 437 pr_err("Missing tfo->set_default_node_attributes()\n"); 438 return -EINVAL; 439 } 440 if (!tfo->get_task_tag) { 441 pr_err("Missing tfo->get_task_tag()\n"); 442 return -EINVAL; 443 } 444 if (!tfo->get_cmd_state) { 445 pr_err("Missing tfo->get_cmd_state()\n"); 446 return -EINVAL; 447 } 448 if (!tfo->queue_data_in) { 449 pr_err("Missing tfo->queue_data_in()\n"); 450 return -EINVAL; 451 } 452 if (!tfo->queue_status) { 453 pr_err("Missing tfo->queue_status()\n"); 454 return -EINVAL; 455 } 456 if (!tfo->queue_tm_rsp) { 457 pr_err("Missing tfo->queue_tm_rsp()\n"); 458 return -EINVAL; 459 } 460 if (!tfo->aborted_task) { 461 pr_err("Missing tfo->aborted_task()\n"); 462 return -EINVAL; 463 } 464 /* 465 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 466 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 467 * target_core_fabric_configfs.c WWN+TPG group context code. 468 */ 469 if (!tfo->fabric_make_wwn) { 470 pr_err("Missing tfo->fabric_make_wwn()\n"); 471 return -EINVAL; 472 } 473 if (!tfo->fabric_drop_wwn) { 474 pr_err("Missing tfo->fabric_drop_wwn()\n"); 475 return -EINVAL; 476 } 477 if (!tfo->fabric_make_tpg) { 478 pr_err("Missing tfo->fabric_make_tpg()\n"); 479 return -EINVAL; 480 } 481 if (!tfo->fabric_drop_tpg) { 482 pr_err("Missing tfo->fabric_drop_tpg()\n"); 483 return -EINVAL; 484 } 485 486 return 0; 487 } 488 489 /* 490 * Called 2nd from fabric module with returned parameter of 491 * struct target_fabric_configfs * from target_fabric_configfs_init(). 492 * 493 * Upon a successful registration, the new fabric's struct config_item is 494 * return. Also, a pointer to this struct is set in the passed 495 * struct target_fabric_configfs. 496 */ 497 int target_fabric_configfs_register( 498 struct target_fabric_configfs *tf) 499 { 500 int ret; 501 502 if (!tf) { 503 pr_err("Unable to locate target_fabric_configfs" 504 " pointer\n"); 505 return -EINVAL; 506 } 507 if (!tf->tf_subsys) { 508 pr_err("Unable to target struct config_subsystem" 509 " pointer\n"); 510 return -EINVAL; 511 } 512 ret = target_fabric_tf_ops_check(tf); 513 if (ret < 0) 514 return ret; 515 516 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 517 ">>>>>>>>>>\n"); 518 return 0; 519 } 520 EXPORT_SYMBOL(target_fabric_configfs_register); 521 522 void target_fabric_configfs_deregister( 523 struct target_fabric_configfs *tf) 524 { 525 struct configfs_subsystem *su; 526 527 if (!tf) { 528 pr_err("Unable to locate passed target_fabric_" 529 "configfs\n"); 530 return; 531 } 532 su = tf->tf_subsys; 533 if (!su) { 534 pr_err("Unable to locate passed tf->tf_subsys" 535 " pointer\n"); 536 return; 537 } 538 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 539 ">>>>>>>>>>>>\n"); 540 mutex_lock(&g_tf_lock); 541 if (atomic_read(&tf->tf_access_cnt)) { 542 mutex_unlock(&g_tf_lock); 543 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 544 tf->tf_name); 545 BUG(); 546 } 547 list_del(&tf->tf_list); 548 mutex_unlock(&g_tf_lock); 549 550 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 551 " %s\n", tf->tf_name); 552 tf->tf_module = NULL; 553 tf->tf_subsys = NULL; 554 kfree(tf); 555 556 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 557 ">>>>>\n"); 558 } 559 EXPORT_SYMBOL(target_fabric_configfs_deregister); 560 561 /*############################################################################## 562 // Stop functions called by external Target Fabrics Modules 563 //############################################################################*/ 564 565 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 566 567 #define DEF_DEV_ATTRIB_SHOW(_name) \ 568 static ssize_t target_core_dev_show_attr_##_name( \ 569 struct se_dev_attrib *da, \ 570 char *page) \ 571 { \ 572 return snprintf(page, PAGE_SIZE, "%u\n", \ 573 (u32)da->da_dev->dev_attrib._name); \ 574 } 575 576 #define DEF_DEV_ATTRIB_STORE(_name) \ 577 static ssize_t target_core_dev_store_attr_##_name( \ 578 struct se_dev_attrib *da, \ 579 const char *page, \ 580 size_t count) \ 581 { \ 582 unsigned long val; \ 583 int ret; \ 584 \ 585 ret = kstrtoul(page, 0, &val); \ 586 if (ret < 0) { \ 587 pr_err("kstrtoul() failed with" \ 588 " ret: %d\n", ret); \ 589 return -EINVAL; \ 590 } \ 591 ret = se_dev_set_##_name(da->da_dev, (u32)val); \ 592 \ 593 return (!ret) ? count : -EINVAL; \ 594 } 595 596 #define DEF_DEV_ATTRIB(_name) \ 597 DEF_DEV_ATTRIB_SHOW(_name); \ 598 DEF_DEV_ATTRIB_STORE(_name); 599 600 #define DEF_DEV_ATTRIB_RO(_name) \ 601 DEF_DEV_ATTRIB_SHOW(_name); 602 603 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 604 #define SE_DEV_ATTR(_name, _mode) \ 605 static struct target_core_dev_attrib_attribute \ 606 target_core_dev_attrib_##_name = \ 607 __CONFIGFS_EATTR(_name, _mode, \ 608 target_core_dev_show_attr_##_name, \ 609 target_core_dev_store_attr_##_name); 610 611 #define SE_DEV_ATTR_RO(_name); \ 612 static struct target_core_dev_attrib_attribute \ 613 target_core_dev_attrib_##_name = \ 614 __CONFIGFS_EATTR_RO(_name, \ 615 target_core_dev_show_attr_##_name); 616 617 DEF_DEV_ATTRIB(emulate_model_alias); 618 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR); 619 620 DEF_DEV_ATTRIB(emulate_dpo); 621 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 622 623 DEF_DEV_ATTRIB(emulate_fua_write); 624 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 625 626 DEF_DEV_ATTRIB(emulate_fua_read); 627 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 628 629 DEF_DEV_ATTRIB(emulate_write_cache); 630 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 631 632 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 633 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 634 635 DEF_DEV_ATTRIB(emulate_tas); 636 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 637 638 DEF_DEV_ATTRIB(emulate_tpu); 639 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 640 641 DEF_DEV_ATTRIB(emulate_tpws); 642 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 643 644 DEF_DEV_ATTRIB(emulate_caw); 645 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR); 646 647 DEF_DEV_ATTRIB(emulate_3pc); 648 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR); 649 650 DEF_DEV_ATTRIB(pi_prot_type); 651 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR); 652 653 DEF_DEV_ATTRIB_RO(hw_pi_prot_type); 654 SE_DEV_ATTR_RO(hw_pi_prot_type); 655 656 DEF_DEV_ATTRIB(pi_prot_format); 657 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR); 658 659 DEF_DEV_ATTRIB(enforce_pr_isids); 660 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 661 662 DEF_DEV_ATTRIB(is_nonrot); 663 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 664 665 DEF_DEV_ATTRIB(emulate_rest_reord); 666 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 667 668 DEF_DEV_ATTRIB(force_pr_aptpl); 669 SE_DEV_ATTR(force_pr_aptpl, S_IRUGO | S_IWUSR); 670 671 DEF_DEV_ATTRIB_RO(hw_block_size); 672 SE_DEV_ATTR_RO(hw_block_size); 673 674 DEF_DEV_ATTRIB(block_size); 675 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 676 677 DEF_DEV_ATTRIB_RO(hw_max_sectors); 678 SE_DEV_ATTR_RO(hw_max_sectors); 679 680 DEF_DEV_ATTRIB(fabric_max_sectors); 681 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR); 682 683 DEF_DEV_ATTRIB(optimal_sectors); 684 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 685 686 DEF_DEV_ATTRIB_RO(hw_queue_depth); 687 SE_DEV_ATTR_RO(hw_queue_depth); 688 689 DEF_DEV_ATTRIB(queue_depth); 690 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 691 692 DEF_DEV_ATTRIB(max_unmap_lba_count); 693 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 694 695 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 696 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 697 698 DEF_DEV_ATTRIB(unmap_granularity); 699 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 700 701 DEF_DEV_ATTRIB(unmap_granularity_alignment); 702 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 703 704 DEF_DEV_ATTRIB(max_write_same_len); 705 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR); 706 707 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 708 709 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 710 &target_core_dev_attrib_emulate_model_alias.attr, 711 &target_core_dev_attrib_emulate_dpo.attr, 712 &target_core_dev_attrib_emulate_fua_write.attr, 713 &target_core_dev_attrib_emulate_fua_read.attr, 714 &target_core_dev_attrib_emulate_write_cache.attr, 715 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 716 &target_core_dev_attrib_emulate_tas.attr, 717 &target_core_dev_attrib_emulate_tpu.attr, 718 &target_core_dev_attrib_emulate_tpws.attr, 719 &target_core_dev_attrib_emulate_caw.attr, 720 &target_core_dev_attrib_emulate_3pc.attr, 721 &target_core_dev_attrib_pi_prot_type.attr, 722 &target_core_dev_attrib_hw_pi_prot_type.attr, 723 &target_core_dev_attrib_pi_prot_format.attr, 724 &target_core_dev_attrib_enforce_pr_isids.attr, 725 &target_core_dev_attrib_force_pr_aptpl.attr, 726 &target_core_dev_attrib_is_nonrot.attr, 727 &target_core_dev_attrib_emulate_rest_reord.attr, 728 &target_core_dev_attrib_hw_block_size.attr, 729 &target_core_dev_attrib_block_size.attr, 730 &target_core_dev_attrib_hw_max_sectors.attr, 731 &target_core_dev_attrib_fabric_max_sectors.attr, 732 &target_core_dev_attrib_optimal_sectors.attr, 733 &target_core_dev_attrib_hw_queue_depth.attr, 734 &target_core_dev_attrib_queue_depth.attr, 735 &target_core_dev_attrib_max_unmap_lba_count.attr, 736 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 737 &target_core_dev_attrib_unmap_granularity.attr, 738 &target_core_dev_attrib_unmap_granularity_alignment.attr, 739 &target_core_dev_attrib_max_write_same_len.attr, 740 NULL, 741 }; 742 743 static struct configfs_item_operations target_core_dev_attrib_ops = { 744 .show_attribute = target_core_dev_attrib_attr_show, 745 .store_attribute = target_core_dev_attrib_attr_store, 746 }; 747 748 static struct config_item_type target_core_dev_attrib_cit = { 749 .ct_item_ops = &target_core_dev_attrib_ops, 750 .ct_attrs = target_core_dev_attrib_attrs, 751 .ct_owner = THIS_MODULE, 752 }; 753 754 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 755 756 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 757 758 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 759 #define SE_DEV_WWN_ATTR(_name, _mode) \ 760 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 761 __CONFIGFS_EATTR(_name, _mode, \ 762 target_core_dev_wwn_show_attr_##_name, \ 763 target_core_dev_wwn_store_attr_##_name); 764 765 #define SE_DEV_WWN_ATTR_RO(_name); \ 766 do { \ 767 static struct target_core_dev_wwn_attribute \ 768 target_core_dev_wwn_##_name = \ 769 __CONFIGFS_EATTR_RO(_name, \ 770 target_core_dev_wwn_show_attr_##_name); \ 771 } while (0); 772 773 /* 774 * VPD page 0x80 Unit serial 775 */ 776 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 777 struct t10_wwn *t10_wwn, 778 char *page) 779 { 780 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 781 &t10_wwn->unit_serial[0]); 782 } 783 784 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 785 struct t10_wwn *t10_wwn, 786 const char *page, 787 size_t count) 788 { 789 struct se_device *dev = t10_wwn->t10_dev; 790 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 791 792 /* 793 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 794 * from the struct scsi_device level firmware, do not allow 795 * VPD Unit Serial to be emulated. 796 * 797 * Note this struct scsi_device could also be emulating VPD 798 * information from its drivers/scsi LLD. But for now we assume 799 * it is doing 'the right thing' wrt a world wide unique 800 * VPD Unit Serial Number that OS dependent multipath can depend on. 801 */ 802 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 803 pr_err("Underlying SCSI device firmware provided VPD" 804 " Unit Serial, ignoring request\n"); 805 return -EOPNOTSUPP; 806 } 807 808 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 809 pr_err("Emulated VPD Unit Serial exceeds" 810 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 811 return -EOVERFLOW; 812 } 813 /* 814 * Check to see if any active $FABRIC_MOD exports exist. If they 815 * do exist, fail here as changing this information on the fly 816 * (underneath the initiator side OS dependent multipath code) 817 * could cause negative effects. 818 */ 819 if (dev->export_count) { 820 pr_err("Unable to set VPD Unit Serial while" 821 " active %d $FABRIC_MOD exports exist\n", 822 dev->export_count); 823 return -EINVAL; 824 } 825 826 /* 827 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 828 * 829 * Also, strip any newline added from the userspace 830 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 831 */ 832 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 833 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 834 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 835 "%s", strstrip(buf)); 836 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 837 838 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 839 " %s\n", dev->t10_wwn.unit_serial); 840 841 return count; 842 } 843 844 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 845 846 /* 847 * VPD page 0x83 Protocol Identifier 848 */ 849 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 850 struct t10_wwn *t10_wwn, 851 char *page) 852 { 853 struct t10_vpd *vpd; 854 unsigned char buf[VPD_TMP_BUF_SIZE]; 855 ssize_t len = 0; 856 857 memset(buf, 0, VPD_TMP_BUF_SIZE); 858 859 spin_lock(&t10_wwn->t10_vpd_lock); 860 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 861 if (!vpd->protocol_identifier_set) 862 continue; 863 864 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 865 866 if (len + strlen(buf) >= PAGE_SIZE) 867 break; 868 869 len += sprintf(page+len, "%s", buf); 870 } 871 spin_unlock(&t10_wwn->t10_vpd_lock); 872 873 return len; 874 } 875 876 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 877 struct t10_wwn *t10_wwn, 878 const char *page, 879 size_t count) 880 { 881 return -ENOSYS; 882 } 883 884 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 885 886 /* 887 * Generic wrapper for dumping VPD identifiers by association. 888 */ 889 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 890 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 891 struct t10_wwn *t10_wwn, \ 892 char *page) \ 893 { \ 894 struct t10_vpd *vpd; \ 895 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 896 ssize_t len = 0; \ 897 \ 898 spin_lock(&t10_wwn->t10_vpd_lock); \ 899 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 900 if (vpd->association != _assoc) \ 901 continue; \ 902 \ 903 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 904 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 905 if (len + strlen(buf) >= PAGE_SIZE) \ 906 break; \ 907 len += sprintf(page+len, "%s", buf); \ 908 \ 909 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 910 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 911 if (len + strlen(buf) >= PAGE_SIZE) \ 912 break; \ 913 len += sprintf(page+len, "%s", buf); \ 914 \ 915 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 916 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 917 if (len + strlen(buf) >= PAGE_SIZE) \ 918 break; \ 919 len += sprintf(page+len, "%s", buf); \ 920 } \ 921 spin_unlock(&t10_wwn->t10_vpd_lock); \ 922 \ 923 return len; \ 924 } 925 926 /* 927 * VPD page 0x83 Association: Logical Unit 928 */ 929 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 930 931 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 932 struct t10_wwn *t10_wwn, 933 const char *page, 934 size_t count) 935 { 936 return -ENOSYS; 937 } 938 939 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 940 941 /* 942 * VPD page 0x83 Association: Target Port 943 */ 944 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 945 946 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 947 struct t10_wwn *t10_wwn, 948 const char *page, 949 size_t count) 950 { 951 return -ENOSYS; 952 } 953 954 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 955 956 /* 957 * VPD page 0x83 Association: SCSI Target Device 958 */ 959 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 960 961 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 962 struct t10_wwn *t10_wwn, 963 const char *page, 964 size_t count) 965 { 966 return -ENOSYS; 967 } 968 969 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 970 971 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 972 973 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 974 &target_core_dev_wwn_vpd_unit_serial.attr, 975 &target_core_dev_wwn_vpd_protocol_identifier.attr, 976 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 977 &target_core_dev_wwn_vpd_assoc_target_port.attr, 978 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 979 NULL, 980 }; 981 982 static struct configfs_item_operations target_core_dev_wwn_ops = { 983 .show_attribute = target_core_dev_wwn_attr_show, 984 .store_attribute = target_core_dev_wwn_attr_store, 985 }; 986 987 static struct config_item_type target_core_dev_wwn_cit = { 988 .ct_item_ops = &target_core_dev_wwn_ops, 989 .ct_attrs = target_core_dev_wwn_attrs, 990 .ct_owner = THIS_MODULE, 991 }; 992 993 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 994 995 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 996 997 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 998 #define SE_DEV_PR_ATTR(_name, _mode) \ 999 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1000 __CONFIGFS_EATTR(_name, _mode, \ 1001 target_core_dev_pr_show_attr_##_name, \ 1002 target_core_dev_pr_store_attr_##_name); 1003 1004 #define SE_DEV_PR_ATTR_RO(_name); \ 1005 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1006 __CONFIGFS_EATTR_RO(_name, \ 1007 target_core_dev_pr_show_attr_##_name); 1008 1009 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1010 char *page) 1011 { 1012 struct se_node_acl *se_nacl; 1013 struct t10_pr_registration *pr_reg; 1014 char i_buf[PR_REG_ISID_ID_LEN]; 1015 1016 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1017 1018 pr_reg = dev->dev_pr_res_holder; 1019 if (!pr_reg) 1020 return sprintf(page, "No SPC-3 Reservation holder\n"); 1021 1022 se_nacl = pr_reg->pr_reg_nacl; 1023 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1024 1025 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1026 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1027 se_nacl->initiatorname, i_buf); 1028 } 1029 1030 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1031 char *page) 1032 { 1033 struct se_node_acl *se_nacl; 1034 ssize_t len; 1035 1036 se_nacl = dev->dev_reserved_node_acl; 1037 if (se_nacl) { 1038 len = sprintf(page, 1039 "SPC-2 Reservation: %s Initiator: %s\n", 1040 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1041 se_nacl->initiatorname); 1042 } else { 1043 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1044 } 1045 return len; 1046 } 1047 1048 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 1049 char *page) 1050 { 1051 int ret; 1052 1053 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1054 return sprintf(page, "Passthrough\n"); 1055 1056 spin_lock(&dev->dev_reservation_lock); 1057 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1058 ret = target_core_dev_pr_show_spc2_res(dev, page); 1059 else 1060 ret = target_core_dev_pr_show_spc3_res(dev, page); 1061 spin_unlock(&dev->dev_reservation_lock); 1062 return ret; 1063 } 1064 1065 SE_DEV_PR_ATTR_RO(res_holder); 1066 1067 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1068 struct se_device *dev, char *page) 1069 { 1070 ssize_t len = 0; 1071 1072 spin_lock(&dev->dev_reservation_lock); 1073 if (!dev->dev_pr_res_holder) { 1074 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1075 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1076 len = sprintf(page, "SPC-3 Reservation: All Target" 1077 " Ports registration\n"); 1078 } else { 1079 len = sprintf(page, "SPC-3 Reservation: Single" 1080 " Target Port registration\n"); 1081 } 1082 1083 spin_unlock(&dev->dev_reservation_lock); 1084 return len; 1085 } 1086 1087 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1088 1089 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1090 struct se_device *dev, char *page) 1091 { 1092 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 1093 } 1094 1095 SE_DEV_PR_ATTR_RO(res_pr_generation); 1096 1097 /* 1098 * res_pr_holder_tg_port 1099 */ 1100 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1101 struct se_device *dev, char *page) 1102 { 1103 struct se_node_acl *se_nacl; 1104 struct se_lun *lun; 1105 struct se_portal_group *se_tpg; 1106 struct t10_pr_registration *pr_reg; 1107 struct target_core_fabric_ops *tfo; 1108 ssize_t len = 0; 1109 1110 spin_lock(&dev->dev_reservation_lock); 1111 pr_reg = dev->dev_pr_res_holder; 1112 if (!pr_reg) { 1113 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1114 goto out_unlock; 1115 } 1116 1117 se_nacl = pr_reg->pr_reg_nacl; 1118 se_tpg = se_nacl->se_tpg; 1119 lun = pr_reg->pr_reg_tg_pt_lun; 1120 tfo = se_tpg->se_tpg_tfo; 1121 1122 len += sprintf(page+len, "SPC-3 Reservation: %s" 1123 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1124 tfo->tpg_get_wwn(se_tpg)); 1125 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1126 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1127 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1128 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1129 tfo->get_fabric_name(), lun->unpacked_lun); 1130 1131 out_unlock: 1132 spin_unlock(&dev->dev_reservation_lock); 1133 return len; 1134 } 1135 1136 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1137 1138 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1139 struct se_device *dev, char *page) 1140 { 1141 struct target_core_fabric_ops *tfo; 1142 struct t10_pr_registration *pr_reg; 1143 unsigned char buf[384]; 1144 char i_buf[PR_REG_ISID_ID_LEN]; 1145 ssize_t len = 0; 1146 int reg_count = 0; 1147 1148 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1149 1150 spin_lock(&dev->t10_pr.registration_lock); 1151 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1152 pr_reg_list) { 1153 1154 memset(buf, 0, 384); 1155 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1156 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1157 core_pr_dump_initiator_port(pr_reg, i_buf, 1158 PR_REG_ISID_ID_LEN); 1159 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1160 tfo->get_fabric_name(), 1161 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1162 pr_reg->pr_res_generation); 1163 1164 if (len + strlen(buf) >= PAGE_SIZE) 1165 break; 1166 1167 len += sprintf(page+len, "%s", buf); 1168 reg_count++; 1169 } 1170 spin_unlock(&dev->t10_pr.registration_lock); 1171 1172 if (!reg_count) 1173 len += sprintf(page+len, "None\n"); 1174 1175 return len; 1176 } 1177 1178 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1179 1180 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1181 struct se_device *dev, char *page) 1182 { 1183 struct t10_pr_registration *pr_reg; 1184 ssize_t len = 0; 1185 1186 spin_lock(&dev->dev_reservation_lock); 1187 pr_reg = dev->dev_pr_res_holder; 1188 if (pr_reg) { 1189 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1190 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1191 } else { 1192 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1193 } 1194 1195 spin_unlock(&dev->dev_reservation_lock); 1196 return len; 1197 } 1198 1199 SE_DEV_PR_ATTR_RO(res_pr_type); 1200 1201 static ssize_t target_core_dev_pr_show_attr_res_type( 1202 struct se_device *dev, char *page) 1203 { 1204 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1205 return sprintf(page, "SPC_PASSTHROUGH\n"); 1206 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1207 return sprintf(page, "SPC2_RESERVATIONS\n"); 1208 else 1209 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1210 } 1211 1212 SE_DEV_PR_ATTR_RO(res_type); 1213 1214 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1215 struct se_device *dev, char *page) 1216 { 1217 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1218 return 0; 1219 1220 return sprintf(page, "APTPL Bit Status: %s\n", 1221 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1222 } 1223 1224 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1225 1226 /* 1227 * res_aptpl_metadata 1228 */ 1229 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1230 struct se_device *dev, char *page) 1231 { 1232 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1233 return 0; 1234 1235 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1236 } 1237 1238 enum { 1239 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1240 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1241 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1242 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1243 }; 1244 1245 static match_table_t tokens = { 1246 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1247 {Opt_initiator_node, "initiator_node=%s"}, 1248 {Opt_initiator_sid, "initiator_sid=%s"}, 1249 {Opt_sa_res_key, "sa_res_key=%s"}, 1250 {Opt_res_holder, "res_holder=%d"}, 1251 {Opt_res_type, "res_type=%d"}, 1252 {Opt_res_scope, "res_scope=%d"}, 1253 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1254 {Opt_mapped_lun, "mapped_lun=%d"}, 1255 {Opt_target_fabric, "target_fabric=%s"}, 1256 {Opt_target_node, "target_node=%s"}, 1257 {Opt_tpgt, "tpgt=%d"}, 1258 {Opt_port_rtpi, "port_rtpi=%d"}, 1259 {Opt_target_lun, "target_lun=%d"}, 1260 {Opt_err, NULL} 1261 }; 1262 1263 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1264 struct se_device *dev, 1265 const char *page, 1266 size_t count) 1267 { 1268 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1269 unsigned char *t_fabric = NULL, *t_port = NULL; 1270 char *orig, *ptr, *opts; 1271 substring_t args[MAX_OPT_ARGS]; 1272 unsigned long long tmp_ll; 1273 u64 sa_res_key = 0; 1274 u32 mapped_lun = 0, target_lun = 0; 1275 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1276 u16 port_rpti = 0, tpgt = 0; 1277 u8 type = 0, scope; 1278 1279 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1280 return 0; 1281 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1282 return 0; 1283 1284 if (dev->export_count) { 1285 pr_debug("Unable to process APTPL metadata while" 1286 " active fabric exports exist\n"); 1287 return -EINVAL; 1288 } 1289 1290 opts = kstrdup(page, GFP_KERNEL); 1291 if (!opts) 1292 return -ENOMEM; 1293 1294 orig = opts; 1295 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1296 if (!*ptr) 1297 continue; 1298 1299 token = match_token(ptr, tokens, args); 1300 switch (token) { 1301 case Opt_initiator_fabric: 1302 i_fabric = match_strdup(args); 1303 if (!i_fabric) { 1304 ret = -ENOMEM; 1305 goto out; 1306 } 1307 break; 1308 case Opt_initiator_node: 1309 i_port = match_strdup(args); 1310 if (!i_port) { 1311 ret = -ENOMEM; 1312 goto out; 1313 } 1314 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1315 pr_err("APTPL metadata initiator_node=" 1316 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1317 PR_APTPL_MAX_IPORT_LEN); 1318 ret = -EINVAL; 1319 break; 1320 } 1321 break; 1322 case Opt_initiator_sid: 1323 isid = match_strdup(args); 1324 if (!isid) { 1325 ret = -ENOMEM; 1326 goto out; 1327 } 1328 if (strlen(isid) >= PR_REG_ISID_LEN) { 1329 pr_err("APTPL metadata initiator_isid" 1330 "= exceeds PR_REG_ISID_LEN: %d\n", 1331 PR_REG_ISID_LEN); 1332 ret = -EINVAL; 1333 break; 1334 } 1335 break; 1336 case Opt_sa_res_key: 1337 ret = kstrtoull(args->from, 0, &tmp_ll); 1338 if (ret < 0) { 1339 pr_err("kstrtoull() failed for sa_res_key=\n"); 1340 goto out; 1341 } 1342 sa_res_key = (u64)tmp_ll; 1343 break; 1344 /* 1345 * PR APTPL Metadata for Reservation 1346 */ 1347 case Opt_res_holder: 1348 match_int(args, &arg); 1349 res_holder = arg; 1350 break; 1351 case Opt_res_type: 1352 match_int(args, &arg); 1353 type = (u8)arg; 1354 break; 1355 case Opt_res_scope: 1356 match_int(args, &arg); 1357 scope = (u8)arg; 1358 break; 1359 case Opt_res_all_tg_pt: 1360 match_int(args, &arg); 1361 all_tg_pt = (int)arg; 1362 break; 1363 case Opt_mapped_lun: 1364 match_int(args, &arg); 1365 mapped_lun = (u32)arg; 1366 break; 1367 /* 1368 * PR APTPL Metadata for Target Port 1369 */ 1370 case Opt_target_fabric: 1371 t_fabric = match_strdup(args); 1372 if (!t_fabric) { 1373 ret = -ENOMEM; 1374 goto out; 1375 } 1376 break; 1377 case Opt_target_node: 1378 t_port = match_strdup(args); 1379 if (!t_port) { 1380 ret = -ENOMEM; 1381 goto out; 1382 } 1383 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1384 pr_err("APTPL metadata target_node=" 1385 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1386 PR_APTPL_MAX_TPORT_LEN); 1387 ret = -EINVAL; 1388 break; 1389 } 1390 break; 1391 case Opt_tpgt: 1392 match_int(args, &arg); 1393 tpgt = (u16)arg; 1394 break; 1395 case Opt_port_rtpi: 1396 match_int(args, &arg); 1397 port_rpti = (u16)arg; 1398 break; 1399 case Opt_target_lun: 1400 match_int(args, &arg); 1401 target_lun = (u32)arg; 1402 break; 1403 default: 1404 break; 1405 } 1406 } 1407 1408 if (!i_port || !t_port || !sa_res_key) { 1409 pr_err("Illegal parameters for APTPL registration\n"); 1410 ret = -EINVAL; 1411 goto out; 1412 } 1413 1414 if (res_holder && !(type)) { 1415 pr_err("Illegal PR type: 0x%02x for reservation" 1416 " holder\n", type); 1417 ret = -EINVAL; 1418 goto out; 1419 } 1420 1421 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1422 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1423 res_holder, all_tg_pt, type); 1424 out: 1425 kfree(i_fabric); 1426 kfree(i_port); 1427 kfree(isid); 1428 kfree(t_fabric); 1429 kfree(t_port); 1430 kfree(orig); 1431 return (ret == 0) ? count : ret; 1432 } 1433 1434 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1435 1436 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1437 1438 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1439 &target_core_dev_pr_res_holder.attr, 1440 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1441 &target_core_dev_pr_res_pr_generation.attr, 1442 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1443 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1444 &target_core_dev_pr_res_pr_type.attr, 1445 &target_core_dev_pr_res_type.attr, 1446 &target_core_dev_pr_res_aptpl_active.attr, 1447 &target_core_dev_pr_res_aptpl_metadata.attr, 1448 NULL, 1449 }; 1450 1451 static struct configfs_item_operations target_core_dev_pr_ops = { 1452 .show_attribute = target_core_dev_pr_attr_show, 1453 .store_attribute = target_core_dev_pr_attr_store, 1454 }; 1455 1456 static struct config_item_type target_core_dev_pr_cit = { 1457 .ct_item_ops = &target_core_dev_pr_ops, 1458 .ct_attrs = target_core_dev_pr_attrs, 1459 .ct_owner = THIS_MODULE, 1460 }; 1461 1462 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1463 1464 /* Start functions for struct config_item_type target_core_dev_cit */ 1465 1466 static ssize_t target_core_show_dev_info(void *p, char *page) 1467 { 1468 struct se_device *dev = p; 1469 struct se_subsystem_api *t = dev->transport; 1470 int bl = 0; 1471 ssize_t read_bytes = 0; 1472 1473 transport_dump_dev_state(dev, page, &bl); 1474 read_bytes += bl; 1475 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes); 1476 return read_bytes; 1477 } 1478 1479 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1480 .attr = { .ca_owner = THIS_MODULE, 1481 .ca_name = "info", 1482 .ca_mode = S_IRUGO }, 1483 .show = target_core_show_dev_info, 1484 .store = NULL, 1485 }; 1486 1487 static ssize_t target_core_store_dev_control( 1488 void *p, 1489 const char *page, 1490 size_t count) 1491 { 1492 struct se_device *dev = p; 1493 struct se_subsystem_api *t = dev->transport; 1494 1495 return t->set_configfs_dev_params(dev, page, count); 1496 } 1497 1498 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1499 .attr = { .ca_owner = THIS_MODULE, 1500 .ca_name = "control", 1501 .ca_mode = S_IWUSR }, 1502 .show = NULL, 1503 .store = target_core_store_dev_control, 1504 }; 1505 1506 static ssize_t target_core_show_dev_alias(void *p, char *page) 1507 { 1508 struct se_device *dev = p; 1509 1510 if (!(dev->dev_flags & DF_USING_ALIAS)) 1511 return 0; 1512 1513 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1514 } 1515 1516 static ssize_t target_core_store_dev_alias( 1517 void *p, 1518 const char *page, 1519 size_t count) 1520 { 1521 struct se_device *dev = p; 1522 struct se_hba *hba = dev->se_hba; 1523 ssize_t read_bytes; 1524 1525 if (count > (SE_DEV_ALIAS_LEN-1)) { 1526 pr_err("alias count: %d exceeds" 1527 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1528 SE_DEV_ALIAS_LEN-1); 1529 return -EINVAL; 1530 } 1531 1532 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1533 if (!read_bytes) 1534 return -EINVAL; 1535 if (dev->dev_alias[read_bytes - 1] == '\n') 1536 dev->dev_alias[read_bytes - 1] = '\0'; 1537 1538 dev->dev_flags |= DF_USING_ALIAS; 1539 1540 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1541 config_item_name(&hba->hba_group.cg_item), 1542 config_item_name(&dev->dev_group.cg_item), 1543 dev->dev_alias); 1544 1545 return read_bytes; 1546 } 1547 1548 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1549 .attr = { .ca_owner = THIS_MODULE, 1550 .ca_name = "alias", 1551 .ca_mode = S_IRUGO | S_IWUSR }, 1552 .show = target_core_show_dev_alias, 1553 .store = target_core_store_dev_alias, 1554 }; 1555 1556 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1557 { 1558 struct se_device *dev = p; 1559 1560 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1561 return 0; 1562 1563 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1564 } 1565 1566 static ssize_t target_core_store_dev_udev_path( 1567 void *p, 1568 const char *page, 1569 size_t count) 1570 { 1571 struct se_device *dev = p; 1572 struct se_hba *hba = dev->se_hba; 1573 ssize_t read_bytes; 1574 1575 if (count > (SE_UDEV_PATH_LEN-1)) { 1576 pr_err("udev_path count: %d exceeds" 1577 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1578 SE_UDEV_PATH_LEN-1); 1579 return -EINVAL; 1580 } 1581 1582 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1583 "%s", page); 1584 if (!read_bytes) 1585 return -EINVAL; 1586 if (dev->udev_path[read_bytes - 1] == '\n') 1587 dev->udev_path[read_bytes - 1] = '\0'; 1588 1589 dev->dev_flags |= DF_USING_UDEV_PATH; 1590 1591 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1592 config_item_name(&hba->hba_group.cg_item), 1593 config_item_name(&dev->dev_group.cg_item), 1594 dev->udev_path); 1595 1596 return read_bytes; 1597 } 1598 1599 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1600 .attr = { .ca_owner = THIS_MODULE, 1601 .ca_name = "udev_path", 1602 .ca_mode = S_IRUGO | S_IWUSR }, 1603 .show = target_core_show_dev_udev_path, 1604 .store = target_core_store_dev_udev_path, 1605 }; 1606 1607 static ssize_t target_core_show_dev_enable(void *p, char *page) 1608 { 1609 struct se_device *dev = p; 1610 1611 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1612 } 1613 1614 static ssize_t target_core_store_dev_enable( 1615 void *p, 1616 const char *page, 1617 size_t count) 1618 { 1619 struct se_device *dev = p; 1620 char *ptr; 1621 int ret; 1622 1623 ptr = strstr(page, "1"); 1624 if (!ptr) { 1625 pr_err("For dev_enable ops, only valid value" 1626 " is \"1\"\n"); 1627 return -EINVAL; 1628 } 1629 1630 ret = target_configure_device(dev); 1631 if (ret) 1632 return ret; 1633 return count; 1634 } 1635 1636 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1637 .attr = { .ca_owner = THIS_MODULE, 1638 .ca_name = "enable", 1639 .ca_mode = S_IRUGO | S_IWUSR }, 1640 .show = target_core_show_dev_enable, 1641 .store = target_core_store_dev_enable, 1642 }; 1643 1644 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1645 { 1646 struct se_device *dev = p; 1647 struct config_item *lu_ci; 1648 struct t10_alua_lu_gp *lu_gp; 1649 struct t10_alua_lu_gp_member *lu_gp_mem; 1650 ssize_t len = 0; 1651 1652 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1653 if (!lu_gp_mem) 1654 return 0; 1655 1656 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1657 lu_gp = lu_gp_mem->lu_gp; 1658 if (lu_gp) { 1659 lu_ci = &lu_gp->lu_gp_group.cg_item; 1660 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1661 config_item_name(lu_ci), lu_gp->lu_gp_id); 1662 } 1663 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1664 1665 return len; 1666 } 1667 1668 static ssize_t target_core_store_alua_lu_gp( 1669 void *p, 1670 const char *page, 1671 size_t count) 1672 { 1673 struct se_device *dev = p; 1674 struct se_hba *hba = dev->se_hba; 1675 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1676 struct t10_alua_lu_gp_member *lu_gp_mem; 1677 unsigned char buf[LU_GROUP_NAME_BUF]; 1678 int move = 0; 1679 1680 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1681 if (!lu_gp_mem) 1682 return 0; 1683 1684 if (count > LU_GROUP_NAME_BUF) { 1685 pr_err("ALUA LU Group Alias too large!\n"); 1686 return -EINVAL; 1687 } 1688 memset(buf, 0, LU_GROUP_NAME_BUF); 1689 memcpy(buf, page, count); 1690 /* 1691 * Any ALUA logical unit alias besides "NULL" means we will be 1692 * making a new group association. 1693 */ 1694 if (strcmp(strstrip(buf), "NULL")) { 1695 /* 1696 * core_alua_get_lu_gp_by_name() will increment reference to 1697 * struct t10_alua_lu_gp. This reference is released with 1698 * core_alua_get_lu_gp_by_name below(). 1699 */ 1700 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1701 if (!lu_gp_new) 1702 return -ENODEV; 1703 } 1704 1705 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1706 lu_gp = lu_gp_mem->lu_gp; 1707 if (lu_gp) { 1708 /* 1709 * Clearing an existing lu_gp association, and replacing 1710 * with NULL 1711 */ 1712 if (!lu_gp_new) { 1713 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1714 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1715 " %hu\n", 1716 config_item_name(&hba->hba_group.cg_item), 1717 config_item_name(&dev->dev_group.cg_item), 1718 config_item_name(&lu_gp->lu_gp_group.cg_item), 1719 lu_gp->lu_gp_id); 1720 1721 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1722 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1723 1724 return count; 1725 } 1726 /* 1727 * Removing existing association of lu_gp_mem with lu_gp 1728 */ 1729 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1730 move = 1; 1731 } 1732 /* 1733 * Associate lu_gp_mem with lu_gp_new. 1734 */ 1735 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1736 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1737 1738 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1739 " core/alua/lu_gps/%s, ID: %hu\n", 1740 (move) ? "Moving" : "Adding", 1741 config_item_name(&hba->hba_group.cg_item), 1742 config_item_name(&dev->dev_group.cg_item), 1743 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1744 lu_gp_new->lu_gp_id); 1745 1746 core_alua_put_lu_gp_from_name(lu_gp_new); 1747 return count; 1748 } 1749 1750 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1751 .attr = { .ca_owner = THIS_MODULE, 1752 .ca_name = "alua_lu_gp", 1753 .ca_mode = S_IRUGO | S_IWUSR }, 1754 .show = target_core_show_alua_lu_gp, 1755 .store = target_core_store_alua_lu_gp, 1756 }; 1757 1758 static ssize_t target_core_show_dev_lba_map(void *p, char *page) 1759 { 1760 struct se_device *dev = p; 1761 struct t10_alua_lba_map *map; 1762 struct t10_alua_lba_map_member *mem; 1763 char *b = page; 1764 int bl = 0; 1765 char state; 1766 1767 spin_lock(&dev->t10_alua.lba_map_lock); 1768 if (!list_empty(&dev->t10_alua.lba_map_list)) 1769 bl += sprintf(b + bl, "%u %u\n", 1770 dev->t10_alua.lba_map_segment_size, 1771 dev->t10_alua.lba_map_segment_multiplier); 1772 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 1773 bl += sprintf(b + bl, "%llu %llu", 1774 map->lba_map_first_lba, map->lba_map_last_lba); 1775 list_for_each_entry(mem, &map->lba_map_mem_list, 1776 lba_map_mem_list) { 1777 switch (mem->lba_map_mem_alua_state) { 1778 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 1779 state = 'O'; 1780 break; 1781 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 1782 state = 'A'; 1783 break; 1784 case ALUA_ACCESS_STATE_STANDBY: 1785 state = 'S'; 1786 break; 1787 case ALUA_ACCESS_STATE_UNAVAILABLE: 1788 state = 'U'; 1789 break; 1790 default: 1791 state = '.'; 1792 break; 1793 } 1794 bl += sprintf(b + bl, " %d:%c", 1795 mem->lba_map_mem_alua_pg_id, state); 1796 } 1797 bl += sprintf(b + bl, "\n"); 1798 } 1799 spin_unlock(&dev->t10_alua.lba_map_lock); 1800 return bl; 1801 } 1802 1803 static ssize_t target_core_store_dev_lba_map( 1804 void *p, 1805 const char *page, 1806 size_t count) 1807 { 1808 struct se_device *dev = p; 1809 struct t10_alua_lba_map *lba_map = NULL; 1810 struct list_head lba_list; 1811 char *map_entries, *ptr; 1812 char state; 1813 int pg_num = -1, pg; 1814 int ret = 0, num = 0, pg_id, alua_state; 1815 unsigned long start_lba = -1, end_lba = -1; 1816 unsigned long segment_size = -1, segment_mult = -1; 1817 1818 map_entries = kstrdup(page, GFP_KERNEL); 1819 if (!map_entries) 1820 return -ENOMEM; 1821 1822 INIT_LIST_HEAD(&lba_list); 1823 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 1824 if (!*ptr) 1825 continue; 1826 1827 if (num == 0) { 1828 if (sscanf(ptr, "%lu %lu\n", 1829 &segment_size, &segment_mult) != 2) { 1830 pr_err("Invalid line %d\n", num); 1831 ret = -EINVAL; 1832 break; 1833 } 1834 num++; 1835 continue; 1836 } 1837 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 1838 pr_err("Invalid line %d\n", num); 1839 ret = -EINVAL; 1840 break; 1841 } 1842 ptr = strchr(ptr, ' '); 1843 if (!ptr) { 1844 pr_err("Invalid line %d, missing end lba\n", num); 1845 ret = -EINVAL; 1846 break; 1847 } 1848 ptr++; 1849 ptr = strchr(ptr, ' '); 1850 if (!ptr) { 1851 pr_err("Invalid line %d, missing state definitions\n", 1852 num); 1853 ret = -EINVAL; 1854 break; 1855 } 1856 ptr++; 1857 lba_map = core_alua_allocate_lba_map(&lba_list, 1858 start_lba, end_lba); 1859 if (IS_ERR(lba_map)) { 1860 ret = PTR_ERR(lba_map); 1861 break; 1862 } 1863 pg = 0; 1864 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 1865 switch (state) { 1866 case 'O': 1867 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 1868 break; 1869 case 'A': 1870 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 1871 break; 1872 case 'S': 1873 alua_state = ALUA_ACCESS_STATE_STANDBY; 1874 break; 1875 case 'U': 1876 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 1877 break; 1878 default: 1879 pr_err("Invalid ALUA state '%c'\n", state); 1880 ret = -EINVAL; 1881 goto out; 1882 } 1883 1884 ret = core_alua_allocate_lba_map_mem(lba_map, 1885 pg_id, alua_state); 1886 if (ret) { 1887 pr_err("Invalid target descriptor %d:%c " 1888 "at line %d\n", 1889 pg_id, state, num); 1890 break; 1891 } 1892 pg++; 1893 ptr = strchr(ptr, ' '); 1894 if (ptr) 1895 ptr++; 1896 else 1897 break; 1898 } 1899 if (pg_num == -1) 1900 pg_num = pg; 1901 else if (pg != pg_num) { 1902 pr_err("Only %d from %d port groups definitions " 1903 "at line %d\n", pg, pg_num, num); 1904 ret = -EINVAL; 1905 break; 1906 } 1907 num++; 1908 } 1909 out: 1910 if (ret) { 1911 core_alua_free_lba_map(&lba_list); 1912 count = ret; 1913 } else 1914 core_alua_set_lba_map(dev, &lba_list, 1915 segment_size, segment_mult); 1916 kfree(map_entries); 1917 return count; 1918 } 1919 1920 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = { 1921 .attr = { .ca_owner = THIS_MODULE, 1922 .ca_name = "lba_map", 1923 .ca_mode = S_IRUGO | S_IWUSR }, 1924 .show = target_core_show_dev_lba_map, 1925 .store = target_core_store_dev_lba_map, 1926 }; 1927 1928 static struct configfs_attribute *lio_core_dev_attrs[] = { 1929 &target_core_attr_dev_info.attr, 1930 &target_core_attr_dev_control.attr, 1931 &target_core_attr_dev_alias.attr, 1932 &target_core_attr_dev_udev_path.attr, 1933 &target_core_attr_dev_enable.attr, 1934 &target_core_attr_dev_alua_lu_gp.attr, 1935 &target_core_attr_dev_lba_map.attr, 1936 NULL, 1937 }; 1938 1939 static void target_core_dev_release(struct config_item *item) 1940 { 1941 struct config_group *dev_cg = to_config_group(item); 1942 struct se_device *dev = 1943 container_of(dev_cg, struct se_device, dev_group); 1944 1945 kfree(dev_cg->default_groups); 1946 target_free_device(dev); 1947 } 1948 1949 static ssize_t target_core_dev_show(struct config_item *item, 1950 struct configfs_attribute *attr, 1951 char *page) 1952 { 1953 struct config_group *dev_cg = to_config_group(item); 1954 struct se_device *dev = 1955 container_of(dev_cg, struct se_device, dev_group); 1956 struct target_core_configfs_attribute *tc_attr = container_of( 1957 attr, struct target_core_configfs_attribute, attr); 1958 1959 if (!tc_attr->show) 1960 return -EINVAL; 1961 1962 return tc_attr->show(dev, page); 1963 } 1964 1965 static ssize_t target_core_dev_store(struct config_item *item, 1966 struct configfs_attribute *attr, 1967 const char *page, size_t count) 1968 { 1969 struct config_group *dev_cg = to_config_group(item); 1970 struct se_device *dev = 1971 container_of(dev_cg, struct se_device, dev_group); 1972 struct target_core_configfs_attribute *tc_attr = container_of( 1973 attr, struct target_core_configfs_attribute, attr); 1974 1975 if (!tc_attr->store) 1976 return -EINVAL; 1977 1978 return tc_attr->store(dev, page, count); 1979 } 1980 1981 static struct configfs_item_operations target_core_dev_item_ops = { 1982 .release = target_core_dev_release, 1983 .show_attribute = target_core_dev_show, 1984 .store_attribute = target_core_dev_store, 1985 }; 1986 1987 static struct config_item_type target_core_dev_cit = { 1988 .ct_item_ops = &target_core_dev_item_ops, 1989 .ct_attrs = lio_core_dev_attrs, 1990 .ct_owner = THIS_MODULE, 1991 }; 1992 1993 /* End functions for struct config_item_type target_core_dev_cit */ 1994 1995 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 1996 1997 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 1998 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 1999 static struct target_core_alua_lu_gp_attribute \ 2000 target_core_alua_lu_gp_##_name = \ 2001 __CONFIGFS_EATTR(_name, _mode, \ 2002 target_core_alua_lu_gp_show_attr_##_name, \ 2003 target_core_alua_lu_gp_store_attr_##_name); 2004 2005 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2006 static struct target_core_alua_lu_gp_attribute \ 2007 target_core_alua_lu_gp_##_name = \ 2008 __CONFIGFS_EATTR_RO(_name, \ 2009 target_core_alua_lu_gp_show_attr_##_name); 2010 2011 /* 2012 * lu_gp_id 2013 */ 2014 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2015 struct t10_alua_lu_gp *lu_gp, 2016 char *page) 2017 { 2018 if (!lu_gp->lu_gp_valid_id) 2019 return 0; 2020 2021 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2022 } 2023 2024 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2025 struct t10_alua_lu_gp *lu_gp, 2026 const char *page, 2027 size_t count) 2028 { 2029 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2030 unsigned long lu_gp_id; 2031 int ret; 2032 2033 ret = kstrtoul(page, 0, &lu_gp_id); 2034 if (ret < 0) { 2035 pr_err("kstrtoul() returned %d for" 2036 " lu_gp_id\n", ret); 2037 return ret; 2038 } 2039 if (lu_gp_id > 0x0000ffff) { 2040 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2041 " 0x0000ffff\n", lu_gp_id); 2042 return -EINVAL; 2043 } 2044 2045 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2046 if (ret < 0) 2047 return -EINVAL; 2048 2049 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2050 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2051 config_item_name(&alua_lu_gp_cg->cg_item), 2052 lu_gp->lu_gp_id); 2053 2054 return count; 2055 } 2056 2057 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2058 2059 /* 2060 * members 2061 */ 2062 static ssize_t target_core_alua_lu_gp_show_attr_members( 2063 struct t10_alua_lu_gp *lu_gp, 2064 char *page) 2065 { 2066 struct se_device *dev; 2067 struct se_hba *hba; 2068 struct t10_alua_lu_gp_member *lu_gp_mem; 2069 ssize_t len = 0, cur_len; 2070 unsigned char buf[LU_GROUP_NAME_BUF]; 2071 2072 memset(buf, 0, LU_GROUP_NAME_BUF); 2073 2074 spin_lock(&lu_gp->lu_gp_lock); 2075 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2076 dev = lu_gp_mem->lu_gp_mem_dev; 2077 hba = dev->se_hba; 2078 2079 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2080 config_item_name(&hba->hba_group.cg_item), 2081 config_item_name(&dev->dev_group.cg_item)); 2082 cur_len++; /* Extra byte for NULL terminator */ 2083 2084 if ((cur_len + len) > PAGE_SIZE) { 2085 pr_warn("Ran out of lu_gp_show_attr" 2086 "_members buffer\n"); 2087 break; 2088 } 2089 memcpy(page+len, buf, cur_len); 2090 len += cur_len; 2091 } 2092 spin_unlock(&lu_gp->lu_gp_lock); 2093 2094 return len; 2095 } 2096 2097 SE_DEV_ALUA_LU_ATTR_RO(members); 2098 2099 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2100 2101 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2102 &target_core_alua_lu_gp_lu_gp_id.attr, 2103 &target_core_alua_lu_gp_members.attr, 2104 NULL, 2105 }; 2106 2107 static void target_core_alua_lu_gp_release(struct config_item *item) 2108 { 2109 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2110 struct t10_alua_lu_gp, lu_gp_group); 2111 2112 core_alua_free_lu_gp(lu_gp); 2113 } 2114 2115 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2116 .release = target_core_alua_lu_gp_release, 2117 .show_attribute = target_core_alua_lu_gp_attr_show, 2118 .store_attribute = target_core_alua_lu_gp_attr_store, 2119 }; 2120 2121 static struct config_item_type target_core_alua_lu_gp_cit = { 2122 .ct_item_ops = &target_core_alua_lu_gp_ops, 2123 .ct_attrs = target_core_alua_lu_gp_attrs, 2124 .ct_owner = THIS_MODULE, 2125 }; 2126 2127 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2128 2129 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2130 2131 static struct config_group *target_core_alua_create_lu_gp( 2132 struct config_group *group, 2133 const char *name) 2134 { 2135 struct t10_alua_lu_gp *lu_gp; 2136 struct config_group *alua_lu_gp_cg = NULL; 2137 struct config_item *alua_lu_gp_ci = NULL; 2138 2139 lu_gp = core_alua_allocate_lu_gp(name, 0); 2140 if (IS_ERR(lu_gp)) 2141 return NULL; 2142 2143 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2144 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2145 2146 config_group_init_type_name(alua_lu_gp_cg, name, 2147 &target_core_alua_lu_gp_cit); 2148 2149 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2150 " Group: core/alua/lu_gps/%s\n", 2151 config_item_name(alua_lu_gp_ci)); 2152 2153 return alua_lu_gp_cg; 2154 2155 } 2156 2157 static void target_core_alua_drop_lu_gp( 2158 struct config_group *group, 2159 struct config_item *item) 2160 { 2161 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2162 struct t10_alua_lu_gp, lu_gp_group); 2163 2164 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2165 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2166 config_item_name(item), lu_gp->lu_gp_id); 2167 /* 2168 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2169 * -> target_core_alua_lu_gp_release() 2170 */ 2171 config_item_put(item); 2172 } 2173 2174 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2175 .make_group = &target_core_alua_create_lu_gp, 2176 .drop_item = &target_core_alua_drop_lu_gp, 2177 }; 2178 2179 static struct config_item_type target_core_alua_lu_gps_cit = { 2180 .ct_item_ops = NULL, 2181 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2182 .ct_owner = THIS_MODULE, 2183 }; 2184 2185 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2186 2187 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2188 2189 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2190 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2191 static struct target_core_alua_tg_pt_gp_attribute \ 2192 target_core_alua_tg_pt_gp_##_name = \ 2193 __CONFIGFS_EATTR(_name, _mode, \ 2194 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2195 target_core_alua_tg_pt_gp_store_attr_##_name); 2196 2197 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2198 static struct target_core_alua_tg_pt_gp_attribute \ 2199 target_core_alua_tg_pt_gp_##_name = \ 2200 __CONFIGFS_EATTR_RO(_name, \ 2201 target_core_alua_tg_pt_gp_show_attr_##_name); 2202 2203 /* 2204 * alua_access_state 2205 */ 2206 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2207 struct t10_alua_tg_pt_gp *tg_pt_gp, 2208 char *page) 2209 { 2210 return sprintf(page, "%d\n", 2211 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2212 } 2213 2214 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2215 struct t10_alua_tg_pt_gp *tg_pt_gp, 2216 const char *page, 2217 size_t count) 2218 { 2219 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2220 unsigned long tmp; 2221 int new_state, ret; 2222 2223 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2224 pr_err("Unable to do implicit ALUA on non valid" 2225 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2226 return -EINVAL; 2227 } 2228 if (!(dev->dev_flags & DF_CONFIGURED)) { 2229 pr_err("Unable to set alua_access_state while device is" 2230 " not configured\n"); 2231 return -ENODEV; 2232 } 2233 2234 ret = kstrtoul(page, 0, &tmp); 2235 if (ret < 0) { 2236 pr_err("Unable to extract new ALUA access state from" 2237 " %s\n", page); 2238 return ret; 2239 } 2240 new_state = (int)tmp; 2241 2242 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2243 pr_err("Unable to process implicit configfs ALUA" 2244 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2245 return -EINVAL; 2246 } 2247 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2248 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2249 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2250 pr_err("Unable to process implicit configfs ALUA transition" 2251 " while explicit ALUA management is enabled\n"); 2252 return -EINVAL; 2253 } 2254 2255 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2256 NULL, NULL, new_state, 0); 2257 return (!ret) ? count : -EINVAL; 2258 } 2259 2260 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2261 2262 /* 2263 * alua_access_status 2264 */ 2265 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2266 struct t10_alua_tg_pt_gp *tg_pt_gp, 2267 char *page) 2268 { 2269 return sprintf(page, "%s\n", 2270 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2271 } 2272 2273 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2274 struct t10_alua_tg_pt_gp *tg_pt_gp, 2275 const char *page, 2276 size_t count) 2277 { 2278 unsigned long tmp; 2279 int new_status, ret; 2280 2281 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2282 pr_err("Unable to do set ALUA access status on non" 2283 " valid tg_pt_gp ID: %hu\n", 2284 tg_pt_gp->tg_pt_gp_valid_id); 2285 return -EINVAL; 2286 } 2287 2288 ret = kstrtoul(page, 0, &tmp); 2289 if (ret < 0) { 2290 pr_err("Unable to extract new ALUA access status" 2291 " from %s\n", page); 2292 return ret; 2293 } 2294 new_status = (int)tmp; 2295 2296 if ((new_status != ALUA_STATUS_NONE) && 2297 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2298 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2299 pr_err("Illegal ALUA access status: 0x%02x\n", 2300 new_status); 2301 return -EINVAL; 2302 } 2303 2304 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2305 return count; 2306 } 2307 2308 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2309 2310 /* 2311 * alua_access_type 2312 */ 2313 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2314 struct t10_alua_tg_pt_gp *tg_pt_gp, 2315 char *page) 2316 { 2317 return core_alua_show_access_type(tg_pt_gp, page); 2318 } 2319 2320 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2321 struct t10_alua_tg_pt_gp *tg_pt_gp, 2322 const char *page, 2323 size_t count) 2324 { 2325 return core_alua_store_access_type(tg_pt_gp, page, count); 2326 } 2327 2328 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2329 2330 /* 2331 * alua_supported_states 2332 */ 2333 2334 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \ 2335 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \ 2336 struct t10_alua_tg_pt_gp *t, char *p) \ 2337 { \ 2338 return sprintf(p, "%d\n", !!(t->_var & _bit)); \ 2339 } 2340 2341 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \ 2342 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\ 2343 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \ 2344 { \ 2345 unsigned long tmp; \ 2346 int ret; \ 2347 \ 2348 if (!t->tg_pt_gp_valid_id) { \ 2349 pr_err("Unable to do set ##_name ALUA state on non" \ 2350 " valid tg_pt_gp ID: %hu\n", \ 2351 t->tg_pt_gp_valid_id); \ 2352 return -EINVAL; \ 2353 } \ 2354 \ 2355 ret = kstrtoul(p, 0, &tmp); \ 2356 if (ret < 0) { \ 2357 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2358 return -EINVAL; \ 2359 } \ 2360 if (tmp > 1) { \ 2361 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2362 return -EINVAL; \ 2363 } \ 2364 if (tmp) \ 2365 t->_var |= _bit; \ 2366 else \ 2367 t->_var &= ~_bit; \ 2368 \ 2369 return c; \ 2370 } 2371 2372 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning, 2373 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2374 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning, 2375 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2376 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR); 2377 2378 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline, 2379 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2380 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline, 2381 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2382 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR); 2383 2384 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent, 2385 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2386 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent, 2387 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2388 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO); 2389 2390 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable, 2391 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2392 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable, 2393 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2394 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR); 2395 2396 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby, 2397 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2398 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby, 2399 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2400 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR); 2401 2402 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized, 2403 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2404 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized, 2405 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2406 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR); 2407 2408 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized, 2409 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2410 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized, 2411 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2412 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR); 2413 2414 /* 2415 * alua_write_metadata 2416 */ 2417 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2418 struct t10_alua_tg_pt_gp *tg_pt_gp, 2419 char *page) 2420 { 2421 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2422 } 2423 2424 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2425 struct t10_alua_tg_pt_gp *tg_pt_gp, 2426 const char *page, 2427 size_t count) 2428 { 2429 unsigned long tmp; 2430 int ret; 2431 2432 ret = kstrtoul(page, 0, &tmp); 2433 if (ret < 0) { 2434 pr_err("Unable to extract alua_write_metadata\n"); 2435 return ret; 2436 } 2437 2438 if ((tmp != 0) && (tmp != 1)) { 2439 pr_err("Illegal value for alua_write_metadata:" 2440 " %lu\n", tmp); 2441 return -EINVAL; 2442 } 2443 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2444 2445 return count; 2446 } 2447 2448 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2449 2450 2451 2452 /* 2453 * nonop_delay_msecs 2454 */ 2455 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2456 struct t10_alua_tg_pt_gp *tg_pt_gp, 2457 char *page) 2458 { 2459 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2460 2461 } 2462 2463 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2464 struct t10_alua_tg_pt_gp *tg_pt_gp, 2465 const char *page, 2466 size_t count) 2467 { 2468 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2469 } 2470 2471 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2472 2473 /* 2474 * trans_delay_msecs 2475 */ 2476 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2477 struct t10_alua_tg_pt_gp *tg_pt_gp, 2478 char *page) 2479 { 2480 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2481 } 2482 2483 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2484 struct t10_alua_tg_pt_gp *tg_pt_gp, 2485 const char *page, 2486 size_t count) 2487 { 2488 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2489 } 2490 2491 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2492 2493 /* 2494 * implicit_trans_secs 2495 */ 2496 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs( 2497 struct t10_alua_tg_pt_gp *tg_pt_gp, 2498 char *page) 2499 { 2500 return core_alua_show_implicit_trans_secs(tg_pt_gp, page); 2501 } 2502 2503 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs( 2504 struct t10_alua_tg_pt_gp *tg_pt_gp, 2505 const char *page, 2506 size_t count) 2507 { 2508 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count); 2509 } 2510 2511 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR); 2512 2513 /* 2514 * preferred 2515 */ 2516 2517 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2518 struct t10_alua_tg_pt_gp *tg_pt_gp, 2519 char *page) 2520 { 2521 return core_alua_show_preferred_bit(tg_pt_gp, page); 2522 } 2523 2524 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2525 struct t10_alua_tg_pt_gp *tg_pt_gp, 2526 const char *page, 2527 size_t count) 2528 { 2529 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2530 } 2531 2532 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2533 2534 /* 2535 * tg_pt_gp_id 2536 */ 2537 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2538 struct t10_alua_tg_pt_gp *tg_pt_gp, 2539 char *page) 2540 { 2541 if (!tg_pt_gp->tg_pt_gp_valid_id) 2542 return 0; 2543 2544 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2545 } 2546 2547 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2548 struct t10_alua_tg_pt_gp *tg_pt_gp, 2549 const char *page, 2550 size_t count) 2551 { 2552 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2553 unsigned long tg_pt_gp_id; 2554 int ret; 2555 2556 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2557 if (ret < 0) { 2558 pr_err("kstrtoul() returned %d for" 2559 " tg_pt_gp_id\n", ret); 2560 return ret; 2561 } 2562 if (tg_pt_gp_id > 0x0000ffff) { 2563 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2564 " 0x0000ffff\n", tg_pt_gp_id); 2565 return -EINVAL; 2566 } 2567 2568 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2569 if (ret < 0) 2570 return -EINVAL; 2571 2572 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2573 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2574 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2575 tg_pt_gp->tg_pt_gp_id); 2576 2577 return count; 2578 } 2579 2580 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2581 2582 /* 2583 * members 2584 */ 2585 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2586 struct t10_alua_tg_pt_gp *tg_pt_gp, 2587 char *page) 2588 { 2589 struct se_port *port; 2590 struct se_portal_group *tpg; 2591 struct se_lun *lun; 2592 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2593 ssize_t len = 0, cur_len; 2594 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2595 2596 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2597 2598 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2599 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2600 tg_pt_gp_mem_list) { 2601 port = tg_pt_gp_mem->tg_pt; 2602 tpg = port->sep_tpg; 2603 lun = port->sep_lun; 2604 2605 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2606 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2607 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2608 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2609 config_item_name(&lun->lun_group.cg_item)); 2610 cur_len++; /* Extra byte for NULL terminator */ 2611 2612 if ((cur_len + len) > PAGE_SIZE) { 2613 pr_warn("Ran out of lu_gp_show_attr" 2614 "_members buffer\n"); 2615 break; 2616 } 2617 memcpy(page+len, buf, cur_len); 2618 len += cur_len; 2619 } 2620 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2621 2622 return len; 2623 } 2624 2625 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2626 2627 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2628 tg_pt_gp_group); 2629 2630 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2631 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2632 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2633 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2634 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr, 2635 &target_core_alua_tg_pt_gp_alua_support_offline.attr, 2636 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr, 2637 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr, 2638 &target_core_alua_tg_pt_gp_alua_support_standby.attr, 2639 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr, 2640 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr, 2641 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2642 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2643 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2644 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr, 2645 &target_core_alua_tg_pt_gp_preferred.attr, 2646 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2647 &target_core_alua_tg_pt_gp_members.attr, 2648 NULL, 2649 }; 2650 2651 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2652 { 2653 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2654 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2655 2656 core_alua_free_tg_pt_gp(tg_pt_gp); 2657 } 2658 2659 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2660 .release = target_core_alua_tg_pt_gp_release, 2661 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2662 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2663 }; 2664 2665 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2666 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2667 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2668 .ct_owner = THIS_MODULE, 2669 }; 2670 2671 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2672 2673 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2674 2675 static struct config_group *target_core_alua_create_tg_pt_gp( 2676 struct config_group *group, 2677 const char *name) 2678 { 2679 struct t10_alua *alua = container_of(group, struct t10_alua, 2680 alua_tg_pt_gps_group); 2681 struct t10_alua_tg_pt_gp *tg_pt_gp; 2682 struct config_group *alua_tg_pt_gp_cg = NULL; 2683 struct config_item *alua_tg_pt_gp_ci = NULL; 2684 2685 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2686 if (!tg_pt_gp) 2687 return NULL; 2688 2689 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2690 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2691 2692 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2693 &target_core_alua_tg_pt_gp_cit); 2694 2695 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2696 " Group: alua/tg_pt_gps/%s\n", 2697 config_item_name(alua_tg_pt_gp_ci)); 2698 2699 return alua_tg_pt_gp_cg; 2700 } 2701 2702 static void target_core_alua_drop_tg_pt_gp( 2703 struct config_group *group, 2704 struct config_item *item) 2705 { 2706 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2707 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2708 2709 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2710 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2711 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2712 /* 2713 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2714 * -> target_core_alua_tg_pt_gp_release(). 2715 */ 2716 config_item_put(item); 2717 } 2718 2719 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2720 .make_group = &target_core_alua_create_tg_pt_gp, 2721 .drop_item = &target_core_alua_drop_tg_pt_gp, 2722 }; 2723 2724 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2725 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2726 .ct_owner = THIS_MODULE, 2727 }; 2728 2729 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2730 2731 /* Start functions for struct config_item_type target_core_alua_cit */ 2732 2733 /* 2734 * target_core_alua_cit is a ConfigFS group that lives under 2735 * /sys/kernel/config/target/core/alua. There are default groups 2736 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2737 * target_core_alua_cit in target_core_init_configfs() below. 2738 */ 2739 static struct config_item_type target_core_alua_cit = { 2740 .ct_item_ops = NULL, 2741 .ct_attrs = NULL, 2742 .ct_owner = THIS_MODULE, 2743 }; 2744 2745 /* End functions for struct config_item_type target_core_alua_cit */ 2746 2747 /* Start functions for struct config_item_type target_core_stat_cit */ 2748 2749 static struct config_group *target_core_stat_mkdir( 2750 struct config_group *group, 2751 const char *name) 2752 { 2753 return ERR_PTR(-ENOSYS); 2754 } 2755 2756 static void target_core_stat_rmdir( 2757 struct config_group *group, 2758 struct config_item *item) 2759 { 2760 return; 2761 } 2762 2763 static struct configfs_group_operations target_core_stat_group_ops = { 2764 .make_group = &target_core_stat_mkdir, 2765 .drop_item = &target_core_stat_rmdir, 2766 }; 2767 2768 static struct config_item_type target_core_stat_cit = { 2769 .ct_group_ops = &target_core_stat_group_ops, 2770 .ct_owner = THIS_MODULE, 2771 }; 2772 2773 /* End functions for struct config_item_type target_core_stat_cit */ 2774 2775 /* Start functions for struct config_item_type target_core_hba_cit */ 2776 2777 static struct config_group *target_core_make_subdev( 2778 struct config_group *group, 2779 const char *name) 2780 { 2781 struct t10_alua_tg_pt_gp *tg_pt_gp; 2782 struct se_subsystem_api *t; 2783 struct config_item *hba_ci = &group->cg_item; 2784 struct se_hba *hba = item_to_hba(hba_ci); 2785 struct se_device *dev; 2786 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2787 struct config_group *dev_stat_grp = NULL; 2788 int errno = -ENOMEM, ret; 2789 2790 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2791 if (ret) 2792 return ERR_PTR(ret); 2793 /* 2794 * Locate the struct se_subsystem_api from parent's struct se_hba. 2795 */ 2796 t = hba->transport; 2797 2798 dev = target_alloc_device(hba, name); 2799 if (!dev) 2800 goto out_unlock; 2801 2802 dev_cg = &dev->dev_group; 2803 2804 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2805 GFP_KERNEL); 2806 if (!dev_cg->default_groups) 2807 goto out_free_device; 2808 2809 config_group_init_type_name(dev_cg, name, &target_core_dev_cit); 2810 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2811 &target_core_dev_attrib_cit); 2812 config_group_init_type_name(&dev->dev_pr_group, "pr", 2813 &target_core_dev_pr_cit); 2814 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2815 &target_core_dev_wwn_cit); 2816 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2817 "alua", &target_core_alua_tg_pt_gps_cit); 2818 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2819 "statistics", &target_core_stat_cit); 2820 2821 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2822 dev_cg->default_groups[1] = &dev->dev_pr_group; 2823 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2824 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2825 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2826 dev_cg->default_groups[5] = NULL; 2827 /* 2828 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2829 */ 2830 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2831 if (!tg_pt_gp) 2832 goto out_free_dev_cg_default_groups; 2833 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2834 2835 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2836 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2837 GFP_KERNEL); 2838 if (!tg_pt_gp_cg->default_groups) { 2839 pr_err("Unable to allocate tg_pt_gp_cg->" 2840 "default_groups\n"); 2841 goto out_free_tg_pt_gp; 2842 } 2843 2844 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2845 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2846 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2847 tg_pt_gp_cg->default_groups[1] = NULL; 2848 /* 2849 * Add core/$HBA/$DEV/statistics/ default groups 2850 */ 2851 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2852 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2853 GFP_KERNEL); 2854 if (!dev_stat_grp->default_groups) { 2855 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2856 goto out_free_tg_pt_gp_cg_default_groups; 2857 } 2858 target_stat_setup_dev_default_groups(dev); 2859 2860 mutex_unlock(&hba->hba_access_mutex); 2861 return dev_cg; 2862 2863 out_free_tg_pt_gp_cg_default_groups: 2864 kfree(tg_pt_gp_cg->default_groups); 2865 out_free_tg_pt_gp: 2866 core_alua_free_tg_pt_gp(tg_pt_gp); 2867 out_free_dev_cg_default_groups: 2868 kfree(dev_cg->default_groups); 2869 out_free_device: 2870 target_free_device(dev); 2871 out_unlock: 2872 mutex_unlock(&hba->hba_access_mutex); 2873 return ERR_PTR(errno); 2874 } 2875 2876 static void target_core_drop_subdev( 2877 struct config_group *group, 2878 struct config_item *item) 2879 { 2880 struct config_group *dev_cg = to_config_group(item); 2881 struct se_device *dev = 2882 container_of(dev_cg, struct se_device, dev_group); 2883 struct se_hba *hba; 2884 struct config_item *df_item; 2885 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2886 int i; 2887 2888 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2889 2890 mutex_lock(&hba->hba_access_mutex); 2891 2892 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2893 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2894 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2895 dev_stat_grp->default_groups[i] = NULL; 2896 config_item_put(df_item); 2897 } 2898 kfree(dev_stat_grp->default_groups); 2899 2900 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2901 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2902 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2903 tg_pt_gp_cg->default_groups[i] = NULL; 2904 config_item_put(df_item); 2905 } 2906 kfree(tg_pt_gp_cg->default_groups); 2907 /* 2908 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2909 * directly from target_core_alua_tg_pt_gp_release(). 2910 */ 2911 dev->t10_alua.default_tg_pt_gp = NULL; 2912 2913 for (i = 0; dev_cg->default_groups[i]; i++) { 2914 df_item = &dev_cg->default_groups[i]->cg_item; 2915 dev_cg->default_groups[i] = NULL; 2916 config_item_put(df_item); 2917 } 2918 /* 2919 * se_dev is released from target_core_dev_item_ops->release() 2920 */ 2921 config_item_put(item); 2922 mutex_unlock(&hba->hba_access_mutex); 2923 } 2924 2925 static struct configfs_group_operations target_core_hba_group_ops = { 2926 .make_group = target_core_make_subdev, 2927 .drop_item = target_core_drop_subdev, 2928 }; 2929 2930 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2931 #define SE_HBA_ATTR(_name, _mode) \ 2932 static struct target_core_hba_attribute \ 2933 target_core_hba_##_name = \ 2934 __CONFIGFS_EATTR(_name, _mode, \ 2935 target_core_hba_show_attr_##_name, \ 2936 target_core_hba_store_attr_##_name); 2937 2938 #define SE_HBA_ATTR_RO(_name) \ 2939 static struct target_core_hba_attribute \ 2940 target_core_hba_##_name = \ 2941 __CONFIGFS_EATTR_RO(_name, \ 2942 target_core_hba_show_attr_##_name); 2943 2944 static ssize_t target_core_hba_show_attr_hba_info( 2945 struct se_hba *hba, 2946 char *page) 2947 { 2948 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2949 hba->hba_id, hba->transport->name, 2950 TARGET_CORE_CONFIGFS_VERSION); 2951 } 2952 2953 SE_HBA_ATTR_RO(hba_info); 2954 2955 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2956 char *page) 2957 { 2958 int hba_mode = 0; 2959 2960 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2961 hba_mode = 1; 2962 2963 return sprintf(page, "%d\n", hba_mode); 2964 } 2965 2966 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2967 const char *page, size_t count) 2968 { 2969 struct se_subsystem_api *transport = hba->transport; 2970 unsigned long mode_flag; 2971 int ret; 2972 2973 if (transport->pmode_enable_hba == NULL) 2974 return -EINVAL; 2975 2976 ret = kstrtoul(page, 0, &mode_flag); 2977 if (ret < 0) { 2978 pr_err("Unable to extract hba mode flag: %d\n", ret); 2979 return ret; 2980 } 2981 2982 if (hba->dev_count) { 2983 pr_err("Unable to set hba_mode with active devices\n"); 2984 return -EINVAL; 2985 } 2986 2987 ret = transport->pmode_enable_hba(hba, mode_flag); 2988 if (ret < 0) 2989 return -EINVAL; 2990 if (ret > 0) 2991 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2992 else if (ret == 0) 2993 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2994 2995 return count; 2996 } 2997 2998 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2999 3000 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 3001 3002 static void target_core_hba_release(struct config_item *item) 3003 { 3004 struct se_hba *hba = container_of(to_config_group(item), 3005 struct se_hba, hba_group); 3006 core_delete_hba(hba); 3007 } 3008 3009 static struct configfs_attribute *target_core_hba_attrs[] = { 3010 &target_core_hba_hba_info.attr, 3011 &target_core_hba_hba_mode.attr, 3012 NULL, 3013 }; 3014 3015 static struct configfs_item_operations target_core_hba_item_ops = { 3016 .release = target_core_hba_release, 3017 .show_attribute = target_core_hba_attr_show, 3018 .store_attribute = target_core_hba_attr_store, 3019 }; 3020 3021 static struct config_item_type target_core_hba_cit = { 3022 .ct_item_ops = &target_core_hba_item_ops, 3023 .ct_group_ops = &target_core_hba_group_ops, 3024 .ct_attrs = target_core_hba_attrs, 3025 .ct_owner = THIS_MODULE, 3026 }; 3027 3028 static struct config_group *target_core_call_addhbatotarget( 3029 struct config_group *group, 3030 const char *name) 3031 { 3032 char *se_plugin_str, *str, *str2; 3033 struct se_hba *hba; 3034 char buf[TARGET_CORE_NAME_MAX_LEN]; 3035 unsigned long plugin_dep_id = 0; 3036 int ret; 3037 3038 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3039 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3040 pr_err("Passed *name strlen(): %d exceeds" 3041 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3042 TARGET_CORE_NAME_MAX_LEN); 3043 return ERR_PTR(-ENAMETOOLONG); 3044 } 3045 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3046 3047 str = strstr(buf, "_"); 3048 if (!str) { 3049 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3050 return ERR_PTR(-EINVAL); 3051 } 3052 se_plugin_str = buf; 3053 /* 3054 * Special case for subsystem plugins that have "_" in their names. 3055 * Namely rd_direct and rd_mcp.. 3056 */ 3057 str2 = strstr(str+1, "_"); 3058 if (str2) { 3059 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3060 str2++; /* Skip to start of plugin dependent ID */ 3061 str = str2; 3062 } else { 3063 *str = '\0'; /* Terminate for *se_plugin_str */ 3064 str++; /* Skip to start of plugin dependent ID */ 3065 } 3066 3067 ret = kstrtoul(str, 0, &plugin_dep_id); 3068 if (ret < 0) { 3069 pr_err("kstrtoul() returned %d for" 3070 " plugin_dep_id\n", ret); 3071 return ERR_PTR(ret); 3072 } 3073 /* 3074 * Load up TCM subsystem plugins if they have not already been loaded. 3075 */ 3076 transport_subsystem_check_init(); 3077 3078 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3079 if (IS_ERR(hba)) 3080 return ERR_CAST(hba); 3081 3082 config_group_init_type_name(&hba->hba_group, name, 3083 &target_core_hba_cit); 3084 3085 return &hba->hba_group; 3086 } 3087 3088 static void target_core_call_delhbafromtarget( 3089 struct config_group *group, 3090 struct config_item *item) 3091 { 3092 /* 3093 * core_delete_hba() is called from target_core_hba_item_ops->release() 3094 * -> target_core_hba_release() 3095 */ 3096 config_item_put(item); 3097 } 3098 3099 static struct configfs_group_operations target_core_group_ops = { 3100 .make_group = target_core_call_addhbatotarget, 3101 .drop_item = target_core_call_delhbafromtarget, 3102 }; 3103 3104 static struct config_item_type target_core_cit = { 3105 .ct_item_ops = NULL, 3106 .ct_group_ops = &target_core_group_ops, 3107 .ct_attrs = NULL, 3108 .ct_owner = THIS_MODULE, 3109 }; 3110 3111 /* Stop functions for struct config_item_type target_core_hba_cit */ 3112 3113 static int __init target_core_init_configfs(void) 3114 { 3115 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3116 struct config_group *lu_gp_cg = NULL; 3117 struct configfs_subsystem *subsys; 3118 struct t10_alua_lu_gp *lu_gp; 3119 int ret; 3120 3121 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3122 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3123 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3124 3125 subsys = target_core_subsystem[0]; 3126 config_group_init(&subsys->su_group); 3127 mutex_init(&subsys->su_mutex); 3128 3129 ret = init_se_kmem_caches(); 3130 if (ret < 0) 3131 return ret; 3132 /* 3133 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3134 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3135 */ 3136 target_cg = &subsys->su_group; 3137 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3138 GFP_KERNEL); 3139 if (!target_cg->default_groups) { 3140 pr_err("Unable to allocate target_cg->default_groups\n"); 3141 ret = -ENOMEM; 3142 goto out_global; 3143 } 3144 3145 config_group_init_type_name(&target_core_hbagroup, 3146 "core", &target_core_cit); 3147 target_cg->default_groups[0] = &target_core_hbagroup; 3148 target_cg->default_groups[1] = NULL; 3149 /* 3150 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3151 */ 3152 hba_cg = &target_core_hbagroup; 3153 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3154 GFP_KERNEL); 3155 if (!hba_cg->default_groups) { 3156 pr_err("Unable to allocate hba_cg->default_groups\n"); 3157 ret = -ENOMEM; 3158 goto out_global; 3159 } 3160 config_group_init_type_name(&alua_group, 3161 "alua", &target_core_alua_cit); 3162 hba_cg->default_groups[0] = &alua_group; 3163 hba_cg->default_groups[1] = NULL; 3164 /* 3165 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3166 * groups under /sys/kernel/config/target/core/alua/ 3167 */ 3168 alua_cg = &alua_group; 3169 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3170 GFP_KERNEL); 3171 if (!alua_cg->default_groups) { 3172 pr_err("Unable to allocate alua_cg->default_groups\n"); 3173 ret = -ENOMEM; 3174 goto out_global; 3175 } 3176 3177 config_group_init_type_name(&alua_lu_gps_group, 3178 "lu_gps", &target_core_alua_lu_gps_cit); 3179 alua_cg->default_groups[0] = &alua_lu_gps_group; 3180 alua_cg->default_groups[1] = NULL; 3181 /* 3182 * Add core/alua/lu_gps/default_lu_gp 3183 */ 3184 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3185 if (IS_ERR(lu_gp)) { 3186 ret = -ENOMEM; 3187 goto out_global; 3188 } 3189 3190 lu_gp_cg = &alua_lu_gps_group; 3191 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3192 GFP_KERNEL); 3193 if (!lu_gp_cg->default_groups) { 3194 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3195 ret = -ENOMEM; 3196 goto out_global; 3197 } 3198 3199 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3200 &target_core_alua_lu_gp_cit); 3201 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3202 lu_gp_cg->default_groups[1] = NULL; 3203 default_lu_gp = lu_gp; 3204 /* 3205 * Register the target_core_mod subsystem with configfs. 3206 */ 3207 ret = configfs_register_subsystem(subsys); 3208 if (ret < 0) { 3209 pr_err("Error %d while registering subsystem %s\n", 3210 ret, subsys->su_group.cg_item.ci_namebuf); 3211 goto out_global; 3212 } 3213 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3214 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3215 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3216 /* 3217 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3218 */ 3219 ret = rd_module_init(); 3220 if (ret < 0) 3221 goto out; 3222 3223 ret = core_dev_setup_virtual_lun0(); 3224 if (ret < 0) 3225 goto out; 3226 3227 ret = target_xcopy_setup_pt(); 3228 if (ret < 0) 3229 goto out; 3230 3231 return 0; 3232 3233 out: 3234 configfs_unregister_subsystem(subsys); 3235 core_dev_release_virtual_lun0(); 3236 rd_module_exit(); 3237 out_global: 3238 if (default_lu_gp) { 3239 core_alua_free_lu_gp(default_lu_gp); 3240 default_lu_gp = NULL; 3241 } 3242 if (lu_gp_cg) 3243 kfree(lu_gp_cg->default_groups); 3244 if (alua_cg) 3245 kfree(alua_cg->default_groups); 3246 if (hba_cg) 3247 kfree(hba_cg->default_groups); 3248 kfree(target_cg->default_groups); 3249 release_se_kmem_caches(); 3250 return ret; 3251 } 3252 3253 static void __exit target_core_exit_configfs(void) 3254 { 3255 struct configfs_subsystem *subsys; 3256 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3257 struct config_item *item; 3258 int i; 3259 3260 subsys = target_core_subsystem[0]; 3261 3262 lu_gp_cg = &alua_lu_gps_group; 3263 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3264 item = &lu_gp_cg->default_groups[i]->cg_item; 3265 lu_gp_cg->default_groups[i] = NULL; 3266 config_item_put(item); 3267 } 3268 kfree(lu_gp_cg->default_groups); 3269 lu_gp_cg->default_groups = NULL; 3270 3271 alua_cg = &alua_group; 3272 for (i = 0; alua_cg->default_groups[i]; i++) { 3273 item = &alua_cg->default_groups[i]->cg_item; 3274 alua_cg->default_groups[i] = NULL; 3275 config_item_put(item); 3276 } 3277 kfree(alua_cg->default_groups); 3278 alua_cg->default_groups = NULL; 3279 3280 hba_cg = &target_core_hbagroup; 3281 for (i = 0; hba_cg->default_groups[i]; i++) { 3282 item = &hba_cg->default_groups[i]->cg_item; 3283 hba_cg->default_groups[i] = NULL; 3284 config_item_put(item); 3285 } 3286 kfree(hba_cg->default_groups); 3287 hba_cg->default_groups = NULL; 3288 /* 3289 * We expect subsys->su_group.default_groups to be released 3290 * by configfs subsystem provider logic.. 3291 */ 3292 configfs_unregister_subsystem(subsys); 3293 kfree(subsys->su_group.default_groups); 3294 3295 core_alua_free_lu_gp(default_lu_gp); 3296 default_lu_gp = NULL; 3297 3298 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3299 " Infrastructure\n"); 3300 3301 core_dev_release_virtual_lun0(); 3302 rd_module_exit(); 3303 target_xcopy_release_pt(); 3304 release_se_kmem_caches(); 3305 } 3306 3307 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3308 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3309 MODULE_LICENSE("GPL"); 3310 3311 module_init(target_core_init_configfs); 3312 module_exit(target_core_exit_configfs); 3313