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