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