1 /******************************************************************************* 2 * Filename: target_core_fabric_configfs.c 3 * 4 * This file contains generic fabric module configfs infrastructure for 5 * TCM v4.x code 6 * 7 * (c) Copyright 2010-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@linux-iscsi.org> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 ****************************************************************************/ 21 22 #include <linux/module.h> 23 #include <linux/moduleparam.h> 24 #include <linux/utsname.h> 25 #include <linux/init.h> 26 #include <linux/fs.h> 27 #include <linux/namei.h> 28 #include <linux/slab.h> 29 #include <linux/types.h> 30 #include <linux/delay.h> 31 #include <linux/unistd.h> 32 #include <linux/string.h> 33 #include <linux/syscalls.h> 34 #include <linux/configfs.h> 35 36 #include <target/target_core_base.h> 37 #include <target/target_core_fabric.h> 38 39 #include "target_core_internal.h" 40 #include "target_core_alua.h" 41 #include "target_core_pr.h" 42 43 #define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 44 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \ 45 { \ 46 struct config_item_type *cit = &tf->tf_##_name##_cit; \ 47 \ 48 cit->ct_item_ops = _item_ops; \ 49 cit->ct_group_ops = _group_ops; \ 50 cit->ct_attrs = _attrs; \ 51 cit->ct_owner = tf->tf_ops->module; \ 52 pr_debug("Setup generic %s\n", __stringify(_name)); \ 53 } 54 55 #define TF_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 56 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \ 57 { \ 58 struct config_item_type *cit = &tf->tf_##_name##_cit; \ 59 struct configfs_attribute **attrs = tf->tf_ops->tfc_##_name##_attrs; \ 60 \ 61 cit->ct_item_ops = _item_ops; \ 62 cit->ct_group_ops = _group_ops; \ 63 cit->ct_attrs = attrs; \ 64 cit->ct_owner = tf->tf_ops->module; \ 65 pr_debug("Setup generic %s\n", __stringify(_name)); \ 66 } 67 68 /* Start of tfc_tpg_mappedlun_cit */ 69 70 static int target_fabric_mappedlun_link( 71 struct config_item *lun_acl_ci, 72 struct config_item *lun_ci) 73 { 74 struct se_dev_entry *deve; 75 struct se_lun *lun = container_of(to_config_group(lun_ci), 76 struct se_lun, lun_group); 77 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci), 78 struct se_lun_acl, se_lun_group); 79 struct se_portal_group *se_tpg; 80 struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s; 81 bool lun_access_ro; 82 83 if (lun->lun_link_magic != SE_LUN_LINK_MAGIC) { 84 pr_err("Bad lun->lun_link_magic, not a valid lun_ci pointer:" 85 " %p to struct lun: %p\n", lun_ci, lun); 86 return -EFAULT; 87 } 88 /* 89 * Ensure that the source port exists 90 */ 91 if (!lun->lun_se_dev) { 92 pr_err("Source se_lun->lun_se_dev does not exist\n"); 93 return -EINVAL; 94 } 95 if (lun->lun_shutdown) { 96 pr_err("Unable to create mappedlun symlink because" 97 " lun->lun_shutdown=true\n"); 98 return -EINVAL; 99 } 100 se_tpg = lun->lun_tpg; 101 102 nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item; 103 tpg_ci = &nacl_ci->ci_group->cg_item; 104 wwn_ci = &tpg_ci->ci_group->cg_item; 105 tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item; 106 wwn_ci_s = &tpg_ci_s->ci_group->cg_item; 107 /* 108 * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT 109 */ 110 if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) { 111 pr_err("Illegal Initiator ACL SymLink outside of %s\n", 112 config_item_name(wwn_ci)); 113 return -EINVAL; 114 } 115 if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) { 116 pr_err("Illegal Initiator ACL Symlink outside of %s" 117 " TPGT: %s\n", config_item_name(wwn_ci), 118 config_item_name(tpg_ci)); 119 return -EINVAL; 120 } 121 /* 122 * If this struct se_node_acl was dynamically generated with 123 * tpg_1/attrib/generate_node_acls=1, use the existing 124 * deve->lun_access_ro value, which will be true when 125 * tpg_1/attrib/demo_mode_write_protect=1 126 */ 127 rcu_read_lock(); 128 deve = target_nacl_find_deve(lacl->se_lun_nacl, lacl->mapped_lun); 129 if (deve) 130 lun_access_ro = deve->lun_access_ro; 131 else 132 lun_access_ro = 133 (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect( 134 se_tpg)) ? true : false; 135 rcu_read_unlock(); 136 /* 137 * Determine the actual mapped LUN value user wants.. 138 * 139 * This value is what the SCSI Initiator actually sees the 140 * $FABRIC/$WWPN/$TPGT/lun/lun_* as on their SCSI Initiator Ports. 141 */ 142 return core_dev_add_initiator_node_lun_acl(se_tpg, lacl, lun, lun_access_ro); 143 } 144 145 static void target_fabric_mappedlun_unlink( 146 struct config_item *lun_acl_ci, 147 struct config_item *lun_ci) 148 { 149 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci), 150 struct se_lun_acl, se_lun_group); 151 struct se_lun *lun = container_of(to_config_group(lun_ci), 152 struct se_lun, lun_group); 153 154 core_dev_del_initiator_node_lun_acl(lun, lacl); 155 } 156 157 static struct se_lun_acl *item_to_lun_acl(struct config_item *item) 158 { 159 return container_of(to_config_group(item), struct se_lun_acl, 160 se_lun_group); 161 } 162 163 static ssize_t target_fabric_mappedlun_write_protect_show( 164 struct config_item *item, char *page) 165 { 166 struct se_lun_acl *lacl = item_to_lun_acl(item); 167 struct se_node_acl *se_nacl = lacl->se_lun_nacl; 168 struct se_dev_entry *deve; 169 ssize_t len = 0; 170 171 rcu_read_lock(); 172 deve = target_nacl_find_deve(se_nacl, lacl->mapped_lun); 173 if (deve) { 174 len = sprintf(page, "%d\n", deve->lun_access_ro); 175 } 176 rcu_read_unlock(); 177 178 return len; 179 } 180 181 static ssize_t target_fabric_mappedlun_write_protect_store( 182 struct config_item *item, const char *page, size_t count) 183 { 184 struct se_lun_acl *lacl = item_to_lun_acl(item); 185 struct se_node_acl *se_nacl = lacl->se_lun_nacl; 186 struct se_portal_group *se_tpg = se_nacl->se_tpg; 187 unsigned long wp; 188 int ret; 189 190 ret = kstrtoul(page, 0, &wp); 191 if (ret) 192 return ret; 193 194 if ((wp != 1) && (wp != 0)) 195 return -EINVAL; 196 197 /* wp=1 means lun_access_ro=true */ 198 core_update_device_list_access(lacl->mapped_lun, wp, lacl->se_lun_nacl); 199 200 pr_debug("%s_ConfigFS: Changed Initiator ACL: %s" 201 " Mapped LUN: %llu Write Protect bit to %s\n", 202 se_tpg->se_tpg_tfo->get_fabric_name(), 203 se_nacl->initiatorname, lacl->mapped_lun, (wp) ? "ON" : "OFF"); 204 205 return count; 206 207 } 208 209 CONFIGFS_ATTR(target_fabric_mappedlun_, write_protect); 210 211 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = { 212 &target_fabric_mappedlun_attr_write_protect, 213 NULL, 214 }; 215 216 static void target_fabric_mappedlun_release(struct config_item *item) 217 { 218 struct se_lun_acl *lacl = container_of(to_config_group(item), 219 struct se_lun_acl, se_lun_group); 220 struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg; 221 222 core_dev_free_initiator_node_lun_acl(se_tpg, lacl); 223 } 224 225 static struct configfs_item_operations target_fabric_mappedlun_item_ops = { 226 .release = target_fabric_mappedlun_release, 227 .allow_link = target_fabric_mappedlun_link, 228 .drop_link = target_fabric_mappedlun_unlink, 229 }; 230 231 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL, 232 target_fabric_mappedlun_attrs); 233 234 /* End of tfc_tpg_mappedlun_cit */ 235 236 /* Start of tfc_tpg_mappedlun_port_cit */ 237 238 static struct config_group *target_core_mappedlun_stat_mkdir( 239 struct config_group *group, 240 const char *name) 241 { 242 return ERR_PTR(-ENOSYS); 243 } 244 245 static void target_core_mappedlun_stat_rmdir( 246 struct config_group *group, 247 struct config_item *item) 248 { 249 return; 250 } 251 252 static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = { 253 .make_group = target_core_mappedlun_stat_mkdir, 254 .drop_item = target_core_mappedlun_stat_rmdir, 255 }; 256 257 TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops, 258 NULL); 259 260 /* End of tfc_tpg_mappedlun_port_cit */ 261 262 TF_CIT_SETUP_DRV(tpg_nacl_attrib, NULL, NULL); 263 TF_CIT_SETUP_DRV(tpg_nacl_auth, NULL, NULL); 264 TF_CIT_SETUP_DRV(tpg_nacl_param, NULL, NULL); 265 266 /* Start of tfc_tpg_nacl_base_cit */ 267 268 static struct config_group *target_fabric_make_mappedlun( 269 struct config_group *group, 270 const char *name) 271 { 272 struct se_node_acl *se_nacl = container_of(group, 273 struct se_node_acl, acl_group); 274 struct se_portal_group *se_tpg = se_nacl->se_tpg; 275 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 276 struct se_lun_acl *lacl = NULL; 277 char *buf; 278 unsigned long long mapped_lun; 279 int ret = 0; 280 281 buf = kzalloc(strlen(name) + 1, GFP_KERNEL); 282 if (!buf) { 283 pr_err("Unable to allocate memory for name buf\n"); 284 return ERR_PTR(-ENOMEM); 285 } 286 snprintf(buf, strlen(name) + 1, "%s", name); 287 /* 288 * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID. 289 */ 290 if (strstr(buf, "lun_") != buf) { 291 pr_err("Unable to locate \"lun_\" from buf: %s" 292 " name: %s\n", buf, name); 293 ret = -EINVAL; 294 goto out; 295 } 296 /* 297 * Determine the Mapped LUN value. This is what the SCSI Initiator 298 * Port will actually see. 299 */ 300 ret = kstrtoull(buf + 4, 0, &mapped_lun); 301 if (ret) 302 goto out; 303 304 lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl, 305 mapped_lun, &ret); 306 if (!lacl) { 307 ret = -EINVAL; 308 goto out; 309 } 310 311 config_group_init_type_name(&lacl->se_lun_group, name, 312 &tf->tf_tpg_mappedlun_cit); 313 314 config_group_init_type_name(&lacl->ml_stat_grps.stat_group, 315 "statistics", &tf->tf_tpg_mappedlun_stat_cit); 316 configfs_add_default_group(&lacl->ml_stat_grps.stat_group, 317 &lacl->se_lun_group); 318 319 target_stat_setup_mappedlun_default_groups(lacl); 320 321 kfree(buf); 322 return &lacl->se_lun_group; 323 out: 324 kfree(lacl); 325 kfree(buf); 326 return ERR_PTR(ret); 327 } 328 329 static void target_fabric_drop_mappedlun( 330 struct config_group *group, 331 struct config_item *item) 332 { 333 struct se_lun_acl *lacl = container_of(to_config_group(item), 334 struct se_lun_acl, se_lun_group); 335 336 configfs_remove_default_groups(&lacl->ml_stat_grps.stat_group); 337 configfs_remove_default_groups(&lacl->se_lun_group); 338 339 config_item_put(item); 340 } 341 342 static void target_fabric_nacl_base_release(struct config_item *item) 343 { 344 struct se_node_acl *se_nacl = container_of(to_config_group(item), 345 struct se_node_acl, acl_group); 346 347 configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group); 348 core_tpg_del_initiator_node_acl(se_nacl); 349 } 350 351 static struct configfs_item_operations target_fabric_nacl_base_item_ops = { 352 .release = target_fabric_nacl_base_release, 353 }; 354 355 static struct configfs_group_operations target_fabric_nacl_base_group_ops = { 356 .make_group = target_fabric_make_mappedlun, 357 .drop_item = target_fabric_drop_mappedlun, 358 }; 359 360 TF_CIT_SETUP_DRV(tpg_nacl_base, &target_fabric_nacl_base_item_ops, 361 &target_fabric_nacl_base_group_ops); 362 363 /* End of tfc_tpg_nacl_base_cit */ 364 365 /* Start of tfc_node_fabric_stats_cit */ 366 /* 367 * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group 368 * to allow fabrics access to ->acl_fabric_stat_group->default_groups[] 369 */ 370 TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL); 371 372 /* End of tfc_wwn_fabric_stats_cit */ 373 374 /* Start of tfc_tpg_nacl_cit */ 375 376 static struct config_group *target_fabric_make_nodeacl( 377 struct config_group *group, 378 const char *name) 379 { 380 struct se_portal_group *se_tpg = container_of(group, 381 struct se_portal_group, tpg_acl_group); 382 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 383 struct se_node_acl *se_nacl; 384 385 se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name); 386 if (IS_ERR(se_nacl)) 387 return ERR_CAST(se_nacl); 388 389 config_group_init_type_name(&se_nacl->acl_group, name, 390 &tf->tf_tpg_nacl_base_cit); 391 392 config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib", 393 &tf->tf_tpg_nacl_attrib_cit); 394 configfs_add_default_group(&se_nacl->acl_attrib_group, 395 &se_nacl->acl_group); 396 397 config_group_init_type_name(&se_nacl->acl_auth_group, "auth", 398 &tf->tf_tpg_nacl_auth_cit); 399 configfs_add_default_group(&se_nacl->acl_auth_group, 400 &se_nacl->acl_group); 401 402 config_group_init_type_name(&se_nacl->acl_param_group, "param", 403 &tf->tf_tpg_nacl_param_cit); 404 configfs_add_default_group(&se_nacl->acl_param_group, 405 &se_nacl->acl_group); 406 407 config_group_init_type_name(&se_nacl->acl_fabric_stat_group, 408 "fabric_statistics", &tf->tf_tpg_nacl_stat_cit); 409 configfs_add_default_group(&se_nacl->acl_fabric_stat_group, 410 &se_nacl->acl_group); 411 412 if (tf->tf_ops->fabric_init_nodeacl) { 413 int ret = tf->tf_ops->fabric_init_nodeacl(se_nacl, name); 414 if (ret) { 415 configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group); 416 core_tpg_del_initiator_node_acl(se_nacl); 417 return ERR_PTR(ret); 418 } 419 } 420 421 return &se_nacl->acl_group; 422 } 423 424 static void target_fabric_drop_nodeacl( 425 struct config_group *group, 426 struct config_item *item) 427 { 428 struct se_node_acl *se_nacl = container_of(to_config_group(item), 429 struct se_node_acl, acl_group); 430 431 configfs_remove_default_groups(&se_nacl->acl_group); 432 433 /* 434 * struct se_node_acl free is done in target_fabric_nacl_base_release() 435 */ 436 config_item_put(item); 437 } 438 439 static struct configfs_group_operations target_fabric_nacl_group_ops = { 440 .make_group = target_fabric_make_nodeacl, 441 .drop_item = target_fabric_drop_nodeacl, 442 }; 443 444 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL); 445 446 /* End of tfc_tpg_nacl_cit */ 447 448 /* Start of tfc_tpg_np_base_cit */ 449 450 static void target_fabric_np_base_release(struct config_item *item) 451 { 452 struct se_tpg_np *se_tpg_np = container_of(to_config_group(item), 453 struct se_tpg_np, tpg_np_group); 454 struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent; 455 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 456 457 tf->tf_ops->fabric_drop_np(se_tpg_np); 458 } 459 460 static struct configfs_item_operations target_fabric_np_base_item_ops = { 461 .release = target_fabric_np_base_release, 462 }; 463 464 TF_CIT_SETUP_DRV(tpg_np_base, &target_fabric_np_base_item_ops, NULL); 465 466 /* End of tfc_tpg_np_base_cit */ 467 468 /* Start of tfc_tpg_np_cit */ 469 470 static struct config_group *target_fabric_make_np( 471 struct config_group *group, 472 const char *name) 473 { 474 struct se_portal_group *se_tpg = container_of(group, 475 struct se_portal_group, tpg_np_group); 476 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 477 struct se_tpg_np *se_tpg_np; 478 479 if (!tf->tf_ops->fabric_make_np) { 480 pr_err("tf->tf_ops.fabric_make_np is NULL\n"); 481 return ERR_PTR(-ENOSYS); 482 } 483 484 se_tpg_np = tf->tf_ops->fabric_make_np(se_tpg, group, name); 485 if (!se_tpg_np || IS_ERR(se_tpg_np)) 486 return ERR_PTR(-EINVAL); 487 488 se_tpg_np->tpg_np_parent = se_tpg; 489 config_group_init_type_name(&se_tpg_np->tpg_np_group, name, 490 &tf->tf_tpg_np_base_cit); 491 492 return &se_tpg_np->tpg_np_group; 493 } 494 495 static void target_fabric_drop_np( 496 struct config_group *group, 497 struct config_item *item) 498 { 499 /* 500 * struct se_tpg_np is released via target_fabric_np_base_release() 501 */ 502 config_item_put(item); 503 } 504 505 static struct configfs_group_operations target_fabric_np_group_ops = { 506 .make_group = &target_fabric_make_np, 507 .drop_item = &target_fabric_drop_np, 508 }; 509 510 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL); 511 512 /* End of tfc_tpg_np_cit */ 513 514 /* Start of tfc_tpg_port_cit */ 515 516 static struct se_lun *item_to_lun(struct config_item *item) 517 { 518 return container_of(to_config_group(item), struct se_lun, 519 lun_group); 520 } 521 522 static ssize_t target_fabric_port_alua_tg_pt_gp_show(struct config_item *item, 523 char *page) 524 { 525 struct se_lun *lun = item_to_lun(item); 526 527 if (!lun || !lun->lun_se_dev) 528 return -ENODEV; 529 530 return core_alua_show_tg_pt_gp_info(lun, page); 531 } 532 533 static ssize_t target_fabric_port_alua_tg_pt_gp_store(struct config_item *item, 534 const char *page, size_t count) 535 { 536 struct se_lun *lun = item_to_lun(item); 537 538 if (!lun || !lun->lun_se_dev) 539 return -ENODEV; 540 541 return core_alua_store_tg_pt_gp_info(lun, page, count); 542 } 543 544 static ssize_t target_fabric_port_alua_tg_pt_offline_show( 545 struct config_item *item, char *page) 546 { 547 struct se_lun *lun = item_to_lun(item); 548 549 if (!lun || !lun->lun_se_dev) 550 return -ENODEV; 551 552 return core_alua_show_offline_bit(lun, page); 553 } 554 555 static ssize_t target_fabric_port_alua_tg_pt_offline_store( 556 struct config_item *item, const char *page, size_t count) 557 { 558 struct se_lun *lun = item_to_lun(item); 559 560 if (!lun || !lun->lun_se_dev) 561 return -ENODEV; 562 563 return core_alua_store_offline_bit(lun, page, count); 564 } 565 566 static ssize_t target_fabric_port_alua_tg_pt_status_show( 567 struct config_item *item, char *page) 568 { 569 struct se_lun *lun = item_to_lun(item); 570 571 if (!lun || !lun->lun_se_dev) 572 return -ENODEV; 573 574 return core_alua_show_secondary_status(lun, page); 575 } 576 577 static ssize_t target_fabric_port_alua_tg_pt_status_store( 578 struct config_item *item, const char *page, size_t count) 579 { 580 struct se_lun *lun = item_to_lun(item); 581 582 if (!lun || !lun->lun_se_dev) 583 return -ENODEV; 584 585 return core_alua_store_secondary_status(lun, page, count); 586 } 587 588 static ssize_t target_fabric_port_alua_tg_pt_write_md_show( 589 struct config_item *item, char *page) 590 { 591 struct se_lun *lun = item_to_lun(item); 592 593 if (!lun || !lun->lun_se_dev) 594 return -ENODEV; 595 596 return core_alua_show_secondary_write_metadata(lun, page); 597 } 598 599 static ssize_t target_fabric_port_alua_tg_pt_write_md_store( 600 struct config_item *item, const char *page, size_t count) 601 { 602 struct se_lun *lun = item_to_lun(item); 603 604 if (!lun || !lun->lun_se_dev) 605 return -ENODEV; 606 607 return core_alua_store_secondary_write_metadata(lun, page, count); 608 } 609 610 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_gp); 611 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_offline); 612 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_status); 613 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_write_md); 614 615 static struct configfs_attribute *target_fabric_port_attrs[] = { 616 &target_fabric_port_attr_alua_tg_pt_gp, 617 &target_fabric_port_attr_alua_tg_pt_offline, 618 &target_fabric_port_attr_alua_tg_pt_status, 619 &target_fabric_port_attr_alua_tg_pt_write_md, 620 NULL, 621 }; 622 623 extern struct configfs_item_operations target_core_dev_item_ops; 624 625 static int target_fabric_port_link( 626 struct config_item *lun_ci, 627 struct config_item *se_dev_ci) 628 { 629 struct config_item *tpg_ci; 630 struct se_lun *lun = container_of(to_config_group(lun_ci), 631 struct se_lun, lun_group); 632 struct se_portal_group *se_tpg; 633 struct se_device *dev; 634 struct target_fabric_configfs *tf; 635 int ret; 636 637 if (!se_dev_ci->ci_type || 638 se_dev_ci->ci_type->ct_item_ops != &target_core_dev_item_ops) { 639 pr_err("Bad se_dev_ci, not a valid se_dev_ci pointer: %p\n", se_dev_ci); 640 return -EFAULT; 641 } 642 dev = container_of(to_config_group(se_dev_ci), struct se_device, dev_group); 643 644 if (!(dev->dev_flags & DF_CONFIGURED)) { 645 pr_err("se_device not configured yet, cannot port link\n"); 646 return -ENODEV; 647 } 648 649 tpg_ci = &lun_ci->ci_parent->ci_group->cg_item; 650 se_tpg = container_of(to_config_group(tpg_ci), 651 struct se_portal_group, tpg_group); 652 tf = se_tpg->se_tpg_wwn->wwn_tf; 653 654 if (lun->lun_se_dev != NULL) { 655 pr_err("Port Symlink already exists\n"); 656 return -EEXIST; 657 } 658 659 ret = core_dev_add_lun(se_tpg, dev, lun); 660 if (ret) { 661 pr_err("core_dev_add_lun() failed: %d\n", ret); 662 goto out; 663 } 664 665 if (tf->tf_ops->fabric_post_link) { 666 /* 667 * Call the optional fabric_post_link() to allow a 668 * fabric module to setup any additional state once 669 * core_dev_add_lun() has been called.. 670 */ 671 tf->tf_ops->fabric_post_link(se_tpg, lun); 672 } 673 674 return 0; 675 out: 676 return ret; 677 } 678 679 static void target_fabric_port_unlink( 680 struct config_item *lun_ci, 681 struct config_item *se_dev_ci) 682 { 683 struct se_lun *lun = container_of(to_config_group(lun_ci), 684 struct se_lun, lun_group); 685 struct se_portal_group *se_tpg = lun->lun_tpg; 686 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 687 688 if (tf->tf_ops->fabric_pre_unlink) { 689 /* 690 * Call the optional fabric_pre_unlink() to allow a 691 * fabric module to release any additional stat before 692 * core_dev_del_lun() is called. 693 */ 694 tf->tf_ops->fabric_pre_unlink(se_tpg, lun); 695 } 696 697 core_dev_del_lun(se_tpg, lun); 698 } 699 700 static void target_fabric_port_release(struct config_item *item) 701 { 702 struct se_lun *lun = container_of(to_config_group(item), 703 struct se_lun, lun_group); 704 705 kfree_rcu(lun, rcu_head); 706 } 707 708 static struct configfs_item_operations target_fabric_port_item_ops = { 709 .release = target_fabric_port_release, 710 .allow_link = target_fabric_port_link, 711 .drop_link = target_fabric_port_unlink, 712 }; 713 714 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs); 715 716 /* End of tfc_tpg_port_cit */ 717 718 /* Start of tfc_tpg_port_stat_cit */ 719 720 static struct config_group *target_core_port_stat_mkdir( 721 struct config_group *group, 722 const char *name) 723 { 724 return ERR_PTR(-ENOSYS); 725 } 726 727 static void target_core_port_stat_rmdir( 728 struct config_group *group, 729 struct config_item *item) 730 { 731 return; 732 } 733 734 static struct configfs_group_operations target_fabric_port_stat_group_ops = { 735 .make_group = target_core_port_stat_mkdir, 736 .drop_item = target_core_port_stat_rmdir, 737 }; 738 739 TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL); 740 741 /* End of tfc_tpg_port_stat_cit */ 742 743 /* Start of tfc_tpg_lun_cit */ 744 745 static struct config_group *target_fabric_make_lun( 746 struct config_group *group, 747 const char *name) 748 { 749 struct se_lun *lun; 750 struct se_portal_group *se_tpg = container_of(group, 751 struct se_portal_group, tpg_lun_group); 752 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 753 unsigned long long unpacked_lun; 754 int errno; 755 756 if (strstr(name, "lun_") != name) { 757 pr_err("Unable to locate \'_\" in" 758 " \"lun_$LUN_NUMBER\"\n"); 759 return ERR_PTR(-EINVAL); 760 } 761 errno = kstrtoull(name + 4, 0, &unpacked_lun); 762 if (errno) 763 return ERR_PTR(errno); 764 765 lun = core_tpg_alloc_lun(se_tpg, unpacked_lun); 766 if (IS_ERR(lun)) 767 return ERR_CAST(lun); 768 769 config_group_init_type_name(&lun->lun_group, name, 770 &tf->tf_tpg_port_cit); 771 772 config_group_init_type_name(&lun->port_stat_grps.stat_group, 773 "statistics", &tf->tf_tpg_port_stat_cit); 774 configfs_add_default_group(&lun->port_stat_grps.stat_group, 775 &lun->lun_group); 776 777 target_stat_setup_port_default_groups(lun); 778 779 return &lun->lun_group; 780 } 781 782 static void target_fabric_drop_lun( 783 struct config_group *group, 784 struct config_item *item) 785 { 786 struct se_lun *lun = container_of(to_config_group(item), 787 struct se_lun, lun_group); 788 789 configfs_remove_default_groups(&lun->port_stat_grps.stat_group); 790 configfs_remove_default_groups(&lun->lun_group); 791 792 config_item_put(item); 793 } 794 795 static struct configfs_group_operations target_fabric_lun_group_ops = { 796 .make_group = &target_fabric_make_lun, 797 .drop_item = &target_fabric_drop_lun, 798 }; 799 800 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL); 801 802 /* End of tfc_tpg_lun_cit */ 803 804 TF_CIT_SETUP_DRV(tpg_attrib, NULL, NULL); 805 TF_CIT_SETUP_DRV(tpg_auth, NULL, NULL); 806 TF_CIT_SETUP_DRV(tpg_param, NULL, NULL); 807 808 /* Start of tfc_tpg_base_cit */ 809 810 static void target_fabric_tpg_release(struct config_item *item) 811 { 812 struct se_portal_group *se_tpg = container_of(to_config_group(item), 813 struct se_portal_group, tpg_group); 814 struct se_wwn *wwn = se_tpg->se_tpg_wwn; 815 struct target_fabric_configfs *tf = wwn->wwn_tf; 816 817 tf->tf_ops->fabric_drop_tpg(se_tpg); 818 } 819 820 static struct configfs_item_operations target_fabric_tpg_base_item_ops = { 821 .release = target_fabric_tpg_release, 822 }; 823 824 TF_CIT_SETUP_DRV(tpg_base, &target_fabric_tpg_base_item_ops, NULL); 825 826 /* End of tfc_tpg_base_cit */ 827 828 /* Start of tfc_tpg_cit */ 829 830 static struct config_group *target_fabric_make_tpg( 831 struct config_group *group, 832 const char *name) 833 { 834 struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group); 835 struct target_fabric_configfs *tf = wwn->wwn_tf; 836 struct se_portal_group *se_tpg; 837 838 if (!tf->tf_ops->fabric_make_tpg) { 839 pr_err("tf->tf_ops->fabric_make_tpg is NULL\n"); 840 return ERR_PTR(-ENOSYS); 841 } 842 843 se_tpg = tf->tf_ops->fabric_make_tpg(wwn, group, name); 844 if (!se_tpg || IS_ERR(se_tpg)) 845 return ERR_PTR(-EINVAL); 846 847 config_group_init_type_name(&se_tpg->tpg_group, name, 848 &tf->tf_tpg_base_cit); 849 850 config_group_init_type_name(&se_tpg->tpg_lun_group, "lun", 851 &tf->tf_tpg_lun_cit); 852 configfs_add_default_group(&se_tpg->tpg_lun_group, 853 &se_tpg->tpg_group); 854 855 config_group_init_type_name(&se_tpg->tpg_np_group, "np", 856 &tf->tf_tpg_np_cit); 857 configfs_add_default_group(&se_tpg->tpg_np_group, 858 &se_tpg->tpg_group); 859 860 config_group_init_type_name(&se_tpg->tpg_acl_group, "acls", 861 &tf->tf_tpg_nacl_cit); 862 configfs_add_default_group(&se_tpg->tpg_acl_group, 863 &se_tpg->tpg_group); 864 865 config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib", 866 &tf->tf_tpg_attrib_cit); 867 configfs_add_default_group(&se_tpg->tpg_attrib_group, 868 &se_tpg->tpg_group); 869 870 config_group_init_type_name(&se_tpg->tpg_auth_group, "auth", 871 &tf->tf_tpg_auth_cit); 872 configfs_add_default_group(&se_tpg->tpg_auth_group, 873 &se_tpg->tpg_group); 874 875 config_group_init_type_name(&se_tpg->tpg_param_group, "param", 876 &tf->tf_tpg_param_cit); 877 configfs_add_default_group(&se_tpg->tpg_param_group, 878 &se_tpg->tpg_group); 879 880 return &se_tpg->tpg_group; 881 } 882 883 static void target_fabric_drop_tpg( 884 struct config_group *group, 885 struct config_item *item) 886 { 887 struct se_portal_group *se_tpg = container_of(to_config_group(item), 888 struct se_portal_group, tpg_group); 889 890 configfs_remove_default_groups(&se_tpg->tpg_group); 891 config_item_put(item); 892 } 893 894 static void target_fabric_release_wwn(struct config_item *item) 895 { 896 struct se_wwn *wwn = container_of(to_config_group(item), 897 struct se_wwn, wwn_group); 898 struct target_fabric_configfs *tf = wwn->wwn_tf; 899 900 configfs_remove_default_groups(&wwn->fabric_stat_group); 901 tf->tf_ops->fabric_drop_wwn(wwn); 902 } 903 904 static struct configfs_item_operations target_fabric_tpg_item_ops = { 905 .release = target_fabric_release_wwn, 906 }; 907 908 static struct configfs_group_operations target_fabric_tpg_group_ops = { 909 .make_group = target_fabric_make_tpg, 910 .drop_item = target_fabric_drop_tpg, 911 }; 912 913 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops, 914 NULL); 915 916 /* End of tfc_tpg_cit */ 917 918 /* Start of tfc_wwn_fabric_stats_cit */ 919 /* 920 * This is used as a placeholder for struct se_wwn->fabric_stat_group 921 * to allow fabrics access to ->fabric_stat_group->default_groups[] 922 */ 923 TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL); 924 925 /* End of tfc_wwn_fabric_stats_cit */ 926 927 /* Start of tfc_wwn_cit */ 928 929 static struct config_group *target_fabric_make_wwn( 930 struct config_group *group, 931 const char *name) 932 { 933 struct target_fabric_configfs *tf = container_of(group, 934 struct target_fabric_configfs, tf_group); 935 struct se_wwn *wwn; 936 937 if (!tf->tf_ops->fabric_make_wwn) { 938 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n"); 939 return ERR_PTR(-ENOSYS); 940 } 941 942 wwn = tf->tf_ops->fabric_make_wwn(tf, group, name); 943 if (!wwn || IS_ERR(wwn)) 944 return ERR_PTR(-EINVAL); 945 946 wwn->wwn_tf = tf; 947 948 config_group_init_type_name(&wwn->wwn_group, name, &tf->tf_tpg_cit); 949 950 config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics", 951 &tf->tf_wwn_fabric_stats_cit); 952 configfs_add_default_group(&wwn->fabric_stat_group, &wwn->wwn_group); 953 954 if (tf->tf_ops->add_wwn_groups) 955 tf->tf_ops->add_wwn_groups(wwn); 956 return &wwn->wwn_group; 957 } 958 959 static void target_fabric_drop_wwn( 960 struct config_group *group, 961 struct config_item *item) 962 { 963 struct se_wwn *wwn = container_of(to_config_group(item), 964 struct se_wwn, wwn_group); 965 966 configfs_remove_default_groups(&wwn->wwn_group); 967 config_item_put(item); 968 } 969 970 static struct configfs_group_operations target_fabric_wwn_group_ops = { 971 .make_group = target_fabric_make_wwn, 972 .drop_item = target_fabric_drop_wwn, 973 }; 974 975 TF_CIT_SETUP_DRV(wwn, NULL, &target_fabric_wwn_group_ops); 976 TF_CIT_SETUP_DRV(discovery, NULL, NULL); 977 978 int target_fabric_setup_cits(struct target_fabric_configfs *tf) 979 { 980 target_fabric_setup_discovery_cit(tf); 981 target_fabric_setup_wwn_cit(tf); 982 target_fabric_setup_wwn_fabric_stats_cit(tf); 983 target_fabric_setup_tpg_cit(tf); 984 target_fabric_setup_tpg_base_cit(tf); 985 target_fabric_setup_tpg_port_cit(tf); 986 target_fabric_setup_tpg_port_stat_cit(tf); 987 target_fabric_setup_tpg_lun_cit(tf); 988 target_fabric_setup_tpg_np_cit(tf); 989 target_fabric_setup_tpg_np_base_cit(tf); 990 target_fabric_setup_tpg_attrib_cit(tf); 991 target_fabric_setup_tpg_auth_cit(tf); 992 target_fabric_setup_tpg_param_cit(tf); 993 target_fabric_setup_tpg_nacl_cit(tf); 994 target_fabric_setup_tpg_nacl_base_cit(tf); 995 target_fabric_setup_tpg_nacl_attrib_cit(tf); 996 target_fabric_setup_tpg_nacl_auth_cit(tf); 997 target_fabric_setup_tpg_nacl_param_cit(tf); 998 target_fabric_setup_tpg_nacl_stat_cit(tf); 999 target_fabric_setup_tpg_mappedlun_cit(tf); 1000 target_fabric_setup_tpg_mappedlun_stat_cit(tf); 1001 1002 return 0; 1003 } 1004