1/****************************************************************************** 2******************************************************************************* 3** 4** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 5** Copyright (C) 2004-2007 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 <net/sock.h> 18 19#include "config.h" 20#include "lowcomms.h" 21 22/* 23 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid 24 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight 25 * /config/dlm/<cluster>/comms/<comm>/nodeid 26 * /config/dlm/<cluster>/comms/<comm>/local 27 * /config/dlm/<cluster>/comms/<comm>/addr 28 * The <cluster> level is useless, but I haven't figured out how to avoid it. 29 */ 30 31static struct config_group *space_list; 32static struct config_group *comm_list; 33static struct comm *local_comm; 34 35struct clusters; 36struct cluster; 37struct spaces; 38struct space; 39struct comms; 40struct comm; 41struct nodes; 42struct node; 43 44static struct config_group *make_cluster(struct config_group *, const char *); 45static void drop_cluster(struct config_group *, struct config_item *); 46static void release_cluster(struct config_item *); 47static struct config_group *make_space(struct config_group *, const char *); 48static void drop_space(struct config_group *, struct config_item *); 49static void release_space(struct config_item *); 50static struct config_item *make_comm(struct config_group *, const char *); 51static void drop_comm(struct config_group *, struct config_item *); 52static void release_comm(struct config_item *); 53static struct config_item *make_node(struct config_group *, const char *); 54static void drop_node(struct config_group *, struct config_item *); 55static void release_node(struct config_item *); 56 57static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a, 58 char *buf); 59static ssize_t store_cluster(struct config_item *i, 60 struct configfs_attribute *a, 61 const char *buf, size_t len); 62static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, 63 char *buf); 64static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, 65 const char *buf, size_t len); 66static ssize_t show_node(struct config_item *i, struct configfs_attribute *a, 67 char *buf); 68static ssize_t store_node(struct config_item *i, struct configfs_attribute *a, 69 const char *buf, size_t len); 70 71static ssize_t comm_nodeid_read(struct comm *cm, char *buf); 72static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len); 73static ssize_t comm_local_read(struct comm *cm, char *buf); 74static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len); 75static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len); 76static ssize_t node_nodeid_read(struct node *nd, char *buf); 77static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len); 78static ssize_t node_weight_read(struct node *nd, char *buf); 79static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len); 80 81struct cluster { 82 struct config_group group; 83 unsigned int cl_tcp_port; 84 unsigned int cl_buffer_size; 85 unsigned int cl_rsbtbl_size; 86 unsigned int cl_lkbtbl_size; 87 unsigned int cl_dirtbl_size; 88 unsigned int cl_recover_timer; 89 unsigned int cl_toss_secs; 90 unsigned int cl_scan_secs; 91 unsigned int cl_log_debug; 92 unsigned int cl_protocol; 93}; 94 95enum { 96 CLUSTER_ATTR_TCP_PORT = 0, 97 CLUSTER_ATTR_BUFFER_SIZE, 98 CLUSTER_ATTR_RSBTBL_SIZE, 99 CLUSTER_ATTR_LKBTBL_SIZE, 100 CLUSTER_ATTR_DIRTBL_SIZE, 101 CLUSTER_ATTR_RECOVER_TIMER, 102 CLUSTER_ATTR_TOSS_SECS, 103 CLUSTER_ATTR_SCAN_SECS, 104 CLUSTER_ATTR_LOG_DEBUG, 105 CLUSTER_ATTR_PROTOCOL, 106}; 107 108struct cluster_attribute { 109 struct configfs_attribute attr; 110 ssize_t (*show)(struct cluster *, char *); 111 ssize_t (*store)(struct cluster *, const char *, size_t); 112}; 113 114static ssize_t cluster_set(struct cluster *cl, unsigned int *cl_field, 115 unsigned int *info_field, int check_zero, 116 const char *buf, size_t len) 117{ 118 unsigned int x; 119 120 if (!capable(CAP_SYS_ADMIN)) 121 return -EACCES; 122 123 x = simple_strtoul(buf, NULL, 0); 124 125 if (check_zero && !x) 126 return -EINVAL; 127 128 *cl_field = x; 129 *info_field = x; 130 131 return len; 132} 133 134#define __CONFIGFS_ATTR(_name,_mode,_read,_write) { \ 135 .attr = { .ca_name = __stringify(_name), \ 136 .ca_mode = _mode, \ 137 .ca_owner = THIS_MODULE }, \ 138 .show = _read, \ 139 .store = _write, \ 140} 141 142#define CLUSTER_ATTR(name, check_zero) \ 143static ssize_t name##_write(struct cluster *cl, const char *buf, size_t len) \ 144{ \ 145 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \ 146 check_zero, buf, len); \ 147} \ 148static ssize_t name##_read(struct cluster *cl, char *buf) \ 149{ \ 150 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ 151} \ 152static struct cluster_attribute cluster_attr_##name = \ 153__CONFIGFS_ATTR(name, 0644, name##_read, name##_write) 154 155CLUSTER_ATTR(tcp_port, 1); 156CLUSTER_ATTR(buffer_size, 1); 157CLUSTER_ATTR(rsbtbl_size, 1); 158CLUSTER_ATTR(lkbtbl_size, 1); 159CLUSTER_ATTR(dirtbl_size, 1); 160CLUSTER_ATTR(recover_timer, 1); 161CLUSTER_ATTR(toss_secs, 1); 162CLUSTER_ATTR(scan_secs, 1); 163CLUSTER_ATTR(log_debug, 0); 164CLUSTER_ATTR(protocol, 0); 165 166static struct configfs_attribute *cluster_attrs[] = { 167 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr, 168 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size.attr, 169 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size.attr, 170 [CLUSTER_ATTR_LKBTBL_SIZE] = &cluster_attr_lkbtbl_size.attr, 171 [CLUSTER_ATTR_DIRTBL_SIZE] = &cluster_attr_dirtbl_size.attr, 172 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer.attr, 173 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs.attr, 174 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs.attr, 175 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug.attr, 176 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol.attr, 177 NULL, 178}; 179 180enum { 181 COMM_ATTR_NODEID = 0, 182 COMM_ATTR_LOCAL, 183 COMM_ATTR_ADDR, 184}; 185 186struct comm_attribute { 187 struct configfs_attribute attr; 188 ssize_t (*show)(struct comm *, char *); 189 ssize_t (*store)(struct comm *, const char *, size_t); 190}; 191 192static struct comm_attribute comm_attr_nodeid = { 193 .attr = { .ca_owner = THIS_MODULE, 194 .ca_name = "nodeid", 195 .ca_mode = S_IRUGO | S_IWUSR }, 196 .show = comm_nodeid_read, 197 .store = comm_nodeid_write, 198}; 199 200static struct comm_attribute comm_attr_local = { 201 .attr = { .ca_owner = THIS_MODULE, 202 .ca_name = "local", 203 .ca_mode = S_IRUGO | S_IWUSR }, 204 .show = comm_local_read, 205 .store = comm_local_write, 206}; 207 208static struct comm_attribute comm_attr_addr = { 209 .attr = { .ca_owner = THIS_MODULE, 210 .ca_name = "addr", 211 .ca_mode = S_IRUGO | S_IWUSR }, 212 .store = comm_addr_write, 213}; 214 215static struct configfs_attribute *comm_attrs[] = { 216 [COMM_ATTR_NODEID] = &comm_attr_nodeid.attr, 217 [COMM_ATTR_LOCAL] = &comm_attr_local.attr, 218 [COMM_ATTR_ADDR] = &comm_attr_addr.attr, 219 NULL, 220}; 221 222enum { 223 NODE_ATTR_NODEID = 0, 224 NODE_ATTR_WEIGHT, 225}; 226 227struct node_attribute { 228 struct configfs_attribute attr; 229 ssize_t (*show)(struct node *, char *); 230 ssize_t (*store)(struct node *, const char *, size_t); 231}; 232 233static struct node_attribute node_attr_nodeid = { 234 .attr = { .ca_owner = THIS_MODULE, 235 .ca_name = "nodeid", 236 .ca_mode = S_IRUGO | S_IWUSR }, 237 .show = node_nodeid_read, 238 .store = node_nodeid_write, 239}; 240 241static struct node_attribute node_attr_weight = { 242 .attr = { .ca_owner = THIS_MODULE, 243 .ca_name = "weight", 244 .ca_mode = S_IRUGO | S_IWUSR }, 245 .show = node_weight_read, 246 .store = node_weight_write, 247}; 248 249static struct configfs_attribute *node_attrs[] = { 250 [NODE_ATTR_NODEID] = &node_attr_nodeid.attr, 251 [NODE_ATTR_WEIGHT] = &node_attr_weight.attr, 252 NULL, 253}; 254 255struct clusters { 256 struct configfs_subsystem subsys; 257}; 258 259struct spaces { 260 struct config_group ss_group; 261}; 262 263struct space { 264 struct config_group group; 265 struct list_head members; 266 struct mutex members_lock; 267 int members_count; 268}; 269 270struct comms { 271 struct config_group cs_group; 272}; 273 274struct comm { 275 struct config_item item; 276 int nodeid; 277 int local; 278 int addr_count; 279 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; 280}; 281 282struct nodes { 283 struct config_group ns_group; 284}; 285 286struct node { 287 struct config_item item; 288 struct list_head list; /* space->members */ 289 int nodeid; 290 int weight; 291}; 292 293static struct configfs_group_operations clusters_ops = { 294 .make_group = make_cluster, 295 .drop_item = drop_cluster, 296}; 297 298static struct configfs_item_operations cluster_ops = { 299 .release = release_cluster, 300 .show_attribute = show_cluster, 301 .store_attribute = store_cluster, 302}; 303 304static struct configfs_group_operations spaces_ops = { 305 .make_group = make_space, 306 .drop_item = drop_space, 307}; 308 309static struct configfs_item_operations space_ops = { 310 .release = release_space, 311}; 312 313static struct configfs_group_operations comms_ops = { 314 .make_item = make_comm, 315 .drop_item = drop_comm, 316}; 317 318static struct configfs_item_operations comm_ops = { 319 .release = release_comm, 320 .show_attribute = show_comm, 321 .store_attribute = store_comm, 322}; 323 324static struct configfs_group_operations nodes_ops = { 325 .make_item = make_node, 326 .drop_item = drop_node, 327}; 328 329static struct configfs_item_operations node_ops = { 330 .release = release_node, 331 .show_attribute = show_node, 332 .store_attribute = store_node, 333}; 334 335static struct config_item_type clusters_type = { 336 .ct_group_ops = &clusters_ops, 337 .ct_owner = THIS_MODULE, 338}; 339 340static struct config_item_type cluster_type = { 341 .ct_item_ops = &cluster_ops, 342 .ct_attrs = cluster_attrs, 343 .ct_owner = THIS_MODULE, 344}; 345 346static struct config_item_type spaces_type = { 347 .ct_group_ops = &spaces_ops, 348 .ct_owner = THIS_MODULE, 349}; 350 351static struct config_item_type space_type = { 352 .ct_item_ops = &space_ops, 353 .ct_owner = THIS_MODULE, 354}; 355 356static struct config_item_type comms_type = { 357 .ct_group_ops = &comms_ops, 358 .ct_owner = THIS_MODULE, 359}; 360 361static struct config_item_type comm_type = { 362 .ct_item_ops = &comm_ops, 363 .ct_attrs = comm_attrs, 364 .ct_owner = THIS_MODULE, 365}; 366 367static struct config_item_type nodes_type = { 368 .ct_group_ops = &nodes_ops, 369 .ct_owner = THIS_MODULE, 370}; 371 372static struct config_item_type node_type = { 373 .ct_item_ops = &node_ops, 374 .ct_attrs = node_attrs, 375 .ct_owner = THIS_MODULE, 376}; 377 378static struct cluster *to_cluster(struct config_item *i) 379{ 380 return i ? container_of(to_config_group(i), struct cluster, group):NULL; 381} 382 383static struct space *to_space(struct config_item *i) 384{ 385 return i ? container_of(to_config_group(i), struct space, group) : NULL; 386} 387 388static struct comm *to_comm(struct config_item *i) 389{ 390 return i ? container_of(i, struct comm, item) : NULL; 391} 392 393static struct node *to_node(struct config_item *i) 394{ 395 return i ? container_of(i, struct node, item) : NULL; 396} 397 398static struct config_group *make_cluster(struct config_group *g, 399 const char *name) 400{ 401 struct cluster *cl = NULL; 402 struct spaces *sps = NULL; 403 struct comms *cms = NULL; 404 void *gps = NULL; 405 406 cl = kzalloc(sizeof(struct cluster), GFP_KERNEL); 407 gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL); 408 sps = kzalloc(sizeof(struct spaces), GFP_KERNEL); 409 cms = kzalloc(sizeof(struct comms), GFP_KERNEL); 410 411 if (!cl || !gps || !sps || !cms) 412 goto fail; 413 414 config_group_init_type_name(&cl->group, name, &cluster_type); 415 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); 416 config_group_init_type_name(&cms->cs_group, "comms", &comms_type); 417 418 cl->group.default_groups = gps; 419 cl->group.default_groups[0] = &sps->ss_group; 420 cl->group.default_groups[1] = &cms->cs_group; 421 cl->group.default_groups[2] = NULL; 422 423 cl->cl_tcp_port = dlm_config.ci_tcp_port; 424 cl->cl_buffer_size = dlm_config.ci_buffer_size; 425 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; 426 cl->cl_lkbtbl_size = dlm_config.ci_lkbtbl_size; 427 cl->cl_dirtbl_size = dlm_config.ci_dirtbl_size; 428 cl->cl_recover_timer = dlm_config.ci_recover_timer; 429 cl->cl_toss_secs = dlm_config.ci_toss_secs; 430 cl->cl_scan_secs = dlm_config.ci_scan_secs; 431 cl->cl_log_debug = dlm_config.ci_log_debug; 432 433 space_list = &sps->ss_group; 434 comm_list = &cms->cs_group; 435 return &cl->group; 436 437 fail: 438 kfree(cl); 439 kfree(gps); 440 kfree(sps); 441 kfree(cms); 442 return NULL; 443} 444 445static void drop_cluster(struct config_group *g, struct config_item *i) 446{ 447 struct cluster *cl = to_cluster(i); 448 struct config_item *tmp; 449 int j; 450 451 for (j = 0; cl->group.default_groups[j]; j++) { 452 tmp = &cl->group.default_groups[j]->cg_item; 453 cl->group.default_groups[j] = NULL; 454 config_item_put(tmp); 455 } 456 457 space_list = NULL; 458 comm_list = NULL; 459 460 config_item_put(i); 461} 462 463static void release_cluster(struct config_item *i) 464{ 465 struct cluster *cl = to_cluster(i); 466 kfree(cl->group.default_groups); 467 kfree(cl); 468} 469 470static struct config_group *make_space(struct config_group *g, const char *name) 471{ 472 struct space *sp = NULL; 473 struct nodes *nds = NULL; 474 void *gps = NULL; 475 476 sp = kzalloc(sizeof(struct space), GFP_KERNEL); 477 gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL); 478 nds = kzalloc(sizeof(struct nodes), GFP_KERNEL); 479 480 if (!sp || !gps || !nds) 481 goto fail; 482 483 config_group_init_type_name(&sp->group, name, &space_type); 484 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); 485 486 sp->group.default_groups = gps; 487 sp->group.default_groups[0] = &nds->ns_group; 488 sp->group.default_groups[1] = NULL; 489 490 INIT_LIST_HEAD(&sp->members); 491 mutex_init(&sp->members_lock); 492 sp->members_count = 0; 493 return &sp->group; 494 495 fail: 496 kfree(sp); 497 kfree(gps); 498 kfree(nds); 499 return NULL; 500} 501 502static void drop_space(struct config_group *g, struct config_item *i) 503{ 504 struct space *sp = to_space(i); 505 struct config_item *tmp; 506 int j; 507 508 /* assert list_empty(&sp->members) */ 509 510 for (j = 0; sp->group.default_groups[j]; j++) { 511 tmp = &sp->group.default_groups[j]->cg_item; 512 sp->group.default_groups[j] = NULL; 513 config_item_put(tmp); 514 } 515 516 config_item_put(i); 517} 518 519static void release_space(struct config_item *i) 520{ 521 struct space *sp = to_space(i); 522 kfree(sp->group.default_groups); 523 kfree(sp); 524} 525 526static struct config_item *make_comm(struct config_group *g, const char *name) 527{ 528 struct comm *cm; 529 530 cm = kzalloc(sizeof(struct comm), GFP_KERNEL); 531 if (!cm) 532 return NULL; 533 534 config_item_init_type_name(&cm->item, name, &comm_type); 535 cm->nodeid = -1; 536 cm->local = 0; 537 cm->addr_count = 0; 538 return &cm->item; 539} 540 541static void drop_comm(struct config_group *g, struct config_item *i) 542{ 543 struct comm *cm = to_comm(i); 544 if (local_comm == cm) 545 local_comm = NULL; 546 dlm_lowcomms_close(cm->nodeid); 547 while (cm->addr_count--) 548 kfree(cm->addr[cm->addr_count]); 549 config_item_put(i); 550} 551 552static void release_comm(struct config_item *i) 553{ 554 struct comm *cm = to_comm(i); 555 kfree(cm); 556} 557 558static struct config_item *make_node(struct config_group *g, const char *name) 559{ 560 struct space *sp = to_space(g->cg_item.ci_parent); 561 struct node *nd; 562 563 nd = kzalloc(sizeof(struct node), GFP_KERNEL); 564 if (!nd) 565 return NULL; 566 567 config_item_init_type_name(&nd->item, name, &node_type); 568 nd->nodeid = -1; 569 nd->weight = 1; /* default weight of 1 if none is set */ 570 571 mutex_lock(&sp->members_lock); 572 list_add(&nd->list, &sp->members); 573 sp->members_count++; 574 mutex_unlock(&sp->members_lock); 575 576 return &nd->item; 577} 578 579static void drop_node(struct config_group *g, struct config_item *i) 580{ 581 struct space *sp = to_space(g->cg_item.ci_parent); 582 struct node *nd = to_node(i); 583 584 mutex_lock(&sp->members_lock); 585 list_del(&nd->list); 586 sp->members_count--; 587 mutex_unlock(&sp->members_lock); 588 589 config_item_put(i); 590} 591 592static void release_node(struct config_item *i) 593{ 594 struct node *nd = to_node(i); 595 kfree(nd); 596} 597 598static struct clusters clusters_root = { 599 .subsys = { 600 .su_group = { 601 .cg_item = { 602 .ci_namebuf = "dlm", 603 .ci_type = &clusters_type, 604 }, 605 }, 606 }, 607}; 608 609int dlm_config_init(void) 610{ 611 config_group_init(&clusters_root.subsys.su_group); 612 init_MUTEX(&clusters_root.subsys.su_sem); 613 return configfs_register_subsystem(&clusters_root.subsys); 614} 615 616void dlm_config_exit(void) 617{ 618 configfs_unregister_subsystem(&clusters_root.subsys); 619} 620 621/* 622 * Functions for user space to read/write attributes 623 */ 624 625static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a, 626 char *buf) 627{ 628 struct cluster *cl = to_cluster(i); 629 struct cluster_attribute *cla = 630 container_of(a, struct cluster_attribute, attr); 631 return cla->show ? cla->show(cl, buf) : 0; 632} 633 634static ssize_t store_cluster(struct config_item *i, 635 struct configfs_attribute *a, 636 const char *buf, size_t len) 637{ 638 struct cluster *cl = to_cluster(i); 639 struct cluster_attribute *cla = 640 container_of(a, struct cluster_attribute, attr); 641 return cla->store ? cla->store(cl, buf, len) : -EINVAL; 642} 643 644static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, 645 char *buf) 646{ 647 struct comm *cm = to_comm(i); 648 struct comm_attribute *cma = 649 container_of(a, struct comm_attribute, attr); 650 return cma->show ? cma->show(cm, buf) : 0; 651} 652 653static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, 654 const char *buf, size_t len) 655{ 656 struct comm *cm = to_comm(i); 657 struct comm_attribute *cma = 658 container_of(a, struct comm_attribute, attr); 659 return cma->store ? cma->store(cm, buf, len) : -EINVAL; 660} 661 662static ssize_t comm_nodeid_read(struct comm *cm, char *buf) 663{ 664 return sprintf(buf, "%d\n", cm->nodeid); 665} 666 667static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len) 668{ 669 cm->nodeid = simple_strtol(buf, NULL, 0); 670 return len; 671} 672 673static ssize_t comm_local_read(struct comm *cm, char *buf) 674{ 675 return sprintf(buf, "%d\n", cm->local); 676} 677 678static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len) 679{ 680 cm->local= simple_strtol(buf, NULL, 0); 681 if (cm->local && !local_comm) 682 local_comm = cm; 683 return len; 684} 685 686static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len) 687{ 688 struct sockaddr_storage *addr; 689 690 if (len != sizeof(struct sockaddr_storage)) 691 return -EINVAL; 692 693 if (cm->addr_count >= DLM_MAX_ADDR_COUNT) 694 return -ENOSPC; 695 696 addr = kzalloc(sizeof(*addr), GFP_KERNEL); 697 if (!addr) 698 return -ENOMEM; 699 700 memcpy(addr, buf, len); 701 cm->addr[cm->addr_count++] = addr; 702 return len; 703} 704 705static ssize_t show_node(struct config_item *i, struct configfs_attribute *a, 706 char *buf) 707{ 708 struct node *nd = to_node(i); 709 struct node_attribute *nda = 710 container_of(a, struct node_attribute, attr); 711 return nda->show ? nda->show(nd, buf) : 0; 712} 713 714static ssize_t store_node(struct config_item *i, struct configfs_attribute *a, 715 const char *buf, size_t len) 716{ 717 struct node *nd = to_node(i); 718 struct node_attribute *nda = 719 container_of(a, struct node_attribute, attr); 720 return nda->store ? nda->store(nd, buf, len) : -EINVAL; 721} 722 723static ssize_t node_nodeid_read(struct node *nd, char *buf) 724{ 725 return sprintf(buf, "%d\n", nd->nodeid); 726} 727 728static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len) 729{ 730 nd->nodeid = simple_strtol(buf, NULL, 0); 731 return len; 732} 733 734static ssize_t node_weight_read(struct node *nd, char *buf) 735{ 736 return sprintf(buf, "%d\n", nd->weight); 737} 738 739static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len) 740{ 741 nd->weight = simple_strtol(buf, NULL, 0); 742 return len; 743} 744 745/* 746 * Functions for the dlm to get the info that's been configured 747 */ 748 749static struct space *get_space(char *name) 750{ 751 if (!space_list) 752 return NULL; 753 return to_space(config_group_find_obj(space_list, name)); 754} 755 756static void put_space(struct space *sp) 757{ 758 config_item_put(&sp->group.cg_item); 759} 760 761static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr) 762{ 763 struct config_item *i; 764 struct comm *cm = NULL; 765 int found = 0; 766 767 if (!comm_list) 768 return NULL; 769 770 down(&clusters_root.subsys.su_sem); 771 772 list_for_each_entry(i, &comm_list->cg_children, ci_entry) { 773 cm = to_comm(i); 774 775 if (nodeid) { 776 if (cm->nodeid != nodeid) 777 continue; 778 found = 1; 779 break; 780 } else { 781 if (!cm->addr_count || 782 memcmp(cm->addr[0], addr, sizeof(*addr))) 783 continue; 784 found = 1; 785 break; 786 } 787 } 788 up(&clusters_root.subsys.su_sem); 789 790 if (found) 791 config_item_get(i); 792 else 793 cm = NULL; 794 return cm; 795} 796 797static void put_comm(struct comm *cm) 798{ 799 config_item_put(&cm->item); 800} 801 802/* caller must free mem */ 803int dlm_nodeid_list(char *lsname, int **ids_out) 804{ 805 struct space *sp; 806 struct node *nd; 807 int i = 0, rv = 0; 808 int *ids; 809 810 sp = get_space(lsname); 811 if (!sp) 812 return -EEXIST; 813 814 mutex_lock(&sp->members_lock); 815 if (!sp->members_count) { 816 rv = 0; 817 goto out; 818 } 819 820 ids = kcalloc(sp->members_count, sizeof(int), GFP_KERNEL); 821 if (!ids) { 822 rv = -ENOMEM; 823 goto out; 824 } 825 826 rv = sp->members_count; 827 list_for_each_entry(nd, &sp->members, list) 828 ids[i++] = nd->nodeid; 829 830 if (rv != i) 831 printk("bad nodeid count %d %d\n", rv, i); 832 833 *ids_out = ids; 834 out: 835 mutex_unlock(&sp->members_lock); 836 put_space(sp); 837 return rv; 838} 839 840int dlm_node_weight(char *lsname, int nodeid) 841{ 842 struct space *sp; 843 struct node *nd; 844 int w = -EEXIST; 845 846 sp = get_space(lsname); 847 if (!sp) 848 goto out; 849 850 mutex_lock(&sp->members_lock); 851 list_for_each_entry(nd, &sp->members, list) { 852 if (nd->nodeid != nodeid) 853 continue; 854 w = nd->weight; 855 break; 856 } 857 mutex_unlock(&sp->members_lock); 858 put_space(sp); 859 out: 860 return w; 861} 862 863int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr) 864{ 865 struct comm *cm = get_comm(nodeid, NULL); 866 if (!cm) 867 return -EEXIST; 868 if (!cm->addr_count) 869 return -ENOENT; 870 memcpy(addr, cm->addr[0], sizeof(*addr)); 871 put_comm(cm); 872 return 0; 873} 874 875int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid) 876{ 877 struct comm *cm = get_comm(0, addr); 878 if (!cm) 879 return -EEXIST; 880 *nodeid = cm->nodeid; 881 put_comm(cm); 882 return 0; 883} 884 885int dlm_our_nodeid(void) 886{ 887 return local_comm ? local_comm->nodeid : 0; 888} 889 890/* num 0 is first addr, num 1 is second addr */ 891int dlm_our_addr(struct sockaddr_storage *addr, int num) 892{ 893 if (!local_comm) 894 return -1; 895 if (num + 1 > local_comm->addr_count) 896 return -1; 897 memcpy(addr, local_comm->addr[num], sizeof(*addr)); 898 return 0; 899} 900 901/* Config file defaults */ 902#define DEFAULT_TCP_PORT 21064 903#define DEFAULT_BUFFER_SIZE 4096 904#define DEFAULT_RSBTBL_SIZE 256 905#define DEFAULT_LKBTBL_SIZE 1024 906#define DEFAULT_DIRTBL_SIZE 512 907#define DEFAULT_RECOVER_TIMER 5 908#define DEFAULT_TOSS_SECS 10 909#define DEFAULT_SCAN_SECS 5 910#define DEFAULT_LOG_DEBUG 0 911#define DEFAULT_PROTOCOL 0 912 913struct dlm_config_info dlm_config = { 914 .ci_tcp_port = DEFAULT_TCP_PORT, 915 .ci_buffer_size = DEFAULT_BUFFER_SIZE, 916 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, 917 .ci_lkbtbl_size = DEFAULT_LKBTBL_SIZE, 918 .ci_dirtbl_size = DEFAULT_DIRTBL_SIZE, 919 .ci_recover_timer = DEFAULT_RECOVER_TIMER, 920 .ci_toss_secs = DEFAULT_TOSS_SECS, 921 .ci_scan_secs = DEFAULT_SCAN_SECS, 922 .ci_log_debug = DEFAULT_LOG_DEBUG, 923 .ci_protocol = DEFAULT_PROTOCOL 924}; 925