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 (refers to <node>) 28 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight 29 * /config/dlm/<cluster>/comms/<comm>/nodeid (refers to <comm>) 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 const struct rhashtable_params dlm_rhash_rsb_params = { 67 .nelem_hint = 3, /* start small */ 68 .key_len = DLM_RESNAME_MAXLEN, 69 .key_offset = offsetof(struct dlm_rsb, res_name), 70 .head_offset = offsetof(struct dlm_rsb, res_node), 71 .automatic_shrinking = true, 72 }; 73 74 struct dlm_cluster { 75 struct config_group group; 76 struct dlm_spaces *sps; 77 struct dlm_comms *cms; 78 }; 79 80 static struct dlm_cluster *config_item_to_cluster(struct config_item *i) 81 { 82 return i ? container_of(to_config_group(i), struct dlm_cluster, group) : 83 NULL; 84 } 85 86 enum { 87 CLUSTER_ATTR_TCP_PORT = 0, 88 CLUSTER_ATTR_BUFFER_SIZE, 89 CLUSTER_ATTR_RSBTBL_SIZE, 90 CLUSTER_ATTR_RECOVER_TIMER, 91 CLUSTER_ATTR_TOSS_SECS, 92 CLUSTER_ATTR_SCAN_SECS, 93 CLUSTER_ATTR_LOG_DEBUG, 94 CLUSTER_ATTR_LOG_INFO, 95 CLUSTER_ATTR_PROTOCOL, 96 CLUSTER_ATTR_MARK, 97 CLUSTER_ATTR_NEW_RSB_COUNT, 98 CLUSTER_ATTR_RECOVER_CALLBACKS, 99 CLUSTER_ATTR_CLUSTER_NAME, 100 }; 101 102 static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf) 103 { 104 return sprintf(buf, "%s\n", dlm_config.ci_cluster_name); 105 } 106 107 static ssize_t cluster_cluster_name_store(struct config_item *item, 108 const char *buf, size_t len) 109 { 110 strscpy(dlm_config.ci_cluster_name, buf, 111 sizeof(dlm_config.ci_cluster_name)); 112 return len; 113 } 114 115 CONFIGFS_ATTR(cluster_, cluster_name); 116 117 static ssize_t cluster_tcp_port_show(struct config_item *item, char *buf) 118 { 119 return sprintf(buf, "%u\n", be16_to_cpu(dlm_config.ci_tcp_port)); 120 } 121 122 static int dlm_check_zero_and_dlm_running(unsigned int x) 123 { 124 if (!x) 125 return -EINVAL; 126 127 if (dlm_lowcomms_is_running()) 128 return -EBUSY; 129 130 return 0; 131 } 132 133 static ssize_t cluster_tcp_port_store(struct config_item *item, 134 const char *buf, size_t len) 135 { 136 int rc; 137 u16 x; 138 139 if (!capable(CAP_SYS_ADMIN)) 140 return -EPERM; 141 142 rc = kstrtou16(buf, 0, &x); 143 if (rc) 144 return rc; 145 146 rc = dlm_check_zero_and_dlm_running(x); 147 if (rc) 148 return rc; 149 150 dlm_config.ci_tcp_port = cpu_to_be16(x); 151 return len; 152 } 153 154 CONFIGFS_ATTR(cluster_, tcp_port); 155 156 static ssize_t cluster_set(unsigned int *info_field, 157 int (*check_cb)(unsigned int x), 158 const char *buf, size_t len) 159 { 160 unsigned int x; 161 int rc; 162 163 if (!capable(CAP_SYS_ADMIN)) 164 return -EPERM; 165 rc = kstrtouint(buf, 0, &x); 166 if (rc) 167 return rc; 168 169 if (check_cb) { 170 rc = check_cb(x); 171 if (rc) 172 return rc; 173 } 174 175 *info_field = x; 176 177 return len; 178 } 179 180 #define CLUSTER_ATTR(name, check_cb) \ 181 static ssize_t cluster_##name##_store(struct config_item *item, \ 182 const char *buf, size_t len) \ 183 { \ 184 return cluster_set(&dlm_config.ci_##name, check_cb, buf, len); \ 185 } \ 186 static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \ 187 { \ 188 return snprintf(buf, PAGE_SIZE, "%u\n", dlm_config.ci_##name); \ 189 } \ 190 CONFIGFS_ATTR(cluster_, name); 191 192 static int dlm_check_protocol_and_dlm_running(unsigned int x) 193 { 194 switch (x) { 195 case 0: 196 /* TCP */ 197 break; 198 case 1: 199 /* SCTP */ 200 break; 201 default: 202 return -EINVAL; 203 } 204 205 if (dlm_lowcomms_is_running()) 206 return -EBUSY; 207 208 return 0; 209 } 210 211 static int dlm_check_zero(unsigned int x) 212 { 213 if (!x) 214 return -EINVAL; 215 216 return 0; 217 } 218 219 static int dlm_check_buffer_size(unsigned int x) 220 { 221 if (x < DLM_MAX_SOCKET_BUFSIZE) 222 return -EINVAL; 223 224 return 0; 225 } 226 227 CLUSTER_ATTR(buffer_size, dlm_check_buffer_size); 228 CLUSTER_ATTR(rsbtbl_size, dlm_check_zero); 229 CLUSTER_ATTR(recover_timer, dlm_check_zero); 230 CLUSTER_ATTR(toss_secs, dlm_check_zero); 231 CLUSTER_ATTR(scan_secs, dlm_check_zero); 232 CLUSTER_ATTR(log_debug, NULL); 233 CLUSTER_ATTR(log_info, NULL); 234 CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running); 235 CLUSTER_ATTR(mark, NULL); 236 CLUSTER_ATTR(new_rsb_count, NULL); 237 CLUSTER_ATTR(recover_callbacks, NULL); 238 239 static struct configfs_attribute *cluster_attrs[] = { 240 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, 241 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, 242 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, 243 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, 244 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, 245 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, 246 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, 247 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info, 248 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, 249 [CLUSTER_ATTR_MARK] = &cluster_attr_mark, 250 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, 251 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, 252 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, 253 NULL, 254 }; 255 256 enum { 257 COMM_ATTR_NODEID = 0, 258 COMM_ATTR_LOCAL, 259 COMM_ATTR_ADDR, 260 COMM_ATTR_ADDR_LIST, 261 COMM_ATTR_MARK, 262 }; 263 264 enum { 265 NODE_ATTR_NODEID = 0, 266 NODE_ATTR_WEIGHT, 267 }; 268 269 struct dlm_clusters { 270 struct configfs_subsystem subsys; 271 }; 272 273 struct dlm_spaces { 274 struct config_group ss_group; 275 }; 276 277 struct dlm_space { 278 struct config_group group; 279 struct list_head members; 280 struct mutex members_lock; 281 int members_count; 282 struct dlm_nodes *nds; 283 }; 284 285 struct dlm_comms { 286 struct config_group cs_group; 287 }; 288 289 struct dlm_comm { 290 struct config_item item; 291 int seq; 292 int nodeid; 293 int local; 294 int addr_count; 295 unsigned int mark; 296 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; 297 }; 298 299 struct dlm_nodes { 300 struct config_group ns_group; 301 }; 302 303 struct dlm_node { 304 struct config_item item; 305 struct list_head list; /* space->members */ 306 int nodeid; 307 int weight; 308 int new; 309 int comm_seq; /* copy of cm->seq when nd->nodeid is set */ 310 }; 311 312 static struct configfs_group_operations clusters_ops = { 313 .make_group = make_cluster, 314 .drop_item = drop_cluster, 315 }; 316 317 static struct configfs_item_operations cluster_ops = { 318 .release = release_cluster, 319 }; 320 321 static struct configfs_group_operations spaces_ops = { 322 .make_group = make_space, 323 .drop_item = drop_space, 324 }; 325 326 static struct configfs_item_operations space_ops = { 327 .release = release_space, 328 }; 329 330 static struct configfs_group_operations comms_ops = { 331 .make_item = make_comm, 332 .drop_item = drop_comm, 333 }; 334 335 static struct configfs_item_operations comm_ops = { 336 .release = release_comm, 337 }; 338 339 static struct configfs_group_operations nodes_ops = { 340 .make_item = make_node, 341 .drop_item = drop_node, 342 }; 343 344 static struct configfs_item_operations node_ops = { 345 .release = release_node, 346 }; 347 348 static const struct config_item_type clusters_type = { 349 .ct_group_ops = &clusters_ops, 350 .ct_owner = THIS_MODULE, 351 }; 352 353 static const struct config_item_type cluster_type = { 354 .ct_item_ops = &cluster_ops, 355 .ct_attrs = cluster_attrs, 356 .ct_owner = THIS_MODULE, 357 }; 358 359 static const struct config_item_type spaces_type = { 360 .ct_group_ops = &spaces_ops, 361 .ct_owner = THIS_MODULE, 362 }; 363 364 static const struct config_item_type space_type = { 365 .ct_item_ops = &space_ops, 366 .ct_owner = THIS_MODULE, 367 }; 368 369 static const struct config_item_type comms_type = { 370 .ct_group_ops = &comms_ops, 371 .ct_owner = THIS_MODULE, 372 }; 373 374 static const struct config_item_type comm_type = { 375 .ct_item_ops = &comm_ops, 376 .ct_attrs = comm_attrs, 377 .ct_owner = THIS_MODULE, 378 }; 379 380 static const struct config_item_type nodes_type = { 381 .ct_group_ops = &nodes_ops, 382 .ct_owner = THIS_MODULE, 383 }; 384 385 static const struct config_item_type node_type = { 386 .ct_item_ops = &node_ops, 387 .ct_attrs = node_attrs, 388 .ct_owner = THIS_MODULE, 389 }; 390 391 static struct dlm_space *config_item_to_space(struct config_item *i) 392 { 393 return i ? container_of(to_config_group(i), struct dlm_space, group) : 394 NULL; 395 } 396 397 static struct dlm_comm *config_item_to_comm(struct config_item *i) 398 { 399 return i ? container_of(i, struct dlm_comm, item) : NULL; 400 } 401 402 static struct dlm_node *config_item_to_node(struct config_item *i) 403 { 404 return i ? container_of(i, struct dlm_node, item) : NULL; 405 } 406 407 static struct config_group *make_cluster(struct config_group *g, 408 const char *name) 409 { 410 struct dlm_cluster *cl = NULL; 411 struct dlm_spaces *sps = NULL; 412 struct dlm_comms *cms = NULL; 413 414 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); 415 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); 416 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); 417 418 if (!cl || !sps || !cms) 419 goto fail; 420 421 cl->sps = sps; 422 cl->cms = cms; 423 424 config_group_init_type_name(&cl->group, name, &cluster_type); 425 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); 426 config_group_init_type_name(&cms->cs_group, "comms", &comms_type); 427 428 configfs_add_default_group(&sps->ss_group, &cl->group); 429 configfs_add_default_group(&cms->cs_group, &cl->group); 430 431 space_list = &sps->ss_group; 432 comm_list = &cms->cs_group; 433 return &cl->group; 434 435 fail: 436 kfree(cl); 437 kfree(sps); 438 kfree(cms); 439 return ERR_PTR(-ENOMEM); 440 } 441 442 static void drop_cluster(struct config_group *g, struct config_item *i) 443 { 444 struct dlm_cluster *cl = config_item_to_cluster(i); 445 446 configfs_remove_default_groups(&cl->group); 447 448 space_list = NULL; 449 comm_list = NULL; 450 451 config_item_put(i); 452 } 453 454 static void release_cluster(struct config_item *i) 455 { 456 struct dlm_cluster *cl = config_item_to_cluster(i); 457 458 kfree(cl->sps); 459 kfree(cl->cms); 460 kfree(cl); 461 } 462 463 static struct config_group *make_space(struct config_group *g, const char *name) 464 { 465 struct dlm_space *sp = NULL; 466 struct dlm_nodes *nds = NULL; 467 468 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); 469 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); 470 471 if (!sp || !nds) 472 goto fail; 473 474 config_group_init_type_name(&sp->group, name, &space_type); 475 476 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); 477 configfs_add_default_group(&nds->ns_group, &sp->group); 478 479 INIT_LIST_HEAD(&sp->members); 480 mutex_init(&sp->members_lock); 481 sp->members_count = 0; 482 sp->nds = nds; 483 return &sp->group; 484 485 fail: 486 kfree(sp); 487 kfree(nds); 488 return ERR_PTR(-ENOMEM); 489 } 490 491 static void drop_space(struct config_group *g, struct config_item *i) 492 { 493 struct dlm_space *sp = config_item_to_space(i); 494 495 /* assert list_empty(&sp->members) */ 496 497 configfs_remove_default_groups(&sp->group); 498 config_item_put(i); 499 } 500 501 static void release_space(struct config_item *i) 502 { 503 struct dlm_space *sp = config_item_to_space(i); 504 kfree(sp->nds); 505 kfree(sp); 506 } 507 508 static struct config_item *make_comm(struct config_group *g, const char *name) 509 { 510 struct dlm_comm *cm; 511 unsigned int nodeid; 512 int rv; 513 514 rv = kstrtouint(name, 0, &nodeid); 515 if (rv) 516 return ERR_PTR(rv); 517 518 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); 519 if (!cm) 520 return ERR_PTR(-ENOMEM); 521 522 config_item_init_type_name(&cm->item, name, &comm_type); 523 524 cm->seq = dlm_comm_count++; 525 if (!cm->seq) 526 cm->seq = dlm_comm_count++; 527 528 cm->nodeid = nodeid; 529 cm->local = 0; 530 cm->addr_count = 0; 531 cm->mark = 0; 532 return &cm->item; 533 } 534 535 static void drop_comm(struct config_group *g, struct config_item *i) 536 { 537 struct dlm_comm *cm = config_item_to_comm(i); 538 if (local_comm == cm) 539 local_comm = NULL; 540 dlm_midcomms_close(cm->nodeid); 541 while (cm->addr_count--) 542 kfree(cm->addr[cm->addr_count]); 543 config_item_put(i); 544 } 545 546 static void release_comm(struct config_item *i) 547 { 548 struct dlm_comm *cm = config_item_to_comm(i); 549 kfree(cm); 550 } 551 552 static struct config_item *make_node(struct config_group *g, const char *name) 553 { 554 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 555 unsigned int nodeid; 556 struct dlm_node *nd; 557 uint32_t seq = 0; 558 int rv; 559 560 rv = kstrtouint(name, 0, &nodeid); 561 if (rv) 562 return ERR_PTR(rv); 563 564 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); 565 if (!nd) 566 return ERR_PTR(-ENOMEM); 567 568 config_item_init_type_name(&nd->item, name, &node_type); 569 nd->nodeid = nodeid; 570 nd->weight = 1; /* default weight of 1 if none is set */ 571 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ 572 dlm_comm_seq(nodeid, &seq, true); 573 nd->comm_seq = seq; 574 575 mutex_lock(&sp->members_lock); 576 list_add(&nd->list, &sp->members); 577 sp->members_count++; 578 mutex_unlock(&sp->members_lock); 579 580 return &nd->item; 581 } 582 583 static void drop_node(struct config_group *g, struct config_item *i) 584 { 585 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 586 struct dlm_node *nd = config_item_to_node(i); 587 588 mutex_lock(&sp->members_lock); 589 list_del(&nd->list); 590 sp->members_count--; 591 mutex_unlock(&sp->members_lock); 592 593 config_item_put(i); 594 } 595 596 static void release_node(struct config_item *i) 597 { 598 struct dlm_node *nd = config_item_to_node(i); 599 kfree(nd); 600 } 601 602 static struct dlm_clusters clusters_root = { 603 .subsys = { 604 .su_group = { 605 .cg_item = { 606 .ci_namebuf = "dlm", 607 .ci_type = &clusters_type, 608 }, 609 }, 610 }, 611 }; 612 613 int __init dlm_config_init(void) 614 { 615 config_group_init(&clusters_root.subsys.su_group); 616 mutex_init(&clusters_root.subsys.su_mutex); 617 return configfs_register_subsystem(&clusters_root.subsys); 618 } 619 620 void dlm_config_exit(void) 621 { 622 configfs_unregister_subsystem(&clusters_root.subsys); 623 } 624 625 /* 626 * Functions for user space to read/write attributes 627 */ 628 629 static ssize_t comm_nodeid_show(struct config_item *item, char *buf) 630 { 631 unsigned int nodeid; 632 int rv; 633 634 rv = kstrtouint(config_item_name(item), 0, &nodeid); 635 if (WARN_ON(rv)) 636 return rv; 637 638 return sprintf(buf, "%u\n", nodeid); 639 } 640 641 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, 642 size_t len) 643 { 644 return len; 645 } 646 647 static ssize_t comm_local_show(struct config_item *item, char *buf) 648 { 649 return sprintf(buf, "%d\n", config_item_to_comm(item)->local); 650 } 651 652 static ssize_t comm_local_store(struct config_item *item, const char *buf, 653 size_t len) 654 { 655 struct dlm_comm *cm = config_item_to_comm(item); 656 int rc = kstrtoint(buf, 0, &cm->local); 657 658 if (rc) 659 return rc; 660 if (cm->local && !local_comm) 661 local_comm = cm; 662 return len; 663 } 664 665 static ssize_t comm_addr_store(struct config_item *item, const char *buf, 666 size_t len) 667 { 668 struct dlm_comm *cm = config_item_to_comm(item); 669 struct sockaddr_storage *addr; 670 int rv; 671 672 if (len != sizeof(struct sockaddr_storage)) 673 return -EINVAL; 674 675 if (cm->addr_count >= DLM_MAX_ADDR_COUNT) 676 return -ENOSPC; 677 678 addr = kzalloc(sizeof(*addr), GFP_NOFS); 679 if (!addr) 680 return -ENOMEM; 681 682 memcpy(addr, buf, len); 683 684 rv = dlm_midcomms_addr(cm->nodeid, addr); 685 if (rv) { 686 kfree(addr); 687 return rv; 688 } 689 690 cm->addr[cm->addr_count++] = addr; 691 return len; 692 } 693 694 static ssize_t comm_addr_list_show(struct config_item *item, char *buf) 695 { 696 struct dlm_comm *cm = config_item_to_comm(item); 697 ssize_t s; 698 ssize_t allowance; 699 int i; 700 struct sockaddr_storage *addr; 701 struct sockaddr_in *addr_in; 702 struct sockaddr_in6 *addr_in6; 703 704 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ 705 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; 706 707 708 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ 709 allowance = 4096; 710 buf[0] = '\0'; 711 712 for (i = 0; i < cm->addr_count; i++) { 713 addr = cm->addr[i]; 714 715 switch(addr->ss_family) { 716 case AF_INET: 717 addr_in = (struct sockaddr_in *)addr; 718 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); 719 break; 720 case AF_INET6: 721 addr_in6 = (struct sockaddr_in6 *)addr; 722 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); 723 break; 724 default: 725 s = sprintf(buf0, "%s\n", "<UNKNOWN>"); 726 break; 727 } 728 allowance -= s; 729 if (allowance >= 0) 730 strcat(buf, buf0); 731 else { 732 allowance += s; 733 break; 734 } 735 } 736 return 4096 - allowance; 737 } 738 739 static ssize_t comm_mark_show(struct config_item *item, char *buf) 740 { 741 return sprintf(buf, "%u\n", config_item_to_comm(item)->mark); 742 } 743 744 static ssize_t comm_mark_store(struct config_item *item, const char *buf, 745 size_t len) 746 { 747 struct dlm_comm *comm; 748 unsigned int mark; 749 int rc; 750 751 rc = kstrtouint(buf, 0, &mark); 752 if (rc) 753 return rc; 754 755 if (mark == 0) 756 mark = dlm_config.ci_mark; 757 758 comm = config_item_to_comm(item); 759 rc = dlm_lowcomms_nodes_set_mark(comm->nodeid, mark); 760 if (rc) 761 return rc; 762 763 comm->mark = mark; 764 return len; 765 } 766 767 CONFIGFS_ATTR(comm_, nodeid); 768 CONFIGFS_ATTR(comm_, local); 769 CONFIGFS_ATTR(comm_, mark); 770 CONFIGFS_ATTR_WO(comm_, addr); 771 CONFIGFS_ATTR_RO(comm_, addr_list); 772 773 static struct configfs_attribute *comm_attrs[] = { 774 [COMM_ATTR_NODEID] = &comm_attr_nodeid, 775 [COMM_ATTR_LOCAL] = &comm_attr_local, 776 [COMM_ATTR_ADDR] = &comm_attr_addr, 777 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, 778 [COMM_ATTR_MARK] = &comm_attr_mark, 779 NULL, 780 }; 781 782 static ssize_t node_nodeid_show(struct config_item *item, char *buf) 783 { 784 unsigned int nodeid; 785 int rv; 786 787 rv = kstrtouint(config_item_name(item), 0, &nodeid); 788 if (WARN_ON(rv)) 789 return rv; 790 791 return sprintf(buf, "%u\n", nodeid); 792 } 793 794 static ssize_t node_nodeid_store(struct config_item *item, const char *buf, 795 size_t len) 796 { 797 return len; 798 } 799 800 static ssize_t node_weight_show(struct config_item *item, char *buf) 801 { 802 return sprintf(buf, "%d\n", config_item_to_node(item)->weight); 803 } 804 805 static ssize_t node_weight_store(struct config_item *item, const char *buf, 806 size_t len) 807 { 808 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); 809 810 if (rc) 811 return rc; 812 return len; 813 } 814 815 CONFIGFS_ATTR(node_, nodeid); 816 CONFIGFS_ATTR(node_, weight); 817 818 static struct configfs_attribute *node_attrs[] = { 819 [NODE_ATTR_NODEID] = &node_attr_nodeid, 820 [NODE_ATTR_WEIGHT] = &node_attr_weight, 821 NULL, 822 }; 823 824 /* 825 * Functions for the dlm to get the info that's been configured 826 */ 827 828 static struct dlm_space *get_space(char *name) 829 { 830 struct config_item *i; 831 832 if (!space_list) 833 return NULL; 834 835 mutex_lock(&space_list->cg_subsys->su_mutex); 836 i = config_group_find_item(space_list, name); 837 mutex_unlock(&space_list->cg_subsys->su_mutex); 838 839 return config_item_to_space(i); 840 } 841 842 static void put_space(struct dlm_space *sp) 843 { 844 config_item_put(&sp->group.cg_item); 845 } 846 847 static struct dlm_comm *get_comm(int nodeid) 848 { 849 struct config_item *i; 850 struct dlm_comm *cm = NULL; 851 int found = 0; 852 853 if (!comm_list) 854 return NULL; 855 856 WARN_ON_ONCE(!mutex_is_locked(&clusters_root.subsys.su_mutex)); 857 858 list_for_each_entry(i, &comm_list->cg_children, ci_entry) { 859 cm = config_item_to_comm(i); 860 861 if (cm->nodeid != nodeid) 862 continue; 863 found = 1; 864 config_item_get(i); 865 break; 866 } 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, bool locked) 927 { 928 struct dlm_comm *cm; 929 930 if (locked) { 931 cm = get_comm(nodeid); 932 } else { 933 mutex_lock(&clusters_root.subsys.su_mutex); 934 cm = get_comm(nodeid); 935 mutex_unlock(&clusters_root.subsys.su_mutex); 936 } 937 if (!cm) 938 return -EEXIST; 939 940 *seq = cm->seq; 941 put_comm(cm); 942 return 0; 943 } 944 945 int dlm_our_nodeid(void) 946 { 947 return local_comm->nodeid; 948 } 949 950 /* num 0 is first addr, num 1 is second addr */ 951 int dlm_our_addr(struct sockaddr_storage *addr, int num) 952 { 953 if (!local_comm) 954 return -1; 955 if (num + 1 > local_comm->addr_count) 956 return -1; 957 memcpy(addr, local_comm->addr[num], sizeof(*addr)); 958 return 0; 959 } 960 961 /* Config file defaults */ 962 #define DEFAULT_TCP_PORT 21064 963 #define DEFAULT_RSBTBL_SIZE 1024 964 #define DEFAULT_RECOVER_TIMER 5 965 #define DEFAULT_TOSS_SECS 10 966 #define DEFAULT_SCAN_SECS 5 967 #define DEFAULT_LOG_DEBUG 0 968 #define DEFAULT_LOG_INFO 1 969 #define DEFAULT_PROTOCOL DLM_PROTO_TCP 970 #define DEFAULT_MARK 0 971 #define DEFAULT_NEW_RSB_COUNT 128 972 #define DEFAULT_RECOVER_CALLBACKS 0 973 #define DEFAULT_CLUSTER_NAME "" 974 975 struct dlm_config_info dlm_config = { 976 .ci_tcp_port = cpu_to_be16(DEFAULT_TCP_PORT), 977 .ci_buffer_size = DLM_MAX_SOCKET_BUFSIZE, 978 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, 979 .ci_recover_timer = DEFAULT_RECOVER_TIMER, 980 .ci_toss_secs = DEFAULT_TOSS_SECS, 981 .ci_scan_secs = DEFAULT_SCAN_SECS, 982 .ci_log_debug = DEFAULT_LOG_DEBUG, 983 .ci_log_info = DEFAULT_LOG_INFO, 984 .ci_protocol = DEFAULT_PROTOCOL, 985 .ci_mark = DEFAULT_MARK, 986 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, 987 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, 988 .ci_cluster_name = DEFAULT_CLUSTER_NAME 989 }; 990 991