1 /****************************************************************************** 2 ******************************************************************************* 3 ** 4 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 5 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 6 ** 7 ** This copyrighted material is made available to anyone wishing to use, 8 ** modify, copy, or redistribute it subject to the terms and conditions 9 ** of the GNU General Public License v.2. 10 ** 11 ******************************************************************************* 12 ******************************************************************************/ 13 14 #include <linux/kernel.h> 15 #include <linux/init.h> 16 #include <linux/configfs.h> 17 #include <linux/slab.h> 18 #include <linux/in.h> 19 #include <linux/in6.h> 20 #include <linux/dlmconstants.h> 21 #include <net/ipv6.h> 22 #include <net/sock.h> 23 24 #include "config.h" 25 #include "lowcomms.h" 26 27 /* 28 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid 29 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight 30 * /config/dlm/<cluster>/comms/<comm>/nodeid 31 * /config/dlm/<cluster>/comms/<comm>/local 32 * /config/dlm/<cluster>/comms/<comm>/addr (write only) 33 * /config/dlm/<cluster>/comms/<comm>/addr_list (read only) 34 * The <cluster> level is useless, but I haven't figured out how to avoid it. 35 */ 36 37 static struct config_group *space_list; 38 static struct config_group *comm_list; 39 static struct dlm_comm *local_comm; 40 static uint32_t dlm_comm_count; 41 42 struct dlm_clusters; 43 struct dlm_cluster; 44 struct dlm_spaces; 45 struct dlm_space; 46 struct dlm_comms; 47 struct dlm_comm; 48 struct dlm_nodes; 49 struct dlm_node; 50 51 static struct config_group *make_cluster(struct config_group *, const char *); 52 static void drop_cluster(struct config_group *, struct config_item *); 53 static void release_cluster(struct config_item *); 54 static struct config_group *make_space(struct config_group *, const char *); 55 static void drop_space(struct config_group *, struct config_item *); 56 static void release_space(struct config_item *); 57 static struct config_item *make_comm(struct config_group *, const char *); 58 static void drop_comm(struct config_group *, struct config_item *); 59 static void release_comm(struct config_item *); 60 static struct config_item *make_node(struct config_group *, const char *); 61 static void drop_node(struct config_group *, struct config_item *); 62 static void release_node(struct config_item *); 63 64 static struct configfs_attribute *comm_attrs[]; 65 static struct configfs_attribute *node_attrs[]; 66 67 struct dlm_cluster { 68 struct config_group group; 69 unsigned int cl_tcp_port; 70 unsigned int cl_buffer_size; 71 unsigned int cl_rsbtbl_size; 72 unsigned int cl_recover_timer; 73 unsigned int cl_toss_secs; 74 unsigned int cl_scan_secs; 75 unsigned int cl_log_debug; 76 unsigned int cl_log_info; 77 unsigned int cl_protocol; 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 85 static struct dlm_cluster *config_item_to_cluster(struct config_item *i) 86 { 87 return i ? container_of(to_config_group(i), struct dlm_cluster, group) : 88 NULL; 89 } 90 91 enum { 92 CLUSTER_ATTR_TCP_PORT = 0, 93 CLUSTER_ATTR_BUFFER_SIZE, 94 CLUSTER_ATTR_RSBTBL_SIZE, 95 CLUSTER_ATTR_RECOVER_TIMER, 96 CLUSTER_ATTR_TOSS_SECS, 97 CLUSTER_ATTR_SCAN_SECS, 98 CLUSTER_ATTR_LOG_DEBUG, 99 CLUSTER_ATTR_LOG_INFO, 100 CLUSTER_ATTR_PROTOCOL, 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(timewarn_cs, 1); 174 CLUSTER_ATTR(waitwarn_us, 0); 175 CLUSTER_ATTR(new_rsb_count, 0); 176 CLUSTER_ATTR(recover_callbacks, 0); 177 178 static struct configfs_attribute *cluster_attrs[] = { 179 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, 180 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, 181 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, 182 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, 183 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, 184 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, 185 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, 186 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info, 187 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, 188 [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs, 189 [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us, 190 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, 191 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, 192 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, 193 NULL, 194 }; 195 196 enum { 197 COMM_ATTR_NODEID = 0, 198 COMM_ATTR_LOCAL, 199 COMM_ATTR_ADDR, 200 COMM_ATTR_ADDR_LIST, 201 }; 202 203 enum { 204 NODE_ATTR_NODEID = 0, 205 NODE_ATTR_WEIGHT, 206 }; 207 208 struct dlm_clusters { 209 struct configfs_subsystem subsys; 210 }; 211 212 struct dlm_spaces { 213 struct config_group ss_group; 214 }; 215 216 struct dlm_space { 217 struct config_group group; 218 struct list_head members; 219 struct mutex members_lock; 220 int members_count; 221 }; 222 223 struct dlm_comms { 224 struct config_group cs_group; 225 }; 226 227 struct dlm_comm { 228 struct config_item item; 229 int seq; 230 int nodeid; 231 int local; 232 int addr_count; 233 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; 234 }; 235 236 struct dlm_nodes { 237 struct config_group ns_group; 238 }; 239 240 struct dlm_node { 241 struct config_item item; 242 struct list_head list; /* space->members */ 243 int nodeid; 244 int weight; 245 int new; 246 int comm_seq; /* copy of cm->seq when nd->nodeid is set */ 247 }; 248 249 static struct configfs_group_operations clusters_ops = { 250 .make_group = make_cluster, 251 .drop_item = drop_cluster, 252 }; 253 254 static struct configfs_item_operations cluster_ops = { 255 .release = release_cluster, 256 }; 257 258 static struct configfs_group_operations spaces_ops = { 259 .make_group = make_space, 260 .drop_item = drop_space, 261 }; 262 263 static struct configfs_item_operations space_ops = { 264 .release = release_space, 265 }; 266 267 static struct configfs_group_operations comms_ops = { 268 .make_item = make_comm, 269 .drop_item = drop_comm, 270 }; 271 272 static struct configfs_item_operations comm_ops = { 273 .release = release_comm, 274 }; 275 276 static struct configfs_group_operations nodes_ops = { 277 .make_item = make_node, 278 .drop_item = drop_node, 279 }; 280 281 static struct configfs_item_operations node_ops = { 282 .release = release_node, 283 }; 284 285 static const struct config_item_type clusters_type = { 286 .ct_group_ops = &clusters_ops, 287 .ct_owner = THIS_MODULE, 288 }; 289 290 static const struct config_item_type cluster_type = { 291 .ct_item_ops = &cluster_ops, 292 .ct_attrs = cluster_attrs, 293 .ct_owner = THIS_MODULE, 294 }; 295 296 static const struct config_item_type spaces_type = { 297 .ct_group_ops = &spaces_ops, 298 .ct_owner = THIS_MODULE, 299 }; 300 301 static const struct config_item_type space_type = { 302 .ct_item_ops = &space_ops, 303 .ct_owner = THIS_MODULE, 304 }; 305 306 static const struct config_item_type comms_type = { 307 .ct_group_ops = &comms_ops, 308 .ct_owner = THIS_MODULE, 309 }; 310 311 static const struct config_item_type comm_type = { 312 .ct_item_ops = &comm_ops, 313 .ct_attrs = comm_attrs, 314 .ct_owner = THIS_MODULE, 315 }; 316 317 static const struct config_item_type nodes_type = { 318 .ct_group_ops = &nodes_ops, 319 .ct_owner = THIS_MODULE, 320 }; 321 322 static const struct config_item_type node_type = { 323 .ct_item_ops = &node_ops, 324 .ct_attrs = node_attrs, 325 .ct_owner = THIS_MODULE, 326 }; 327 328 static struct dlm_space *config_item_to_space(struct config_item *i) 329 { 330 return i ? container_of(to_config_group(i), struct dlm_space, group) : 331 NULL; 332 } 333 334 static struct dlm_comm *config_item_to_comm(struct config_item *i) 335 { 336 return i ? container_of(i, struct dlm_comm, item) : NULL; 337 } 338 339 static struct dlm_node *config_item_to_node(struct config_item *i) 340 { 341 return i ? container_of(i, struct dlm_node, item) : NULL; 342 } 343 344 static struct config_group *make_cluster(struct config_group *g, 345 const char *name) 346 { 347 struct dlm_cluster *cl = NULL; 348 struct dlm_spaces *sps = NULL; 349 struct dlm_comms *cms = NULL; 350 351 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); 352 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); 353 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); 354 355 if (!cl || !sps || !cms) 356 goto fail; 357 358 config_group_init_type_name(&cl->group, name, &cluster_type); 359 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); 360 config_group_init_type_name(&cms->cs_group, "comms", &comms_type); 361 362 configfs_add_default_group(&sps->ss_group, &cl->group); 363 configfs_add_default_group(&cms->cs_group, &cl->group); 364 365 cl->cl_tcp_port = dlm_config.ci_tcp_port; 366 cl->cl_buffer_size = dlm_config.ci_buffer_size; 367 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; 368 cl->cl_recover_timer = dlm_config.ci_recover_timer; 369 cl->cl_toss_secs = dlm_config.ci_toss_secs; 370 cl->cl_scan_secs = dlm_config.ci_scan_secs; 371 cl->cl_log_debug = dlm_config.ci_log_debug; 372 cl->cl_log_info = dlm_config.ci_log_info; 373 cl->cl_protocol = dlm_config.ci_protocol; 374 cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs; 375 cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us; 376 cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; 377 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; 378 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, 379 DLM_LOCKSPACE_LEN); 380 381 space_list = &sps->ss_group; 382 comm_list = &cms->cs_group; 383 return &cl->group; 384 385 fail: 386 kfree(cl); 387 kfree(sps); 388 kfree(cms); 389 return ERR_PTR(-ENOMEM); 390 } 391 392 static void drop_cluster(struct config_group *g, struct config_item *i) 393 { 394 struct dlm_cluster *cl = config_item_to_cluster(i); 395 396 configfs_remove_default_groups(&cl->group); 397 398 space_list = NULL; 399 comm_list = NULL; 400 401 config_item_put(i); 402 } 403 404 static void release_cluster(struct config_item *i) 405 { 406 struct dlm_cluster *cl = config_item_to_cluster(i); 407 kfree(cl); 408 } 409 410 static struct config_group *make_space(struct config_group *g, const char *name) 411 { 412 struct dlm_space *sp = NULL; 413 struct dlm_nodes *nds = NULL; 414 415 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); 416 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); 417 418 if (!sp || !nds) 419 goto fail; 420 421 config_group_init_type_name(&sp->group, name, &space_type); 422 423 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); 424 configfs_add_default_group(&nds->ns_group, &sp->group); 425 426 INIT_LIST_HEAD(&sp->members); 427 mutex_init(&sp->members_lock); 428 sp->members_count = 0; 429 return &sp->group; 430 431 fail: 432 kfree(sp); 433 kfree(nds); 434 return ERR_PTR(-ENOMEM); 435 } 436 437 static void drop_space(struct config_group *g, struct config_item *i) 438 { 439 struct dlm_space *sp = config_item_to_space(i); 440 441 /* assert list_empty(&sp->members) */ 442 443 configfs_remove_default_groups(&sp->group); 444 config_item_put(i); 445 } 446 447 static void release_space(struct config_item *i) 448 { 449 struct dlm_space *sp = config_item_to_space(i); 450 kfree(sp); 451 } 452 453 static struct config_item *make_comm(struct config_group *g, const char *name) 454 { 455 struct dlm_comm *cm; 456 457 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); 458 if (!cm) 459 return ERR_PTR(-ENOMEM); 460 461 config_item_init_type_name(&cm->item, name, &comm_type); 462 463 cm->seq = dlm_comm_count++; 464 if (!cm->seq) 465 cm->seq = dlm_comm_count++; 466 467 cm->nodeid = -1; 468 cm->local = 0; 469 cm->addr_count = 0; 470 return &cm->item; 471 } 472 473 static void drop_comm(struct config_group *g, struct config_item *i) 474 { 475 struct dlm_comm *cm = config_item_to_comm(i); 476 if (local_comm == cm) 477 local_comm = NULL; 478 dlm_lowcomms_close(cm->nodeid); 479 while (cm->addr_count--) 480 kfree(cm->addr[cm->addr_count]); 481 config_item_put(i); 482 } 483 484 static void release_comm(struct config_item *i) 485 { 486 struct dlm_comm *cm = config_item_to_comm(i); 487 kfree(cm); 488 } 489 490 static struct config_item *make_node(struct config_group *g, const char *name) 491 { 492 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 493 struct dlm_node *nd; 494 495 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); 496 if (!nd) 497 return ERR_PTR(-ENOMEM); 498 499 config_item_init_type_name(&nd->item, name, &node_type); 500 nd->nodeid = -1; 501 nd->weight = 1; /* default weight of 1 if none is set */ 502 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ 503 504 mutex_lock(&sp->members_lock); 505 list_add(&nd->list, &sp->members); 506 sp->members_count++; 507 mutex_unlock(&sp->members_lock); 508 509 return &nd->item; 510 } 511 512 static void drop_node(struct config_group *g, struct config_item *i) 513 { 514 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 515 struct dlm_node *nd = config_item_to_node(i); 516 517 mutex_lock(&sp->members_lock); 518 list_del(&nd->list); 519 sp->members_count--; 520 mutex_unlock(&sp->members_lock); 521 522 config_item_put(i); 523 } 524 525 static void release_node(struct config_item *i) 526 { 527 struct dlm_node *nd = config_item_to_node(i); 528 kfree(nd); 529 } 530 531 static struct dlm_clusters clusters_root = { 532 .subsys = { 533 .su_group = { 534 .cg_item = { 535 .ci_namebuf = "dlm", 536 .ci_type = &clusters_type, 537 }, 538 }, 539 }, 540 }; 541 542 int __init dlm_config_init(void) 543 { 544 config_group_init(&clusters_root.subsys.su_group); 545 mutex_init(&clusters_root.subsys.su_mutex); 546 return configfs_register_subsystem(&clusters_root.subsys); 547 } 548 549 void dlm_config_exit(void) 550 { 551 configfs_unregister_subsystem(&clusters_root.subsys); 552 } 553 554 /* 555 * Functions for user space to read/write attributes 556 */ 557 558 static ssize_t comm_nodeid_show(struct config_item *item, char *buf) 559 { 560 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid); 561 } 562 563 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, 564 size_t len) 565 { 566 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid); 567 568 if (rc) 569 return rc; 570 return len; 571 } 572 573 static ssize_t comm_local_show(struct config_item *item, char *buf) 574 { 575 return sprintf(buf, "%d\n", config_item_to_comm(item)->local); 576 } 577 578 static ssize_t comm_local_store(struct config_item *item, const char *buf, 579 size_t len) 580 { 581 struct dlm_comm *cm = config_item_to_comm(item); 582 int rc = kstrtoint(buf, 0, &cm->local); 583 584 if (rc) 585 return rc; 586 if (cm->local && !local_comm) 587 local_comm = cm; 588 return len; 589 } 590 591 static ssize_t comm_addr_store(struct config_item *item, const char *buf, 592 size_t len) 593 { 594 struct dlm_comm *cm = config_item_to_comm(item); 595 struct sockaddr_storage *addr; 596 int rv; 597 598 if (len != sizeof(struct sockaddr_storage)) 599 return -EINVAL; 600 601 if (cm->addr_count >= DLM_MAX_ADDR_COUNT) 602 return -ENOSPC; 603 604 addr = kzalloc(sizeof(*addr), GFP_NOFS); 605 if (!addr) 606 return -ENOMEM; 607 608 memcpy(addr, buf, len); 609 610 rv = dlm_lowcomms_addr(cm->nodeid, addr, len); 611 if (rv) { 612 kfree(addr); 613 return rv; 614 } 615 616 cm->addr[cm->addr_count++] = addr; 617 return len; 618 } 619 620 static ssize_t comm_addr_list_show(struct config_item *item, char *buf) 621 { 622 struct dlm_comm *cm = config_item_to_comm(item); 623 ssize_t s; 624 ssize_t allowance; 625 int i; 626 struct sockaddr_storage *addr; 627 struct sockaddr_in *addr_in; 628 struct sockaddr_in6 *addr_in6; 629 630 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ 631 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; 632 633 634 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ 635 allowance = 4096; 636 buf[0] = '\0'; 637 638 for (i = 0; i < cm->addr_count; i++) { 639 addr = cm->addr[i]; 640 641 switch(addr->ss_family) { 642 case AF_INET: 643 addr_in = (struct sockaddr_in *)addr; 644 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); 645 break; 646 case AF_INET6: 647 addr_in6 = (struct sockaddr_in6 *)addr; 648 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); 649 break; 650 default: 651 s = sprintf(buf0, "%s\n", "<UNKNOWN>"); 652 break; 653 } 654 allowance -= s; 655 if (allowance >= 0) 656 strcat(buf, buf0); 657 else { 658 allowance += s; 659 break; 660 } 661 } 662 return 4096 - allowance; 663 } 664 665 CONFIGFS_ATTR(comm_, nodeid); 666 CONFIGFS_ATTR(comm_, local); 667 CONFIGFS_ATTR_WO(comm_, addr); 668 CONFIGFS_ATTR_RO(comm_, addr_list); 669 670 static struct configfs_attribute *comm_attrs[] = { 671 [COMM_ATTR_NODEID] = &comm_attr_nodeid, 672 [COMM_ATTR_LOCAL] = &comm_attr_local, 673 [COMM_ATTR_ADDR] = &comm_attr_addr, 674 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, 675 NULL, 676 }; 677 678 static ssize_t node_nodeid_show(struct config_item *item, char *buf) 679 { 680 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid); 681 } 682 683 static ssize_t node_nodeid_store(struct config_item *item, const char *buf, 684 size_t len) 685 { 686 struct dlm_node *nd = config_item_to_node(item); 687 uint32_t seq = 0; 688 int rc = kstrtoint(buf, 0, &nd->nodeid); 689 690 if (rc) 691 return rc; 692 dlm_comm_seq(nd->nodeid, &seq); 693 nd->comm_seq = seq; 694 return len; 695 } 696 697 static ssize_t node_weight_show(struct config_item *item, char *buf) 698 { 699 return sprintf(buf, "%d\n", config_item_to_node(item)->weight); 700 } 701 702 static ssize_t node_weight_store(struct config_item *item, const char *buf, 703 size_t len) 704 { 705 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); 706 707 if (rc) 708 return rc; 709 return len; 710 } 711 712 CONFIGFS_ATTR(node_, nodeid); 713 CONFIGFS_ATTR(node_, weight); 714 715 static struct configfs_attribute *node_attrs[] = { 716 [NODE_ATTR_NODEID] = &node_attr_nodeid, 717 [NODE_ATTR_WEIGHT] = &node_attr_weight, 718 NULL, 719 }; 720 721 /* 722 * Functions for the dlm to get the info that's been configured 723 */ 724 725 static struct dlm_space *get_space(char *name) 726 { 727 struct config_item *i; 728 729 if (!space_list) 730 return NULL; 731 732 mutex_lock(&space_list->cg_subsys->su_mutex); 733 i = config_group_find_item(space_list, name); 734 mutex_unlock(&space_list->cg_subsys->su_mutex); 735 736 return config_item_to_space(i); 737 } 738 739 static void put_space(struct dlm_space *sp) 740 { 741 config_item_put(&sp->group.cg_item); 742 } 743 744 static struct dlm_comm *get_comm(int nodeid) 745 { 746 struct config_item *i; 747 struct dlm_comm *cm = NULL; 748 int found = 0; 749 750 if (!comm_list) 751 return NULL; 752 753 mutex_lock(&clusters_root.subsys.su_mutex); 754 755 list_for_each_entry(i, &comm_list->cg_children, ci_entry) { 756 cm = config_item_to_comm(i); 757 758 if (cm->nodeid != nodeid) 759 continue; 760 found = 1; 761 config_item_get(i); 762 break; 763 } 764 mutex_unlock(&clusters_root.subsys.su_mutex); 765 766 if (!found) 767 cm = NULL; 768 return cm; 769 } 770 771 static void put_comm(struct dlm_comm *cm) 772 { 773 config_item_put(&cm->item); 774 } 775 776 /* caller must free mem */ 777 int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, 778 int *count_out) 779 { 780 struct dlm_space *sp; 781 struct dlm_node *nd; 782 struct dlm_config_node *nodes, *node; 783 int rv, count; 784 785 sp = get_space(lsname); 786 if (!sp) 787 return -EEXIST; 788 789 mutex_lock(&sp->members_lock); 790 if (!sp->members_count) { 791 rv = -EINVAL; 792 printk(KERN_ERR "dlm: zero members_count\n"); 793 goto out; 794 } 795 796 count = sp->members_count; 797 798 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS); 799 if (!nodes) { 800 rv = -ENOMEM; 801 goto out; 802 } 803 804 node = nodes; 805 list_for_each_entry(nd, &sp->members, list) { 806 node->nodeid = nd->nodeid; 807 node->weight = nd->weight; 808 node->new = nd->new; 809 node->comm_seq = nd->comm_seq; 810 node++; 811 812 nd->new = 0; 813 } 814 815 *count_out = count; 816 *nodes_out = nodes; 817 rv = 0; 818 out: 819 mutex_unlock(&sp->members_lock); 820 put_space(sp); 821 return rv; 822 } 823 824 int dlm_comm_seq(int nodeid, uint32_t *seq) 825 { 826 struct dlm_comm *cm = get_comm(nodeid); 827 if (!cm) 828 return -EEXIST; 829 *seq = cm->seq; 830 put_comm(cm); 831 return 0; 832 } 833 834 int dlm_our_nodeid(void) 835 { 836 return local_comm ? local_comm->nodeid : 0; 837 } 838 839 /* num 0 is first addr, num 1 is second addr */ 840 int dlm_our_addr(struct sockaddr_storage *addr, int num) 841 { 842 if (!local_comm) 843 return -1; 844 if (num + 1 > local_comm->addr_count) 845 return -1; 846 memcpy(addr, local_comm->addr[num], sizeof(*addr)); 847 return 0; 848 } 849 850 /* Config file defaults */ 851 #define DEFAULT_TCP_PORT 21064 852 #define DEFAULT_BUFFER_SIZE 4096 853 #define DEFAULT_RSBTBL_SIZE 1024 854 #define DEFAULT_RECOVER_TIMER 5 855 #define DEFAULT_TOSS_SECS 10 856 #define DEFAULT_SCAN_SECS 5 857 #define DEFAULT_LOG_DEBUG 0 858 #define DEFAULT_LOG_INFO 1 859 #define DEFAULT_PROTOCOL 0 860 #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */ 861 #define DEFAULT_WAITWARN_US 0 862 #define DEFAULT_NEW_RSB_COUNT 128 863 #define DEFAULT_RECOVER_CALLBACKS 0 864 #define DEFAULT_CLUSTER_NAME "" 865 866 struct dlm_config_info dlm_config = { 867 .ci_tcp_port = DEFAULT_TCP_PORT, 868 .ci_buffer_size = DEFAULT_BUFFER_SIZE, 869 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, 870 .ci_recover_timer = DEFAULT_RECOVER_TIMER, 871 .ci_toss_secs = DEFAULT_TOSS_SECS, 872 .ci_scan_secs = DEFAULT_SCAN_SECS, 873 .ci_log_debug = DEFAULT_LOG_DEBUG, 874 .ci_log_info = DEFAULT_LOG_INFO, 875 .ci_protocol = DEFAULT_PROTOCOL, 876 .ci_timewarn_cs = DEFAULT_TIMEWARN_CS, 877 .ci_waitwarn_us = DEFAULT_WAITWARN_US, 878 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, 879 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, 880 .ci_cluster_name = DEFAULT_CLUSTER_NAME 881 }; 882 883