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 static struct configfs_item_operations target_fabric_port_item_ops; 69 70 /* Start of tfc_tpg_mappedlun_cit */ 71 72 static int target_fabric_mappedlun_link( 73 struct config_item *lun_acl_ci, 74 struct config_item *lun_ci) 75 { 76 struct se_dev_entry *deve; 77 struct se_lun *lun; 78 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci), 79 struct se_lun_acl, se_lun_group); 80 struct se_portal_group *se_tpg; 81 struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s; 82 bool lun_access_ro; 83 84 if (!lun_ci->ci_type || 85 lun_ci->ci_type->ct_item_ops != &target_fabric_port_item_ops) { 86 pr_err("Bad lun_ci, not a valid lun_ci pointer: %p\n", lun_ci); 87 return -EFAULT; 88 } 89 lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group); 90 91 /* 92 * Ensure that the source port exists 93 */ 94 if (!lun->lun_se_dev) { 95 pr_err("Source se_lun->lun_se_dev does not exist\n"); 96 return -EINVAL; 97 } 98 if (lun->lun_shutdown) { 99 pr_err("Unable to create mappedlun symlink because" 100 " lun->lun_shutdown=true\n"); 101 return -EINVAL; 102 } 103 se_tpg = lun->lun_tpg; 104 105 nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item; 106 tpg_ci = &nacl_ci->ci_group->cg_item; 107 wwn_ci = &tpg_ci->ci_group->cg_item; 108 tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item; 109 wwn_ci_s = &tpg_ci_s->ci_group->cg_item; 110 /* 111 * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT 112 */ 113 if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) { 114 pr_err("Illegal Initiator ACL SymLink outside of %s\n", 115 config_item_name(wwn_ci)); 116 return -EINVAL; 117 } 118 if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) { 119 pr_err("Illegal Initiator ACL Symlink outside of %s" 120 " TPGT: %s\n", config_item_name(wwn_ci), 121 config_item_name(tpg_ci)); 122 return -EINVAL; 123 } 124 /* 125 * If this struct se_node_acl was dynamically generated with 126 * tpg_1/attrib/generate_node_acls=1, use the existing 127 * deve->lun_access_ro value, which will be true when 128 * tpg_1/attrib/demo_mode_write_protect=1 129 */ 130 rcu_read_lock(); 131 deve = target_nacl_find_deve(lacl->se_lun_nacl, lacl->mapped_lun); 132 if (deve) 133 lun_access_ro = deve->lun_access_ro; 134 else 135 lun_access_ro = 136 (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect( 137 se_tpg)) ? true : false; 138 rcu_read_unlock(); 139 /* 140 * Determine the actual mapped LUN value user wants.. 141 * 142 * This value is what the SCSI Initiator actually sees the 143 * $FABRIC/$WWPN/$TPGT/lun/lun_* as on their SCSI Initiator Ports. 144 */ 145 return core_dev_add_initiator_node_lun_acl(se_tpg, lacl, lun, lun_access_ro); 146 } 147 148 static void target_fabric_mappedlun_unlink( 149 struct config_item *lun_acl_ci, 150 struct config_item *lun_ci) 151 { 152 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci), 153 struct se_lun_acl, se_lun_group); 154 struct se_lun *lun = container_of(to_config_group(lun_ci), 155 struct se_lun, lun_group); 156 157 core_dev_del_initiator_node_lun_acl(lun, lacl); 158 } 159 160 static struct se_lun_acl *item_to_lun_acl(struct config_item *item) 161 { 162 return container_of(to_config_group(item), struct se_lun_acl, 163 se_lun_group); 164 } 165 166 static ssize_t target_fabric_mappedlun_write_protect_show( 167 struct config_item *item, char *page) 168 { 169 struct se_lun_acl *lacl = item_to_lun_acl(item); 170 struct se_node_acl *se_nacl = lacl->se_lun_nacl; 171 struct se_dev_entry *deve; 172 ssize_t len = 0; 173 174 rcu_read_lock(); 175 deve = target_nacl_find_deve(se_nacl, lacl->mapped_lun); 176 if (deve) { 177 len = sprintf(page, "%d\n", deve->lun_access_ro); 178 } 179 rcu_read_unlock(); 180 181 return len; 182 } 183 184 static ssize_t target_fabric_mappedlun_write_protect_store( 185 struct config_item *item, const char *page, size_t count) 186 { 187 struct se_lun_acl *lacl = item_to_lun_acl(item); 188 struct se_node_acl *se_nacl = lacl->se_lun_nacl; 189 struct se_portal_group *se_tpg = se_nacl->se_tpg; 190 unsigned long wp; 191 int ret; 192 193 ret = kstrtoul(page, 0, &wp); 194 if (ret) 195 return ret; 196 197 if ((wp != 1) && (wp != 0)) 198 return -EINVAL; 199 200 /* wp=1 means lun_access_ro=true */ 201 core_update_device_list_access(lacl->mapped_lun, wp, lacl->se_lun_nacl); 202 203 pr_debug("%s_ConfigFS: Changed Initiator ACL: %s" 204 " Mapped LUN: %llu Write Protect bit to %s\n", 205 se_tpg->se_tpg_tfo->get_fabric_name(), 206 se_nacl->initiatorname, lacl->mapped_lun, (wp) ? "ON" : "OFF"); 207 208 return count; 209 210 } 211 212 CONFIGFS_ATTR(target_fabric_mappedlun_, write_protect); 213 214 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = { 215 &target_fabric_mappedlun_attr_write_protect, 216 NULL, 217 }; 218 219 static void target_fabric_mappedlun_release(struct config_item *item) 220 { 221 struct se_lun_acl *lacl = container_of(to_config_group(item), 222 struct se_lun_acl, se_lun_group); 223 struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg; 224 225 core_dev_free_initiator_node_lun_acl(se_tpg, lacl); 226 } 227 228 static struct configfs_item_operations target_fabric_mappedlun_item_ops = { 229 .release = target_fabric_mappedlun_release, 230 .allow_link = target_fabric_mappedlun_link, 231 .drop_link = target_fabric_mappedlun_unlink, 232 }; 233 234 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL, 235 target_fabric_mappedlun_attrs); 236 237 /* End of tfc_tpg_mappedlun_cit */ 238 239 /* Start of tfc_tpg_mappedlun_port_cit */ 240 241 static struct config_group *target_core_mappedlun_stat_mkdir( 242 struct config_group *group, 243 const char *name) 244 { 245 return ERR_PTR(-ENOSYS); 246 } 247 248 static void target_core_mappedlun_stat_rmdir( 249 struct config_group *group, 250 struct config_item *item) 251 { 252 return; 253 } 254 255 static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = { 256 .make_group = target_core_mappedlun_stat_mkdir, 257 .drop_item = target_core_mappedlun_stat_rmdir, 258 }; 259 260 TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops, 261 NULL); 262 263 /* End of tfc_tpg_mappedlun_port_cit */ 264 265 TF_CIT_SETUP_DRV(tpg_nacl_attrib, NULL, NULL); 266 TF_CIT_SETUP_DRV(tpg_nacl_auth, NULL, NULL); 267 TF_CIT_SETUP_DRV(tpg_nacl_param, NULL, NULL); 268 269 /* Start of tfc_tpg_nacl_base_cit */ 270 271 static struct config_group *target_fabric_make_mappedlun( 272 struct config_group *group, 273 const char *name) 274 { 275 struct se_node_acl *se_nacl = container_of(group, 276 struct se_node_acl, acl_group); 277 struct se_portal_group *se_tpg = se_nacl->se_tpg; 278 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 279 struct se_lun_acl *lacl = NULL; 280 char *buf; 281 unsigned long long mapped_lun; 282 int ret = 0; 283 284 buf = kzalloc(strlen(name) + 1, GFP_KERNEL); 285 if (!buf) { 286 pr_err("Unable to allocate memory for name buf\n"); 287 return ERR_PTR(-ENOMEM); 288 } 289 snprintf(buf, strlen(name) + 1, "%s", name); 290 /* 291 * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID. 292 */ 293 if (strstr(buf, "lun_") != buf) { 294 pr_err("Unable to locate \"lun_\" from buf: %s" 295 " name: %s\n", buf, name); 296 ret = -EINVAL; 297 goto out; 298 } 299 /* 300 * Determine the Mapped LUN value. This is what the SCSI Initiator 301 * Port will actually see. 302 */ 303 ret = kstrtoull(buf + 4, 0, &mapped_lun); 304 if (ret) 305 goto out; 306 307 lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl, 308 mapped_lun, &ret); 309 if (!lacl) { 310 ret = -EINVAL; 311 goto out; 312 } 313 314 config_group_init_type_name(&lacl->se_lun_group, name, 315 &tf->tf_tpg_mappedlun_cit); 316 317 config_group_init_type_name(&lacl->ml_stat_grps.stat_group, 318 "statistics", &tf->tf_tpg_mappedlun_stat_cit); 319 configfs_add_default_group(&lacl->ml_stat_grps.stat_group, 320 &lacl->se_lun_group); 321 322 target_stat_setup_mappedlun_default_groups(lacl); 323 324 kfree(buf); 325 return &lacl->se_lun_group; 326 out: 327 kfree(lacl); 328 kfree(buf); 329 return ERR_PTR(ret); 330 } 331 332 static void target_fabric_drop_mappedlun( 333 struct config_group *group, 334 struct config_item *item) 335 { 336 struct se_lun_acl *lacl = container_of(to_config_group(item), 337 struct se_lun_acl, se_lun_group); 338 339 configfs_remove_default_groups(&lacl->ml_stat_grps.stat_group); 340 configfs_remove_default_groups(&lacl->se_lun_group); 341 342 config_item_put(item); 343 } 344 345 static void target_fabric_nacl_base_release(struct config_item *item) 346 { 347 struct se_node_acl *se_nacl = container_of(to_config_group(item), 348 struct se_node_acl, acl_group); 349 350 configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group); 351 core_tpg_del_initiator_node_acl(se_nacl); 352 } 353 354 static struct configfs_item_operations target_fabric_nacl_base_item_ops = { 355 .release = target_fabric_nacl_base_release, 356 }; 357 358 static struct configfs_group_operations target_fabric_nacl_base_group_ops = { 359 .make_group = target_fabric_make_mappedlun, 360 .drop_item = target_fabric_drop_mappedlun, 361 }; 362 363 TF_CIT_SETUP_DRV(tpg_nacl_base, &target_fabric_nacl_base_item_ops, 364 &target_fabric_nacl_base_group_ops); 365 366 /* End of tfc_tpg_nacl_base_cit */ 367 368 /* Start of tfc_node_fabric_stats_cit */ 369 /* 370 * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group 371 * to allow fabrics access to ->acl_fabric_stat_group->default_groups[] 372 */ 373 TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL); 374 375 /* End of tfc_wwn_fabric_stats_cit */ 376 377 /* Start of tfc_tpg_nacl_cit */ 378 379 static struct config_group *target_fabric_make_nodeacl( 380 struct config_group *group, 381 const char *name) 382 { 383 struct se_portal_group *se_tpg = container_of(group, 384 struct se_portal_group, tpg_acl_group); 385 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 386 struct se_node_acl *se_nacl; 387 388 se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name); 389 if (IS_ERR(se_nacl)) 390 return ERR_CAST(se_nacl); 391 392 config_group_init_type_name(&se_nacl->acl_group, name, 393 &tf->tf_tpg_nacl_base_cit); 394 395 config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib", 396 &tf->tf_tpg_nacl_attrib_cit); 397 configfs_add_default_group(&se_nacl->acl_attrib_group, 398 &se_nacl->acl_group); 399 400 config_group_init_type_name(&se_nacl->acl_auth_group, "auth", 401 &tf->tf_tpg_nacl_auth_cit); 402 configfs_add_default_group(&se_nacl->acl_auth_group, 403 &se_nacl->acl_group); 404 405 config_group_init_type_name(&se_nacl->acl_param_group, "param", 406 &tf->tf_tpg_nacl_param_cit); 407 configfs_add_default_group(&se_nacl->acl_param_group, 408 &se_nacl->acl_group); 409 410 config_group_init_type_name(&se_nacl->acl_fabric_stat_group, 411 "fabric_statistics", &tf->tf_tpg_nacl_stat_cit); 412 configfs_add_default_group(&se_nacl->acl_fabric_stat_group, 413 &se_nacl->acl_group); 414 415 if (tf->tf_ops->fabric_init_nodeacl) { 416 int ret = tf->tf_ops->fabric_init_nodeacl(se_nacl, name); 417 if (ret) { 418 configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group); 419 core_tpg_del_initiator_node_acl(se_nacl); 420 return ERR_PTR(ret); 421 } 422 } 423 424 return &se_nacl->acl_group; 425 } 426 427 static void target_fabric_drop_nodeacl( 428 struct config_group *group, 429 struct config_item *item) 430 { 431 struct se_node_acl *se_nacl = container_of(to_config_group(item), 432 struct se_node_acl, acl_group); 433 434 configfs_remove_default_groups(&se_nacl->acl_group); 435 436 /* 437 * struct se_node_acl free is done in target_fabric_nacl_base_release() 438 */ 439 config_item_put(item); 440 } 441 442 static struct configfs_group_operations target_fabric_nacl_group_ops = { 443 .make_group = target_fabric_make_nodeacl, 444 .drop_item = target_fabric_drop_nodeacl, 445 }; 446 447 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL); 448 449 /* End of tfc_tpg_nacl_cit */ 450 451 /* Start of tfc_tpg_np_base_cit */ 452 453 static void target_fabric_np_base_release(struct config_item *item) 454 { 455 struct se_tpg_np *se_tpg_np = container_of(to_config_group(item), 456 struct se_tpg_np, tpg_np_group); 457 struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent; 458 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 459 460 tf->tf_ops->fabric_drop_np(se_tpg_np); 461 } 462 463 static struct configfs_item_operations target_fabric_np_base_item_ops = { 464 .release = target_fabric_np_base_release, 465 }; 466 467 TF_CIT_SETUP_DRV(tpg_np_base, &target_fabric_np_base_item_ops, NULL); 468 469 /* End of tfc_tpg_np_base_cit */ 470 471 /* Start of tfc_tpg_np_cit */ 472 473 static struct config_group *target_fabric_make_np( 474 struct config_group *group, 475 const char *name) 476 { 477 struct se_portal_group *se_tpg = container_of(group, 478 struct se_portal_group, tpg_np_group); 479 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 480 struct se_tpg_np *se_tpg_np; 481 482 if (!tf->tf_ops->fabric_make_np) { 483 pr_err("tf->tf_ops.fabric_make_np is NULL\n"); 484 return ERR_PTR(-ENOSYS); 485 } 486 487 se_tpg_np = tf->tf_ops->fabric_make_np(se_tpg, group, name); 488 if (!se_tpg_np || IS_ERR(se_tpg_np)) 489 return ERR_PTR(-EINVAL); 490 491 se_tpg_np->tpg_np_parent = se_tpg; 492 config_group_init_type_name(&se_tpg_np->tpg_np_group, name, 493 &tf->tf_tpg_np_base_cit); 494 495 return &se_tpg_np->tpg_np_group; 496 } 497 498 static void target_fabric_drop_np( 499 struct config_group *group, 500 struct config_item *item) 501 { 502 /* 503 * struct se_tpg_np is released via target_fabric_np_base_release() 504 */ 505 config_item_put(item); 506 } 507 508 static struct configfs_group_operations target_fabric_np_group_ops = { 509 .make_group = &target_fabric_make_np, 510 .drop_item = &target_fabric_drop_np, 511 }; 512 513 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL); 514 515 /* End of tfc_tpg_np_cit */ 516 517 /* Start of tfc_tpg_port_cit */ 518 519 static struct se_lun *item_to_lun(struct config_item *item) 520 { 521 return container_of(to_config_group(item), struct se_lun, 522 lun_group); 523 } 524 525 static ssize_t target_fabric_port_alua_tg_pt_gp_show(struct config_item *item, 526 char *page) 527 { 528 struct se_lun *lun = item_to_lun(item); 529 530 if (!lun || !lun->lun_se_dev) 531 return -ENODEV; 532 533 return core_alua_show_tg_pt_gp_info(lun, page); 534 } 535 536 static ssize_t target_fabric_port_alua_tg_pt_gp_store(struct config_item *item, 537 const char *page, size_t count) 538 { 539 struct se_lun *lun = item_to_lun(item); 540 541 if (!lun || !lun->lun_se_dev) 542 return -ENODEV; 543 544 return core_alua_store_tg_pt_gp_info(lun, page, count); 545 } 546 547 static ssize_t target_fabric_port_alua_tg_pt_offline_show( 548 struct config_item *item, char *page) 549 { 550 struct se_lun *lun = item_to_lun(item); 551 552 if (!lun || !lun->lun_se_dev) 553 return -ENODEV; 554 555 return core_alua_show_offline_bit(lun, page); 556 } 557 558 static ssize_t target_fabric_port_alua_tg_pt_offline_store( 559 struct config_item *item, const char *page, size_t count) 560 { 561 struct se_lun *lun = item_to_lun(item); 562 563 if (!lun || !lun->lun_se_dev) 564 return -ENODEV; 565 566 return core_alua_store_offline_bit(lun, page, count); 567 } 568 569 static ssize_t target_fabric_port_alua_tg_pt_status_show( 570 struct config_item *item, char *page) 571 { 572 struct se_lun *lun = item_to_lun(item); 573 574 if (!lun || !lun->lun_se_dev) 575 return -ENODEV; 576 577 return core_alua_show_secondary_status(lun, page); 578 } 579 580 static ssize_t target_fabric_port_alua_tg_pt_status_store( 581 struct config_item *item, const char *page, size_t count) 582 { 583 struct se_lun *lun = item_to_lun(item); 584 585 if (!lun || !lun->lun_se_dev) 586 return -ENODEV; 587 588 return core_alua_store_secondary_status(lun, page, count); 589 } 590 591 static ssize_t target_fabric_port_alua_tg_pt_write_md_show( 592 struct config_item *item, char *page) 593 { 594 struct se_lun *lun = item_to_lun(item); 595 596 if (!lun || !lun->lun_se_dev) 597 return -ENODEV; 598 599 return core_alua_show_secondary_write_metadata(lun, page); 600 } 601 602 static ssize_t target_fabric_port_alua_tg_pt_write_md_store( 603 struct config_item *item, const char *page, size_t count) 604 { 605 struct se_lun *lun = item_to_lun(item); 606 607 if (!lun || !lun->lun_se_dev) 608 return -ENODEV; 609 610 return core_alua_store_secondary_write_metadata(lun, page, count); 611 } 612 613 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_gp); 614 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_offline); 615 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_status); 616 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_write_md); 617 618 static struct configfs_attribute *target_fabric_port_attrs[] = { 619 &target_fabric_port_attr_alua_tg_pt_gp, 620 &target_fabric_port_attr_alua_tg_pt_offline, 621 &target_fabric_port_attr_alua_tg_pt_status, 622 &target_fabric_port_attr_alua_tg_pt_write_md, 623 NULL, 624 }; 625 626 extern struct configfs_item_operations target_core_dev_item_ops; 627 628 static int target_fabric_port_link( 629 struct config_item *lun_ci, 630 struct config_item *se_dev_ci) 631 { 632 struct config_item *tpg_ci; 633 struct se_lun *lun = container_of(to_config_group(lun_ci), 634 struct se_lun, lun_group); 635 struct se_portal_group *se_tpg; 636 struct se_device *dev; 637 struct target_fabric_configfs *tf; 638 int ret; 639 640 if (!se_dev_ci->ci_type || 641 se_dev_ci->ci_type->ct_item_ops != &target_core_dev_item_ops) { 642 pr_err("Bad se_dev_ci, not a valid se_dev_ci pointer: %p\n", se_dev_ci); 643 return -EFAULT; 644 } 645 dev = container_of(to_config_group(se_dev_ci), struct se_device, dev_group); 646 647 if (!(dev->dev_flags & DF_CONFIGURED)) { 648 pr_err("se_device not configured yet, cannot port link\n"); 649 return -ENODEV; 650 } 651 652 tpg_ci = &lun_ci->ci_parent->ci_group->cg_item; 653 se_tpg = container_of(to_config_group(tpg_ci), 654 struct se_portal_group, tpg_group); 655 tf = se_tpg->se_tpg_wwn->wwn_tf; 656 657 if (lun->lun_se_dev != NULL) { 658 pr_err("Port Symlink already exists\n"); 659 return -EEXIST; 660 } 661 662 ret = core_dev_add_lun(se_tpg, dev, lun); 663 if (ret) { 664 pr_err("core_dev_add_lun() failed: %d\n", ret); 665 goto out; 666 } 667 668 if (tf->tf_ops->fabric_post_link) { 669 /* 670 * Call the optional fabric_post_link() to allow a 671 * fabric module to setup any additional state once 672 * core_dev_add_lun() has been called.. 673 */ 674 tf->tf_ops->fabric_post_link(se_tpg, lun); 675 } 676 677 return 0; 678 out: 679 return ret; 680 } 681 682 static void target_fabric_port_unlink( 683 struct config_item *lun_ci, 684 struct config_item *se_dev_ci) 685 { 686 struct se_lun *lun = container_of(to_config_group(lun_ci), 687 struct se_lun, lun_group); 688 struct se_portal_group *se_tpg = lun->lun_tpg; 689 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 690 691 if (tf->tf_ops->fabric_pre_unlink) { 692 /* 693 * Call the optional fabric_pre_unlink() to allow a 694 * fabric module to release any additional stat before 695 * core_dev_del_lun() is called. 696 */ 697 tf->tf_ops->fabric_pre_unlink(se_tpg, lun); 698 } 699 700 core_dev_del_lun(se_tpg, lun); 701 } 702 703 static void target_fabric_port_release(struct config_item *item) 704 { 705 struct se_lun *lun = container_of(to_config_group(item), 706 struct se_lun, lun_group); 707 708 kfree_rcu(lun, rcu_head); 709 } 710 711 static struct configfs_item_operations target_fabric_port_item_ops = { 712 .release = target_fabric_port_release, 713 .allow_link = target_fabric_port_link, 714 .drop_link = target_fabric_port_unlink, 715 }; 716 717 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs); 718 719 /* End of tfc_tpg_port_cit */ 720 721 /* Start of tfc_tpg_port_stat_cit */ 722 723 static struct config_group *target_core_port_stat_mkdir( 724 struct config_group *group, 725 const char *name) 726 { 727 return ERR_PTR(-ENOSYS); 728 } 729 730 static void target_core_port_stat_rmdir( 731 struct config_group *group, 732 struct config_item *item) 733 { 734 return; 735 } 736 737 static struct configfs_group_operations target_fabric_port_stat_group_ops = { 738 .make_group = target_core_port_stat_mkdir, 739 .drop_item = target_core_port_stat_rmdir, 740 }; 741 742 TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL); 743 744 /* End of tfc_tpg_port_stat_cit */ 745 746 /* Start of tfc_tpg_lun_cit */ 747 748 static struct config_group *target_fabric_make_lun( 749 struct config_group *group, 750 const char *name) 751 { 752 struct se_lun *lun; 753 struct se_portal_group *se_tpg = container_of(group, 754 struct se_portal_group, tpg_lun_group); 755 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 756 unsigned long long unpacked_lun; 757 int errno; 758 759 if (strstr(name, "lun_") != name) { 760 pr_err("Unable to locate \'_\" in" 761 " \"lun_$LUN_NUMBER\"\n"); 762 return ERR_PTR(-EINVAL); 763 } 764 errno = kstrtoull(name + 4, 0, &unpacked_lun); 765 if (errno) 766 return ERR_PTR(errno); 767 768 lun = core_tpg_alloc_lun(se_tpg, unpacked_lun); 769 if (IS_ERR(lun)) 770 return ERR_CAST(lun); 771 772 config_group_init_type_name(&lun->lun_group, name, 773 &tf->tf_tpg_port_cit); 774 775 config_group_init_type_name(&lun->port_stat_grps.stat_group, 776 "statistics", &tf->tf_tpg_port_stat_cit); 777 configfs_add_default_group(&lun->port_stat_grps.stat_group, 778 &lun->lun_group); 779 780 target_stat_setup_port_default_groups(lun); 781 782 return &lun->lun_group; 783 } 784 785 static void target_fabric_drop_lun( 786 struct config_group *group, 787 struct config_item *item) 788 { 789 struct se_lun *lun = container_of(to_config_group(item), 790 struct se_lun, lun_group); 791 792 configfs_remove_default_groups(&lun->port_stat_grps.stat_group); 793 configfs_remove_default_groups(&lun->lun_group); 794 795 config_item_put(item); 796 } 797 798 static struct configfs_group_operations target_fabric_lun_group_ops = { 799 .make_group = &target_fabric_make_lun, 800 .drop_item = &target_fabric_drop_lun, 801 }; 802 803 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL); 804 805 /* End of tfc_tpg_lun_cit */ 806 807 TF_CIT_SETUP_DRV(tpg_attrib, NULL, NULL); 808 TF_CIT_SETUP_DRV(tpg_auth, NULL, NULL); 809 TF_CIT_SETUP_DRV(tpg_param, NULL, NULL); 810 811 /* Start of tfc_tpg_base_cit */ 812 813 static void target_fabric_tpg_release(struct config_item *item) 814 { 815 struct se_portal_group *se_tpg = container_of(to_config_group(item), 816 struct se_portal_group, tpg_group); 817 struct se_wwn *wwn = se_tpg->se_tpg_wwn; 818 struct target_fabric_configfs *tf = wwn->wwn_tf; 819 820 tf->tf_ops->fabric_drop_tpg(se_tpg); 821 } 822 823 static struct configfs_item_operations target_fabric_tpg_base_item_ops = { 824 .release = target_fabric_tpg_release, 825 }; 826 827 TF_CIT_SETUP_DRV(tpg_base, &target_fabric_tpg_base_item_ops, NULL); 828 829 /* End of tfc_tpg_base_cit */ 830 831 /* Start of tfc_tpg_cit */ 832 833 static struct config_group *target_fabric_make_tpg( 834 struct config_group *group, 835 const char *name) 836 { 837 struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group); 838 struct target_fabric_configfs *tf = wwn->wwn_tf; 839 struct se_portal_group *se_tpg; 840 841 if (!tf->tf_ops->fabric_make_tpg) { 842 pr_err("tf->tf_ops->fabric_make_tpg is NULL\n"); 843 return ERR_PTR(-ENOSYS); 844 } 845 846 se_tpg = tf->tf_ops->fabric_make_tpg(wwn, group, name); 847 if (!se_tpg || IS_ERR(se_tpg)) 848 return ERR_PTR(-EINVAL); 849 850 config_group_init_type_name(&se_tpg->tpg_group, name, 851 &tf->tf_tpg_base_cit); 852 853 config_group_init_type_name(&se_tpg->tpg_lun_group, "lun", 854 &tf->tf_tpg_lun_cit); 855 configfs_add_default_group(&se_tpg->tpg_lun_group, 856 &se_tpg->tpg_group); 857 858 config_group_init_type_name(&se_tpg->tpg_np_group, "np", 859 &tf->tf_tpg_np_cit); 860 configfs_add_default_group(&se_tpg->tpg_np_group, 861 &se_tpg->tpg_group); 862 863 config_group_init_type_name(&se_tpg->tpg_acl_group, "acls", 864 &tf->tf_tpg_nacl_cit); 865 configfs_add_default_group(&se_tpg->tpg_acl_group, 866 &se_tpg->tpg_group); 867 868 config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib", 869 &tf->tf_tpg_attrib_cit); 870 configfs_add_default_group(&se_tpg->tpg_attrib_group, 871 &se_tpg->tpg_group); 872 873 config_group_init_type_name(&se_tpg->tpg_auth_group, "auth", 874 &tf->tf_tpg_auth_cit); 875 configfs_add_default_group(&se_tpg->tpg_auth_group, 876 &se_tpg->tpg_group); 877 878 config_group_init_type_name(&se_tpg->tpg_param_group, "param", 879 &tf->tf_tpg_param_cit); 880 configfs_add_default_group(&se_tpg->tpg_param_group, 881 &se_tpg->tpg_group); 882 883 return &se_tpg->tpg_group; 884 } 885 886 static void target_fabric_drop_tpg( 887 struct config_group *group, 888 struct config_item *item) 889 { 890 struct se_portal_group *se_tpg = container_of(to_config_group(item), 891 struct se_portal_group, tpg_group); 892 893 configfs_remove_default_groups(&se_tpg->tpg_group); 894 config_item_put(item); 895 } 896 897 static void target_fabric_release_wwn(struct config_item *item) 898 { 899 struct se_wwn *wwn = container_of(to_config_group(item), 900 struct se_wwn, wwn_group); 901 struct target_fabric_configfs *tf = wwn->wwn_tf; 902 903 configfs_remove_default_groups(&wwn->fabric_stat_group); 904 tf->tf_ops->fabric_drop_wwn(wwn); 905 } 906 907 static struct configfs_item_operations target_fabric_tpg_item_ops = { 908 .release = target_fabric_release_wwn, 909 }; 910 911 static struct configfs_group_operations target_fabric_tpg_group_ops = { 912 .make_group = target_fabric_make_tpg, 913 .drop_item = target_fabric_drop_tpg, 914 }; 915 916 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops, 917 NULL); 918 919 /* End of tfc_tpg_cit */ 920 921 /* Start of tfc_wwn_fabric_stats_cit */ 922 /* 923 * This is used as a placeholder for struct se_wwn->fabric_stat_group 924 * to allow fabrics access to ->fabric_stat_group->default_groups[] 925 */ 926 TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL); 927 928 /* End of tfc_wwn_fabric_stats_cit */ 929 930 /* Start of tfc_wwn_cit */ 931 932 static struct config_group *target_fabric_make_wwn( 933 struct config_group *group, 934 const char *name) 935 { 936 struct target_fabric_configfs *tf = container_of(group, 937 struct target_fabric_configfs, tf_group); 938 struct se_wwn *wwn; 939 940 if (!tf->tf_ops->fabric_make_wwn) { 941 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n"); 942 return ERR_PTR(-ENOSYS); 943 } 944 945 wwn = tf->tf_ops->fabric_make_wwn(tf, group, name); 946 if (!wwn || IS_ERR(wwn)) 947 return ERR_PTR(-EINVAL); 948 949 wwn->wwn_tf = tf; 950 951 config_group_init_type_name(&wwn->wwn_group, name, &tf->tf_tpg_cit); 952 953 config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics", 954 &tf->tf_wwn_fabric_stats_cit); 955 configfs_add_default_group(&wwn->fabric_stat_group, &wwn->wwn_group); 956 957 if (tf->tf_ops->add_wwn_groups) 958 tf->tf_ops->add_wwn_groups(wwn); 959 return &wwn->wwn_group; 960 } 961 962 static void target_fabric_drop_wwn( 963 struct config_group *group, 964 struct config_item *item) 965 { 966 struct se_wwn *wwn = container_of(to_config_group(item), 967 struct se_wwn, wwn_group); 968 969 configfs_remove_default_groups(&wwn->wwn_group); 970 config_item_put(item); 971 } 972 973 static struct configfs_group_operations target_fabric_wwn_group_ops = { 974 .make_group = target_fabric_make_wwn, 975 .drop_item = target_fabric_drop_wwn, 976 }; 977 978 TF_CIT_SETUP_DRV(wwn, NULL, &target_fabric_wwn_group_ops); 979 TF_CIT_SETUP_DRV(discovery, NULL, NULL); 980 981 int target_fabric_setup_cits(struct target_fabric_configfs *tf) 982 { 983 target_fabric_setup_discovery_cit(tf); 984 target_fabric_setup_wwn_cit(tf); 985 target_fabric_setup_wwn_fabric_stats_cit(tf); 986 target_fabric_setup_tpg_cit(tf); 987 target_fabric_setup_tpg_base_cit(tf); 988 target_fabric_setup_tpg_port_cit(tf); 989 target_fabric_setup_tpg_port_stat_cit(tf); 990 target_fabric_setup_tpg_lun_cit(tf); 991 target_fabric_setup_tpg_np_cit(tf); 992 target_fabric_setup_tpg_np_base_cit(tf); 993 target_fabric_setup_tpg_attrib_cit(tf); 994 target_fabric_setup_tpg_auth_cit(tf); 995 target_fabric_setup_tpg_param_cit(tf); 996 target_fabric_setup_tpg_nacl_cit(tf); 997 target_fabric_setup_tpg_nacl_base_cit(tf); 998 target_fabric_setup_tpg_nacl_attrib_cit(tf); 999 target_fabric_setup_tpg_nacl_auth_cit(tf); 1000 target_fabric_setup_tpg_nacl_param_cit(tf); 1001 target_fabric_setup_tpg_nacl_stat_cit(tf); 1002 target_fabric_setup_tpg_mappedlun_cit(tf); 1003 target_fabric_setup_tpg_mappedlun_stat_cit(tf); 1004 1005 return 0; 1006 } 1007