1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 ******************************************************************************* 4 ** 5 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 6 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 7 ** 8 ** 9 ******************************************************************************* 10 ******************************************************************************/ 11 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/configfs.h> 15 #include <linux/slab.h> 16 #include <linux/in.h> 17 #include <linux/in6.h> 18 #include <linux/dlmconstants.h> 19 #include <net/ipv6.h> 20 #include <net/sock.h> 21 22 #include "config.h" 23 #include "midcomms.h" 24 #include "lowcomms.h" 25 26 /* 27 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid 28 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight 29 * /config/dlm/<cluster>/comms/<comm>/nodeid 30 * /config/dlm/<cluster>/comms/<comm>/local 31 * /config/dlm/<cluster>/comms/<comm>/addr (write only) 32 * /config/dlm/<cluster>/comms/<comm>/addr_list (read only) 33 * The <cluster> level is useless, but I haven't figured out how to avoid it. 34 */ 35 36 static struct config_group *space_list; 37 static struct config_group *comm_list; 38 static struct dlm_comm *local_comm; 39 static uint32_t dlm_comm_count; 40 41 struct dlm_clusters; 42 struct dlm_cluster; 43 struct dlm_spaces; 44 struct dlm_space; 45 struct dlm_comms; 46 struct dlm_comm; 47 struct dlm_nodes; 48 struct dlm_node; 49 50 static struct config_group *make_cluster(struct config_group *, const char *); 51 static void drop_cluster(struct config_group *, struct config_item *); 52 static void release_cluster(struct config_item *); 53 static struct config_group *make_space(struct config_group *, const char *); 54 static void drop_space(struct config_group *, struct config_item *); 55 static void release_space(struct config_item *); 56 static struct config_item *make_comm(struct config_group *, const char *); 57 static void drop_comm(struct config_group *, struct config_item *); 58 static void release_comm(struct config_item *); 59 static struct config_item *make_node(struct config_group *, const char *); 60 static void drop_node(struct config_group *, struct config_item *); 61 static void release_node(struct config_item *); 62 63 static struct configfs_attribute *comm_attrs[]; 64 static struct configfs_attribute *node_attrs[]; 65 66 struct dlm_cluster { 67 struct config_group group; 68 unsigned int cl_tcp_port; 69 unsigned int cl_buffer_size; 70 unsigned int cl_rsbtbl_size; 71 unsigned int cl_recover_timer; 72 unsigned int cl_toss_secs; 73 unsigned int cl_scan_secs; 74 unsigned int cl_log_debug; 75 unsigned int cl_log_info; 76 unsigned int cl_protocol; 77 unsigned int cl_mark; 78 #ifdef CONFIG_DLM_DEPRECATED_API 79 unsigned int cl_timewarn_cs; 80 #endif 81 unsigned int cl_new_rsb_count; 82 unsigned int cl_recover_callbacks; 83 char cl_cluster_name[DLM_LOCKSPACE_LEN]; 84 85 struct dlm_spaces *sps; 86 struct dlm_comms *cms; 87 }; 88 89 static struct dlm_cluster *config_item_to_cluster(struct config_item *i) 90 { 91 return i ? container_of(to_config_group(i), struct dlm_cluster, group) : 92 NULL; 93 } 94 95 enum { 96 CLUSTER_ATTR_TCP_PORT = 0, 97 CLUSTER_ATTR_BUFFER_SIZE, 98 CLUSTER_ATTR_RSBTBL_SIZE, 99 CLUSTER_ATTR_RECOVER_TIMER, 100 CLUSTER_ATTR_TOSS_SECS, 101 CLUSTER_ATTR_SCAN_SECS, 102 CLUSTER_ATTR_LOG_DEBUG, 103 CLUSTER_ATTR_LOG_INFO, 104 CLUSTER_ATTR_PROTOCOL, 105 CLUSTER_ATTR_MARK, 106 #ifdef CONFIG_DLM_DEPRECATED_API 107 CLUSTER_ATTR_TIMEWARN_CS, 108 #endif 109 CLUSTER_ATTR_NEW_RSB_COUNT, 110 CLUSTER_ATTR_RECOVER_CALLBACKS, 111 CLUSTER_ATTR_CLUSTER_NAME, 112 }; 113 114 static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf) 115 { 116 struct dlm_cluster *cl = config_item_to_cluster(item); 117 return sprintf(buf, "%s\n", cl->cl_cluster_name); 118 } 119 120 static ssize_t cluster_cluster_name_store(struct config_item *item, 121 const char *buf, size_t len) 122 { 123 struct dlm_cluster *cl = config_item_to_cluster(item); 124 125 strlcpy(dlm_config.ci_cluster_name, buf, 126 sizeof(dlm_config.ci_cluster_name)); 127 strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name)); 128 return len; 129 } 130 131 CONFIGFS_ATTR(cluster_, cluster_name); 132 133 static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field, 134 int *info_field, int (*check_cb)(unsigned int x), 135 const char *buf, size_t len) 136 { 137 unsigned int x; 138 int rc; 139 140 if (!capable(CAP_SYS_ADMIN)) 141 return -EPERM; 142 rc = kstrtouint(buf, 0, &x); 143 if (rc) 144 return rc; 145 146 if (check_cb) { 147 rc = check_cb(x); 148 if (rc) 149 return rc; 150 } 151 152 *cl_field = x; 153 *info_field = x; 154 155 return len; 156 } 157 158 #define CLUSTER_ATTR(name, check_cb) \ 159 static ssize_t cluster_##name##_store(struct config_item *item, \ 160 const char *buf, size_t len) \ 161 { \ 162 struct dlm_cluster *cl = config_item_to_cluster(item); \ 163 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \ 164 check_cb, buf, len); \ 165 } \ 166 static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \ 167 { \ 168 struct dlm_cluster *cl = config_item_to_cluster(item); \ 169 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ 170 } \ 171 CONFIGFS_ATTR(cluster_, name); 172 173 static int dlm_check_protocol_and_dlm_running(unsigned int x) 174 { 175 switch (x) { 176 case 0: 177 /* TCP */ 178 break; 179 case 1: 180 /* SCTP */ 181 break; 182 default: 183 return -EINVAL; 184 } 185 186 if (dlm_allow_conn) 187 return -EBUSY; 188 189 return 0; 190 } 191 192 static int dlm_check_zero_and_dlm_running(unsigned int x) 193 { 194 if (!x) 195 return -EINVAL; 196 197 if (dlm_allow_conn) 198 return -EBUSY; 199 200 return 0; 201 } 202 203 static int dlm_check_zero(unsigned int x) 204 { 205 if (!x) 206 return -EINVAL; 207 208 return 0; 209 } 210 211 static int dlm_check_buffer_size(unsigned int x) 212 { 213 if (x < DLM_MAX_SOCKET_BUFSIZE) 214 return -EINVAL; 215 216 return 0; 217 } 218 219 CLUSTER_ATTR(tcp_port, dlm_check_zero_and_dlm_running); 220 CLUSTER_ATTR(buffer_size, dlm_check_buffer_size); 221 CLUSTER_ATTR(rsbtbl_size, dlm_check_zero); 222 CLUSTER_ATTR(recover_timer, dlm_check_zero); 223 CLUSTER_ATTR(toss_secs, dlm_check_zero); 224 CLUSTER_ATTR(scan_secs, dlm_check_zero); 225 CLUSTER_ATTR(log_debug, NULL); 226 CLUSTER_ATTR(log_info, NULL); 227 CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running); 228 CLUSTER_ATTR(mark, NULL); 229 #ifdef CONFIG_DLM_DEPRECATED_API 230 CLUSTER_ATTR(timewarn_cs, dlm_check_zero); 231 #endif 232 CLUSTER_ATTR(new_rsb_count, NULL); 233 CLUSTER_ATTR(recover_callbacks, NULL); 234 235 static struct configfs_attribute *cluster_attrs[] = { 236 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, 237 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, 238 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, 239 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, 240 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, 241 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, 242 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, 243 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info, 244 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, 245 [CLUSTER_ATTR_MARK] = &cluster_attr_mark, 246 #ifdef CONFIG_DLM_DEPRECATED_API 247 [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs, 248 #endif 249 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, 250 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, 251 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, 252 NULL, 253 }; 254 255 enum { 256 COMM_ATTR_NODEID = 0, 257 COMM_ATTR_LOCAL, 258 COMM_ATTR_ADDR, 259 COMM_ATTR_ADDR_LIST, 260 COMM_ATTR_MARK, 261 }; 262 263 enum { 264 NODE_ATTR_NODEID = 0, 265 NODE_ATTR_WEIGHT, 266 }; 267 268 struct dlm_clusters { 269 struct configfs_subsystem subsys; 270 }; 271 272 struct dlm_spaces { 273 struct config_group ss_group; 274 }; 275 276 struct dlm_space { 277 struct config_group group; 278 struct list_head members; 279 struct mutex members_lock; 280 int members_count; 281 struct dlm_nodes *nds; 282 }; 283 284 struct dlm_comms { 285 struct config_group cs_group; 286 }; 287 288 struct dlm_comm { 289 struct config_item item; 290 int seq; 291 int nodeid; 292 int local; 293 int addr_count; 294 unsigned int mark; 295 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; 296 }; 297 298 struct dlm_nodes { 299 struct config_group ns_group; 300 }; 301 302 struct dlm_node { 303 struct config_item item; 304 struct list_head list; /* space->members */ 305 int nodeid; 306 int weight; 307 int new; 308 int comm_seq; /* copy of cm->seq when nd->nodeid is set */ 309 }; 310 311 static struct configfs_group_operations clusters_ops = { 312 .make_group = make_cluster, 313 .drop_item = drop_cluster, 314 }; 315 316 static struct configfs_item_operations cluster_ops = { 317 .release = release_cluster, 318 }; 319 320 static struct configfs_group_operations spaces_ops = { 321 .make_group = make_space, 322 .drop_item = drop_space, 323 }; 324 325 static struct configfs_item_operations space_ops = { 326 .release = release_space, 327 }; 328 329 static struct configfs_group_operations comms_ops = { 330 .make_item = make_comm, 331 .drop_item = drop_comm, 332 }; 333 334 static struct configfs_item_operations comm_ops = { 335 .release = release_comm, 336 }; 337 338 static struct configfs_group_operations nodes_ops = { 339 .make_item = make_node, 340 .drop_item = drop_node, 341 }; 342 343 static struct configfs_item_operations node_ops = { 344 .release = release_node, 345 }; 346 347 static const struct config_item_type clusters_type = { 348 .ct_group_ops = &clusters_ops, 349 .ct_owner = THIS_MODULE, 350 }; 351 352 static const struct config_item_type cluster_type = { 353 .ct_item_ops = &cluster_ops, 354 .ct_attrs = cluster_attrs, 355 .ct_owner = THIS_MODULE, 356 }; 357 358 static const struct config_item_type spaces_type = { 359 .ct_group_ops = &spaces_ops, 360 .ct_owner = THIS_MODULE, 361 }; 362 363 static const struct config_item_type space_type = { 364 .ct_item_ops = &space_ops, 365 .ct_owner = THIS_MODULE, 366 }; 367 368 static const struct config_item_type comms_type = { 369 .ct_group_ops = &comms_ops, 370 .ct_owner = THIS_MODULE, 371 }; 372 373 static const struct config_item_type comm_type = { 374 .ct_item_ops = &comm_ops, 375 .ct_attrs = comm_attrs, 376 .ct_owner = THIS_MODULE, 377 }; 378 379 static const struct config_item_type nodes_type = { 380 .ct_group_ops = &nodes_ops, 381 .ct_owner = THIS_MODULE, 382 }; 383 384 static const struct config_item_type node_type = { 385 .ct_item_ops = &node_ops, 386 .ct_attrs = node_attrs, 387 .ct_owner = THIS_MODULE, 388 }; 389 390 static struct dlm_space *config_item_to_space(struct config_item *i) 391 { 392 return i ? container_of(to_config_group(i), struct dlm_space, group) : 393 NULL; 394 } 395 396 static struct dlm_comm *config_item_to_comm(struct config_item *i) 397 { 398 return i ? container_of(i, struct dlm_comm, item) : NULL; 399 } 400 401 static struct dlm_node *config_item_to_node(struct config_item *i) 402 { 403 return i ? container_of(i, struct dlm_node, item) : NULL; 404 } 405 406 static struct config_group *make_cluster(struct config_group *g, 407 const char *name) 408 { 409 struct dlm_cluster *cl = NULL; 410 struct dlm_spaces *sps = NULL; 411 struct dlm_comms *cms = NULL; 412 413 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); 414 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); 415 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); 416 417 if (!cl || !sps || !cms) 418 goto fail; 419 420 cl->sps = sps; 421 cl->cms = cms; 422 423 config_group_init_type_name(&cl->group, name, &cluster_type); 424 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); 425 config_group_init_type_name(&cms->cs_group, "comms", &comms_type); 426 427 configfs_add_default_group(&sps->ss_group, &cl->group); 428 configfs_add_default_group(&cms->cs_group, &cl->group); 429 430 cl->cl_tcp_port = dlm_config.ci_tcp_port; 431 cl->cl_buffer_size = dlm_config.ci_buffer_size; 432 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; 433 cl->cl_recover_timer = dlm_config.ci_recover_timer; 434 cl->cl_toss_secs = dlm_config.ci_toss_secs; 435 cl->cl_scan_secs = dlm_config.ci_scan_secs; 436 cl->cl_log_debug = dlm_config.ci_log_debug; 437 cl->cl_log_info = dlm_config.ci_log_info; 438 cl->cl_protocol = dlm_config.ci_protocol; 439 #ifdef CONFIG_DLM_DEPRECATED_API 440 cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs; 441 #endif 442 cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; 443 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; 444 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, 445 DLM_LOCKSPACE_LEN); 446 447 space_list = &sps->ss_group; 448 comm_list = &cms->cs_group; 449 return &cl->group; 450 451 fail: 452 kfree(cl); 453 kfree(sps); 454 kfree(cms); 455 return ERR_PTR(-ENOMEM); 456 } 457 458 static void drop_cluster(struct config_group *g, struct config_item *i) 459 { 460 struct dlm_cluster *cl = config_item_to_cluster(i); 461 462 configfs_remove_default_groups(&cl->group); 463 464 space_list = NULL; 465 comm_list = NULL; 466 467 config_item_put(i); 468 } 469 470 static void release_cluster(struct config_item *i) 471 { 472 struct dlm_cluster *cl = config_item_to_cluster(i); 473 474 kfree(cl->sps); 475 kfree(cl->cms); 476 kfree(cl); 477 } 478 479 static struct config_group *make_space(struct config_group *g, const char *name) 480 { 481 struct dlm_space *sp = NULL; 482 struct dlm_nodes *nds = NULL; 483 484 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); 485 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); 486 487 if (!sp || !nds) 488 goto fail; 489 490 config_group_init_type_name(&sp->group, name, &space_type); 491 492 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); 493 configfs_add_default_group(&nds->ns_group, &sp->group); 494 495 INIT_LIST_HEAD(&sp->members); 496 mutex_init(&sp->members_lock); 497 sp->members_count = 0; 498 sp->nds = nds; 499 return &sp->group; 500 501 fail: 502 kfree(sp); 503 kfree(nds); 504 return ERR_PTR(-ENOMEM); 505 } 506 507 static void drop_space(struct config_group *g, struct config_item *i) 508 { 509 struct dlm_space *sp = config_item_to_space(i); 510 511 /* assert list_empty(&sp->members) */ 512 513 configfs_remove_default_groups(&sp->group); 514 config_item_put(i); 515 } 516 517 static void release_space(struct config_item *i) 518 { 519 struct dlm_space *sp = config_item_to_space(i); 520 kfree(sp->nds); 521 kfree(sp); 522 } 523 524 static struct config_item *make_comm(struct config_group *g, const char *name) 525 { 526 struct dlm_comm *cm; 527 528 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); 529 if (!cm) 530 return ERR_PTR(-ENOMEM); 531 532 config_item_init_type_name(&cm->item, name, &comm_type); 533 534 cm->seq = dlm_comm_count++; 535 if (!cm->seq) 536 cm->seq = dlm_comm_count++; 537 538 cm->nodeid = -1; 539 cm->local = 0; 540 cm->addr_count = 0; 541 cm->mark = 0; 542 return &cm->item; 543 } 544 545 static void drop_comm(struct config_group *g, struct config_item *i) 546 { 547 struct dlm_comm *cm = config_item_to_comm(i); 548 if (local_comm == cm) 549 local_comm = NULL; 550 dlm_midcomms_close(cm->nodeid); 551 while (cm->addr_count--) 552 kfree(cm->addr[cm->addr_count]); 553 config_item_put(i); 554 } 555 556 static void release_comm(struct config_item *i) 557 { 558 struct dlm_comm *cm = config_item_to_comm(i); 559 kfree(cm); 560 } 561 562 static struct config_item *make_node(struct config_group *g, const char *name) 563 { 564 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 565 struct dlm_node *nd; 566 567 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); 568 if (!nd) 569 return ERR_PTR(-ENOMEM); 570 571 config_item_init_type_name(&nd->item, name, &node_type); 572 nd->nodeid = -1; 573 nd->weight = 1; /* default weight of 1 if none is set */ 574 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ 575 576 mutex_lock(&sp->members_lock); 577 list_add(&nd->list, &sp->members); 578 sp->members_count++; 579 mutex_unlock(&sp->members_lock); 580 581 return &nd->item; 582 } 583 584 static void drop_node(struct config_group *g, struct config_item *i) 585 { 586 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 587 struct dlm_node *nd = config_item_to_node(i); 588 589 mutex_lock(&sp->members_lock); 590 list_del(&nd->list); 591 sp->members_count--; 592 mutex_unlock(&sp->members_lock); 593 594 config_item_put(i); 595 } 596 597 static void release_node(struct config_item *i) 598 { 599 struct dlm_node *nd = config_item_to_node(i); 600 kfree(nd); 601 } 602 603 static struct dlm_clusters clusters_root = { 604 .subsys = { 605 .su_group = { 606 .cg_item = { 607 .ci_namebuf = "dlm", 608 .ci_type = &clusters_type, 609 }, 610 }, 611 }, 612 }; 613 614 int __init dlm_config_init(void) 615 { 616 config_group_init(&clusters_root.subsys.su_group); 617 mutex_init(&clusters_root.subsys.su_mutex); 618 return configfs_register_subsystem(&clusters_root.subsys); 619 } 620 621 void dlm_config_exit(void) 622 { 623 configfs_unregister_subsystem(&clusters_root.subsys); 624 } 625 626 /* 627 * Functions for user space to read/write attributes 628 */ 629 630 static ssize_t comm_nodeid_show(struct config_item *item, char *buf) 631 { 632 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid); 633 } 634 635 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, 636 size_t len) 637 { 638 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid); 639 640 if (rc) 641 return rc; 642 return len; 643 } 644 645 static ssize_t comm_local_show(struct config_item *item, char *buf) 646 { 647 return sprintf(buf, "%d\n", config_item_to_comm(item)->local); 648 } 649 650 static ssize_t comm_local_store(struct config_item *item, const char *buf, 651 size_t len) 652 { 653 struct dlm_comm *cm = config_item_to_comm(item); 654 int rc = kstrtoint(buf, 0, &cm->local); 655 656 if (rc) 657 return rc; 658 if (cm->local && !local_comm) 659 local_comm = cm; 660 return len; 661 } 662 663 static ssize_t comm_addr_store(struct config_item *item, const char *buf, 664 size_t len) 665 { 666 struct dlm_comm *cm = config_item_to_comm(item); 667 struct sockaddr_storage *addr; 668 int rv; 669 670 if (len != sizeof(struct sockaddr_storage)) 671 return -EINVAL; 672 673 if (cm->addr_count >= DLM_MAX_ADDR_COUNT) 674 return -ENOSPC; 675 676 addr = kzalloc(sizeof(*addr), GFP_NOFS); 677 if (!addr) 678 return -ENOMEM; 679 680 memcpy(addr, buf, len); 681 682 rv = dlm_lowcomms_addr(cm->nodeid, addr, len); 683 if (rv) { 684 kfree(addr); 685 return rv; 686 } 687 688 cm->addr[cm->addr_count++] = addr; 689 return len; 690 } 691 692 static ssize_t comm_addr_list_show(struct config_item *item, char *buf) 693 { 694 struct dlm_comm *cm = config_item_to_comm(item); 695 ssize_t s; 696 ssize_t allowance; 697 int i; 698 struct sockaddr_storage *addr; 699 struct sockaddr_in *addr_in; 700 struct sockaddr_in6 *addr_in6; 701 702 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ 703 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; 704 705 706 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ 707 allowance = 4096; 708 buf[0] = '\0'; 709 710 for (i = 0; i < cm->addr_count; i++) { 711 addr = cm->addr[i]; 712 713 switch(addr->ss_family) { 714 case AF_INET: 715 addr_in = (struct sockaddr_in *)addr; 716 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); 717 break; 718 case AF_INET6: 719 addr_in6 = (struct sockaddr_in6 *)addr; 720 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); 721 break; 722 default: 723 s = sprintf(buf0, "%s\n", "<UNKNOWN>"); 724 break; 725 } 726 allowance -= s; 727 if (allowance >= 0) 728 strcat(buf, buf0); 729 else { 730 allowance += s; 731 break; 732 } 733 } 734 return 4096 - allowance; 735 } 736 737 static ssize_t comm_mark_show(struct config_item *item, char *buf) 738 { 739 return sprintf(buf, "%u\n", config_item_to_comm(item)->mark); 740 } 741 742 static ssize_t comm_mark_store(struct config_item *item, const char *buf, 743 size_t len) 744 { 745 struct dlm_comm *comm; 746 unsigned int mark; 747 int rc; 748 749 rc = kstrtouint(buf, 0, &mark); 750 if (rc) 751 return rc; 752 753 if (mark == 0) 754 mark = dlm_config.ci_mark; 755 756 comm = config_item_to_comm(item); 757 rc = dlm_lowcomms_nodes_set_mark(comm->nodeid, mark); 758 if (rc) 759 return rc; 760 761 comm->mark = mark; 762 return len; 763 } 764 765 CONFIGFS_ATTR(comm_, nodeid); 766 CONFIGFS_ATTR(comm_, local); 767 CONFIGFS_ATTR(comm_, mark); 768 CONFIGFS_ATTR_WO(comm_, addr); 769 CONFIGFS_ATTR_RO(comm_, addr_list); 770 771 static struct configfs_attribute *comm_attrs[] = { 772 [COMM_ATTR_NODEID] = &comm_attr_nodeid, 773 [COMM_ATTR_LOCAL] = &comm_attr_local, 774 [COMM_ATTR_ADDR] = &comm_attr_addr, 775 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, 776 [COMM_ATTR_MARK] = &comm_attr_mark, 777 NULL, 778 }; 779 780 static ssize_t node_nodeid_show(struct config_item *item, char *buf) 781 { 782 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid); 783 } 784 785 static ssize_t node_nodeid_store(struct config_item *item, const char *buf, 786 size_t len) 787 { 788 struct dlm_node *nd = config_item_to_node(item); 789 uint32_t seq = 0; 790 int rc = kstrtoint(buf, 0, &nd->nodeid); 791 792 if (rc) 793 return rc; 794 dlm_comm_seq(nd->nodeid, &seq); 795 nd->comm_seq = seq; 796 return len; 797 } 798 799 static ssize_t node_weight_show(struct config_item *item, char *buf) 800 { 801 return sprintf(buf, "%d\n", config_item_to_node(item)->weight); 802 } 803 804 static ssize_t node_weight_store(struct config_item *item, const char *buf, 805 size_t len) 806 { 807 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); 808 809 if (rc) 810 return rc; 811 return len; 812 } 813 814 CONFIGFS_ATTR(node_, nodeid); 815 CONFIGFS_ATTR(node_, weight); 816 817 static struct configfs_attribute *node_attrs[] = { 818 [NODE_ATTR_NODEID] = &node_attr_nodeid, 819 [NODE_ATTR_WEIGHT] = &node_attr_weight, 820 NULL, 821 }; 822 823 /* 824 * Functions for the dlm to get the info that's been configured 825 */ 826 827 static struct dlm_space *get_space(char *name) 828 { 829 struct config_item *i; 830 831 if (!space_list) 832 return NULL; 833 834 mutex_lock(&space_list->cg_subsys->su_mutex); 835 i = config_group_find_item(space_list, name); 836 mutex_unlock(&space_list->cg_subsys->su_mutex); 837 838 return config_item_to_space(i); 839 } 840 841 static void put_space(struct dlm_space *sp) 842 { 843 config_item_put(&sp->group.cg_item); 844 } 845 846 static struct dlm_comm *get_comm(int nodeid) 847 { 848 struct config_item *i; 849 struct dlm_comm *cm = NULL; 850 int found = 0; 851 852 if (!comm_list) 853 return NULL; 854 855 mutex_lock(&clusters_root.subsys.su_mutex); 856 857 list_for_each_entry(i, &comm_list->cg_children, ci_entry) { 858 cm = config_item_to_comm(i); 859 860 if (cm->nodeid != nodeid) 861 continue; 862 found = 1; 863 config_item_get(i); 864 break; 865 } 866 mutex_unlock(&clusters_root.subsys.su_mutex); 867 868 if (!found) 869 cm = NULL; 870 return cm; 871 } 872 873 static void put_comm(struct dlm_comm *cm) 874 { 875 config_item_put(&cm->item); 876 } 877 878 /* caller must free mem */ 879 int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, 880 int *count_out) 881 { 882 struct dlm_space *sp; 883 struct dlm_node *nd; 884 struct dlm_config_node *nodes, *node; 885 int rv, count; 886 887 sp = get_space(lsname); 888 if (!sp) 889 return -EEXIST; 890 891 mutex_lock(&sp->members_lock); 892 if (!sp->members_count) { 893 rv = -EINVAL; 894 printk(KERN_ERR "dlm: zero members_count\n"); 895 goto out; 896 } 897 898 count = sp->members_count; 899 900 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS); 901 if (!nodes) { 902 rv = -ENOMEM; 903 goto out; 904 } 905 906 node = nodes; 907 list_for_each_entry(nd, &sp->members, list) { 908 node->nodeid = nd->nodeid; 909 node->weight = nd->weight; 910 node->new = nd->new; 911 node->comm_seq = nd->comm_seq; 912 node++; 913 914 nd->new = 0; 915 } 916 917 *count_out = count; 918 *nodes_out = nodes; 919 rv = 0; 920 out: 921 mutex_unlock(&sp->members_lock); 922 put_space(sp); 923 return rv; 924 } 925 926 int dlm_comm_seq(int nodeid, uint32_t *seq) 927 { 928 struct dlm_comm *cm = get_comm(nodeid); 929 if (!cm) 930 return -EEXIST; 931 *seq = cm->seq; 932 put_comm(cm); 933 return 0; 934 } 935 936 int dlm_our_nodeid(void) 937 { 938 return local_comm ? local_comm->nodeid : 0; 939 } 940 941 /* num 0 is first addr, num 1 is second addr */ 942 int dlm_our_addr(struct sockaddr_storage *addr, int num) 943 { 944 if (!local_comm) 945 return -1; 946 if (num + 1 > local_comm->addr_count) 947 return -1; 948 memcpy(addr, local_comm->addr[num], sizeof(*addr)); 949 return 0; 950 } 951 952 /* Config file defaults */ 953 #define DEFAULT_TCP_PORT 21064 954 #define DEFAULT_RSBTBL_SIZE 1024 955 #define DEFAULT_RECOVER_TIMER 5 956 #define DEFAULT_TOSS_SECS 10 957 #define DEFAULT_SCAN_SECS 5 958 #define DEFAULT_LOG_DEBUG 0 959 #define DEFAULT_LOG_INFO 1 960 #define DEFAULT_PROTOCOL DLM_PROTO_TCP 961 #define DEFAULT_MARK 0 962 #ifdef CONFIG_DLM_DEPRECATED_API 963 #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */ 964 #endif 965 #define DEFAULT_NEW_RSB_COUNT 128 966 #define DEFAULT_RECOVER_CALLBACKS 0 967 #define DEFAULT_CLUSTER_NAME "" 968 969 struct dlm_config_info dlm_config = { 970 .ci_tcp_port = DEFAULT_TCP_PORT, 971 .ci_buffer_size = DLM_MAX_SOCKET_BUFSIZE, 972 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, 973 .ci_recover_timer = DEFAULT_RECOVER_TIMER, 974 .ci_toss_secs = DEFAULT_TOSS_SECS, 975 .ci_scan_secs = DEFAULT_SCAN_SECS, 976 .ci_log_debug = DEFAULT_LOG_DEBUG, 977 .ci_log_info = DEFAULT_LOG_INFO, 978 .ci_protocol = DEFAULT_PROTOCOL, 979 .ci_mark = DEFAULT_MARK, 980 #ifdef CONFIG_DLM_DEPRECATED_API 981 .ci_timewarn_cs = DEFAULT_TIMEWARN_CS, 982 #endif 983 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, 984 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, 985 .ci_cluster_name = DEFAULT_CLUSTER_NAME 986 }; 987 988