1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2013 Datera, Inc. 7 * 8 * Nicholas A. Bellinger <nab@kernel.org> 9 * 10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 ****************************************************************************/ 22 23 #include <linux/module.h> 24 #include <linux/moduleparam.h> 25 #include <generated/utsrelease.h> 26 #include <linux/utsname.h> 27 #include <linux/init.h> 28 #include <linux/fs.h> 29 #include <linux/namei.h> 30 #include <linux/slab.h> 31 #include <linux/types.h> 32 #include <linux/delay.h> 33 #include <linux/unistd.h> 34 #include <linux/string.h> 35 #include <linux/parser.h> 36 #include <linux/syscalls.h> 37 #include <linux/configfs.h> 38 #include <linux/spinlock.h> 39 40 #include <target/target_core_base.h> 41 #include <target/target_core_backend.h> 42 #include <target/target_core_fabric.h> 43 #include <target/target_core_fabric_configfs.h> 44 #include <target/target_core_configfs.h> 45 #include <target/configfs_macros.h> 46 47 #include "target_core_internal.h" 48 #include "target_core_alua.h" 49 #include "target_core_pr.h" 50 #include "target_core_rd.h" 51 #include "target_core_xcopy.h" 52 53 extern struct t10_alua_lu_gp *default_lu_gp; 54 55 static LIST_HEAD(g_tf_list); 56 static DEFINE_MUTEX(g_tf_lock); 57 58 struct target_core_configfs_attribute { 59 struct configfs_attribute attr; 60 ssize_t (*show)(void *, char *); 61 ssize_t (*store)(void *, const char *, size_t); 62 }; 63 64 static struct config_group target_core_hbagroup; 65 static struct config_group alua_group; 66 static struct config_group alua_lu_gps_group; 67 68 static inline struct se_hba * 69 item_to_hba(struct config_item *item) 70 { 71 return container_of(to_config_group(item), struct se_hba, hba_group); 72 } 73 74 /* 75 * Attributes for /sys/kernel/config/target/ 76 */ 77 static ssize_t target_core_attr_show(struct config_item *item, 78 struct configfs_attribute *attr, 79 char *page) 80 { 81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 83 utsname()->sysname, utsname()->machine); 84 } 85 86 static struct configfs_item_operations target_core_fabric_item_ops = { 87 .show_attribute = target_core_attr_show, 88 }; 89 90 static struct configfs_attribute target_core_item_attr_version = { 91 .ca_owner = THIS_MODULE, 92 .ca_name = "version", 93 .ca_mode = S_IRUGO, 94 }; 95 96 static struct target_fabric_configfs *target_core_get_fabric( 97 const char *name) 98 { 99 struct target_fabric_configfs *tf; 100 101 if (!name) 102 return NULL; 103 104 mutex_lock(&g_tf_lock); 105 list_for_each_entry(tf, &g_tf_list, tf_list) { 106 if (!strcmp(tf->tf_name, name)) { 107 atomic_inc(&tf->tf_access_cnt); 108 mutex_unlock(&g_tf_lock); 109 return tf; 110 } 111 } 112 mutex_unlock(&g_tf_lock); 113 114 return NULL; 115 } 116 117 /* 118 * Called from struct target_core_group_ops->make_group() 119 */ 120 static struct config_group *target_core_register_fabric( 121 struct config_group *group, 122 const char *name) 123 { 124 struct target_fabric_configfs *tf; 125 int ret; 126 127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 128 " %s\n", group, name); 129 /* 130 * Below are some hardcoded request_module() calls to automatically 131 * local fabric modules when the following is called: 132 * 133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 134 * 135 * Note that this does not limit which TCM fabric module can be 136 * registered, but simply provids auto loading logic for modules with 137 * mkdir(2) system calls with known TCM fabric modules. 138 */ 139 if (!strncmp(name, "iscsi", 5)) { 140 /* 141 * Automatically load the LIO Target fabric module when the 142 * following is called: 143 * 144 * mkdir -p $CONFIGFS/target/iscsi 145 */ 146 ret = request_module("iscsi_target_mod"); 147 if (ret < 0) { 148 pr_err("request_module() failed for" 149 " iscsi_target_mod.ko: %d\n", ret); 150 return ERR_PTR(-EINVAL); 151 } 152 } else if (!strncmp(name, "loopback", 8)) { 153 /* 154 * Automatically load the tcm_loop fabric module when the 155 * following is called: 156 * 157 * mkdir -p $CONFIGFS/target/loopback 158 */ 159 ret = request_module("tcm_loop"); 160 if (ret < 0) { 161 pr_err("request_module() failed for" 162 " tcm_loop.ko: %d\n", ret); 163 return ERR_PTR(-EINVAL); 164 } 165 } 166 167 tf = target_core_get_fabric(name); 168 if (!tf) { 169 pr_err("target_core_get_fabric() failed for %s\n", 170 name); 171 return ERR_PTR(-EINVAL); 172 } 173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 174 " %s\n", tf->tf_name); 175 /* 176 * On a successful target_core_get_fabric() look, the returned 177 * struct target_fabric_configfs *tf will contain a usage reference. 178 */ 179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 180 &tf->tf_cit_tmpl.tfc_wwn_cit); 181 182 tf->tf_group.default_groups = tf->tf_default_groups; 183 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 184 tf->tf_group.default_groups[1] = NULL; 185 186 config_group_init_type_name(&tf->tf_group, name, 187 &tf->tf_cit_tmpl.tfc_wwn_cit); 188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 189 &tf->tf_cit_tmpl.tfc_discovery_cit); 190 191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 192 " %s\n", tf->tf_group.cg_item.ci_name); 193 /* 194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 195 */ 196 tf->tf_ops.tf_subsys = tf->tf_subsys; 197 tf->tf_fabric = &tf->tf_group.cg_item; 198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 199 " for %s\n", name); 200 201 return &tf->tf_group; 202 } 203 204 /* 205 * Called from struct target_core_group_ops->drop_item() 206 */ 207 static void target_core_deregister_fabric( 208 struct config_group *group, 209 struct config_item *item) 210 { 211 struct target_fabric_configfs *tf = container_of( 212 to_config_group(item), struct target_fabric_configfs, tf_group); 213 struct config_group *tf_group; 214 struct config_item *df_item; 215 int i; 216 217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 218 " tf list\n", config_item_name(item)); 219 220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 221 " %s\n", tf->tf_name); 222 atomic_dec(&tf->tf_access_cnt); 223 224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 225 " tf->tf_fabric for %s\n", tf->tf_name); 226 tf->tf_fabric = NULL; 227 228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 229 " %s\n", config_item_name(item)); 230 231 tf_group = &tf->tf_group; 232 for (i = 0; tf_group->default_groups[i]; i++) { 233 df_item = &tf_group->default_groups[i]->cg_item; 234 tf_group->default_groups[i] = NULL; 235 config_item_put(df_item); 236 } 237 config_item_put(item); 238 } 239 240 static struct configfs_group_operations target_core_fabric_group_ops = { 241 .make_group = &target_core_register_fabric, 242 .drop_item = &target_core_deregister_fabric, 243 }; 244 245 /* 246 * All item attributes appearing in /sys/kernel/target/ appear here. 247 */ 248 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 249 &target_core_item_attr_version, 250 NULL, 251 }; 252 253 /* 254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 255 */ 256 static struct config_item_type target_core_fabrics_item = { 257 .ct_item_ops = &target_core_fabric_item_ops, 258 .ct_group_ops = &target_core_fabric_group_ops, 259 .ct_attrs = target_core_fabric_item_attrs, 260 .ct_owner = THIS_MODULE, 261 }; 262 263 static struct configfs_subsystem target_core_fabrics = { 264 .su_group = { 265 .cg_item = { 266 .ci_namebuf = "target", 267 .ci_type = &target_core_fabrics_item, 268 }, 269 }, 270 }; 271 272 struct configfs_subsystem *target_core_subsystem[] = { 273 &target_core_fabrics, 274 NULL, 275 }; 276 277 /*############################################################################## 278 // Start functions called by external Target Fabrics Modules 279 //############################################################################*/ 280 281 /* 282 * First function called by fabric modules to: 283 * 284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 285 * 2) Add struct target_fabric_configfs to g_tf_list 286 * 3) Return struct target_fabric_configfs to fabric module to be passed 287 * into target_fabric_configfs_register(). 288 */ 289 struct target_fabric_configfs *target_fabric_configfs_init( 290 struct module *fabric_mod, 291 const char *name) 292 { 293 struct target_fabric_configfs *tf; 294 295 if (!(name)) { 296 pr_err("Unable to locate passed fabric name\n"); 297 return ERR_PTR(-EINVAL); 298 } 299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 300 pr_err("Passed name: %s exceeds TARGET_FABRIC" 301 "_NAME_SIZE\n", name); 302 return ERR_PTR(-EINVAL); 303 } 304 305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 306 if (!tf) 307 return ERR_PTR(-ENOMEM); 308 309 INIT_LIST_HEAD(&tf->tf_list); 310 atomic_set(&tf->tf_access_cnt, 0); 311 /* 312 * Setup the default generic struct config_item_type's (cits) in 313 * struct target_fabric_configfs->tf_cit_tmpl 314 */ 315 tf->tf_module = fabric_mod; 316 target_fabric_setup_cits(tf); 317 318 tf->tf_subsys = target_core_subsystem[0]; 319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 320 321 mutex_lock(&g_tf_lock); 322 list_add_tail(&tf->tf_list, &g_tf_list); 323 mutex_unlock(&g_tf_lock); 324 325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 326 ">>>>>>>>>>>>>>\n"); 327 pr_debug("Initialized struct target_fabric_configfs: %p for" 328 " %s\n", tf, tf->tf_name); 329 return tf; 330 } 331 EXPORT_SYMBOL(target_fabric_configfs_init); 332 333 /* 334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 335 */ 336 void target_fabric_configfs_free( 337 struct target_fabric_configfs *tf) 338 { 339 mutex_lock(&g_tf_lock); 340 list_del(&tf->tf_list); 341 mutex_unlock(&g_tf_lock); 342 343 kfree(tf); 344 } 345 EXPORT_SYMBOL(target_fabric_configfs_free); 346 347 /* 348 * Perform a sanity check of the passed tf->tf_ops before completing 349 * TCM fabric module registration. 350 */ 351 static int target_fabric_tf_ops_check( 352 struct target_fabric_configfs *tf) 353 { 354 struct target_core_fabric_ops *tfo = &tf->tf_ops; 355 356 if (!tfo->get_fabric_name) { 357 pr_err("Missing tfo->get_fabric_name()\n"); 358 return -EINVAL; 359 } 360 if (!tfo->get_fabric_proto_ident) { 361 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_get_wwn) { 365 pr_err("Missing tfo->tpg_get_wwn()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_get_tag) { 369 pr_err("Missing tfo->tpg_get_tag()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_get_default_depth) { 373 pr_err("Missing tfo->tpg_get_default_depth()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_get_pr_transport_id) { 377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_pr_transport_id_len) { 381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->tpg_check_demo_mode) { 385 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->tpg_check_demo_mode_cache) { 389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->tpg_check_demo_mode_write_protect) { 393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->tpg_check_prod_mode_write_protect) { 397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->tpg_alloc_fabric_acl) { 401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->tpg_release_fabric_acl) { 405 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->tpg_get_inst_index) { 409 pr_err("Missing tfo->tpg_get_inst_index()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->release_cmd) { 413 pr_err("Missing tfo->release_cmd()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->shutdown_session) { 417 pr_err("Missing tfo->shutdown_session()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->close_session) { 421 pr_err("Missing tfo->close_session()\n"); 422 return -EINVAL; 423 } 424 if (!tfo->sess_get_index) { 425 pr_err("Missing tfo->sess_get_index()\n"); 426 return -EINVAL; 427 } 428 if (!tfo->write_pending) { 429 pr_err("Missing tfo->write_pending()\n"); 430 return -EINVAL; 431 } 432 if (!tfo->write_pending_status) { 433 pr_err("Missing tfo->write_pending_status()\n"); 434 return -EINVAL; 435 } 436 if (!tfo->set_default_node_attributes) { 437 pr_err("Missing tfo->set_default_node_attributes()\n"); 438 return -EINVAL; 439 } 440 if (!tfo->get_task_tag) { 441 pr_err("Missing tfo->get_task_tag()\n"); 442 return -EINVAL; 443 } 444 if (!tfo->get_cmd_state) { 445 pr_err("Missing tfo->get_cmd_state()\n"); 446 return -EINVAL; 447 } 448 if (!tfo->queue_data_in) { 449 pr_err("Missing tfo->queue_data_in()\n"); 450 return -EINVAL; 451 } 452 if (!tfo->queue_status) { 453 pr_err("Missing tfo->queue_status()\n"); 454 return -EINVAL; 455 } 456 if (!tfo->queue_tm_rsp) { 457 pr_err("Missing tfo->queue_tm_rsp()\n"); 458 return -EINVAL; 459 } 460 if (!tfo->aborted_task) { 461 pr_err("Missing tfo->aborted_task()\n"); 462 return -EINVAL; 463 } 464 /* 465 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 466 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 467 * target_core_fabric_configfs.c WWN+TPG group context code. 468 */ 469 if (!tfo->fabric_make_wwn) { 470 pr_err("Missing tfo->fabric_make_wwn()\n"); 471 return -EINVAL; 472 } 473 if (!tfo->fabric_drop_wwn) { 474 pr_err("Missing tfo->fabric_drop_wwn()\n"); 475 return -EINVAL; 476 } 477 if (!tfo->fabric_make_tpg) { 478 pr_err("Missing tfo->fabric_make_tpg()\n"); 479 return -EINVAL; 480 } 481 if (!tfo->fabric_drop_tpg) { 482 pr_err("Missing tfo->fabric_drop_tpg()\n"); 483 return -EINVAL; 484 } 485 486 return 0; 487 } 488 489 /* 490 * Called 2nd from fabric module with returned parameter of 491 * struct target_fabric_configfs * from target_fabric_configfs_init(). 492 * 493 * Upon a successful registration, the new fabric's struct config_item is 494 * return. Also, a pointer to this struct is set in the passed 495 * struct target_fabric_configfs. 496 */ 497 int target_fabric_configfs_register( 498 struct target_fabric_configfs *tf) 499 { 500 int ret; 501 502 if (!tf) { 503 pr_err("Unable to locate target_fabric_configfs" 504 " pointer\n"); 505 return -EINVAL; 506 } 507 if (!tf->tf_subsys) { 508 pr_err("Unable to target struct config_subsystem" 509 " pointer\n"); 510 return -EINVAL; 511 } 512 ret = target_fabric_tf_ops_check(tf); 513 if (ret < 0) 514 return ret; 515 516 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 517 ">>>>>>>>>>\n"); 518 return 0; 519 } 520 EXPORT_SYMBOL(target_fabric_configfs_register); 521 522 void target_fabric_configfs_deregister( 523 struct target_fabric_configfs *tf) 524 { 525 struct configfs_subsystem *su; 526 527 if (!tf) { 528 pr_err("Unable to locate passed target_fabric_" 529 "configfs\n"); 530 return; 531 } 532 su = tf->tf_subsys; 533 if (!su) { 534 pr_err("Unable to locate passed tf->tf_subsys" 535 " pointer\n"); 536 return; 537 } 538 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 539 ">>>>>>>>>>>>\n"); 540 mutex_lock(&g_tf_lock); 541 if (atomic_read(&tf->tf_access_cnt)) { 542 mutex_unlock(&g_tf_lock); 543 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 544 tf->tf_name); 545 BUG(); 546 } 547 list_del(&tf->tf_list); 548 mutex_unlock(&g_tf_lock); 549 550 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 551 " %s\n", tf->tf_name); 552 tf->tf_module = NULL; 553 tf->tf_subsys = NULL; 554 kfree(tf); 555 556 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 557 ">>>>>\n"); 558 } 559 EXPORT_SYMBOL(target_fabric_configfs_deregister); 560 561 /*############################################################################## 562 // Stop functions called by external Target Fabrics Modules 563 //############################################################################*/ 564 565 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 566 567 #define DEF_DEV_ATTRIB_SHOW(_name) \ 568 static ssize_t target_core_dev_show_attr_##_name( \ 569 struct se_dev_attrib *da, \ 570 char *page) \ 571 { \ 572 return snprintf(page, PAGE_SIZE, "%u\n", \ 573 (u32)da->da_dev->dev_attrib._name); \ 574 } 575 576 #define DEF_DEV_ATTRIB_STORE(_name) \ 577 static ssize_t target_core_dev_store_attr_##_name( \ 578 struct se_dev_attrib *da, \ 579 const char *page, \ 580 size_t count) \ 581 { \ 582 unsigned long val; \ 583 int ret; \ 584 \ 585 ret = kstrtoul(page, 0, &val); \ 586 if (ret < 0) { \ 587 pr_err("kstrtoul() failed with" \ 588 " ret: %d\n", ret); \ 589 return -EINVAL; \ 590 } \ 591 ret = se_dev_set_##_name(da->da_dev, (u32)val); \ 592 \ 593 return (!ret) ? count : -EINVAL; \ 594 } 595 596 #define DEF_DEV_ATTRIB(_name) \ 597 DEF_DEV_ATTRIB_SHOW(_name); \ 598 DEF_DEV_ATTRIB_STORE(_name); 599 600 #define DEF_DEV_ATTRIB_RO(_name) \ 601 DEF_DEV_ATTRIB_SHOW(_name); 602 603 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 604 #define SE_DEV_ATTR(_name, _mode) \ 605 static struct target_core_dev_attrib_attribute \ 606 target_core_dev_attrib_##_name = \ 607 __CONFIGFS_EATTR(_name, _mode, \ 608 target_core_dev_show_attr_##_name, \ 609 target_core_dev_store_attr_##_name); 610 611 #define SE_DEV_ATTR_RO(_name); \ 612 static struct target_core_dev_attrib_attribute \ 613 target_core_dev_attrib_##_name = \ 614 __CONFIGFS_EATTR_RO(_name, \ 615 target_core_dev_show_attr_##_name); 616 617 DEF_DEV_ATTRIB(emulate_model_alias); 618 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR); 619 620 DEF_DEV_ATTRIB(emulate_dpo); 621 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 622 623 DEF_DEV_ATTRIB(emulate_fua_write); 624 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 625 626 DEF_DEV_ATTRIB(emulate_fua_read); 627 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 628 629 DEF_DEV_ATTRIB(emulate_write_cache); 630 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 631 632 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 633 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 634 635 DEF_DEV_ATTRIB(emulate_tas); 636 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 637 638 DEF_DEV_ATTRIB(emulate_tpu); 639 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 640 641 DEF_DEV_ATTRIB(emulate_tpws); 642 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 643 644 DEF_DEV_ATTRIB(emulate_caw); 645 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR); 646 647 DEF_DEV_ATTRIB(emulate_3pc); 648 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR); 649 650 DEF_DEV_ATTRIB(pi_prot_type); 651 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR); 652 653 DEF_DEV_ATTRIB_RO(hw_pi_prot_type); 654 SE_DEV_ATTR_RO(hw_pi_prot_type); 655 656 DEF_DEV_ATTRIB(pi_prot_format); 657 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR); 658 659 DEF_DEV_ATTRIB(enforce_pr_isids); 660 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 661 662 DEF_DEV_ATTRIB(is_nonrot); 663 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 664 665 DEF_DEV_ATTRIB(emulate_rest_reord); 666 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 667 668 DEF_DEV_ATTRIB_RO(hw_block_size); 669 SE_DEV_ATTR_RO(hw_block_size); 670 671 DEF_DEV_ATTRIB(block_size); 672 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 673 674 DEF_DEV_ATTRIB_RO(hw_max_sectors); 675 SE_DEV_ATTR_RO(hw_max_sectors); 676 677 DEF_DEV_ATTRIB(fabric_max_sectors); 678 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR); 679 680 DEF_DEV_ATTRIB(optimal_sectors); 681 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 682 683 DEF_DEV_ATTRIB_RO(hw_queue_depth); 684 SE_DEV_ATTR_RO(hw_queue_depth); 685 686 DEF_DEV_ATTRIB(queue_depth); 687 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 688 689 DEF_DEV_ATTRIB(max_unmap_lba_count); 690 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 691 692 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 693 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 694 695 DEF_DEV_ATTRIB(unmap_granularity); 696 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 697 698 DEF_DEV_ATTRIB(unmap_granularity_alignment); 699 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 700 701 DEF_DEV_ATTRIB(max_write_same_len); 702 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR); 703 704 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 705 706 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 707 &target_core_dev_attrib_emulate_model_alias.attr, 708 &target_core_dev_attrib_emulate_dpo.attr, 709 &target_core_dev_attrib_emulate_fua_write.attr, 710 &target_core_dev_attrib_emulate_fua_read.attr, 711 &target_core_dev_attrib_emulate_write_cache.attr, 712 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 713 &target_core_dev_attrib_emulate_tas.attr, 714 &target_core_dev_attrib_emulate_tpu.attr, 715 &target_core_dev_attrib_emulate_tpws.attr, 716 &target_core_dev_attrib_emulate_caw.attr, 717 &target_core_dev_attrib_emulate_3pc.attr, 718 &target_core_dev_attrib_pi_prot_type.attr, 719 &target_core_dev_attrib_hw_pi_prot_type.attr, 720 &target_core_dev_attrib_pi_prot_format.attr, 721 &target_core_dev_attrib_enforce_pr_isids.attr, 722 &target_core_dev_attrib_is_nonrot.attr, 723 &target_core_dev_attrib_emulate_rest_reord.attr, 724 &target_core_dev_attrib_hw_block_size.attr, 725 &target_core_dev_attrib_block_size.attr, 726 &target_core_dev_attrib_hw_max_sectors.attr, 727 &target_core_dev_attrib_fabric_max_sectors.attr, 728 &target_core_dev_attrib_optimal_sectors.attr, 729 &target_core_dev_attrib_hw_queue_depth.attr, 730 &target_core_dev_attrib_queue_depth.attr, 731 &target_core_dev_attrib_max_unmap_lba_count.attr, 732 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 733 &target_core_dev_attrib_unmap_granularity.attr, 734 &target_core_dev_attrib_unmap_granularity_alignment.attr, 735 &target_core_dev_attrib_max_write_same_len.attr, 736 NULL, 737 }; 738 739 static struct configfs_item_operations target_core_dev_attrib_ops = { 740 .show_attribute = target_core_dev_attrib_attr_show, 741 .store_attribute = target_core_dev_attrib_attr_store, 742 }; 743 744 static struct config_item_type target_core_dev_attrib_cit = { 745 .ct_item_ops = &target_core_dev_attrib_ops, 746 .ct_attrs = target_core_dev_attrib_attrs, 747 .ct_owner = THIS_MODULE, 748 }; 749 750 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 751 752 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 753 754 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 755 #define SE_DEV_WWN_ATTR(_name, _mode) \ 756 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 757 __CONFIGFS_EATTR(_name, _mode, \ 758 target_core_dev_wwn_show_attr_##_name, \ 759 target_core_dev_wwn_store_attr_##_name); 760 761 #define SE_DEV_WWN_ATTR_RO(_name); \ 762 do { \ 763 static struct target_core_dev_wwn_attribute \ 764 target_core_dev_wwn_##_name = \ 765 __CONFIGFS_EATTR_RO(_name, \ 766 target_core_dev_wwn_show_attr_##_name); \ 767 } while (0); 768 769 /* 770 * VPD page 0x80 Unit serial 771 */ 772 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 773 struct t10_wwn *t10_wwn, 774 char *page) 775 { 776 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 777 &t10_wwn->unit_serial[0]); 778 } 779 780 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 781 struct t10_wwn *t10_wwn, 782 const char *page, 783 size_t count) 784 { 785 struct se_device *dev = t10_wwn->t10_dev; 786 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 787 788 /* 789 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 790 * from the struct scsi_device level firmware, do not allow 791 * VPD Unit Serial to be emulated. 792 * 793 * Note this struct scsi_device could also be emulating VPD 794 * information from its drivers/scsi LLD. But for now we assume 795 * it is doing 'the right thing' wrt a world wide unique 796 * VPD Unit Serial Number that OS dependent multipath can depend on. 797 */ 798 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 799 pr_err("Underlying SCSI device firmware provided VPD" 800 " Unit Serial, ignoring request\n"); 801 return -EOPNOTSUPP; 802 } 803 804 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 805 pr_err("Emulated VPD Unit Serial exceeds" 806 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 807 return -EOVERFLOW; 808 } 809 /* 810 * Check to see if any active $FABRIC_MOD exports exist. If they 811 * do exist, fail here as changing this information on the fly 812 * (underneath the initiator side OS dependent multipath code) 813 * could cause negative effects. 814 */ 815 if (dev->export_count) { 816 pr_err("Unable to set VPD Unit Serial while" 817 " active %d $FABRIC_MOD exports exist\n", 818 dev->export_count); 819 return -EINVAL; 820 } 821 822 /* 823 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 824 * 825 * Also, strip any newline added from the userspace 826 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 827 */ 828 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 829 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 830 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 831 "%s", strstrip(buf)); 832 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 833 834 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 835 " %s\n", dev->t10_wwn.unit_serial); 836 837 return count; 838 } 839 840 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 841 842 /* 843 * VPD page 0x83 Protocol Identifier 844 */ 845 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 846 struct t10_wwn *t10_wwn, 847 char *page) 848 { 849 struct t10_vpd *vpd; 850 unsigned char buf[VPD_TMP_BUF_SIZE]; 851 ssize_t len = 0; 852 853 memset(buf, 0, VPD_TMP_BUF_SIZE); 854 855 spin_lock(&t10_wwn->t10_vpd_lock); 856 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 857 if (!vpd->protocol_identifier_set) 858 continue; 859 860 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 861 862 if (len + strlen(buf) >= PAGE_SIZE) 863 break; 864 865 len += sprintf(page+len, "%s", buf); 866 } 867 spin_unlock(&t10_wwn->t10_vpd_lock); 868 869 return len; 870 } 871 872 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 873 struct t10_wwn *t10_wwn, 874 const char *page, 875 size_t count) 876 { 877 return -ENOSYS; 878 } 879 880 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 881 882 /* 883 * Generic wrapper for dumping VPD identifiers by association. 884 */ 885 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 886 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 887 struct t10_wwn *t10_wwn, \ 888 char *page) \ 889 { \ 890 struct t10_vpd *vpd; \ 891 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 892 ssize_t len = 0; \ 893 \ 894 spin_lock(&t10_wwn->t10_vpd_lock); \ 895 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 896 if (vpd->association != _assoc) \ 897 continue; \ 898 \ 899 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 900 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 901 if (len + strlen(buf) >= PAGE_SIZE) \ 902 break; \ 903 len += sprintf(page+len, "%s", buf); \ 904 \ 905 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 906 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 907 if (len + strlen(buf) >= PAGE_SIZE) \ 908 break; \ 909 len += sprintf(page+len, "%s", buf); \ 910 \ 911 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 912 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 913 if (len + strlen(buf) >= PAGE_SIZE) \ 914 break; \ 915 len += sprintf(page+len, "%s", buf); \ 916 } \ 917 spin_unlock(&t10_wwn->t10_vpd_lock); \ 918 \ 919 return len; \ 920 } 921 922 /* 923 * VPD page 0x83 Association: Logical Unit 924 */ 925 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 926 927 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 928 struct t10_wwn *t10_wwn, 929 const char *page, 930 size_t count) 931 { 932 return -ENOSYS; 933 } 934 935 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 936 937 /* 938 * VPD page 0x83 Association: Target Port 939 */ 940 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 941 942 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 943 struct t10_wwn *t10_wwn, 944 const char *page, 945 size_t count) 946 { 947 return -ENOSYS; 948 } 949 950 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 951 952 /* 953 * VPD page 0x83 Association: SCSI Target Device 954 */ 955 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 956 957 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 958 struct t10_wwn *t10_wwn, 959 const char *page, 960 size_t count) 961 { 962 return -ENOSYS; 963 } 964 965 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 966 967 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 968 969 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 970 &target_core_dev_wwn_vpd_unit_serial.attr, 971 &target_core_dev_wwn_vpd_protocol_identifier.attr, 972 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 973 &target_core_dev_wwn_vpd_assoc_target_port.attr, 974 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 975 NULL, 976 }; 977 978 static struct configfs_item_operations target_core_dev_wwn_ops = { 979 .show_attribute = target_core_dev_wwn_attr_show, 980 .store_attribute = target_core_dev_wwn_attr_store, 981 }; 982 983 static struct config_item_type target_core_dev_wwn_cit = { 984 .ct_item_ops = &target_core_dev_wwn_ops, 985 .ct_attrs = target_core_dev_wwn_attrs, 986 .ct_owner = THIS_MODULE, 987 }; 988 989 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 990 991 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 992 993 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 994 #define SE_DEV_PR_ATTR(_name, _mode) \ 995 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 996 __CONFIGFS_EATTR(_name, _mode, \ 997 target_core_dev_pr_show_attr_##_name, \ 998 target_core_dev_pr_store_attr_##_name); 999 1000 #define SE_DEV_PR_ATTR_RO(_name); \ 1001 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1002 __CONFIGFS_EATTR_RO(_name, \ 1003 target_core_dev_pr_show_attr_##_name); 1004 1005 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1006 char *page) 1007 { 1008 struct se_node_acl *se_nacl; 1009 struct t10_pr_registration *pr_reg; 1010 char i_buf[PR_REG_ISID_ID_LEN]; 1011 1012 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1013 1014 pr_reg = dev->dev_pr_res_holder; 1015 if (!pr_reg) 1016 return sprintf(page, "No SPC-3 Reservation holder\n"); 1017 1018 se_nacl = pr_reg->pr_reg_nacl; 1019 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1020 1021 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1022 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1023 se_nacl->initiatorname, i_buf); 1024 } 1025 1026 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1027 char *page) 1028 { 1029 struct se_node_acl *se_nacl; 1030 ssize_t len; 1031 1032 se_nacl = dev->dev_reserved_node_acl; 1033 if (se_nacl) { 1034 len = sprintf(page, 1035 "SPC-2 Reservation: %s Initiator: %s\n", 1036 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1037 se_nacl->initiatorname); 1038 } else { 1039 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1040 } 1041 return len; 1042 } 1043 1044 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 1045 char *page) 1046 { 1047 int ret; 1048 1049 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1050 return sprintf(page, "Passthrough\n"); 1051 1052 spin_lock(&dev->dev_reservation_lock); 1053 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1054 ret = target_core_dev_pr_show_spc2_res(dev, page); 1055 else 1056 ret = target_core_dev_pr_show_spc3_res(dev, page); 1057 spin_unlock(&dev->dev_reservation_lock); 1058 return ret; 1059 } 1060 1061 SE_DEV_PR_ATTR_RO(res_holder); 1062 1063 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1064 struct se_device *dev, char *page) 1065 { 1066 ssize_t len = 0; 1067 1068 spin_lock(&dev->dev_reservation_lock); 1069 if (!dev->dev_pr_res_holder) { 1070 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1071 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1072 len = sprintf(page, "SPC-3 Reservation: All Target" 1073 " Ports registration\n"); 1074 } else { 1075 len = sprintf(page, "SPC-3 Reservation: Single" 1076 " Target Port registration\n"); 1077 } 1078 1079 spin_unlock(&dev->dev_reservation_lock); 1080 return len; 1081 } 1082 1083 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1084 1085 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1086 struct se_device *dev, char *page) 1087 { 1088 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 1089 } 1090 1091 SE_DEV_PR_ATTR_RO(res_pr_generation); 1092 1093 /* 1094 * res_pr_holder_tg_port 1095 */ 1096 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1097 struct se_device *dev, char *page) 1098 { 1099 struct se_node_acl *se_nacl; 1100 struct se_lun *lun; 1101 struct se_portal_group *se_tpg; 1102 struct t10_pr_registration *pr_reg; 1103 struct target_core_fabric_ops *tfo; 1104 ssize_t len = 0; 1105 1106 spin_lock(&dev->dev_reservation_lock); 1107 pr_reg = dev->dev_pr_res_holder; 1108 if (!pr_reg) { 1109 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1110 goto out_unlock; 1111 } 1112 1113 se_nacl = pr_reg->pr_reg_nacl; 1114 se_tpg = se_nacl->se_tpg; 1115 lun = pr_reg->pr_reg_tg_pt_lun; 1116 tfo = se_tpg->se_tpg_tfo; 1117 1118 len += sprintf(page+len, "SPC-3 Reservation: %s" 1119 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1120 tfo->tpg_get_wwn(se_tpg)); 1121 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1122 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1123 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1124 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1125 tfo->get_fabric_name(), lun->unpacked_lun); 1126 1127 out_unlock: 1128 spin_unlock(&dev->dev_reservation_lock); 1129 return len; 1130 } 1131 1132 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1133 1134 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1135 struct se_device *dev, char *page) 1136 { 1137 struct target_core_fabric_ops *tfo; 1138 struct t10_pr_registration *pr_reg; 1139 unsigned char buf[384]; 1140 char i_buf[PR_REG_ISID_ID_LEN]; 1141 ssize_t len = 0; 1142 int reg_count = 0; 1143 1144 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1145 1146 spin_lock(&dev->t10_pr.registration_lock); 1147 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1148 pr_reg_list) { 1149 1150 memset(buf, 0, 384); 1151 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1152 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1153 core_pr_dump_initiator_port(pr_reg, i_buf, 1154 PR_REG_ISID_ID_LEN); 1155 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1156 tfo->get_fabric_name(), 1157 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1158 pr_reg->pr_res_generation); 1159 1160 if (len + strlen(buf) >= PAGE_SIZE) 1161 break; 1162 1163 len += sprintf(page+len, "%s", buf); 1164 reg_count++; 1165 } 1166 spin_unlock(&dev->t10_pr.registration_lock); 1167 1168 if (!reg_count) 1169 len += sprintf(page+len, "None\n"); 1170 1171 return len; 1172 } 1173 1174 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1175 1176 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1177 struct se_device *dev, char *page) 1178 { 1179 struct t10_pr_registration *pr_reg; 1180 ssize_t len = 0; 1181 1182 spin_lock(&dev->dev_reservation_lock); 1183 pr_reg = dev->dev_pr_res_holder; 1184 if (pr_reg) { 1185 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1186 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1187 } else { 1188 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1189 } 1190 1191 spin_unlock(&dev->dev_reservation_lock); 1192 return len; 1193 } 1194 1195 SE_DEV_PR_ATTR_RO(res_pr_type); 1196 1197 static ssize_t target_core_dev_pr_show_attr_res_type( 1198 struct se_device *dev, char *page) 1199 { 1200 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1201 return sprintf(page, "SPC_PASSTHROUGH\n"); 1202 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1203 return sprintf(page, "SPC2_RESERVATIONS\n"); 1204 else 1205 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1206 } 1207 1208 SE_DEV_PR_ATTR_RO(res_type); 1209 1210 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1211 struct se_device *dev, char *page) 1212 { 1213 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1214 return 0; 1215 1216 return sprintf(page, "APTPL Bit Status: %s\n", 1217 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1218 } 1219 1220 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1221 1222 /* 1223 * res_aptpl_metadata 1224 */ 1225 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1226 struct se_device *dev, char *page) 1227 { 1228 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1229 return 0; 1230 1231 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1232 } 1233 1234 enum { 1235 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1236 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1237 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1238 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1239 }; 1240 1241 static match_table_t tokens = { 1242 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1243 {Opt_initiator_node, "initiator_node=%s"}, 1244 {Opt_initiator_sid, "initiator_sid=%s"}, 1245 {Opt_sa_res_key, "sa_res_key=%s"}, 1246 {Opt_res_holder, "res_holder=%d"}, 1247 {Opt_res_type, "res_type=%d"}, 1248 {Opt_res_scope, "res_scope=%d"}, 1249 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1250 {Opt_mapped_lun, "mapped_lun=%d"}, 1251 {Opt_target_fabric, "target_fabric=%s"}, 1252 {Opt_target_node, "target_node=%s"}, 1253 {Opt_tpgt, "tpgt=%d"}, 1254 {Opt_port_rtpi, "port_rtpi=%d"}, 1255 {Opt_target_lun, "target_lun=%d"}, 1256 {Opt_err, NULL} 1257 }; 1258 1259 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1260 struct se_device *dev, 1261 const char *page, 1262 size_t count) 1263 { 1264 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1265 unsigned char *t_fabric = NULL, *t_port = NULL; 1266 char *orig, *ptr, *arg_p, *opts; 1267 substring_t args[MAX_OPT_ARGS]; 1268 unsigned long long tmp_ll; 1269 u64 sa_res_key = 0; 1270 u32 mapped_lun = 0, target_lun = 0; 1271 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1272 u16 port_rpti = 0, tpgt = 0; 1273 u8 type = 0, scope; 1274 1275 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1276 return 0; 1277 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1278 return 0; 1279 1280 if (dev->export_count) { 1281 pr_debug("Unable to process APTPL metadata while" 1282 " active fabric exports exist\n"); 1283 return -EINVAL; 1284 } 1285 1286 opts = kstrdup(page, GFP_KERNEL); 1287 if (!opts) 1288 return -ENOMEM; 1289 1290 orig = opts; 1291 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1292 if (!*ptr) 1293 continue; 1294 1295 token = match_token(ptr, tokens, args); 1296 switch (token) { 1297 case Opt_initiator_fabric: 1298 i_fabric = match_strdup(&args[0]); 1299 if (!i_fabric) { 1300 ret = -ENOMEM; 1301 goto out; 1302 } 1303 break; 1304 case Opt_initiator_node: 1305 i_port = match_strdup(&args[0]); 1306 if (!i_port) { 1307 ret = -ENOMEM; 1308 goto out; 1309 } 1310 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1311 pr_err("APTPL metadata initiator_node=" 1312 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1313 PR_APTPL_MAX_IPORT_LEN); 1314 ret = -EINVAL; 1315 break; 1316 } 1317 break; 1318 case Opt_initiator_sid: 1319 isid = match_strdup(&args[0]); 1320 if (!isid) { 1321 ret = -ENOMEM; 1322 goto out; 1323 } 1324 if (strlen(isid) >= PR_REG_ISID_LEN) { 1325 pr_err("APTPL metadata initiator_isid" 1326 "= exceeds PR_REG_ISID_LEN: %d\n", 1327 PR_REG_ISID_LEN); 1328 ret = -EINVAL; 1329 break; 1330 } 1331 break; 1332 case Opt_sa_res_key: 1333 arg_p = match_strdup(&args[0]); 1334 if (!arg_p) { 1335 ret = -ENOMEM; 1336 goto out; 1337 } 1338 ret = kstrtoull(arg_p, 0, &tmp_ll); 1339 if (ret < 0) { 1340 pr_err("kstrtoull() failed for" 1341 " sa_res_key=\n"); 1342 goto out; 1343 } 1344 sa_res_key = (u64)tmp_ll; 1345 break; 1346 /* 1347 * PR APTPL Metadata for Reservation 1348 */ 1349 case Opt_res_holder: 1350 match_int(args, &arg); 1351 res_holder = arg; 1352 break; 1353 case Opt_res_type: 1354 match_int(args, &arg); 1355 type = (u8)arg; 1356 break; 1357 case Opt_res_scope: 1358 match_int(args, &arg); 1359 scope = (u8)arg; 1360 break; 1361 case Opt_res_all_tg_pt: 1362 match_int(args, &arg); 1363 all_tg_pt = (int)arg; 1364 break; 1365 case Opt_mapped_lun: 1366 match_int(args, &arg); 1367 mapped_lun = (u32)arg; 1368 break; 1369 /* 1370 * PR APTPL Metadata for Target Port 1371 */ 1372 case Opt_target_fabric: 1373 t_fabric = match_strdup(&args[0]); 1374 if (!t_fabric) { 1375 ret = -ENOMEM; 1376 goto out; 1377 } 1378 break; 1379 case Opt_target_node: 1380 t_port = match_strdup(&args[0]); 1381 if (!t_port) { 1382 ret = -ENOMEM; 1383 goto out; 1384 } 1385 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1386 pr_err("APTPL metadata target_node=" 1387 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1388 PR_APTPL_MAX_TPORT_LEN); 1389 ret = -EINVAL; 1390 break; 1391 } 1392 break; 1393 case Opt_tpgt: 1394 match_int(args, &arg); 1395 tpgt = (u16)arg; 1396 break; 1397 case Opt_port_rtpi: 1398 match_int(args, &arg); 1399 port_rpti = (u16)arg; 1400 break; 1401 case Opt_target_lun: 1402 match_int(args, &arg); 1403 target_lun = (u32)arg; 1404 break; 1405 default: 1406 break; 1407 } 1408 } 1409 1410 if (!i_port || !t_port || !sa_res_key) { 1411 pr_err("Illegal parameters for APTPL registration\n"); 1412 ret = -EINVAL; 1413 goto out; 1414 } 1415 1416 if (res_holder && !(type)) { 1417 pr_err("Illegal PR type: 0x%02x for reservation" 1418 " holder\n", type); 1419 ret = -EINVAL; 1420 goto out; 1421 } 1422 1423 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1424 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1425 res_holder, all_tg_pt, type); 1426 out: 1427 kfree(i_fabric); 1428 kfree(i_port); 1429 kfree(isid); 1430 kfree(t_fabric); 1431 kfree(t_port); 1432 kfree(orig); 1433 return (ret == 0) ? count : ret; 1434 } 1435 1436 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1437 1438 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1439 1440 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1441 &target_core_dev_pr_res_holder.attr, 1442 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1443 &target_core_dev_pr_res_pr_generation.attr, 1444 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1445 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1446 &target_core_dev_pr_res_pr_type.attr, 1447 &target_core_dev_pr_res_type.attr, 1448 &target_core_dev_pr_res_aptpl_active.attr, 1449 &target_core_dev_pr_res_aptpl_metadata.attr, 1450 NULL, 1451 }; 1452 1453 static struct configfs_item_operations target_core_dev_pr_ops = { 1454 .show_attribute = target_core_dev_pr_attr_show, 1455 .store_attribute = target_core_dev_pr_attr_store, 1456 }; 1457 1458 static struct config_item_type target_core_dev_pr_cit = { 1459 .ct_item_ops = &target_core_dev_pr_ops, 1460 .ct_attrs = target_core_dev_pr_attrs, 1461 .ct_owner = THIS_MODULE, 1462 }; 1463 1464 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1465 1466 /* Start functions for struct config_item_type target_core_dev_cit */ 1467 1468 static ssize_t target_core_show_dev_info(void *p, char *page) 1469 { 1470 struct se_device *dev = p; 1471 struct se_subsystem_api *t = dev->transport; 1472 int bl = 0; 1473 ssize_t read_bytes = 0; 1474 1475 transport_dump_dev_state(dev, page, &bl); 1476 read_bytes += bl; 1477 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes); 1478 return read_bytes; 1479 } 1480 1481 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1482 .attr = { .ca_owner = THIS_MODULE, 1483 .ca_name = "info", 1484 .ca_mode = S_IRUGO }, 1485 .show = target_core_show_dev_info, 1486 .store = NULL, 1487 }; 1488 1489 static ssize_t target_core_store_dev_control( 1490 void *p, 1491 const char *page, 1492 size_t count) 1493 { 1494 struct se_device *dev = p; 1495 struct se_subsystem_api *t = dev->transport; 1496 1497 return t->set_configfs_dev_params(dev, page, count); 1498 } 1499 1500 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1501 .attr = { .ca_owner = THIS_MODULE, 1502 .ca_name = "control", 1503 .ca_mode = S_IWUSR }, 1504 .show = NULL, 1505 .store = target_core_store_dev_control, 1506 }; 1507 1508 static ssize_t target_core_show_dev_alias(void *p, char *page) 1509 { 1510 struct se_device *dev = p; 1511 1512 if (!(dev->dev_flags & DF_USING_ALIAS)) 1513 return 0; 1514 1515 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1516 } 1517 1518 static ssize_t target_core_store_dev_alias( 1519 void *p, 1520 const char *page, 1521 size_t count) 1522 { 1523 struct se_device *dev = p; 1524 struct se_hba *hba = dev->se_hba; 1525 ssize_t read_bytes; 1526 1527 if (count > (SE_DEV_ALIAS_LEN-1)) { 1528 pr_err("alias count: %d exceeds" 1529 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1530 SE_DEV_ALIAS_LEN-1); 1531 return -EINVAL; 1532 } 1533 1534 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1535 if (!read_bytes) 1536 return -EINVAL; 1537 if (dev->dev_alias[read_bytes - 1] == '\n') 1538 dev->dev_alias[read_bytes - 1] = '\0'; 1539 1540 dev->dev_flags |= DF_USING_ALIAS; 1541 1542 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1543 config_item_name(&hba->hba_group.cg_item), 1544 config_item_name(&dev->dev_group.cg_item), 1545 dev->dev_alias); 1546 1547 return read_bytes; 1548 } 1549 1550 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1551 .attr = { .ca_owner = THIS_MODULE, 1552 .ca_name = "alias", 1553 .ca_mode = S_IRUGO | S_IWUSR }, 1554 .show = target_core_show_dev_alias, 1555 .store = target_core_store_dev_alias, 1556 }; 1557 1558 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1559 { 1560 struct se_device *dev = p; 1561 1562 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1563 return 0; 1564 1565 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1566 } 1567 1568 static ssize_t target_core_store_dev_udev_path( 1569 void *p, 1570 const char *page, 1571 size_t count) 1572 { 1573 struct se_device *dev = p; 1574 struct se_hba *hba = dev->se_hba; 1575 ssize_t read_bytes; 1576 1577 if (count > (SE_UDEV_PATH_LEN-1)) { 1578 pr_err("udev_path count: %d exceeds" 1579 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1580 SE_UDEV_PATH_LEN-1); 1581 return -EINVAL; 1582 } 1583 1584 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1585 "%s", page); 1586 if (!read_bytes) 1587 return -EINVAL; 1588 if (dev->udev_path[read_bytes - 1] == '\n') 1589 dev->udev_path[read_bytes - 1] = '\0'; 1590 1591 dev->dev_flags |= DF_USING_UDEV_PATH; 1592 1593 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1594 config_item_name(&hba->hba_group.cg_item), 1595 config_item_name(&dev->dev_group.cg_item), 1596 dev->udev_path); 1597 1598 return read_bytes; 1599 } 1600 1601 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1602 .attr = { .ca_owner = THIS_MODULE, 1603 .ca_name = "udev_path", 1604 .ca_mode = S_IRUGO | S_IWUSR }, 1605 .show = target_core_show_dev_udev_path, 1606 .store = target_core_store_dev_udev_path, 1607 }; 1608 1609 static ssize_t target_core_show_dev_enable(void *p, char *page) 1610 { 1611 struct se_device *dev = p; 1612 1613 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1614 } 1615 1616 static ssize_t target_core_store_dev_enable( 1617 void *p, 1618 const char *page, 1619 size_t count) 1620 { 1621 struct se_device *dev = p; 1622 char *ptr; 1623 int ret; 1624 1625 ptr = strstr(page, "1"); 1626 if (!ptr) { 1627 pr_err("For dev_enable ops, only valid value" 1628 " is \"1\"\n"); 1629 return -EINVAL; 1630 } 1631 1632 ret = target_configure_device(dev); 1633 if (ret) 1634 return ret; 1635 return count; 1636 } 1637 1638 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1639 .attr = { .ca_owner = THIS_MODULE, 1640 .ca_name = "enable", 1641 .ca_mode = S_IRUGO | S_IWUSR }, 1642 .show = target_core_show_dev_enable, 1643 .store = target_core_store_dev_enable, 1644 }; 1645 1646 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1647 { 1648 struct se_device *dev = p; 1649 struct config_item *lu_ci; 1650 struct t10_alua_lu_gp *lu_gp; 1651 struct t10_alua_lu_gp_member *lu_gp_mem; 1652 ssize_t len = 0; 1653 1654 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1655 if (!lu_gp_mem) 1656 return 0; 1657 1658 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1659 lu_gp = lu_gp_mem->lu_gp; 1660 if (lu_gp) { 1661 lu_ci = &lu_gp->lu_gp_group.cg_item; 1662 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1663 config_item_name(lu_ci), lu_gp->lu_gp_id); 1664 } 1665 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1666 1667 return len; 1668 } 1669 1670 static ssize_t target_core_store_alua_lu_gp( 1671 void *p, 1672 const char *page, 1673 size_t count) 1674 { 1675 struct se_device *dev = p; 1676 struct se_hba *hba = dev->se_hba; 1677 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1678 struct t10_alua_lu_gp_member *lu_gp_mem; 1679 unsigned char buf[LU_GROUP_NAME_BUF]; 1680 int move = 0; 1681 1682 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1683 if (!lu_gp_mem) 1684 return 0; 1685 1686 if (count > LU_GROUP_NAME_BUF) { 1687 pr_err("ALUA LU Group Alias too large!\n"); 1688 return -EINVAL; 1689 } 1690 memset(buf, 0, LU_GROUP_NAME_BUF); 1691 memcpy(buf, page, count); 1692 /* 1693 * Any ALUA logical unit alias besides "NULL" means we will be 1694 * making a new group association. 1695 */ 1696 if (strcmp(strstrip(buf), "NULL")) { 1697 /* 1698 * core_alua_get_lu_gp_by_name() will increment reference to 1699 * struct t10_alua_lu_gp. This reference is released with 1700 * core_alua_get_lu_gp_by_name below(). 1701 */ 1702 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1703 if (!lu_gp_new) 1704 return -ENODEV; 1705 } 1706 1707 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1708 lu_gp = lu_gp_mem->lu_gp; 1709 if (lu_gp) { 1710 /* 1711 * Clearing an existing lu_gp association, and replacing 1712 * with NULL 1713 */ 1714 if (!lu_gp_new) { 1715 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1716 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1717 " %hu\n", 1718 config_item_name(&hba->hba_group.cg_item), 1719 config_item_name(&dev->dev_group.cg_item), 1720 config_item_name(&lu_gp->lu_gp_group.cg_item), 1721 lu_gp->lu_gp_id); 1722 1723 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1724 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1725 1726 return count; 1727 } 1728 /* 1729 * Removing existing association of lu_gp_mem with lu_gp 1730 */ 1731 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1732 move = 1; 1733 } 1734 /* 1735 * Associate lu_gp_mem with lu_gp_new. 1736 */ 1737 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1738 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1739 1740 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1741 " core/alua/lu_gps/%s, ID: %hu\n", 1742 (move) ? "Moving" : "Adding", 1743 config_item_name(&hba->hba_group.cg_item), 1744 config_item_name(&dev->dev_group.cg_item), 1745 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1746 lu_gp_new->lu_gp_id); 1747 1748 core_alua_put_lu_gp_from_name(lu_gp_new); 1749 return count; 1750 } 1751 1752 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1753 .attr = { .ca_owner = THIS_MODULE, 1754 .ca_name = "alua_lu_gp", 1755 .ca_mode = S_IRUGO | S_IWUSR }, 1756 .show = target_core_show_alua_lu_gp, 1757 .store = target_core_store_alua_lu_gp, 1758 }; 1759 1760 static ssize_t target_core_show_dev_lba_map(void *p, char *page) 1761 { 1762 struct se_device *dev = p; 1763 struct t10_alua_lba_map *map; 1764 struct t10_alua_lba_map_member *mem; 1765 char *b = page; 1766 int bl = 0; 1767 char state; 1768 1769 spin_lock(&dev->t10_alua.lba_map_lock); 1770 if (!list_empty(&dev->t10_alua.lba_map_list)) 1771 bl += sprintf(b + bl, "%u %u\n", 1772 dev->t10_alua.lba_map_segment_size, 1773 dev->t10_alua.lba_map_segment_multiplier); 1774 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 1775 bl += sprintf(b + bl, "%llu %llu", 1776 map->lba_map_first_lba, map->lba_map_last_lba); 1777 list_for_each_entry(mem, &map->lba_map_mem_list, 1778 lba_map_mem_list) { 1779 switch (mem->lba_map_mem_alua_state) { 1780 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 1781 state = 'O'; 1782 break; 1783 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 1784 state = 'A'; 1785 break; 1786 case ALUA_ACCESS_STATE_STANDBY: 1787 state = 'S'; 1788 break; 1789 case ALUA_ACCESS_STATE_UNAVAILABLE: 1790 state = 'U'; 1791 break; 1792 default: 1793 state = '.'; 1794 break; 1795 } 1796 bl += sprintf(b + bl, " %d:%c", 1797 mem->lba_map_mem_alua_pg_id, state); 1798 } 1799 bl += sprintf(b + bl, "\n"); 1800 } 1801 spin_unlock(&dev->t10_alua.lba_map_lock); 1802 return bl; 1803 } 1804 1805 static ssize_t target_core_store_dev_lba_map( 1806 void *p, 1807 const char *page, 1808 size_t count) 1809 { 1810 struct se_device *dev = p; 1811 struct t10_alua_lba_map *lba_map = NULL; 1812 struct list_head lba_list; 1813 char *map_entries, *ptr; 1814 char state; 1815 int pg_num = -1, pg; 1816 int ret = 0, num = 0, pg_id, alua_state; 1817 unsigned long start_lba = -1, end_lba = -1; 1818 unsigned long segment_size = -1, segment_mult = -1; 1819 1820 map_entries = kstrdup(page, GFP_KERNEL); 1821 if (!map_entries) 1822 return -ENOMEM; 1823 1824 INIT_LIST_HEAD(&lba_list); 1825 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 1826 if (!*ptr) 1827 continue; 1828 1829 if (num == 0) { 1830 if (sscanf(ptr, "%lu %lu\n", 1831 &segment_size, &segment_mult) != 2) { 1832 pr_err("Invalid line %d\n", num); 1833 ret = -EINVAL; 1834 break; 1835 } 1836 num++; 1837 continue; 1838 } 1839 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 1840 pr_err("Invalid line %d\n", num); 1841 ret = -EINVAL; 1842 break; 1843 } 1844 ptr = strchr(ptr, ' '); 1845 if (!ptr) { 1846 pr_err("Invalid line %d, missing end lba\n", num); 1847 ret = -EINVAL; 1848 break; 1849 } 1850 ptr++; 1851 ptr = strchr(ptr, ' '); 1852 if (!ptr) { 1853 pr_err("Invalid line %d, missing state definitions\n", 1854 num); 1855 ret = -EINVAL; 1856 break; 1857 } 1858 ptr++; 1859 lba_map = core_alua_allocate_lba_map(&lba_list, 1860 start_lba, end_lba); 1861 if (IS_ERR(lba_map)) { 1862 ret = PTR_ERR(lba_map); 1863 break; 1864 } 1865 pg = 0; 1866 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 1867 switch (state) { 1868 case 'O': 1869 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 1870 break; 1871 case 'A': 1872 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 1873 break; 1874 case 'S': 1875 alua_state = ALUA_ACCESS_STATE_STANDBY; 1876 break; 1877 case 'U': 1878 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 1879 break; 1880 default: 1881 pr_err("Invalid ALUA state '%c'\n", state); 1882 ret = -EINVAL; 1883 goto out; 1884 } 1885 1886 ret = core_alua_allocate_lba_map_mem(lba_map, 1887 pg_id, alua_state); 1888 if (ret) { 1889 pr_err("Invalid target descriptor %d:%c " 1890 "at line %d\n", 1891 pg_id, state, num); 1892 break; 1893 } 1894 pg++; 1895 ptr = strchr(ptr, ' '); 1896 if (ptr) 1897 ptr++; 1898 else 1899 break; 1900 } 1901 if (pg_num == -1) 1902 pg_num = pg; 1903 else if (pg != pg_num) { 1904 pr_err("Only %d from %d port groups definitions " 1905 "at line %d\n", pg, pg_num, num); 1906 ret = -EINVAL; 1907 break; 1908 } 1909 num++; 1910 } 1911 out: 1912 if (ret) { 1913 core_alua_free_lba_map(&lba_list); 1914 count = ret; 1915 } else 1916 core_alua_set_lba_map(dev, &lba_list, 1917 segment_size, segment_mult); 1918 kfree(map_entries); 1919 return count; 1920 } 1921 1922 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = { 1923 .attr = { .ca_owner = THIS_MODULE, 1924 .ca_name = "lba_map", 1925 .ca_mode = S_IRUGO | S_IWUSR }, 1926 .show = target_core_show_dev_lba_map, 1927 .store = target_core_store_dev_lba_map, 1928 }; 1929 1930 static struct configfs_attribute *lio_core_dev_attrs[] = { 1931 &target_core_attr_dev_info.attr, 1932 &target_core_attr_dev_control.attr, 1933 &target_core_attr_dev_alias.attr, 1934 &target_core_attr_dev_udev_path.attr, 1935 &target_core_attr_dev_enable.attr, 1936 &target_core_attr_dev_alua_lu_gp.attr, 1937 &target_core_attr_dev_lba_map.attr, 1938 NULL, 1939 }; 1940 1941 static void target_core_dev_release(struct config_item *item) 1942 { 1943 struct config_group *dev_cg = to_config_group(item); 1944 struct se_device *dev = 1945 container_of(dev_cg, struct se_device, dev_group); 1946 1947 kfree(dev_cg->default_groups); 1948 target_free_device(dev); 1949 } 1950 1951 static ssize_t target_core_dev_show(struct config_item *item, 1952 struct configfs_attribute *attr, 1953 char *page) 1954 { 1955 struct config_group *dev_cg = to_config_group(item); 1956 struct se_device *dev = 1957 container_of(dev_cg, struct se_device, dev_group); 1958 struct target_core_configfs_attribute *tc_attr = container_of( 1959 attr, struct target_core_configfs_attribute, attr); 1960 1961 if (!tc_attr->show) 1962 return -EINVAL; 1963 1964 return tc_attr->show(dev, page); 1965 } 1966 1967 static ssize_t target_core_dev_store(struct config_item *item, 1968 struct configfs_attribute *attr, 1969 const char *page, size_t count) 1970 { 1971 struct config_group *dev_cg = to_config_group(item); 1972 struct se_device *dev = 1973 container_of(dev_cg, struct se_device, dev_group); 1974 struct target_core_configfs_attribute *tc_attr = container_of( 1975 attr, struct target_core_configfs_attribute, attr); 1976 1977 if (!tc_attr->store) 1978 return -EINVAL; 1979 1980 return tc_attr->store(dev, page, count); 1981 } 1982 1983 static struct configfs_item_operations target_core_dev_item_ops = { 1984 .release = target_core_dev_release, 1985 .show_attribute = target_core_dev_show, 1986 .store_attribute = target_core_dev_store, 1987 }; 1988 1989 static struct config_item_type target_core_dev_cit = { 1990 .ct_item_ops = &target_core_dev_item_ops, 1991 .ct_attrs = lio_core_dev_attrs, 1992 .ct_owner = THIS_MODULE, 1993 }; 1994 1995 /* End functions for struct config_item_type target_core_dev_cit */ 1996 1997 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 1998 1999 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2000 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2001 static struct target_core_alua_lu_gp_attribute \ 2002 target_core_alua_lu_gp_##_name = \ 2003 __CONFIGFS_EATTR(_name, _mode, \ 2004 target_core_alua_lu_gp_show_attr_##_name, \ 2005 target_core_alua_lu_gp_store_attr_##_name); 2006 2007 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2008 static struct target_core_alua_lu_gp_attribute \ 2009 target_core_alua_lu_gp_##_name = \ 2010 __CONFIGFS_EATTR_RO(_name, \ 2011 target_core_alua_lu_gp_show_attr_##_name); 2012 2013 /* 2014 * lu_gp_id 2015 */ 2016 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2017 struct t10_alua_lu_gp *lu_gp, 2018 char *page) 2019 { 2020 if (!lu_gp->lu_gp_valid_id) 2021 return 0; 2022 2023 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2024 } 2025 2026 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2027 struct t10_alua_lu_gp *lu_gp, 2028 const char *page, 2029 size_t count) 2030 { 2031 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2032 unsigned long lu_gp_id; 2033 int ret; 2034 2035 ret = kstrtoul(page, 0, &lu_gp_id); 2036 if (ret < 0) { 2037 pr_err("kstrtoul() returned %d for" 2038 " lu_gp_id\n", ret); 2039 return ret; 2040 } 2041 if (lu_gp_id > 0x0000ffff) { 2042 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2043 " 0x0000ffff\n", lu_gp_id); 2044 return -EINVAL; 2045 } 2046 2047 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2048 if (ret < 0) 2049 return -EINVAL; 2050 2051 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2052 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2053 config_item_name(&alua_lu_gp_cg->cg_item), 2054 lu_gp->lu_gp_id); 2055 2056 return count; 2057 } 2058 2059 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2060 2061 /* 2062 * members 2063 */ 2064 static ssize_t target_core_alua_lu_gp_show_attr_members( 2065 struct t10_alua_lu_gp *lu_gp, 2066 char *page) 2067 { 2068 struct se_device *dev; 2069 struct se_hba *hba; 2070 struct t10_alua_lu_gp_member *lu_gp_mem; 2071 ssize_t len = 0, cur_len; 2072 unsigned char buf[LU_GROUP_NAME_BUF]; 2073 2074 memset(buf, 0, LU_GROUP_NAME_BUF); 2075 2076 spin_lock(&lu_gp->lu_gp_lock); 2077 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2078 dev = lu_gp_mem->lu_gp_mem_dev; 2079 hba = dev->se_hba; 2080 2081 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2082 config_item_name(&hba->hba_group.cg_item), 2083 config_item_name(&dev->dev_group.cg_item)); 2084 cur_len++; /* Extra byte for NULL terminator */ 2085 2086 if ((cur_len + len) > PAGE_SIZE) { 2087 pr_warn("Ran out of lu_gp_show_attr" 2088 "_members buffer\n"); 2089 break; 2090 } 2091 memcpy(page+len, buf, cur_len); 2092 len += cur_len; 2093 } 2094 spin_unlock(&lu_gp->lu_gp_lock); 2095 2096 return len; 2097 } 2098 2099 SE_DEV_ALUA_LU_ATTR_RO(members); 2100 2101 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2102 2103 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2104 &target_core_alua_lu_gp_lu_gp_id.attr, 2105 &target_core_alua_lu_gp_members.attr, 2106 NULL, 2107 }; 2108 2109 static void target_core_alua_lu_gp_release(struct config_item *item) 2110 { 2111 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2112 struct t10_alua_lu_gp, lu_gp_group); 2113 2114 core_alua_free_lu_gp(lu_gp); 2115 } 2116 2117 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2118 .release = target_core_alua_lu_gp_release, 2119 .show_attribute = target_core_alua_lu_gp_attr_show, 2120 .store_attribute = target_core_alua_lu_gp_attr_store, 2121 }; 2122 2123 static struct config_item_type target_core_alua_lu_gp_cit = { 2124 .ct_item_ops = &target_core_alua_lu_gp_ops, 2125 .ct_attrs = target_core_alua_lu_gp_attrs, 2126 .ct_owner = THIS_MODULE, 2127 }; 2128 2129 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2130 2131 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2132 2133 static struct config_group *target_core_alua_create_lu_gp( 2134 struct config_group *group, 2135 const char *name) 2136 { 2137 struct t10_alua_lu_gp *lu_gp; 2138 struct config_group *alua_lu_gp_cg = NULL; 2139 struct config_item *alua_lu_gp_ci = NULL; 2140 2141 lu_gp = core_alua_allocate_lu_gp(name, 0); 2142 if (IS_ERR(lu_gp)) 2143 return NULL; 2144 2145 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2146 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2147 2148 config_group_init_type_name(alua_lu_gp_cg, name, 2149 &target_core_alua_lu_gp_cit); 2150 2151 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2152 " Group: core/alua/lu_gps/%s\n", 2153 config_item_name(alua_lu_gp_ci)); 2154 2155 return alua_lu_gp_cg; 2156 2157 } 2158 2159 static void target_core_alua_drop_lu_gp( 2160 struct config_group *group, 2161 struct config_item *item) 2162 { 2163 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2164 struct t10_alua_lu_gp, lu_gp_group); 2165 2166 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2167 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2168 config_item_name(item), lu_gp->lu_gp_id); 2169 /* 2170 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2171 * -> target_core_alua_lu_gp_release() 2172 */ 2173 config_item_put(item); 2174 } 2175 2176 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2177 .make_group = &target_core_alua_create_lu_gp, 2178 .drop_item = &target_core_alua_drop_lu_gp, 2179 }; 2180 2181 static struct config_item_type target_core_alua_lu_gps_cit = { 2182 .ct_item_ops = NULL, 2183 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2184 .ct_owner = THIS_MODULE, 2185 }; 2186 2187 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2188 2189 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2190 2191 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2192 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2193 static struct target_core_alua_tg_pt_gp_attribute \ 2194 target_core_alua_tg_pt_gp_##_name = \ 2195 __CONFIGFS_EATTR(_name, _mode, \ 2196 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2197 target_core_alua_tg_pt_gp_store_attr_##_name); 2198 2199 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2200 static struct target_core_alua_tg_pt_gp_attribute \ 2201 target_core_alua_tg_pt_gp_##_name = \ 2202 __CONFIGFS_EATTR_RO(_name, \ 2203 target_core_alua_tg_pt_gp_show_attr_##_name); 2204 2205 /* 2206 * alua_access_state 2207 */ 2208 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2209 struct t10_alua_tg_pt_gp *tg_pt_gp, 2210 char *page) 2211 { 2212 return sprintf(page, "%d\n", 2213 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2214 } 2215 2216 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2217 struct t10_alua_tg_pt_gp *tg_pt_gp, 2218 const char *page, 2219 size_t count) 2220 { 2221 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2222 unsigned long tmp; 2223 int new_state, ret; 2224 2225 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2226 pr_err("Unable to do implicit ALUA on non valid" 2227 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2228 return -EINVAL; 2229 } 2230 2231 ret = kstrtoul(page, 0, &tmp); 2232 if (ret < 0) { 2233 pr_err("Unable to extract new ALUA access state from" 2234 " %s\n", page); 2235 return ret; 2236 } 2237 new_state = (int)tmp; 2238 2239 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2240 pr_err("Unable to process implicit configfs ALUA" 2241 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2242 return -EINVAL; 2243 } 2244 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2245 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2246 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2247 pr_err("Unable to process implicit configfs ALUA transition" 2248 " while explicit ALUA management is enabled\n"); 2249 return -EINVAL; 2250 } 2251 2252 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2253 NULL, NULL, new_state, 0); 2254 return (!ret) ? count : -EINVAL; 2255 } 2256 2257 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2258 2259 /* 2260 * alua_access_status 2261 */ 2262 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2263 struct t10_alua_tg_pt_gp *tg_pt_gp, 2264 char *page) 2265 { 2266 return sprintf(page, "%s\n", 2267 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2268 } 2269 2270 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2271 struct t10_alua_tg_pt_gp *tg_pt_gp, 2272 const char *page, 2273 size_t count) 2274 { 2275 unsigned long tmp; 2276 int new_status, ret; 2277 2278 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2279 pr_err("Unable to do set ALUA access status on non" 2280 " valid tg_pt_gp ID: %hu\n", 2281 tg_pt_gp->tg_pt_gp_valid_id); 2282 return -EINVAL; 2283 } 2284 2285 ret = kstrtoul(page, 0, &tmp); 2286 if (ret < 0) { 2287 pr_err("Unable to extract new ALUA access status" 2288 " from %s\n", page); 2289 return ret; 2290 } 2291 new_status = (int)tmp; 2292 2293 if ((new_status != ALUA_STATUS_NONE) && 2294 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2295 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2296 pr_err("Illegal ALUA access status: 0x%02x\n", 2297 new_status); 2298 return -EINVAL; 2299 } 2300 2301 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2302 return count; 2303 } 2304 2305 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2306 2307 /* 2308 * alua_access_type 2309 */ 2310 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2311 struct t10_alua_tg_pt_gp *tg_pt_gp, 2312 char *page) 2313 { 2314 return core_alua_show_access_type(tg_pt_gp, page); 2315 } 2316 2317 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2318 struct t10_alua_tg_pt_gp *tg_pt_gp, 2319 const char *page, 2320 size_t count) 2321 { 2322 return core_alua_store_access_type(tg_pt_gp, page, count); 2323 } 2324 2325 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2326 2327 /* 2328 * alua_supported_states 2329 */ 2330 2331 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \ 2332 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \ 2333 struct t10_alua_tg_pt_gp *t, char *p) \ 2334 { \ 2335 return sprintf(p, "%d\n", !!(t->_var & _bit)); \ 2336 } 2337 2338 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \ 2339 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\ 2340 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \ 2341 { \ 2342 unsigned long tmp; \ 2343 int ret; \ 2344 \ 2345 if (!t->tg_pt_gp_valid_id) { \ 2346 pr_err("Unable to do set ##_name ALUA state on non" \ 2347 " valid tg_pt_gp ID: %hu\n", \ 2348 t->tg_pt_gp_valid_id); \ 2349 return -EINVAL; \ 2350 } \ 2351 \ 2352 ret = kstrtoul(p, 0, &tmp); \ 2353 if (ret < 0) { \ 2354 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2355 return -EINVAL; \ 2356 } \ 2357 if (tmp > 1) { \ 2358 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2359 return -EINVAL; \ 2360 } \ 2361 if (!tmp) \ 2362 t->_var |= _bit; \ 2363 else \ 2364 t->_var &= ~_bit; \ 2365 \ 2366 return c; \ 2367 } 2368 2369 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning, 2370 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2371 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning, 2372 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2373 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR); 2374 2375 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline, 2376 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2377 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline, 2378 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2379 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR); 2380 2381 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent, 2382 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2383 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent, 2384 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2385 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO); 2386 2387 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable, 2388 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2389 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable, 2390 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2391 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR); 2392 2393 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby, 2394 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2395 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby, 2396 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2397 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR); 2398 2399 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized, 2400 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2401 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized, 2402 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2403 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR); 2404 2405 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized, 2406 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2407 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized, 2408 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2409 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR); 2410 2411 /* 2412 * alua_write_metadata 2413 */ 2414 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2415 struct t10_alua_tg_pt_gp *tg_pt_gp, 2416 char *page) 2417 { 2418 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2419 } 2420 2421 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2422 struct t10_alua_tg_pt_gp *tg_pt_gp, 2423 const char *page, 2424 size_t count) 2425 { 2426 unsigned long tmp; 2427 int ret; 2428 2429 ret = kstrtoul(page, 0, &tmp); 2430 if (ret < 0) { 2431 pr_err("Unable to extract alua_write_metadata\n"); 2432 return ret; 2433 } 2434 2435 if ((tmp != 0) && (tmp != 1)) { 2436 pr_err("Illegal value for alua_write_metadata:" 2437 " %lu\n", tmp); 2438 return -EINVAL; 2439 } 2440 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2441 2442 return count; 2443 } 2444 2445 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2446 2447 2448 2449 /* 2450 * nonop_delay_msecs 2451 */ 2452 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2453 struct t10_alua_tg_pt_gp *tg_pt_gp, 2454 char *page) 2455 { 2456 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2457 2458 } 2459 2460 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2461 struct t10_alua_tg_pt_gp *tg_pt_gp, 2462 const char *page, 2463 size_t count) 2464 { 2465 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2466 } 2467 2468 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2469 2470 /* 2471 * trans_delay_msecs 2472 */ 2473 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2474 struct t10_alua_tg_pt_gp *tg_pt_gp, 2475 char *page) 2476 { 2477 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2478 } 2479 2480 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2481 struct t10_alua_tg_pt_gp *tg_pt_gp, 2482 const char *page, 2483 size_t count) 2484 { 2485 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2486 } 2487 2488 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2489 2490 /* 2491 * implicit_trans_secs 2492 */ 2493 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs( 2494 struct t10_alua_tg_pt_gp *tg_pt_gp, 2495 char *page) 2496 { 2497 return core_alua_show_implicit_trans_secs(tg_pt_gp, page); 2498 } 2499 2500 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs( 2501 struct t10_alua_tg_pt_gp *tg_pt_gp, 2502 const char *page, 2503 size_t count) 2504 { 2505 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count); 2506 } 2507 2508 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR); 2509 2510 /* 2511 * preferred 2512 */ 2513 2514 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2515 struct t10_alua_tg_pt_gp *tg_pt_gp, 2516 char *page) 2517 { 2518 return core_alua_show_preferred_bit(tg_pt_gp, page); 2519 } 2520 2521 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2522 struct t10_alua_tg_pt_gp *tg_pt_gp, 2523 const char *page, 2524 size_t count) 2525 { 2526 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2527 } 2528 2529 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2530 2531 /* 2532 * tg_pt_gp_id 2533 */ 2534 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2535 struct t10_alua_tg_pt_gp *tg_pt_gp, 2536 char *page) 2537 { 2538 if (!tg_pt_gp->tg_pt_gp_valid_id) 2539 return 0; 2540 2541 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2542 } 2543 2544 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2545 struct t10_alua_tg_pt_gp *tg_pt_gp, 2546 const char *page, 2547 size_t count) 2548 { 2549 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2550 unsigned long tg_pt_gp_id; 2551 int ret; 2552 2553 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2554 if (ret < 0) { 2555 pr_err("kstrtoul() returned %d for" 2556 " tg_pt_gp_id\n", ret); 2557 return ret; 2558 } 2559 if (tg_pt_gp_id > 0x0000ffff) { 2560 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2561 " 0x0000ffff\n", tg_pt_gp_id); 2562 return -EINVAL; 2563 } 2564 2565 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2566 if (ret < 0) 2567 return -EINVAL; 2568 2569 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2570 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2571 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2572 tg_pt_gp->tg_pt_gp_id); 2573 2574 return count; 2575 } 2576 2577 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2578 2579 /* 2580 * members 2581 */ 2582 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2583 struct t10_alua_tg_pt_gp *tg_pt_gp, 2584 char *page) 2585 { 2586 struct se_port *port; 2587 struct se_portal_group *tpg; 2588 struct se_lun *lun; 2589 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2590 ssize_t len = 0, cur_len; 2591 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2592 2593 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2594 2595 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2596 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2597 tg_pt_gp_mem_list) { 2598 port = tg_pt_gp_mem->tg_pt; 2599 tpg = port->sep_tpg; 2600 lun = port->sep_lun; 2601 2602 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2603 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2604 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2605 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2606 config_item_name(&lun->lun_group.cg_item)); 2607 cur_len++; /* Extra byte for NULL terminator */ 2608 2609 if ((cur_len + len) > PAGE_SIZE) { 2610 pr_warn("Ran out of lu_gp_show_attr" 2611 "_members buffer\n"); 2612 break; 2613 } 2614 memcpy(page+len, buf, cur_len); 2615 len += cur_len; 2616 } 2617 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2618 2619 return len; 2620 } 2621 2622 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2623 2624 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2625 tg_pt_gp_group); 2626 2627 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2628 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2629 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2630 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2631 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr, 2632 &target_core_alua_tg_pt_gp_alua_support_offline.attr, 2633 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr, 2634 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr, 2635 &target_core_alua_tg_pt_gp_alua_support_standby.attr, 2636 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr, 2637 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr, 2638 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2639 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2640 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2641 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr, 2642 &target_core_alua_tg_pt_gp_preferred.attr, 2643 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2644 &target_core_alua_tg_pt_gp_members.attr, 2645 NULL, 2646 }; 2647 2648 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2649 { 2650 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2651 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2652 2653 core_alua_free_tg_pt_gp(tg_pt_gp); 2654 } 2655 2656 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2657 .release = target_core_alua_tg_pt_gp_release, 2658 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2659 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2660 }; 2661 2662 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2663 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2664 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2665 .ct_owner = THIS_MODULE, 2666 }; 2667 2668 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2669 2670 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2671 2672 static struct config_group *target_core_alua_create_tg_pt_gp( 2673 struct config_group *group, 2674 const char *name) 2675 { 2676 struct t10_alua *alua = container_of(group, struct t10_alua, 2677 alua_tg_pt_gps_group); 2678 struct t10_alua_tg_pt_gp *tg_pt_gp; 2679 struct config_group *alua_tg_pt_gp_cg = NULL; 2680 struct config_item *alua_tg_pt_gp_ci = NULL; 2681 2682 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2683 if (!tg_pt_gp) 2684 return NULL; 2685 2686 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2687 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2688 2689 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2690 &target_core_alua_tg_pt_gp_cit); 2691 2692 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2693 " Group: alua/tg_pt_gps/%s\n", 2694 config_item_name(alua_tg_pt_gp_ci)); 2695 2696 return alua_tg_pt_gp_cg; 2697 } 2698 2699 static void target_core_alua_drop_tg_pt_gp( 2700 struct config_group *group, 2701 struct config_item *item) 2702 { 2703 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2704 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2705 2706 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2707 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2708 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2709 /* 2710 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2711 * -> target_core_alua_tg_pt_gp_release(). 2712 */ 2713 config_item_put(item); 2714 } 2715 2716 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2717 .make_group = &target_core_alua_create_tg_pt_gp, 2718 .drop_item = &target_core_alua_drop_tg_pt_gp, 2719 }; 2720 2721 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2722 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2723 .ct_owner = THIS_MODULE, 2724 }; 2725 2726 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2727 2728 /* Start functions for struct config_item_type target_core_alua_cit */ 2729 2730 /* 2731 * target_core_alua_cit is a ConfigFS group that lives under 2732 * /sys/kernel/config/target/core/alua. There are default groups 2733 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2734 * target_core_alua_cit in target_core_init_configfs() below. 2735 */ 2736 static struct config_item_type target_core_alua_cit = { 2737 .ct_item_ops = NULL, 2738 .ct_attrs = NULL, 2739 .ct_owner = THIS_MODULE, 2740 }; 2741 2742 /* End functions for struct config_item_type target_core_alua_cit */ 2743 2744 /* Start functions for struct config_item_type target_core_stat_cit */ 2745 2746 static struct config_group *target_core_stat_mkdir( 2747 struct config_group *group, 2748 const char *name) 2749 { 2750 return ERR_PTR(-ENOSYS); 2751 } 2752 2753 static void target_core_stat_rmdir( 2754 struct config_group *group, 2755 struct config_item *item) 2756 { 2757 return; 2758 } 2759 2760 static struct configfs_group_operations target_core_stat_group_ops = { 2761 .make_group = &target_core_stat_mkdir, 2762 .drop_item = &target_core_stat_rmdir, 2763 }; 2764 2765 static struct config_item_type target_core_stat_cit = { 2766 .ct_group_ops = &target_core_stat_group_ops, 2767 .ct_owner = THIS_MODULE, 2768 }; 2769 2770 /* End functions for struct config_item_type target_core_stat_cit */ 2771 2772 /* Start functions for struct config_item_type target_core_hba_cit */ 2773 2774 static struct config_group *target_core_make_subdev( 2775 struct config_group *group, 2776 const char *name) 2777 { 2778 struct t10_alua_tg_pt_gp *tg_pt_gp; 2779 struct se_subsystem_api *t; 2780 struct config_item *hba_ci = &group->cg_item; 2781 struct se_hba *hba = item_to_hba(hba_ci); 2782 struct se_device *dev; 2783 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2784 struct config_group *dev_stat_grp = NULL; 2785 int errno = -ENOMEM, ret; 2786 2787 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2788 if (ret) 2789 return ERR_PTR(ret); 2790 /* 2791 * Locate the struct se_subsystem_api from parent's struct se_hba. 2792 */ 2793 t = hba->transport; 2794 2795 dev = target_alloc_device(hba, name); 2796 if (!dev) 2797 goto out_unlock; 2798 2799 dev_cg = &dev->dev_group; 2800 2801 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2802 GFP_KERNEL); 2803 if (!dev_cg->default_groups) 2804 goto out_free_device; 2805 2806 config_group_init_type_name(dev_cg, name, &target_core_dev_cit); 2807 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2808 &target_core_dev_attrib_cit); 2809 config_group_init_type_name(&dev->dev_pr_group, "pr", 2810 &target_core_dev_pr_cit); 2811 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2812 &target_core_dev_wwn_cit); 2813 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2814 "alua", &target_core_alua_tg_pt_gps_cit); 2815 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2816 "statistics", &target_core_stat_cit); 2817 2818 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2819 dev_cg->default_groups[1] = &dev->dev_pr_group; 2820 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2821 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2822 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2823 dev_cg->default_groups[5] = NULL; 2824 /* 2825 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2826 */ 2827 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2828 if (!tg_pt_gp) 2829 goto out_free_dev_cg_default_groups; 2830 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2831 2832 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2833 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2834 GFP_KERNEL); 2835 if (!tg_pt_gp_cg->default_groups) { 2836 pr_err("Unable to allocate tg_pt_gp_cg->" 2837 "default_groups\n"); 2838 goto out_free_tg_pt_gp; 2839 } 2840 2841 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2842 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2843 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2844 tg_pt_gp_cg->default_groups[1] = NULL; 2845 /* 2846 * Add core/$HBA/$DEV/statistics/ default groups 2847 */ 2848 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2849 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2850 GFP_KERNEL); 2851 if (!dev_stat_grp->default_groups) { 2852 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2853 goto out_free_tg_pt_gp_cg_default_groups; 2854 } 2855 target_stat_setup_dev_default_groups(dev); 2856 2857 mutex_unlock(&hba->hba_access_mutex); 2858 return dev_cg; 2859 2860 out_free_tg_pt_gp_cg_default_groups: 2861 kfree(tg_pt_gp_cg->default_groups); 2862 out_free_tg_pt_gp: 2863 core_alua_free_tg_pt_gp(tg_pt_gp); 2864 out_free_dev_cg_default_groups: 2865 kfree(dev_cg->default_groups); 2866 out_free_device: 2867 target_free_device(dev); 2868 out_unlock: 2869 mutex_unlock(&hba->hba_access_mutex); 2870 return ERR_PTR(errno); 2871 } 2872 2873 static void target_core_drop_subdev( 2874 struct config_group *group, 2875 struct config_item *item) 2876 { 2877 struct config_group *dev_cg = to_config_group(item); 2878 struct se_device *dev = 2879 container_of(dev_cg, struct se_device, dev_group); 2880 struct se_hba *hba; 2881 struct config_item *df_item; 2882 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2883 int i; 2884 2885 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2886 2887 mutex_lock(&hba->hba_access_mutex); 2888 2889 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2890 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2891 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2892 dev_stat_grp->default_groups[i] = NULL; 2893 config_item_put(df_item); 2894 } 2895 kfree(dev_stat_grp->default_groups); 2896 2897 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2898 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2899 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2900 tg_pt_gp_cg->default_groups[i] = NULL; 2901 config_item_put(df_item); 2902 } 2903 kfree(tg_pt_gp_cg->default_groups); 2904 /* 2905 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2906 * directly from target_core_alua_tg_pt_gp_release(). 2907 */ 2908 dev->t10_alua.default_tg_pt_gp = NULL; 2909 2910 for (i = 0; dev_cg->default_groups[i]; i++) { 2911 df_item = &dev_cg->default_groups[i]->cg_item; 2912 dev_cg->default_groups[i] = NULL; 2913 config_item_put(df_item); 2914 } 2915 /* 2916 * se_dev is released from target_core_dev_item_ops->release() 2917 */ 2918 config_item_put(item); 2919 mutex_unlock(&hba->hba_access_mutex); 2920 } 2921 2922 static struct configfs_group_operations target_core_hba_group_ops = { 2923 .make_group = target_core_make_subdev, 2924 .drop_item = target_core_drop_subdev, 2925 }; 2926 2927 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2928 #define SE_HBA_ATTR(_name, _mode) \ 2929 static struct target_core_hba_attribute \ 2930 target_core_hba_##_name = \ 2931 __CONFIGFS_EATTR(_name, _mode, \ 2932 target_core_hba_show_attr_##_name, \ 2933 target_core_hba_store_attr_##_name); 2934 2935 #define SE_HBA_ATTR_RO(_name) \ 2936 static struct target_core_hba_attribute \ 2937 target_core_hba_##_name = \ 2938 __CONFIGFS_EATTR_RO(_name, \ 2939 target_core_hba_show_attr_##_name); 2940 2941 static ssize_t target_core_hba_show_attr_hba_info( 2942 struct se_hba *hba, 2943 char *page) 2944 { 2945 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2946 hba->hba_id, hba->transport->name, 2947 TARGET_CORE_CONFIGFS_VERSION); 2948 } 2949 2950 SE_HBA_ATTR_RO(hba_info); 2951 2952 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2953 char *page) 2954 { 2955 int hba_mode = 0; 2956 2957 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2958 hba_mode = 1; 2959 2960 return sprintf(page, "%d\n", hba_mode); 2961 } 2962 2963 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2964 const char *page, size_t count) 2965 { 2966 struct se_subsystem_api *transport = hba->transport; 2967 unsigned long mode_flag; 2968 int ret; 2969 2970 if (transport->pmode_enable_hba == NULL) 2971 return -EINVAL; 2972 2973 ret = kstrtoul(page, 0, &mode_flag); 2974 if (ret < 0) { 2975 pr_err("Unable to extract hba mode flag: %d\n", ret); 2976 return ret; 2977 } 2978 2979 if (hba->dev_count) { 2980 pr_err("Unable to set hba_mode with active devices\n"); 2981 return -EINVAL; 2982 } 2983 2984 ret = transport->pmode_enable_hba(hba, mode_flag); 2985 if (ret < 0) 2986 return -EINVAL; 2987 if (ret > 0) 2988 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2989 else if (ret == 0) 2990 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2991 2992 return count; 2993 } 2994 2995 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2996 2997 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2998 2999 static void target_core_hba_release(struct config_item *item) 3000 { 3001 struct se_hba *hba = container_of(to_config_group(item), 3002 struct se_hba, hba_group); 3003 core_delete_hba(hba); 3004 } 3005 3006 static struct configfs_attribute *target_core_hba_attrs[] = { 3007 &target_core_hba_hba_info.attr, 3008 &target_core_hba_hba_mode.attr, 3009 NULL, 3010 }; 3011 3012 static struct configfs_item_operations target_core_hba_item_ops = { 3013 .release = target_core_hba_release, 3014 .show_attribute = target_core_hba_attr_show, 3015 .store_attribute = target_core_hba_attr_store, 3016 }; 3017 3018 static struct config_item_type target_core_hba_cit = { 3019 .ct_item_ops = &target_core_hba_item_ops, 3020 .ct_group_ops = &target_core_hba_group_ops, 3021 .ct_attrs = target_core_hba_attrs, 3022 .ct_owner = THIS_MODULE, 3023 }; 3024 3025 static struct config_group *target_core_call_addhbatotarget( 3026 struct config_group *group, 3027 const char *name) 3028 { 3029 char *se_plugin_str, *str, *str2; 3030 struct se_hba *hba; 3031 char buf[TARGET_CORE_NAME_MAX_LEN]; 3032 unsigned long plugin_dep_id = 0; 3033 int ret; 3034 3035 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3036 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3037 pr_err("Passed *name strlen(): %d exceeds" 3038 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3039 TARGET_CORE_NAME_MAX_LEN); 3040 return ERR_PTR(-ENAMETOOLONG); 3041 } 3042 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3043 3044 str = strstr(buf, "_"); 3045 if (!str) { 3046 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3047 return ERR_PTR(-EINVAL); 3048 } 3049 se_plugin_str = buf; 3050 /* 3051 * Special case for subsystem plugins that have "_" in their names. 3052 * Namely rd_direct and rd_mcp.. 3053 */ 3054 str2 = strstr(str+1, "_"); 3055 if (str2) { 3056 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3057 str2++; /* Skip to start of plugin dependent ID */ 3058 str = str2; 3059 } else { 3060 *str = '\0'; /* Terminate for *se_plugin_str */ 3061 str++; /* Skip to start of plugin dependent ID */ 3062 } 3063 3064 ret = kstrtoul(str, 0, &plugin_dep_id); 3065 if (ret < 0) { 3066 pr_err("kstrtoul() returned %d for" 3067 " plugin_dep_id\n", ret); 3068 return ERR_PTR(ret); 3069 } 3070 /* 3071 * Load up TCM subsystem plugins if they have not already been loaded. 3072 */ 3073 transport_subsystem_check_init(); 3074 3075 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3076 if (IS_ERR(hba)) 3077 return ERR_CAST(hba); 3078 3079 config_group_init_type_name(&hba->hba_group, name, 3080 &target_core_hba_cit); 3081 3082 return &hba->hba_group; 3083 } 3084 3085 static void target_core_call_delhbafromtarget( 3086 struct config_group *group, 3087 struct config_item *item) 3088 { 3089 /* 3090 * core_delete_hba() is called from target_core_hba_item_ops->release() 3091 * -> target_core_hba_release() 3092 */ 3093 config_item_put(item); 3094 } 3095 3096 static struct configfs_group_operations target_core_group_ops = { 3097 .make_group = target_core_call_addhbatotarget, 3098 .drop_item = target_core_call_delhbafromtarget, 3099 }; 3100 3101 static struct config_item_type target_core_cit = { 3102 .ct_item_ops = NULL, 3103 .ct_group_ops = &target_core_group_ops, 3104 .ct_attrs = NULL, 3105 .ct_owner = THIS_MODULE, 3106 }; 3107 3108 /* Stop functions for struct config_item_type target_core_hba_cit */ 3109 3110 static int __init target_core_init_configfs(void) 3111 { 3112 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3113 struct config_group *lu_gp_cg = NULL; 3114 struct configfs_subsystem *subsys; 3115 struct t10_alua_lu_gp *lu_gp; 3116 int ret; 3117 3118 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3119 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3120 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3121 3122 subsys = target_core_subsystem[0]; 3123 config_group_init(&subsys->su_group); 3124 mutex_init(&subsys->su_mutex); 3125 3126 ret = init_se_kmem_caches(); 3127 if (ret < 0) 3128 return ret; 3129 /* 3130 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3131 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3132 */ 3133 target_cg = &subsys->su_group; 3134 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3135 GFP_KERNEL); 3136 if (!target_cg->default_groups) { 3137 pr_err("Unable to allocate target_cg->default_groups\n"); 3138 ret = -ENOMEM; 3139 goto out_global; 3140 } 3141 3142 config_group_init_type_name(&target_core_hbagroup, 3143 "core", &target_core_cit); 3144 target_cg->default_groups[0] = &target_core_hbagroup; 3145 target_cg->default_groups[1] = NULL; 3146 /* 3147 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3148 */ 3149 hba_cg = &target_core_hbagroup; 3150 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3151 GFP_KERNEL); 3152 if (!hba_cg->default_groups) { 3153 pr_err("Unable to allocate hba_cg->default_groups\n"); 3154 ret = -ENOMEM; 3155 goto out_global; 3156 } 3157 config_group_init_type_name(&alua_group, 3158 "alua", &target_core_alua_cit); 3159 hba_cg->default_groups[0] = &alua_group; 3160 hba_cg->default_groups[1] = NULL; 3161 /* 3162 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3163 * groups under /sys/kernel/config/target/core/alua/ 3164 */ 3165 alua_cg = &alua_group; 3166 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3167 GFP_KERNEL); 3168 if (!alua_cg->default_groups) { 3169 pr_err("Unable to allocate alua_cg->default_groups\n"); 3170 ret = -ENOMEM; 3171 goto out_global; 3172 } 3173 3174 config_group_init_type_name(&alua_lu_gps_group, 3175 "lu_gps", &target_core_alua_lu_gps_cit); 3176 alua_cg->default_groups[0] = &alua_lu_gps_group; 3177 alua_cg->default_groups[1] = NULL; 3178 /* 3179 * Add core/alua/lu_gps/default_lu_gp 3180 */ 3181 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3182 if (IS_ERR(lu_gp)) { 3183 ret = -ENOMEM; 3184 goto out_global; 3185 } 3186 3187 lu_gp_cg = &alua_lu_gps_group; 3188 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3189 GFP_KERNEL); 3190 if (!lu_gp_cg->default_groups) { 3191 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3192 ret = -ENOMEM; 3193 goto out_global; 3194 } 3195 3196 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3197 &target_core_alua_lu_gp_cit); 3198 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3199 lu_gp_cg->default_groups[1] = NULL; 3200 default_lu_gp = lu_gp; 3201 /* 3202 * Register the target_core_mod subsystem with configfs. 3203 */ 3204 ret = configfs_register_subsystem(subsys); 3205 if (ret < 0) { 3206 pr_err("Error %d while registering subsystem %s\n", 3207 ret, subsys->su_group.cg_item.ci_namebuf); 3208 goto out_global; 3209 } 3210 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3211 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3212 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3213 /* 3214 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3215 */ 3216 ret = rd_module_init(); 3217 if (ret < 0) 3218 goto out; 3219 3220 ret = core_dev_setup_virtual_lun0(); 3221 if (ret < 0) 3222 goto out; 3223 3224 ret = target_xcopy_setup_pt(); 3225 if (ret < 0) 3226 goto out; 3227 3228 return 0; 3229 3230 out: 3231 configfs_unregister_subsystem(subsys); 3232 core_dev_release_virtual_lun0(); 3233 rd_module_exit(); 3234 out_global: 3235 if (default_lu_gp) { 3236 core_alua_free_lu_gp(default_lu_gp); 3237 default_lu_gp = NULL; 3238 } 3239 if (lu_gp_cg) 3240 kfree(lu_gp_cg->default_groups); 3241 if (alua_cg) 3242 kfree(alua_cg->default_groups); 3243 if (hba_cg) 3244 kfree(hba_cg->default_groups); 3245 kfree(target_cg->default_groups); 3246 release_se_kmem_caches(); 3247 return ret; 3248 } 3249 3250 static void __exit target_core_exit_configfs(void) 3251 { 3252 struct configfs_subsystem *subsys; 3253 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3254 struct config_item *item; 3255 int i; 3256 3257 subsys = target_core_subsystem[0]; 3258 3259 lu_gp_cg = &alua_lu_gps_group; 3260 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3261 item = &lu_gp_cg->default_groups[i]->cg_item; 3262 lu_gp_cg->default_groups[i] = NULL; 3263 config_item_put(item); 3264 } 3265 kfree(lu_gp_cg->default_groups); 3266 lu_gp_cg->default_groups = NULL; 3267 3268 alua_cg = &alua_group; 3269 for (i = 0; alua_cg->default_groups[i]; i++) { 3270 item = &alua_cg->default_groups[i]->cg_item; 3271 alua_cg->default_groups[i] = NULL; 3272 config_item_put(item); 3273 } 3274 kfree(alua_cg->default_groups); 3275 alua_cg->default_groups = NULL; 3276 3277 hba_cg = &target_core_hbagroup; 3278 for (i = 0; hba_cg->default_groups[i]; i++) { 3279 item = &hba_cg->default_groups[i]->cg_item; 3280 hba_cg->default_groups[i] = NULL; 3281 config_item_put(item); 3282 } 3283 kfree(hba_cg->default_groups); 3284 hba_cg->default_groups = NULL; 3285 /* 3286 * We expect subsys->su_group.default_groups to be released 3287 * by configfs subsystem provider logic.. 3288 */ 3289 configfs_unregister_subsystem(subsys); 3290 kfree(subsys->su_group.default_groups); 3291 3292 core_alua_free_lu_gp(default_lu_gp); 3293 default_lu_gp = NULL; 3294 3295 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3296 " Infrastructure\n"); 3297 3298 core_dev_release_virtual_lun0(); 3299 rd_module_exit(); 3300 target_xcopy_release_pt(); 3301 release_se_kmem_caches(); 3302 } 3303 3304 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3305 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3306 MODULE_LICENSE("GPL"); 3307 3308 module_init(target_core_init_configfs); 3309 module_exit(target_core_exit_configfs); 3310