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 struct target_fabric_configfs *tf = se_nacl->se_tpg->se_tpg_wwn->wwn_tf; 342 343 if (tf->tf_ops->fabric_cleanup_nodeacl) 344 tf->tf_ops->fabric_cleanup_nodeacl(se_nacl); 345 core_tpg_del_initiator_node_acl(se_nacl); 346 } 347 348 static struct configfs_item_operations target_fabric_nacl_base_item_ops = { 349 .release = target_fabric_nacl_base_release, 350 }; 351 352 static struct configfs_group_operations target_fabric_nacl_base_group_ops = { 353 .make_group = target_fabric_make_mappedlun, 354 .drop_item = target_fabric_drop_mappedlun, 355 }; 356 357 TF_CIT_SETUP_DRV(tpg_nacl_base, &target_fabric_nacl_base_item_ops, 358 &target_fabric_nacl_base_group_ops); 359 360 /* End of tfc_tpg_nacl_base_cit */ 361 362 /* Start of tfc_node_fabric_stats_cit */ 363 /* 364 * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group 365 * to allow fabrics access to ->acl_fabric_stat_group->default_groups[] 366 */ 367 TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL); 368 369 /* End of tfc_wwn_fabric_stats_cit */ 370 371 /* Start of tfc_tpg_nacl_cit */ 372 373 static struct config_group *target_fabric_make_nodeacl( 374 struct config_group *group, 375 const char *name) 376 { 377 struct se_portal_group *se_tpg = container_of(group, 378 struct se_portal_group, tpg_acl_group); 379 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 380 struct se_node_acl *se_nacl; 381 382 se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name); 383 if (IS_ERR(se_nacl)) 384 return ERR_CAST(se_nacl); 385 386 if (tf->tf_ops->fabric_init_nodeacl) { 387 int ret = tf->tf_ops->fabric_init_nodeacl(se_nacl, name); 388 if (ret) { 389 core_tpg_del_initiator_node_acl(se_nacl); 390 return ERR_PTR(ret); 391 } 392 } 393 394 config_group_init_type_name(&se_nacl->acl_group, name, 395 &tf->tf_tpg_nacl_base_cit); 396 397 config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib", 398 &tf->tf_tpg_nacl_attrib_cit); 399 configfs_add_default_group(&se_nacl->acl_attrib_group, 400 &se_nacl->acl_group); 401 402 config_group_init_type_name(&se_nacl->acl_auth_group, "auth", 403 &tf->tf_tpg_nacl_auth_cit); 404 configfs_add_default_group(&se_nacl->acl_auth_group, 405 &se_nacl->acl_group); 406 407 config_group_init_type_name(&se_nacl->acl_param_group, "param", 408 &tf->tf_tpg_nacl_param_cit); 409 configfs_add_default_group(&se_nacl->acl_param_group, 410 &se_nacl->acl_group); 411 412 config_group_init_type_name(&se_nacl->acl_fabric_stat_group, 413 "fabric_statistics", &tf->tf_tpg_nacl_stat_cit); 414 configfs_add_default_group(&se_nacl->acl_fabric_stat_group, 415 &se_nacl->acl_group); 416 417 return &se_nacl->acl_group; 418 } 419 420 static void target_fabric_drop_nodeacl( 421 struct config_group *group, 422 struct config_item *item) 423 { 424 struct se_node_acl *se_nacl = container_of(to_config_group(item), 425 struct se_node_acl, acl_group); 426 427 configfs_remove_default_groups(&se_nacl->acl_group); 428 429 /* 430 * struct se_node_acl free is done in target_fabric_nacl_base_release() 431 */ 432 config_item_put(item); 433 } 434 435 static struct configfs_group_operations target_fabric_nacl_group_ops = { 436 .make_group = target_fabric_make_nodeacl, 437 .drop_item = target_fabric_drop_nodeacl, 438 }; 439 440 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL); 441 442 /* End of tfc_tpg_nacl_cit */ 443 444 /* Start of tfc_tpg_np_base_cit */ 445 446 static void target_fabric_np_base_release(struct config_item *item) 447 { 448 struct se_tpg_np *se_tpg_np = container_of(to_config_group(item), 449 struct se_tpg_np, tpg_np_group); 450 struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent; 451 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 452 453 tf->tf_ops->fabric_drop_np(se_tpg_np); 454 } 455 456 static struct configfs_item_operations target_fabric_np_base_item_ops = { 457 .release = target_fabric_np_base_release, 458 }; 459 460 TF_CIT_SETUP_DRV(tpg_np_base, &target_fabric_np_base_item_ops, NULL); 461 462 /* End of tfc_tpg_np_base_cit */ 463 464 /* Start of tfc_tpg_np_cit */ 465 466 static struct config_group *target_fabric_make_np( 467 struct config_group *group, 468 const char *name) 469 { 470 struct se_portal_group *se_tpg = container_of(group, 471 struct se_portal_group, tpg_np_group); 472 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 473 struct se_tpg_np *se_tpg_np; 474 475 if (!tf->tf_ops->fabric_make_np) { 476 pr_err("tf->tf_ops.fabric_make_np is NULL\n"); 477 return ERR_PTR(-ENOSYS); 478 } 479 480 se_tpg_np = tf->tf_ops->fabric_make_np(se_tpg, group, name); 481 if (!se_tpg_np || IS_ERR(se_tpg_np)) 482 return ERR_PTR(-EINVAL); 483 484 se_tpg_np->tpg_np_parent = se_tpg; 485 config_group_init_type_name(&se_tpg_np->tpg_np_group, name, 486 &tf->tf_tpg_np_base_cit); 487 488 return &se_tpg_np->tpg_np_group; 489 } 490 491 static void target_fabric_drop_np( 492 struct config_group *group, 493 struct config_item *item) 494 { 495 /* 496 * struct se_tpg_np is released via target_fabric_np_base_release() 497 */ 498 config_item_put(item); 499 } 500 501 static struct configfs_group_operations target_fabric_np_group_ops = { 502 .make_group = &target_fabric_make_np, 503 .drop_item = &target_fabric_drop_np, 504 }; 505 506 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL); 507 508 /* End of tfc_tpg_np_cit */ 509 510 /* Start of tfc_tpg_port_cit */ 511 512 static struct se_lun *item_to_lun(struct config_item *item) 513 { 514 return container_of(to_config_group(item), struct se_lun, 515 lun_group); 516 } 517 518 static ssize_t target_fabric_port_alua_tg_pt_gp_show(struct config_item *item, 519 char *page) 520 { 521 struct se_lun *lun = item_to_lun(item); 522 523 if (!lun || !lun->lun_se_dev) 524 return -ENODEV; 525 526 return core_alua_show_tg_pt_gp_info(lun, page); 527 } 528 529 static ssize_t target_fabric_port_alua_tg_pt_gp_store(struct config_item *item, 530 const char *page, size_t count) 531 { 532 struct se_lun *lun = item_to_lun(item); 533 534 if (!lun || !lun->lun_se_dev) 535 return -ENODEV; 536 537 return core_alua_store_tg_pt_gp_info(lun, page, count); 538 } 539 540 static ssize_t target_fabric_port_alua_tg_pt_offline_show( 541 struct config_item *item, char *page) 542 { 543 struct se_lun *lun = item_to_lun(item); 544 545 if (!lun || !lun->lun_se_dev) 546 return -ENODEV; 547 548 return core_alua_show_offline_bit(lun, page); 549 } 550 551 static ssize_t target_fabric_port_alua_tg_pt_offline_store( 552 struct config_item *item, const char *page, size_t count) 553 { 554 struct se_lun *lun = item_to_lun(item); 555 556 if (!lun || !lun->lun_se_dev) 557 return -ENODEV; 558 559 return core_alua_store_offline_bit(lun, page, count); 560 } 561 562 static ssize_t target_fabric_port_alua_tg_pt_status_show( 563 struct config_item *item, char *page) 564 { 565 struct se_lun *lun = item_to_lun(item); 566 567 if (!lun || !lun->lun_se_dev) 568 return -ENODEV; 569 570 return core_alua_show_secondary_status(lun, page); 571 } 572 573 static ssize_t target_fabric_port_alua_tg_pt_status_store( 574 struct config_item *item, const char *page, size_t count) 575 { 576 struct se_lun *lun = item_to_lun(item); 577 578 if (!lun || !lun->lun_se_dev) 579 return -ENODEV; 580 581 return core_alua_store_secondary_status(lun, page, count); 582 } 583 584 static ssize_t target_fabric_port_alua_tg_pt_write_md_show( 585 struct config_item *item, char *page) 586 { 587 struct se_lun *lun = item_to_lun(item); 588 589 if (!lun || !lun->lun_se_dev) 590 return -ENODEV; 591 592 return core_alua_show_secondary_write_metadata(lun, page); 593 } 594 595 static ssize_t target_fabric_port_alua_tg_pt_write_md_store( 596 struct config_item *item, const char *page, size_t count) 597 { 598 struct se_lun *lun = item_to_lun(item); 599 600 if (!lun || !lun->lun_se_dev) 601 return -ENODEV; 602 603 return core_alua_store_secondary_write_metadata(lun, page, count); 604 } 605 606 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_gp); 607 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_offline); 608 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_status); 609 CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_write_md); 610 611 static struct configfs_attribute *target_fabric_port_attrs[] = { 612 &target_fabric_port_attr_alua_tg_pt_gp, 613 &target_fabric_port_attr_alua_tg_pt_offline, 614 &target_fabric_port_attr_alua_tg_pt_status, 615 &target_fabric_port_attr_alua_tg_pt_write_md, 616 NULL, 617 }; 618 619 static int target_fabric_port_link( 620 struct config_item *lun_ci, 621 struct config_item *se_dev_ci) 622 { 623 struct config_item *tpg_ci; 624 struct se_lun *lun = container_of(to_config_group(lun_ci), 625 struct se_lun, lun_group); 626 struct se_portal_group *se_tpg; 627 struct se_device *dev = 628 container_of(to_config_group(se_dev_ci), struct se_device, dev_group); 629 struct target_fabric_configfs *tf; 630 int ret; 631 632 if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) { 633 pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:" 634 " %p to struct se_device: %p\n", se_dev_ci, dev); 635 return -EFAULT; 636 } 637 638 if (!(dev->dev_flags & DF_CONFIGURED)) { 639 pr_err("se_device not configured yet, cannot port link\n"); 640 return -ENODEV; 641 } 642 643 tpg_ci = &lun_ci->ci_parent->ci_group->cg_item; 644 se_tpg = container_of(to_config_group(tpg_ci), 645 struct se_portal_group, tpg_group); 646 tf = se_tpg->se_tpg_wwn->wwn_tf; 647 648 if (lun->lun_se_dev != NULL) { 649 pr_err("Port Symlink already exists\n"); 650 return -EEXIST; 651 } 652 653 ret = core_dev_add_lun(se_tpg, dev, lun); 654 if (ret) { 655 pr_err("core_dev_add_lun() failed: %d\n", ret); 656 goto out; 657 } 658 659 if (tf->tf_ops->fabric_post_link) { 660 /* 661 * Call the optional fabric_post_link() to allow a 662 * fabric module to setup any additional state once 663 * core_dev_add_lun() has been called.. 664 */ 665 tf->tf_ops->fabric_post_link(se_tpg, lun); 666 } 667 668 return 0; 669 out: 670 return ret; 671 } 672 673 static int target_fabric_port_unlink( 674 struct config_item *lun_ci, 675 struct config_item *se_dev_ci) 676 { 677 struct se_lun *lun = container_of(to_config_group(lun_ci), 678 struct se_lun, lun_group); 679 struct se_portal_group *se_tpg = lun->lun_tpg; 680 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 681 682 if (tf->tf_ops->fabric_pre_unlink) { 683 /* 684 * Call the optional fabric_pre_unlink() to allow a 685 * fabric module to release any additional stat before 686 * core_dev_del_lun() is called. 687 */ 688 tf->tf_ops->fabric_pre_unlink(se_tpg, lun); 689 } 690 691 core_dev_del_lun(se_tpg, lun); 692 return 0; 693 } 694 695 static void target_fabric_port_release(struct config_item *item) 696 { 697 struct se_lun *lun = container_of(to_config_group(item), 698 struct se_lun, lun_group); 699 700 kfree_rcu(lun, rcu_head); 701 } 702 703 static struct configfs_item_operations target_fabric_port_item_ops = { 704 .release = target_fabric_port_release, 705 .allow_link = target_fabric_port_link, 706 .drop_link = target_fabric_port_unlink, 707 }; 708 709 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs); 710 711 /* End of tfc_tpg_port_cit */ 712 713 /* Start of tfc_tpg_port_stat_cit */ 714 715 static struct config_group *target_core_port_stat_mkdir( 716 struct config_group *group, 717 const char *name) 718 { 719 return ERR_PTR(-ENOSYS); 720 } 721 722 static void target_core_port_stat_rmdir( 723 struct config_group *group, 724 struct config_item *item) 725 { 726 return; 727 } 728 729 static struct configfs_group_operations target_fabric_port_stat_group_ops = { 730 .make_group = target_core_port_stat_mkdir, 731 .drop_item = target_core_port_stat_rmdir, 732 }; 733 734 TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL); 735 736 /* End of tfc_tpg_port_stat_cit */ 737 738 /* Start of tfc_tpg_lun_cit */ 739 740 static struct config_group *target_fabric_make_lun( 741 struct config_group *group, 742 const char *name) 743 { 744 struct se_lun *lun; 745 struct se_portal_group *se_tpg = container_of(group, 746 struct se_portal_group, tpg_lun_group); 747 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf; 748 unsigned long long unpacked_lun; 749 int errno; 750 751 if (strstr(name, "lun_") != name) { 752 pr_err("Unable to locate \'_\" in" 753 " \"lun_$LUN_NUMBER\"\n"); 754 return ERR_PTR(-EINVAL); 755 } 756 errno = kstrtoull(name + 4, 0, &unpacked_lun); 757 if (errno) 758 return ERR_PTR(errno); 759 760 lun = core_tpg_alloc_lun(se_tpg, unpacked_lun); 761 if (IS_ERR(lun)) 762 return ERR_CAST(lun); 763 764 config_group_init_type_name(&lun->lun_group, name, 765 &tf->tf_tpg_port_cit); 766 767 config_group_init_type_name(&lun->port_stat_grps.stat_group, 768 "statistics", &tf->tf_tpg_port_stat_cit); 769 configfs_add_default_group(&lun->port_stat_grps.stat_group, 770 &lun->lun_group); 771 772 target_stat_setup_port_default_groups(lun); 773 774 return &lun->lun_group; 775 } 776 777 static void target_fabric_drop_lun( 778 struct config_group *group, 779 struct config_item *item) 780 { 781 struct se_lun *lun = container_of(to_config_group(item), 782 struct se_lun, lun_group); 783 784 configfs_remove_default_groups(&lun->port_stat_grps.stat_group); 785 configfs_remove_default_groups(&lun->lun_group); 786 787 config_item_put(item); 788 } 789 790 static struct configfs_group_operations target_fabric_lun_group_ops = { 791 .make_group = &target_fabric_make_lun, 792 .drop_item = &target_fabric_drop_lun, 793 }; 794 795 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL); 796 797 /* End of tfc_tpg_lun_cit */ 798 799 TF_CIT_SETUP_DRV(tpg_attrib, NULL, NULL); 800 TF_CIT_SETUP_DRV(tpg_auth, NULL, NULL); 801 TF_CIT_SETUP_DRV(tpg_param, NULL, NULL); 802 803 /* Start of tfc_tpg_base_cit */ 804 805 static void target_fabric_tpg_release(struct config_item *item) 806 { 807 struct se_portal_group *se_tpg = container_of(to_config_group(item), 808 struct se_portal_group, tpg_group); 809 struct se_wwn *wwn = se_tpg->se_tpg_wwn; 810 struct target_fabric_configfs *tf = wwn->wwn_tf; 811 812 tf->tf_ops->fabric_drop_tpg(se_tpg); 813 } 814 815 static struct configfs_item_operations target_fabric_tpg_base_item_ops = { 816 .release = target_fabric_tpg_release, 817 }; 818 819 TF_CIT_SETUP_DRV(tpg_base, &target_fabric_tpg_base_item_ops, NULL); 820 821 /* End of tfc_tpg_base_cit */ 822 823 /* Start of tfc_tpg_cit */ 824 825 static struct config_group *target_fabric_make_tpg( 826 struct config_group *group, 827 const char *name) 828 { 829 struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group); 830 struct target_fabric_configfs *tf = wwn->wwn_tf; 831 struct se_portal_group *se_tpg; 832 833 if (!tf->tf_ops->fabric_make_tpg) { 834 pr_err("tf->tf_ops->fabric_make_tpg is NULL\n"); 835 return ERR_PTR(-ENOSYS); 836 } 837 838 se_tpg = tf->tf_ops->fabric_make_tpg(wwn, group, name); 839 if (!se_tpg || IS_ERR(se_tpg)) 840 return ERR_PTR(-EINVAL); 841 842 config_group_init_type_name(&se_tpg->tpg_group, name, 843 &tf->tf_tpg_base_cit); 844 845 config_group_init_type_name(&se_tpg->tpg_lun_group, "lun", 846 &tf->tf_tpg_lun_cit); 847 configfs_add_default_group(&se_tpg->tpg_lun_group, 848 &se_tpg->tpg_group); 849 850 config_group_init_type_name(&se_tpg->tpg_np_group, "np", 851 &tf->tf_tpg_np_cit); 852 configfs_add_default_group(&se_tpg->tpg_np_group, 853 &se_tpg->tpg_group); 854 855 config_group_init_type_name(&se_tpg->tpg_acl_group, "acls", 856 &tf->tf_tpg_nacl_cit); 857 configfs_add_default_group(&se_tpg->tpg_acl_group, 858 &se_tpg->tpg_group); 859 860 config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib", 861 &tf->tf_tpg_attrib_cit); 862 configfs_add_default_group(&se_tpg->tpg_attrib_group, 863 &se_tpg->tpg_group); 864 865 config_group_init_type_name(&se_tpg->tpg_auth_group, "auth", 866 &tf->tf_tpg_auth_cit); 867 configfs_add_default_group(&se_tpg->tpg_auth_group, 868 &se_tpg->tpg_group); 869 870 config_group_init_type_name(&se_tpg->tpg_param_group, "param", 871 &tf->tf_tpg_param_cit); 872 configfs_add_default_group(&se_tpg->tpg_param_group, 873 &se_tpg->tpg_group); 874 875 return &se_tpg->tpg_group; 876 } 877 878 static void target_fabric_drop_tpg( 879 struct config_group *group, 880 struct config_item *item) 881 { 882 struct se_portal_group *se_tpg = container_of(to_config_group(item), 883 struct se_portal_group, tpg_group); 884 885 configfs_remove_default_groups(&se_tpg->tpg_group); 886 config_item_put(item); 887 } 888 889 static void target_fabric_release_wwn(struct config_item *item) 890 { 891 struct se_wwn *wwn = container_of(to_config_group(item), 892 struct se_wwn, wwn_group); 893 struct target_fabric_configfs *tf = wwn->wwn_tf; 894 895 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 return &wwn->wwn_group; 949 } 950 951 static void target_fabric_drop_wwn( 952 struct config_group *group, 953 struct config_item *item) 954 { 955 struct se_wwn *wwn = container_of(to_config_group(item), 956 struct se_wwn, wwn_group); 957 958 configfs_remove_default_groups(&wwn->wwn_group); 959 config_item_put(item); 960 } 961 962 static struct configfs_group_operations target_fabric_wwn_group_ops = { 963 .make_group = target_fabric_make_wwn, 964 .drop_item = target_fabric_drop_wwn, 965 }; 966 967 TF_CIT_SETUP_DRV(wwn, NULL, &target_fabric_wwn_group_ops); 968 TF_CIT_SETUP_DRV(discovery, NULL, NULL); 969 970 int target_fabric_setup_cits(struct target_fabric_configfs *tf) 971 { 972 target_fabric_setup_discovery_cit(tf); 973 target_fabric_setup_wwn_cit(tf); 974 target_fabric_setup_wwn_fabric_stats_cit(tf); 975 target_fabric_setup_tpg_cit(tf); 976 target_fabric_setup_tpg_base_cit(tf); 977 target_fabric_setup_tpg_port_cit(tf); 978 target_fabric_setup_tpg_port_stat_cit(tf); 979 target_fabric_setup_tpg_lun_cit(tf); 980 target_fabric_setup_tpg_np_cit(tf); 981 target_fabric_setup_tpg_np_base_cit(tf); 982 target_fabric_setup_tpg_attrib_cit(tf); 983 target_fabric_setup_tpg_auth_cit(tf); 984 target_fabric_setup_tpg_param_cit(tf); 985 target_fabric_setup_tpg_nacl_cit(tf); 986 target_fabric_setup_tpg_nacl_base_cit(tf); 987 target_fabric_setup_tpg_nacl_attrib_cit(tf); 988 target_fabric_setup_tpg_nacl_auth_cit(tf); 989 target_fabric_setup_tpg_nacl_param_cit(tf); 990 target_fabric_setup_tpg_nacl_stat_cit(tf); 991 target_fabric_setup_tpg_mappedlun_cit(tf); 992 target_fabric_setup_tpg_mappedlun_stat_cit(tf); 993 994 return 0; 995 } 996