fs/dlm/config.c

   1 /******************************************************************************
   2 *******************************************************************************
   3 **
   4 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
   5 **  Copyright (C) 2004-2005 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
  31 static struct config_group *space_list;
  32 static struct config_group *comm_list;
  33 static struct comm *local_comm;
  34
  35 struct clusters;
  36 struct cluster;
  37 struct spaces;
  38 struct space;
  39 struct comms;
  40 struct comm;
  41 struct nodes;
  42 struct node;
  43
  44 static struct config_group *make_cluster(struct config_group *, const char *);
  45 static void drop_cluster(struct config_group *, struct config_item *);
  46 static void release_cluster(struct config_item *);
  47 static struct config_group *make_space(struct config_group *, const char *);
  48 static void drop_space(struct config_group *, struct config_item *);
  49 static void release_space(struct config_item *);
  50 static struct config_item *make_comm(struct config_group *, const char *);
  51 static void drop_comm(struct config_group *, struct config_item *);
  52 static void release_comm(struct config_item *);
  53 static struct config_item *make_node(struct config_group *, const char *);
  54 static void drop_node(struct config_group *, struct config_item *);
  55 static void release_node(struct config_item *);
  56
  57 static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
  58                          char *buf);
  59 static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
  60                           const char *buf, size_t len);
  61 static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
  62                          char *buf);
  63 static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
  64                           const char *buf, size_t len);
  65
  66 static ssize_t comm_nodeid_read(struct comm *cm, char *buf);
  67 static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len);
  68 static ssize_t comm_local_read(struct comm *cm, char *buf);
  69 static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len);
  70 static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len);
  71 static ssize_t node_nodeid_read(struct node *nd, char *buf);
  72 static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len);
  73 static ssize_t node_weight_read(struct node *nd, char *buf);
  74 static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len);
  75
  76 enum {
  77         COMM_ATTR_NODEID = 0,
  78         COMM_ATTR_LOCAL,
  79         COMM_ATTR_ADDR,
  80 };
  81
  82 struct comm_attribute {
  83         struct configfs_attribute attr;
  84         ssize_t (*show)(struct comm *, char *);
  85         ssize_t (*store)(struct comm *, const char *, size_t);
  86 };
  87
  88 static struct comm_attribute comm_attr_nodeid = {
  89         .attr   = { .ca_owner = THIS_MODULE,
  90                     .ca_name = "nodeid",
  91                     .ca_mode = S_IRUGO | S_IWUSR },
  92         .show   = comm_nodeid_read,
  93         .store  = comm_nodeid_write,
  94 };
  95
  96 static struct comm_attribute comm_attr_local = {
  97         .attr   = { .ca_owner = THIS_MODULE,
  98                     .ca_name = "local",
  99                     .ca_mode = S_IRUGO | S_IWUSR },
 100         .show   = comm_local_read,
 101         .store  = comm_local_write,
 102 };
 103
 104 static struct comm_attribute comm_attr_addr = {
 105         .attr   = { .ca_owner = THIS_MODULE,
 106                     .ca_name = "addr",
 107                     .ca_mode = S_IRUGO | S_IWUSR },
 108         .store  = comm_addr_write,
 109 };
 110
 111 static struct configfs_attribute *comm_attrs[] = {
 112         [COMM_ATTR_NODEID] = &comm_attr_nodeid.attr,
 113         [COMM_ATTR_LOCAL] = &comm_attr_local.attr,
 114         [COMM_ATTR_ADDR] = &comm_attr_addr.attr,
 115         NULL,
 116 };
 117
 118 enum {
 119         NODE_ATTR_NODEID = 0,
 120         NODE_ATTR_WEIGHT,
 121 };
 122
 123 struct node_attribute {
 124         struct configfs_attribute attr;
 125         ssize_t (*show)(struct node *, char *);
 126         ssize_t (*store)(struct node *, const char *, size_t);
 127 };
 128
 129 static struct node_attribute node_attr_nodeid = {
 130         .attr   = { .ca_owner = THIS_MODULE,
 131                     .ca_name = "nodeid",
 132                     .ca_mode = S_IRUGO | S_IWUSR },
 133         .show   = node_nodeid_read,
 134         .store  = node_nodeid_write,
 135 };
 136
 137 static struct node_attribute node_attr_weight = {
 138         .attr   = { .ca_owner = THIS_MODULE,
 139                     .ca_name = "weight",
 140                     .ca_mode = S_IRUGO | S_IWUSR },
 141         .show   = node_weight_read,
 142         .store  = node_weight_write,
 143 };
 144
 145 static struct configfs_attribute *node_attrs[] = {
 146         [NODE_ATTR_NODEID] = &node_attr_nodeid.attr,
 147         [NODE_ATTR_WEIGHT] = &node_attr_weight.attr,
 148         NULL,
 149 };
 150
 151 struct clusters {
 152         struct configfs_subsystem subsys;
 153 };
 154
 155 struct cluster {
 156         struct config_group group;
 157 };
 158
 159 struct spaces {
 160         struct config_group ss_group;
 161 };
 162
 163 struct space {
 164         struct config_group group;
 165         struct list_head members;
 166         struct mutex members_lock;
 167         int members_count;
 168 };
 169
 170 struct comms {
 171         struct config_group cs_group;
 172 };
 173
 174 struct comm {
 175         struct config_item item;
 176         int nodeid;
 177         int local;
 178         int addr_count;
 179         struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
 180 };
 181
 182 struct nodes {
 183         struct config_group ns_group;
 184 };
 185
 186 struct node {
 187         struct config_item item;
 188         struct list_head list; /* space->members */
 189         int nodeid;
 190         int weight;
 191 };
 192
 193 static struct configfs_group_operations clusters_ops = {
 194         .make_group = make_cluster,
 195         .drop_item = drop_cluster,
 196 };
 197
 198 static struct configfs_item_operations cluster_ops = {
 199         .release = release_cluster,
 200 };
 201
 202 static struct configfs_group_operations spaces_ops = {
 203         .make_group = make_space,
 204         .drop_item = drop_space,
 205 };
 206
 207 static struct configfs_item_operations space_ops = {
 208         .release = release_space,
 209 };
 210
 211 static struct configfs_group_operations comms_ops = {
 212         .make_item = make_comm,
 213         .drop_item = drop_comm,
 214 };
 215
 216 static struct configfs_item_operations comm_ops = {
 217         .release = release_comm,
 218         .show_attribute = show_comm,
 219         .store_attribute = store_comm,
 220 };
 221
 222 static struct configfs_group_operations nodes_ops = {
 223         .make_item = make_node,
 224         .drop_item = drop_node,
 225 };
 226
 227 static struct configfs_item_operations node_ops = {
 228         .release = release_node,
 229         .show_attribute = show_node,
 230         .store_attribute = store_node,
 231 };
 232
 233 static struct config_item_type clusters_type = {
 234         .ct_group_ops = &clusters_ops,
 235         .ct_owner = THIS_MODULE,
 236 };
 237
 238 static struct config_item_type cluster_type = {
 239         .ct_item_ops = &cluster_ops,
 240         .ct_owner = THIS_MODULE,
 241 };
 242
 243 static struct config_item_type spaces_type = {
 244         .ct_group_ops = &spaces_ops,
 245         .ct_owner = THIS_MODULE,
 246 };
 247
 248 static struct config_item_type space_type = {
 249         .ct_item_ops = &space_ops,
 250         .ct_owner = THIS_MODULE,
 251 };
 252
 253 static struct config_item_type comms_type = {
 254         .ct_group_ops = &comms_ops,
 255         .ct_owner = THIS_MODULE,
 256 };
 257
 258 static struct config_item_type comm_type = {
 259         .ct_item_ops = &comm_ops,
 260         .ct_attrs = comm_attrs,
 261         .ct_owner = THIS_MODULE,
 262 };
 263
 264 static struct config_item_type nodes_type = {
 265         .ct_group_ops = &nodes_ops,
 266         .ct_owner = THIS_MODULE,
 267 };
 268
 269 static struct config_item_type node_type = {
 270         .ct_item_ops = &node_ops,
 271         .ct_attrs = node_attrs,
 272         .ct_owner = THIS_MODULE,
 273 };
 274
 275 static struct cluster *to_cluster(struct config_item *i)
 276 {
 277         return i ? container_of(to_config_group(i), struct cluster, group):NULL;
 278 }
 279
 280 static struct space *to_space(struct config_item *i)
 281 {
 282         return i ? container_of(to_config_group(i), struct space, group) : NULL;
 283 }
 284
 285 static struct comm *to_comm(struct config_item *i)
 286 {
 287         return i ? container_of(i, struct comm, item) : NULL;
 288 }
 289
 290 static struct node *to_node(struct config_item *i)
 291 {
 292         return i ? container_of(i, struct node, item) : NULL;
 293 }
 294
 295 static struct config_group *make_cluster(struct config_group *g,
 296                                          const char *name)
 297 {
 298         struct cluster *cl = NULL;
 299         struct spaces *sps = NULL;
 300         struct comms *cms = NULL;
 301         void *gps = NULL;
 302
 303         cl = kzalloc(sizeof(struct cluster), GFP_KERNEL);
 304         gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
 305         sps = kzalloc(sizeof(struct spaces), GFP_KERNEL);
 306         cms = kzalloc(sizeof(struct comms), GFP_KERNEL);
 307
 308         if (!cl || !gps || !sps || !cms)
 309                 goto fail;
 310
 311         config_group_init_type_name(&cl->group, name, &cluster_type);
 312         config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
 313         config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
 314
 315         cl->group.default_groups = gps;
 316         cl->group.default_groups[0] = &sps->ss_group;
 317         cl->group.default_groups[1] = &cms->cs_group;
 318         cl->group.default_groups[2] = NULL;
 319
 320         space_list = &sps->ss_group;
 321         comm_list = &cms->cs_group;
 322         return &cl->group;
 323
 324  fail:
 325         kfree(cl);
 326         kfree(gps);
 327         kfree(sps);
 328         kfree(cms);
 329         return NULL;
 330 }
 331
 332 static void drop_cluster(struct config_group *g, struct config_item *i)
 333 {
 334         struct cluster *cl = to_cluster(i);
 335         struct config_item *tmp;
 336         int j;
 337
 338         for (j = 0; cl->group.default_groups[j]; j++) {
 339                 tmp = &cl->group.default_groups[j]->cg_item;
 340                 cl->group.default_groups[j] = NULL;
 341                 config_item_put(tmp);
 342         }
 343
 344         space_list = NULL;
 345         comm_list = NULL;
 346
 347         config_item_put(i);
 348 }
 349
 350 static void release_cluster(struct config_item *i)
 351 {
 352         struct cluster *cl = to_cluster(i);
 353         kfree(cl->group.default_groups);
 354         kfree(cl);
 355 }
 356
 357 static struct config_group *make_space(struct config_group *g, const char *name)
 358 {
 359         struct space *sp = NULL;
 360         struct nodes *nds = NULL;
 361         void *gps = NULL;
 362
 363         sp = kzalloc(sizeof(struct space), GFP_KERNEL);
 364         gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL);
 365         nds = kzalloc(sizeof(struct nodes), GFP_KERNEL);
 366
 367         if (!sp || !gps || !nds)
 368                 goto fail;
 369
 370         config_group_init_type_name(&sp->group, name, &space_type);
 371         config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
 372
 373         sp->group.default_groups = gps;
 374         sp->group.default_groups[0] = &nds->ns_group;
 375         sp->group.default_groups[1] = NULL;
 376
 377         INIT_LIST_HEAD(&sp->members);
 378         mutex_init(&sp->members_lock);
 379         sp->members_count = 0;
 380         return &sp->group;
 381
 382  fail:
 383         kfree(sp);
 384         kfree(gps);
 385         kfree(nds);
 386         return NULL;
 387 }
 388
 389 static void drop_space(struct config_group *g, struct config_item *i)
 390 {
 391         struct space *sp = to_space(i);
 392         struct config_item *tmp;
 393         int j;
 394
 395         /* assert list_empty(&sp->members) */
 396
 397         for (j = 0; sp->group.default_groups[j]; j++) {
 398                 tmp = &sp->group.default_groups[j]->cg_item;
 399                 sp->group.default_groups[j] = NULL;
 400                 config_item_put(tmp);
 401         }
 402
 403         config_item_put(i);
 404 }
 405
 406 static void release_space(struct config_item *i)
 407 {
 408         struct space *sp = to_space(i);
 409         kfree(sp->group.default_groups);
 410         kfree(sp);
 411 }
 412
 413 static struct config_item *make_comm(struct config_group *g, const char *name)
 414 {
 415         struct comm *cm;
 416
 417         cm = kzalloc(sizeof(struct comm), GFP_KERNEL);
 418         if (!cm)
 419                 return NULL;
 420
 421         config_item_init_type_name(&cm->item, name, &comm_type);
 422         cm->nodeid = -1;
 423         cm->local = 0;
 424         cm->addr_count = 0;
 425         return &cm->item;
 426 }
 427
 428 static void drop_comm(struct config_group *g, struct config_item *i)
 429 {
 430         struct comm *cm = to_comm(i);
 431         if (local_comm == cm)
 432                 local_comm = NULL;
 433         dlm_lowcomms_close(cm->nodeid);
 434         while (cm->addr_count--)
 435                 kfree(cm->addr[cm->addr_count]);
 436         config_item_put(i);
 437 }
 438
 439 static void release_comm(struct config_item *i)
 440 {
 441         struct comm *cm = to_comm(i);
 442         kfree(cm);
 443 }
 444
 445 static struct config_item *make_node(struct config_group *g, const char *name)
 446 {
 447         struct space *sp = to_space(g->cg_item.ci_parent);
 448         struct node *nd;
 449
 450         nd = kzalloc(sizeof(struct node), GFP_KERNEL);
 451         if (!nd)
 452                 return NULL;
 453
 454         config_item_init_type_name(&nd->item, name, &node_type);
 455         nd->nodeid = -1;
 456         nd->weight = 1;  /* default weight of 1 if none is set */
 457
 458         mutex_lock(&sp->members_lock);
 459         list_add(&nd->list, &sp->members);
 460         sp->members_count++;
 461         mutex_unlock(&sp->members_lock);
 462
 463         return &nd->item;
 464 }
 465
 466 static void drop_node(struct config_group *g, struct config_item *i)
 467 {
 468         struct space *sp = to_space(g->cg_item.ci_parent);
 469         struct node *nd = to_node(i);
 470
 471         mutex_lock(&sp->members_lock);
 472         list_del(&nd->list);
 473         sp->members_count--;
 474         mutex_unlock(&sp->members_lock);
 475
 476         config_item_put(i);
 477 }
 478
 479 static void release_node(struct config_item *i)
 480 {
 481         struct node *nd = to_node(i);
 482         kfree(nd);
 483 }
 484
 485 static struct clusters clusters_root = {
 486         .subsys = {
 487                 .su_group = {
 488                         .cg_item = {
 489                                 .ci_namebuf = "dlm",
 490                                 .ci_type = &clusters_type,
 491                         },
 492                 },
 493         },
 494 };
 495
 496 int dlm_config_init(void)
 497 {
 498         config_group_init(&clusters_root.subsys.su_group);
 499         init_MUTEX(&clusters_root.subsys.su_sem);
 500         return configfs_register_subsystem(&clusters_root.subsys);
 501 }
 502
 503 void dlm_config_exit(void)
 504 {
 505         configfs_unregister_subsystem(&clusters_root.subsys);
 506 }
 507
 508 /*
 509  * Functions for user space to read/write attributes
 510  */
 511
 512 static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
 513                          char *buf)
 514 {
 515         struct comm *cm = to_comm(i);
 516         struct comm_attribute *cma =
 517                         container_of(a, struct comm_attribute, attr);
 518         return cma->show ? cma->show(cm, buf) : 0;
 519 }
 520
 521 static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
 522                           const char *buf, size_t len)
 523 {
 524         struct comm *cm = to_comm(i);
 525         struct comm_attribute *cma =
 526                 container_of(a, struct comm_attribute, attr);
 527         return cma->store ? cma->store(cm, buf, len) : -EINVAL;
 528 }
 529
 530 static ssize_t comm_nodeid_read(struct comm *cm, char *buf)
 531 {
 532         return sprintf(buf, "%d\n", cm->nodeid);
 533 }
 534
 535 static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len)
 536 {
 537         cm->nodeid = simple_strtol(buf, NULL, 0);
 538         return len;
 539 }
 540
 541 static ssize_t comm_local_read(struct comm *cm, char *buf)
 542 {
 543         return sprintf(buf, "%d\n", cm->local);
 544 }
 545
 546 static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len)
 547 {
 548         cm->local= simple_strtol(buf, NULL, 0);
 549         if (cm->local && !local_comm)
 550                 local_comm = cm;
 551         return len;
 552 }
 553
 554 static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len)
 555 {
 556         struct sockaddr_storage *addr;
 557
 558         if (len != sizeof(struct sockaddr_storage))
 559                 return -EINVAL;
 560
 561         if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
 562                 return -ENOSPC;
 563
 564         addr = kzalloc(sizeof(*addr), GFP_KERNEL);
 565         if (!addr)
 566                 return -ENOMEM;
 567
 568         memcpy(addr, buf, len);
 569         cm->addr[cm->addr_count++] = addr;
 570         return len;
 571 }
 572
 573 static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
 574                          char *buf)
 575 {
 576         struct node *nd = to_node(i);
 577         struct node_attribute *nda =
 578                         container_of(a, struct node_attribute, attr);
 579         return nda->show ? nda->show(nd, buf) : 0;
 580 }
 581
 582 static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
 583                           const char *buf, size_t len)
 584 {
 585         struct node *nd = to_node(i);
 586         struct node_attribute *nda =
 587                 container_of(a, struct node_attribute, attr);
 588         return nda->store ? nda->store(nd, buf, len) : -EINVAL;
 589 }
 590
 591 static ssize_t node_nodeid_read(struct node *nd, char *buf)
 592 {
 593         return sprintf(buf, "%d\n", nd->nodeid);
 594 }
 595
 596 static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len)
 597 {
 598         nd->nodeid = simple_strtol(buf, NULL, 0);
 599         return len;
 600 }
 601
 602 static ssize_t node_weight_read(struct node *nd, char *buf)
 603 {
 604         return sprintf(buf, "%d\n", nd->weight);
 605 }
 606
 607 static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len)
 608 {
 609         nd->weight = simple_strtol(buf, NULL, 0);
 610         return len;
 611 }
 612
 613 /*
 614  * Functions for the dlm to get the info that's been configured
 615  */
 616
 617 static struct space *get_space(char *name)
 618 {
 619         if (!space_list)
 620                 return NULL;
 621         return to_space(config_group_find_obj(space_list, name));
 622 }
 623
 624 static void put_space(struct space *sp)
 625 {
 626         config_item_put(&sp->group.cg_item);
 627 }
 628
 629 static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr)
 630 {
 631         struct config_item *i;
 632         struct comm *cm = NULL;
 633         int found = 0;
 634
 635         if (!comm_list)
 636                 return NULL;
 637
 638         down(&clusters_root.subsys.su_sem);
 639
 640         list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
 641                 cm = to_comm(i);
 642
 643                 if (nodeid) {
 644                         if (cm->nodeid != nodeid)
 645                                 continue;
 646                         found = 1;
 647                         break;
 648                 } else {
 649                         if (!cm->addr_count ||
 650                             memcmp(cm->addr[0], addr, sizeof(*addr)))
 651                                 continue;
 652                         found = 1;
 653                         break;
 654                 }
 655         }
 656         up(&clusters_root.subsys.su_sem);
 657
 658         if (found)
 659                 config_item_get(i);
 660         else
 661                 cm = NULL;
 662         return cm;
 663 }
 664
 665 static void put_comm(struct comm *cm)
 666 {
 667         config_item_put(&cm->item);
 668 }
 669
 670 /* caller must free mem */
 671 int dlm_nodeid_list(char *lsname, int **ids_out)
 672 {
 673         struct space *sp;
 674         struct node *nd;
 675         int i = 0, rv = 0;
 676         int *ids;
 677
 678         sp = get_space(lsname);
 679         if (!sp)
 680                 return -EEXIST;
 681
 682         mutex_lock(&sp->members_lock);
 683         if (!sp->members_count) {
 684                 rv = 0;
 685                 goto out;
 686         }
 687
 688         ids = kcalloc(sp->members_count, sizeof(int), GFP_KERNEL);
 689         if (!ids) {
 690                 rv = -ENOMEM;
 691                 goto out;
 692         }
 693
 694         rv = sp->members_count;
 695         list_for_each_entry(nd, &sp->members, list)
 696                 ids[i++] = nd->nodeid;
 697
 698         if (rv != i)
 699                 printk("bad nodeid count %d %d\n", rv, i);
 700
 701         *ids_out = ids;
 702  out:
 703         mutex_unlock(&sp->members_lock);
 704         put_space(sp);
 705         return rv;
 706 }
 707
 708 int dlm_node_weight(char *lsname, int nodeid)
 709 {
 710         struct space *sp;
 711         struct node *nd;
 712         int w = -EEXIST;
 713
 714         sp = get_space(lsname);
 715         if (!sp)
 716                 goto out;
 717
 718         mutex_lock(&sp->members_lock);
 719         list_for_each_entry(nd, &sp->members, list) {
 720                 if (nd->nodeid != nodeid)
 721                         continue;
 722                 w = nd->weight;
 723                 break;
 724         }
 725         mutex_unlock(&sp->members_lock);
 726         put_space(sp);
 727  out:
 728         return w;
 729 }
 730
 731 int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr)
 732 {
 733         struct comm *cm = get_comm(nodeid, NULL);
 734         if (!cm)
 735                 return -EEXIST;
 736         if (!cm->addr_count)
 737                 return -ENOENT;
 738         memcpy(addr, cm->addr[0], sizeof(*addr));
 739         put_comm(cm);
 740         return 0;
 741 }
 742
 743 int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid)
 744 {
 745         struct comm *cm = get_comm(0, addr);
 746         if (!cm)
 747                 return -EEXIST;
 748         *nodeid = cm->nodeid;
 749         put_comm(cm);
 750         return 0;
 751 }
 752
 753 int dlm_our_nodeid(void)
 754 {
 755         return local_comm ? local_comm->nodeid : 0;
 756 }
 757
 758 /* num 0 is first addr, num 1 is second addr */
 759 int dlm_our_addr(struct sockaddr_storage *addr, int num)
 760 {
 761         if (!local_comm)
 762                 return -1;
 763         if (num + 1 > local_comm->addr_count)
 764                 return -1;
 765         memcpy(addr, local_comm->addr[num], sizeof(*addr));
 766         return 0;
 767 }
 768
 769 /* Config file defaults */
 770 #define DEFAULT_TCP_PORT       21064
 771 #define DEFAULT_BUFFER_SIZE     4096
 772 #define DEFAULT_RSBTBL_SIZE      256
 773 #define DEFAULT_LKBTBL_SIZE     1024
 774 #define DEFAULT_DIRTBL_SIZE      512
 775 #define DEFAULT_RECOVER_TIMER      5
 776 #define DEFAULT_TOSS_SECS         10
 777 #define DEFAULT_SCAN_SECS          5
 778
 779 struct dlm_config_info dlm_config = {
 780         .tcp_port = DEFAULT_TCP_PORT,
 781         .buffer_size = DEFAULT_BUFFER_SIZE,
 782         .rsbtbl_size = DEFAULT_RSBTBL_SIZE,
 783         .lkbtbl_size = DEFAULT_LKBTBL_SIZE,
 784         .dirtbl_size = DEFAULT_DIRTBL_SIZE,
 785         .recover_timer = DEFAULT_RECOVER_TIMER,
 786         .toss_secs = DEFAULT_TOSS_SECS,
 787         .scan_secs = DEFAULT_SCAN_SECS
 788 };
 789