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/module.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_protocol; 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_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(protocol, 0); 170 CLUSTER_ATTR(timewarn_cs, 1); 171 CLUSTER_ATTR(waitwarn_us, 0); 172 CLUSTER_ATTR(new_rsb_count, 0); 173 CLUSTER_ATTR(recover_callbacks, 0); 174 175 static struct configfs_attribute *cluster_attrs[] = { 176 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, 177 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, 178 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, 179 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, 180 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, 181 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, 182 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, 183 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, 184 [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs, 185 [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us, 186 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, 187 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, 188 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, 189 NULL, 190 }; 191 192 enum { 193 COMM_ATTR_NODEID = 0, 194 COMM_ATTR_LOCAL, 195 COMM_ATTR_ADDR, 196 COMM_ATTR_ADDR_LIST, 197 }; 198 199 enum { 200 NODE_ATTR_NODEID = 0, 201 NODE_ATTR_WEIGHT, 202 }; 203 204 struct dlm_clusters { 205 struct configfs_subsystem subsys; 206 }; 207 208 struct dlm_spaces { 209 struct config_group ss_group; 210 }; 211 212 struct dlm_space { 213 struct config_group group; 214 struct list_head members; 215 struct mutex members_lock; 216 int members_count; 217 }; 218 219 struct dlm_comms { 220 struct config_group cs_group; 221 }; 222 223 struct dlm_comm { 224 struct config_item item; 225 int seq; 226 int nodeid; 227 int local; 228 int addr_count; 229 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; 230 }; 231 232 struct dlm_nodes { 233 struct config_group ns_group; 234 }; 235 236 struct dlm_node { 237 struct config_item item; 238 struct list_head list; /* space->members */ 239 int nodeid; 240 int weight; 241 int new; 242 int comm_seq; /* copy of cm->seq when nd->nodeid is set */ 243 }; 244 245 static struct configfs_group_operations clusters_ops = { 246 .make_group = make_cluster, 247 .drop_item = drop_cluster, 248 }; 249 250 static struct configfs_item_operations cluster_ops = { 251 .release = release_cluster, 252 }; 253 254 static struct configfs_group_operations spaces_ops = { 255 .make_group = make_space, 256 .drop_item = drop_space, 257 }; 258 259 static struct configfs_item_operations space_ops = { 260 .release = release_space, 261 }; 262 263 static struct configfs_group_operations comms_ops = { 264 .make_item = make_comm, 265 .drop_item = drop_comm, 266 }; 267 268 static struct configfs_item_operations comm_ops = { 269 .release = release_comm, 270 }; 271 272 static struct configfs_group_operations nodes_ops = { 273 .make_item = make_node, 274 .drop_item = drop_node, 275 }; 276 277 static struct configfs_item_operations node_ops = { 278 .release = release_node, 279 }; 280 281 static struct config_item_type clusters_type = { 282 .ct_group_ops = &clusters_ops, 283 .ct_owner = THIS_MODULE, 284 }; 285 286 static struct config_item_type cluster_type = { 287 .ct_item_ops = &cluster_ops, 288 .ct_attrs = cluster_attrs, 289 .ct_owner = THIS_MODULE, 290 }; 291 292 static struct config_item_type spaces_type = { 293 .ct_group_ops = &spaces_ops, 294 .ct_owner = THIS_MODULE, 295 }; 296 297 static struct config_item_type space_type = { 298 .ct_item_ops = &space_ops, 299 .ct_owner = THIS_MODULE, 300 }; 301 302 static struct config_item_type comms_type = { 303 .ct_group_ops = &comms_ops, 304 .ct_owner = THIS_MODULE, 305 }; 306 307 static struct config_item_type comm_type = { 308 .ct_item_ops = &comm_ops, 309 .ct_attrs = comm_attrs, 310 .ct_owner = THIS_MODULE, 311 }; 312 313 static struct config_item_type nodes_type = { 314 .ct_group_ops = &nodes_ops, 315 .ct_owner = THIS_MODULE, 316 }; 317 318 static struct config_item_type node_type = { 319 .ct_item_ops = &node_ops, 320 .ct_attrs = node_attrs, 321 .ct_owner = THIS_MODULE, 322 }; 323 324 static struct dlm_space *config_item_to_space(struct config_item *i) 325 { 326 return i ? container_of(to_config_group(i), struct dlm_space, group) : 327 NULL; 328 } 329 330 static struct dlm_comm *config_item_to_comm(struct config_item *i) 331 { 332 return i ? container_of(i, struct dlm_comm, item) : NULL; 333 } 334 335 static struct dlm_node *config_item_to_node(struct config_item *i) 336 { 337 return i ? container_of(i, struct dlm_node, item) : NULL; 338 } 339 340 static struct config_group *make_cluster(struct config_group *g, 341 const char *name) 342 { 343 struct dlm_cluster *cl = NULL; 344 struct dlm_spaces *sps = NULL; 345 struct dlm_comms *cms = NULL; 346 void *gps = NULL; 347 348 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); 349 gps = kcalloc(3, sizeof(struct config_group *), GFP_NOFS); 350 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); 351 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); 352 353 if (!cl || !gps || !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 cl->group.default_groups = gps; 361 cl->group.default_groups[0] = &sps->ss_group; 362 cl->group.default_groups[1] = &cms->cs_group; 363 cl->group.default_groups[2] = NULL; 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_protocol = dlm_config.ci_protocol; 373 cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs; 374 cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us; 375 cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; 376 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; 377 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, 378 DLM_LOCKSPACE_LEN); 379 380 space_list = &sps->ss_group; 381 comm_list = &cms->cs_group; 382 return &cl->group; 383 384 fail: 385 kfree(cl); 386 kfree(gps); 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 struct config_item *tmp; 396 int j; 397 398 for (j = 0; cl->group.default_groups[j]; j++) { 399 tmp = &cl->group.default_groups[j]->cg_item; 400 cl->group.default_groups[j] = NULL; 401 config_item_put(tmp); 402 } 403 404 space_list = NULL; 405 comm_list = NULL; 406 407 config_item_put(i); 408 } 409 410 static void release_cluster(struct config_item *i) 411 { 412 struct dlm_cluster *cl = config_item_to_cluster(i); 413 kfree(cl->group.default_groups); 414 kfree(cl); 415 } 416 417 static struct config_group *make_space(struct config_group *g, const char *name) 418 { 419 struct dlm_space *sp = NULL; 420 struct dlm_nodes *nds = NULL; 421 void *gps = NULL; 422 423 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); 424 gps = kcalloc(2, sizeof(struct config_group *), GFP_NOFS); 425 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); 426 427 if (!sp || !gps || !nds) 428 goto fail; 429 430 config_group_init_type_name(&sp->group, name, &space_type); 431 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); 432 433 sp->group.default_groups = gps; 434 sp->group.default_groups[0] = &nds->ns_group; 435 sp->group.default_groups[1] = NULL; 436 437 INIT_LIST_HEAD(&sp->members); 438 mutex_init(&sp->members_lock); 439 sp->members_count = 0; 440 return &sp->group; 441 442 fail: 443 kfree(sp); 444 kfree(gps); 445 kfree(nds); 446 return ERR_PTR(-ENOMEM); 447 } 448 449 static void drop_space(struct config_group *g, struct config_item *i) 450 { 451 struct dlm_space *sp = config_item_to_space(i); 452 struct config_item *tmp; 453 int j; 454 455 /* assert list_empty(&sp->members) */ 456 457 for (j = 0; sp->group.default_groups[j]; j++) { 458 tmp = &sp->group.default_groups[j]->cg_item; 459 sp->group.default_groups[j] = NULL; 460 config_item_put(tmp); 461 } 462 463 config_item_put(i); 464 } 465 466 static void release_space(struct config_item *i) 467 { 468 struct dlm_space *sp = config_item_to_space(i); 469 kfree(sp->group.default_groups); 470 kfree(sp); 471 } 472 473 static struct config_item *make_comm(struct config_group *g, const char *name) 474 { 475 struct dlm_comm *cm; 476 477 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); 478 if (!cm) 479 return ERR_PTR(-ENOMEM); 480 481 config_item_init_type_name(&cm->item, name, &comm_type); 482 483 cm->seq = dlm_comm_count++; 484 if (!cm->seq) 485 cm->seq = dlm_comm_count++; 486 487 cm->nodeid = -1; 488 cm->local = 0; 489 cm->addr_count = 0; 490 return &cm->item; 491 } 492 493 static void drop_comm(struct config_group *g, struct config_item *i) 494 { 495 struct dlm_comm *cm = config_item_to_comm(i); 496 if (local_comm == cm) 497 local_comm = NULL; 498 dlm_lowcomms_close(cm->nodeid); 499 while (cm->addr_count--) 500 kfree(cm->addr[cm->addr_count]); 501 config_item_put(i); 502 } 503 504 static void release_comm(struct config_item *i) 505 { 506 struct dlm_comm *cm = config_item_to_comm(i); 507 kfree(cm); 508 } 509 510 static struct config_item *make_node(struct config_group *g, const char *name) 511 { 512 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 513 struct dlm_node *nd; 514 515 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); 516 if (!nd) 517 return ERR_PTR(-ENOMEM); 518 519 config_item_init_type_name(&nd->item, name, &node_type); 520 nd->nodeid = -1; 521 nd->weight = 1; /* default weight of 1 if none is set */ 522 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ 523 524 mutex_lock(&sp->members_lock); 525 list_add(&nd->list, &sp->members); 526 sp->members_count++; 527 mutex_unlock(&sp->members_lock); 528 529 return &nd->item; 530 } 531 532 static void drop_node(struct config_group *g, struct config_item *i) 533 { 534 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 535 struct dlm_node *nd = config_item_to_node(i); 536 537 mutex_lock(&sp->members_lock); 538 list_del(&nd->list); 539 sp->members_count--; 540 mutex_unlock(&sp->members_lock); 541 542 config_item_put(i); 543 } 544 545 static void release_node(struct config_item *i) 546 { 547 struct dlm_node *nd = config_item_to_node(i); 548 kfree(nd); 549 } 550 551 static struct dlm_clusters clusters_root = { 552 .subsys = { 553 .su_group = { 554 .cg_item = { 555 .ci_namebuf = "dlm", 556 .ci_type = &clusters_type, 557 }, 558 }, 559 }, 560 }; 561 562 int __init dlm_config_init(void) 563 { 564 config_group_init(&clusters_root.subsys.su_group); 565 mutex_init(&clusters_root.subsys.su_mutex); 566 return configfs_register_subsystem(&clusters_root.subsys); 567 } 568 569 void dlm_config_exit(void) 570 { 571 configfs_unregister_subsystem(&clusters_root.subsys); 572 } 573 574 /* 575 * Functions for user space to read/write attributes 576 */ 577 578 static ssize_t comm_nodeid_show(struct config_item *item, char *buf) 579 { 580 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid); 581 } 582 583 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, 584 size_t len) 585 { 586 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid); 587 588 if (rc) 589 return rc; 590 return len; 591 } 592 593 static ssize_t comm_local_show(struct config_item *item, char *buf) 594 { 595 return sprintf(buf, "%d\n", config_item_to_comm(item)->local); 596 } 597 598 static ssize_t comm_local_store(struct config_item *item, const char *buf, 599 size_t len) 600 { 601 struct dlm_comm *cm = config_item_to_comm(item); 602 int rc = kstrtoint(buf, 0, &cm->local); 603 604 if (rc) 605 return rc; 606 if (cm->local && !local_comm) 607 local_comm = cm; 608 return len; 609 } 610 611 static ssize_t comm_addr_store(struct config_item *item, const char *buf, 612 size_t len) 613 { 614 struct dlm_comm *cm = config_item_to_comm(item); 615 struct sockaddr_storage *addr; 616 int rv; 617 618 if (len != sizeof(struct sockaddr_storage)) 619 return -EINVAL; 620 621 if (cm->addr_count >= DLM_MAX_ADDR_COUNT) 622 return -ENOSPC; 623 624 addr = kzalloc(sizeof(*addr), GFP_NOFS); 625 if (!addr) 626 return -ENOMEM; 627 628 memcpy(addr, buf, len); 629 630 rv = dlm_lowcomms_addr(cm->nodeid, addr, len); 631 if (rv) { 632 kfree(addr); 633 return rv; 634 } 635 636 cm->addr[cm->addr_count++] = addr; 637 return len; 638 } 639 640 static ssize_t comm_addr_list_show(struct config_item *item, char *buf) 641 { 642 struct dlm_comm *cm = config_item_to_comm(item); 643 ssize_t s; 644 ssize_t allowance; 645 int i; 646 struct sockaddr_storage *addr; 647 struct sockaddr_in *addr_in; 648 struct sockaddr_in6 *addr_in6; 649 650 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ 651 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; 652 653 654 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ 655 allowance = 4096; 656 buf[0] = '\0'; 657 658 for (i = 0; i < cm->addr_count; i++) { 659 addr = cm->addr[i]; 660 661 switch(addr->ss_family) { 662 case AF_INET: 663 addr_in = (struct sockaddr_in *)addr; 664 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); 665 break; 666 case AF_INET6: 667 addr_in6 = (struct sockaddr_in6 *)addr; 668 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); 669 break; 670 default: 671 s = sprintf(buf0, "%s\n", "<UNKNOWN>"); 672 break; 673 } 674 allowance -= s; 675 if (allowance >= 0) 676 strcat(buf, buf0); 677 else { 678 allowance += s; 679 break; 680 } 681 } 682 return 4096 - allowance; 683 } 684 685 CONFIGFS_ATTR(comm_, nodeid); 686 CONFIGFS_ATTR(comm_, local); 687 CONFIGFS_ATTR_WO(comm_, addr); 688 CONFIGFS_ATTR_RO(comm_, addr_list); 689 690 static struct configfs_attribute *comm_attrs[] = { 691 [COMM_ATTR_NODEID] = &comm_attr_nodeid, 692 [COMM_ATTR_LOCAL] = &comm_attr_local, 693 [COMM_ATTR_ADDR] = &comm_attr_addr, 694 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, 695 NULL, 696 }; 697 698 static ssize_t node_nodeid_show(struct config_item *item, char *buf) 699 { 700 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid); 701 } 702 703 static ssize_t node_nodeid_store(struct config_item *item, const char *buf, 704 size_t len) 705 { 706 struct dlm_node *nd = config_item_to_node(item); 707 uint32_t seq = 0; 708 int rc = kstrtoint(buf, 0, &nd->nodeid); 709 710 if (rc) 711 return rc; 712 dlm_comm_seq(nd->nodeid, &seq); 713 nd->comm_seq = seq; 714 return len; 715 } 716 717 static ssize_t node_weight_show(struct config_item *item, char *buf) 718 { 719 return sprintf(buf, "%d\n", config_item_to_node(item)->weight); 720 } 721 722 static ssize_t node_weight_store(struct config_item *item, const char *buf, 723 size_t len) 724 { 725 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); 726 727 if (rc) 728 return rc; 729 return len; 730 } 731 732 CONFIGFS_ATTR(node_, nodeid); 733 CONFIGFS_ATTR(node_, weight); 734 735 static struct configfs_attribute *node_attrs[] = { 736 [NODE_ATTR_NODEID] = &node_attr_nodeid, 737 [NODE_ATTR_WEIGHT] = &node_attr_weight, 738 NULL, 739 }; 740 741 /* 742 * Functions for the dlm to get the info that's been configured 743 */ 744 745 static struct dlm_space *get_space(char *name) 746 { 747 struct config_item *i; 748 749 if (!space_list) 750 return NULL; 751 752 mutex_lock(&space_list->cg_subsys->su_mutex); 753 i = config_group_find_item(space_list, name); 754 mutex_unlock(&space_list->cg_subsys->su_mutex); 755 756 return config_item_to_space(i); 757 } 758 759 static void put_space(struct dlm_space *sp) 760 { 761 config_item_put(&sp->group.cg_item); 762 } 763 764 static struct dlm_comm *get_comm(int nodeid) 765 { 766 struct config_item *i; 767 struct dlm_comm *cm = NULL; 768 int found = 0; 769 770 if (!comm_list) 771 return NULL; 772 773 mutex_lock(&clusters_root.subsys.su_mutex); 774 775 list_for_each_entry(i, &comm_list->cg_children, ci_entry) { 776 cm = config_item_to_comm(i); 777 778 if (cm->nodeid != nodeid) 779 continue; 780 found = 1; 781 config_item_get(i); 782 break; 783 } 784 mutex_unlock(&clusters_root.subsys.su_mutex); 785 786 if (!found) 787 cm = NULL; 788 return cm; 789 } 790 791 static void put_comm(struct dlm_comm *cm) 792 { 793 config_item_put(&cm->item); 794 } 795 796 /* caller must free mem */ 797 int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, 798 int *count_out) 799 { 800 struct dlm_space *sp; 801 struct dlm_node *nd; 802 struct dlm_config_node *nodes, *node; 803 int rv, count; 804 805 sp = get_space(lsname); 806 if (!sp) 807 return -EEXIST; 808 809 mutex_lock(&sp->members_lock); 810 if (!sp->members_count) { 811 rv = -EINVAL; 812 printk(KERN_ERR "dlm: zero members_count\n"); 813 goto out; 814 } 815 816 count = sp->members_count; 817 818 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS); 819 if (!nodes) { 820 rv = -ENOMEM; 821 goto out; 822 } 823 824 node = nodes; 825 list_for_each_entry(nd, &sp->members, list) { 826 node->nodeid = nd->nodeid; 827 node->weight = nd->weight; 828 node->new = nd->new; 829 node->comm_seq = nd->comm_seq; 830 node++; 831 832 nd->new = 0; 833 } 834 835 *count_out = count; 836 *nodes_out = nodes; 837 rv = 0; 838 out: 839 mutex_unlock(&sp->members_lock); 840 put_space(sp); 841 return rv; 842 } 843 844 int dlm_comm_seq(int nodeid, uint32_t *seq) 845 { 846 struct dlm_comm *cm = get_comm(nodeid); 847 if (!cm) 848 return -EEXIST; 849 *seq = cm->seq; 850 put_comm(cm); 851 return 0; 852 } 853 854 int dlm_our_nodeid(void) 855 { 856 return local_comm ? local_comm->nodeid : 0; 857 } 858 859 /* num 0 is first addr, num 1 is second addr */ 860 int dlm_our_addr(struct sockaddr_storage *addr, int num) 861 { 862 if (!local_comm) 863 return -1; 864 if (num + 1 > local_comm->addr_count) 865 return -1; 866 memcpy(addr, local_comm->addr[num], sizeof(*addr)); 867 return 0; 868 } 869 870 /* Config file defaults */ 871 #define DEFAULT_TCP_PORT 21064 872 #define DEFAULT_BUFFER_SIZE 4096 873 #define DEFAULT_RSBTBL_SIZE 1024 874 #define DEFAULT_RECOVER_TIMER 5 875 #define DEFAULT_TOSS_SECS 10 876 #define DEFAULT_SCAN_SECS 5 877 #define DEFAULT_LOG_DEBUG 0 878 #define DEFAULT_PROTOCOL 0 879 #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */ 880 #define DEFAULT_WAITWARN_US 0 881 #define DEFAULT_NEW_RSB_COUNT 128 882 #define DEFAULT_RECOVER_CALLBACKS 0 883 #define DEFAULT_CLUSTER_NAME "" 884 885 struct dlm_config_info dlm_config = { 886 .ci_tcp_port = DEFAULT_TCP_PORT, 887 .ci_buffer_size = DEFAULT_BUFFER_SIZE, 888 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, 889 .ci_recover_timer = DEFAULT_RECOVER_TIMER, 890 .ci_toss_secs = DEFAULT_TOSS_SECS, 891 .ci_scan_secs = DEFAULT_SCAN_SECS, 892 .ci_log_debug = DEFAULT_LOG_DEBUG, 893 .ci_protocol = DEFAULT_PROTOCOL, 894 .ci_timewarn_cs = DEFAULT_TIMEWARN_CS, 895 .ci_waitwarn_us = DEFAULT_WAITWARN_US, 896 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, 897 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, 898 .ci_cluster_name = DEFAULT_CLUSTER_NAME 899 }; 900 901