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