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