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