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