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