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