1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 ******************************************************************************* 4 ** 5 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 6 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 7 ** 8 ** 9 ******************************************************************************* 10 ******************************************************************************/ 11 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/configfs.h> 15 #include <linux/slab.h> 16 #include <linux/in.h> 17 #include <linux/in6.h> 18 #include <linux/dlmconstants.h> 19 #include <net/ipv6.h> 20 #include <net/sock.h> 21 22 #include "config.h" 23 #include "midcomms.h" 24 #include "lowcomms.h" 25 26 /* 27 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid 28 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight 29 * /config/dlm/<cluster>/comms/<comm>/nodeid 30 * /config/dlm/<cluster>/comms/<comm>/local 31 * /config/dlm/<cluster>/comms/<comm>/addr (write only) 32 * /config/dlm/<cluster>/comms/<comm>/addr_list (read only) 33 * The <cluster> level is useless, but I haven't figured out how to avoid it. 34 */ 35 36 static struct config_group *space_list; 37 static struct config_group *comm_list; 38 static struct dlm_comm *local_comm; 39 static uint32_t dlm_comm_count; 40 41 struct dlm_clusters; 42 struct dlm_cluster; 43 struct dlm_spaces; 44 struct dlm_space; 45 struct dlm_comms; 46 struct dlm_comm; 47 struct dlm_nodes; 48 struct dlm_node; 49 50 static struct config_group *make_cluster(struct config_group *, const char *); 51 static void drop_cluster(struct config_group *, struct config_item *); 52 static void release_cluster(struct config_item *); 53 static struct config_group *make_space(struct config_group *, const char *); 54 static void drop_space(struct config_group *, struct config_item *); 55 static void release_space(struct config_item *); 56 static struct config_item *make_comm(struct config_group *, const char *); 57 static void drop_comm(struct config_group *, struct config_item *); 58 static void release_comm(struct config_item *); 59 static struct config_item *make_node(struct config_group *, const char *); 60 static void drop_node(struct config_group *, struct config_item *); 61 static void release_node(struct config_item *); 62 63 static struct configfs_attribute *comm_attrs[]; 64 static struct configfs_attribute *node_attrs[]; 65 66 const struct rhashtable_params dlm_rhash_rsb_params = { 67 .nelem_hint = 3, /* start small */ 68 .key_len = DLM_RESNAME_MAXLEN, 69 .key_offset = offsetof(struct dlm_rsb, res_name), 70 .head_offset = offsetof(struct dlm_rsb, res_node), 71 .automatic_shrinking = true, 72 }; 73 74 struct dlm_cluster { 75 struct config_group group; 76 unsigned int cl_tcp_port; 77 unsigned int cl_buffer_size; 78 unsigned int cl_rsbtbl_size; 79 unsigned int cl_recover_timer; 80 unsigned int cl_toss_secs; 81 unsigned int cl_scan_secs; 82 unsigned int cl_log_debug; 83 unsigned int cl_log_info; 84 unsigned int cl_protocol; 85 unsigned int cl_mark; 86 unsigned int cl_new_rsb_count; 87 unsigned int cl_recover_callbacks; 88 char cl_cluster_name[DLM_LOCKSPACE_LEN]; 89 90 struct dlm_spaces *sps; 91 struct dlm_comms *cms; 92 }; 93 94 static struct dlm_cluster *config_item_to_cluster(struct config_item *i) 95 { 96 return i ? container_of(to_config_group(i), struct dlm_cluster, group) : 97 NULL; 98 } 99 100 enum { 101 CLUSTER_ATTR_TCP_PORT = 0, 102 CLUSTER_ATTR_BUFFER_SIZE, 103 CLUSTER_ATTR_RSBTBL_SIZE, 104 CLUSTER_ATTR_RECOVER_TIMER, 105 CLUSTER_ATTR_TOSS_SECS, 106 CLUSTER_ATTR_SCAN_SECS, 107 CLUSTER_ATTR_LOG_DEBUG, 108 CLUSTER_ATTR_LOG_INFO, 109 CLUSTER_ATTR_PROTOCOL, 110 CLUSTER_ATTR_MARK, 111 CLUSTER_ATTR_NEW_RSB_COUNT, 112 CLUSTER_ATTR_RECOVER_CALLBACKS, 113 CLUSTER_ATTR_CLUSTER_NAME, 114 }; 115 116 static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf) 117 { 118 struct dlm_cluster *cl = config_item_to_cluster(item); 119 return sprintf(buf, "%s\n", cl->cl_cluster_name); 120 } 121 122 static ssize_t cluster_cluster_name_store(struct config_item *item, 123 const char *buf, size_t len) 124 { 125 struct dlm_cluster *cl = config_item_to_cluster(item); 126 127 strscpy(dlm_config.ci_cluster_name, buf, 128 sizeof(dlm_config.ci_cluster_name)); 129 strscpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name)); 130 return len; 131 } 132 133 CONFIGFS_ATTR(cluster_, cluster_name); 134 135 static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field, 136 int *info_field, int (*check_cb)(unsigned int x), 137 const char *buf, size_t len) 138 { 139 unsigned int x; 140 int rc; 141 142 if (!capable(CAP_SYS_ADMIN)) 143 return -EPERM; 144 rc = kstrtouint(buf, 0, &x); 145 if (rc) 146 return rc; 147 148 if (check_cb) { 149 rc = check_cb(x); 150 if (rc) 151 return rc; 152 } 153 154 *cl_field = x; 155 *info_field = x; 156 157 return len; 158 } 159 160 #define CLUSTER_ATTR(name, check_cb) \ 161 static ssize_t cluster_##name##_store(struct config_item *item, \ 162 const char *buf, size_t len) \ 163 { \ 164 struct dlm_cluster *cl = config_item_to_cluster(item); \ 165 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \ 166 check_cb, buf, len); \ 167 } \ 168 static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \ 169 { \ 170 struct dlm_cluster *cl = config_item_to_cluster(item); \ 171 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ 172 } \ 173 CONFIGFS_ATTR(cluster_, name); 174 175 static int dlm_check_protocol_and_dlm_running(unsigned int x) 176 { 177 switch (x) { 178 case 0: 179 /* TCP */ 180 break; 181 case 1: 182 /* SCTP */ 183 break; 184 default: 185 return -EINVAL; 186 } 187 188 if (dlm_lowcomms_is_running()) 189 return -EBUSY; 190 191 return 0; 192 } 193 194 static int dlm_check_zero_and_dlm_running(unsigned int x) 195 { 196 if (!x) 197 return -EINVAL; 198 199 if (dlm_lowcomms_is_running()) 200 return -EBUSY; 201 202 return 0; 203 } 204 205 static int dlm_check_zero(unsigned int x) 206 { 207 if (!x) 208 return -EINVAL; 209 210 return 0; 211 } 212 213 static int dlm_check_buffer_size(unsigned int x) 214 { 215 if (x < DLM_MAX_SOCKET_BUFSIZE) 216 return -EINVAL; 217 218 return 0; 219 } 220 221 CLUSTER_ATTR(tcp_port, dlm_check_zero_and_dlm_running); 222 CLUSTER_ATTR(buffer_size, dlm_check_buffer_size); 223 CLUSTER_ATTR(rsbtbl_size, dlm_check_zero); 224 CLUSTER_ATTR(recover_timer, dlm_check_zero); 225 CLUSTER_ATTR(toss_secs, dlm_check_zero); 226 CLUSTER_ATTR(scan_secs, dlm_check_zero); 227 CLUSTER_ATTR(log_debug, NULL); 228 CLUSTER_ATTR(log_info, NULL); 229 CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running); 230 CLUSTER_ATTR(mark, NULL); 231 CLUSTER_ATTR(new_rsb_count, NULL); 232 CLUSTER_ATTR(recover_callbacks, NULL); 233 234 static struct configfs_attribute *cluster_attrs[] = { 235 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, 236 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, 237 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, 238 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, 239 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, 240 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, 241 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, 242 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info, 243 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, 244 [CLUSTER_ATTR_MARK] = &cluster_attr_mark, 245 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, 246 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, 247 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, 248 NULL, 249 }; 250 251 enum { 252 COMM_ATTR_NODEID = 0, 253 COMM_ATTR_LOCAL, 254 COMM_ATTR_ADDR, 255 COMM_ATTR_ADDR_LIST, 256 COMM_ATTR_MARK, 257 }; 258 259 enum { 260 NODE_ATTR_NODEID = 0, 261 NODE_ATTR_WEIGHT, 262 }; 263 264 struct dlm_clusters { 265 struct configfs_subsystem subsys; 266 }; 267 268 struct dlm_spaces { 269 struct config_group ss_group; 270 }; 271 272 struct dlm_space { 273 struct config_group group; 274 struct list_head members; 275 struct mutex members_lock; 276 int members_count; 277 struct dlm_nodes *nds; 278 }; 279 280 struct dlm_comms { 281 struct config_group cs_group; 282 }; 283 284 struct dlm_comm { 285 struct config_item item; 286 int seq; 287 int nodeid; 288 int local; 289 int addr_count; 290 unsigned int mark; 291 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; 292 }; 293 294 struct dlm_nodes { 295 struct config_group ns_group; 296 }; 297 298 struct dlm_node { 299 struct config_item item; 300 struct list_head list; /* space->members */ 301 int nodeid; 302 int weight; 303 int new; 304 int comm_seq; /* copy of cm->seq when nd->nodeid is set */ 305 }; 306 307 static struct configfs_group_operations clusters_ops = { 308 .make_group = make_cluster, 309 .drop_item = drop_cluster, 310 }; 311 312 static struct configfs_item_operations cluster_ops = { 313 .release = release_cluster, 314 }; 315 316 static struct configfs_group_operations spaces_ops = { 317 .make_group = make_space, 318 .drop_item = drop_space, 319 }; 320 321 static struct configfs_item_operations space_ops = { 322 .release = release_space, 323 }; 324 325 static struct configfs_group_operations comms_ops = { 326 .make_item = make_comm, 327 .drop_item = drop_comm, 328 }; 329 330 static struct configfs_item_operations comm_ops = { 331 .release = release_comm, 332 }; 333 334 static struct configfs_group_operations nodes_ops = { 335 .make_item = make_node, 336 .drop_item = drop_node, 337 }; 338 339 static struct configfs_item_operations node_ops = { 340 .release = release_node, 341 }; 342 343 static const struct config_item_type clusters_type = { 344 .ct_group_ops = &clusters_ops, 345 .ct_owner = THIS_MODULE, 346 }; 347 348 static const struct config_item_type cluster_type = { 349 .ct_item_ops = &cluster_ops, 350 .ct_attrs = cluster_attrs, 351 .ct_owner = THIS_MODULE, 352 }; 353 354 static const struct config_item_type spaces_type = { 355 .ct_group_ops = &spaces_ops, 356 .ct_owner = THIS_MODULE, 357 }; 358 359 static const struct config_item_type space_type = { 360 .ct_item_ops = &space_ops, 361 .ct_owner = THIS_MODULE, 362 }; 363 364 static const struct config_item_type comms_type = { 365 .ct_group_ops = &comms_ops, 366 .ct_owner = THIS_MODULE, 367 }; 368 369 static const struct config_item_type comm_type = { 370 .ct_item_ops = &comm_ops, 371 .ct_attrs = comm_attrs, 372 .ct_owner = THIS_MODULE, 373 }; 374 375 static const struct config_item_type nodes_type = { 376 .ct_group_ops = &nodes_ops, 377 .ct_owner = THIS_MODULE, 378 }; 379 380 static const struct config_item_type node_type = { 381 .ct_item_ops = &node_ops, 382 .ct_attrs = node_attrs, 383 .ct_owner = THIS_MODULE, 384 }; 385 386 static struct dlm_space *config_item_to_space(struct config_item *i) 387 { 388 return i ? container_of(to_config_group(i), struct dlm_space, group) : 389 NULL; 390 } 391 392 static struct dlm_comm *config_item_to_comm(struct config_item *i) 393 { 394 return i ? container_of(i, struct dlm_comm, item) : NULL; 395 } 396 397 static struct dlm_node *config_item_to_node(struct config_item *i) 398 { 399 return i ? container_of(i, struct dlm_node, item) : NULL; 400 } 401 402 static struct config_group *make_cluster(struct config_group *g, 403 const char *name) 404 { 405 struct dlm_cluster *cl = NULL; 406 struct dlm_spaces *sps = NULL; 407 struct dlm_comms *cms = NULL; 408 409 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); 410 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); 411 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); 412 413 if (!cl || !sps || !cms) 414 goto fail; 415 416 cl->sps = sps; 417 cl->cms = cms; 418 419 config_group_init_type_name(&cl->group, name, &cluster_type); 420 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); 421 config_group_init_type_name(&cms->cs_group, "comms", &comms_type); 422 423 configfs_add_default_group(&sps->ss_group, &cl->group); 424 configfs_add_default_group(&cms->cs_group, &cl->group); 425 426 cl->cl_tcp_port = dlm_config.ci_tcp_port; 427 cl->cl_buffer_size = dlm_config.ci_buffer_size; 428 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; 429 cl->cl_recover_timer = dlm_config.ci_recover_timer; 430 cl->cl_toss_secs = dlm_config.ci_toss_secs; 431 cl->cl_scan_secs = dlm_config.ci_scan_secs; 432 cl->cl_log_debug = dlm_config.ci_log_debug; 433 cl->cl_log_info = dlm_config.ci_log_info; 434 cl->cl_protocol = dlm_config.ci_protocol; 435 cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; 436 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; 437 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, 438 DLM_LOCKSPACE_LEN); 439 440 space_list = &sps->ss_group; 441 comm_list = &cms->cs_group; 442 return &cl->group; 443 444 fail: 445 kfree(cl); 446 kfree(sps); 447 kfree(cms); 448 return ERR_PTR(-ENOMEM); 449 } 450 451 static void drop_cluster(struct config_group *g, struct config_item *i) 452 { 453 struct dlm_cluster *cl = config_item_to_cluster(i); 454 455 configfs_remove_default_groups(&cl->group); 456 457 space_list = NULL; 458 comm_list = NULL; 459 460 config_item_put(i); 461 } 462 463 static void release_cluster(struct config_item *i) 464 { 465 struct dlm_cluster *cl = config_item_to_cluster(i); 466 467 kfree(cl->sps); 468 kfree(cl->cms); 469 kfree(cl); 470 } 471 472 static struct config_group *make_space(struct config_group *g, const char *name) 473 { 474 struct dlm_space *sp = NULL; 475 struct dlm_nodes *nds = NULL; 476 477 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); 478 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); 479 480 if (!sp || !nds) 481 goto fail; 482 483 config_group_init_type_name(&sp->group, name, &space_type); 484 485 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); 486 configfs_add_default_group(&nds->ns_group, &sp->group); 487 488 INIT_LIST_HEAD(&sp->members); 489 mutex_init(&sp->members_lock); 490 sp->members_count = 0; 491 sp->nds = nds; 492 return &sp->group; 493 494 fail: 495 kfree(sp); 496 kfree(nds); 497 return ERR_PTR(-ENOMEM); 498 } 499 500 static void drop_space(struct config_group *g, struct config_item *i) 501 { 502 struct dlm_space *sp = config_item_to_space(i); 503 504 /* assert list_empty(&sp->members) */ 505 506 configfs_remove_default_groups(&sp->group); 507 config_item_put(i); 508 } 509 510 static void release_space(struct config_item *i) 511 { 512 struct dlm_space *sp = config_item_to_space(i); 513 kfree(sp->nds); 514 kfree(sp); 515 } 516 517 static struct config_item *make_comm(struct config_group *g, const char *name) 518 { 519 struct dlm_comm *cm; 520 521 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); 522 if (!cm) 523 return ERR_PTR(-ENOMEM); 524 525 config_item_init_type_name(&cm->item, name, &comm_type); 526 527 cm->seq = dlm_comm_count++; 528 if (!cm->seq) 529 cm->seq = dlm_comm_count++; 530 531 cm->nodeid = -1; 532 cm->local = 0; 533 cm->addr_count = 0; 534 cm->mark = 0; 535 return &cm->item; 536 } 537 538 static void drop_comm(struct config_group *g, struct config_item *i) 539 { 540 struct dlm_comm *cm = config_item_to_comm(i); 541 if (local_comm == cm) 542 local_comm = NULL; 543 dlm_midcomms_close(cm->nodeid); 544 while (cm->addr_count--) 545 kfree(cm->addr[cm->addr_count]); 546 config_item_put(i); 547 } 548 549 static void release_comm(struct config_item *i) 550 { 551 struct dlm_comm *cm = config_item_to_comm(i); 552 kfree(cm); 553 } 554 555 static struct config_item *make_node(struct config_group *g, const char *name) 556 { 557 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 558 struct dlm_node *nd; 559 560 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); 561 if (!nd) 562 return ERR_PTR(-ENOMEM); 563 564 config_item_init_type_name(&nd->item, name, &node_type); 565 nd->nodeid = -1; 566 nd->weight = 1; /* default weight of 1 if none is set */ 567 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ 568 569 mutex_lock(&sp->members_lock); 570 list_add(&nd->list, &sp->members); 571 sp->members_count++; 572 mutex_unlock(&sp->members_lock); 573 574 return &nd->item; 575 } 576 577 static void drop_node(struct config_group *g, struct config_item *i) 578 { 579 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); 580 struct dlm_node *nd = config_item_to_node(i); 581 582 mutex_lock(&sp->members_lock); 583 list_del(&nd->list); 584 sp->members_count--; 585 mutex_unlock(&sp->members_lock); 586 587 config_item_put(i); 588 } 589 590 static void release_node(struct config_item *i) 591 { 592 struct dlm_node *nd = config_item_to_node(i); 593 kfree(nd); 594 } 595 596 static struct dlm_clusters clusters_root = { 597 .subsys = { 598 .su_group = { 599 .cg_item = { 600 .ci_namebuf = "dlm", 601 .ci_type = &clusters_type, 602 }, 603 }, 604 }, 605 }; 606 607 int __init dlm_config_init(void) 608 { 609 config_group_init(&clusters_root.subsys.su_group); 610 mutex_init(&clusters_root.subsys.su_mutex); 611 return configfs_register_subsystem(&clusters_root.subsys); 612 } 613 614 void dlm_config_exit(void) 615 { 616 configfs_unregister_subsystem(&clusters_root.subsys); 617 } 618 619 /* 620 * Functions for user space to read/write attributes 621 */ 622 623 static ssize_t comm_nodeid_show(struct config_item *item, char *buf) 624 { 625 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid); 626 } 627 628 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, 629 size_t len) 630 { 631 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid); 632 633 if (rc) 634 return rc; 635 return len; 636 } 637 638 static ssize_t comm_local_show(struct config_item *item, char *buf) 639 { 640 return sprintf(buf, "%d\n", config_item_to_comm(item)->local); 641 } 642 643 static ssize_t comm_local_store(struct config_item *item, const char *buf, 644 size_t len) 645 { 646 struct dlm_comm *cm = config_item_to_comm(item); 647 int rc = kstrtoint(buf, 0, &cm->local); 648 649 if (rc) 650 return rc; 651 if (cm->local && !local_comm) 652 local_comm = cm; 653 return len; 654 } 655 656 static ssize_t comm_addr_store(struct config_item *item, const char *buf, 657 size_t len) 658 { 659 struct dlm_comm *cm = config_item_to_comm(item); 660 struct sockaddr_storage *addr; 661 int rv; 662 663 if (len != sizeof(struct sockaddr_storage)) 664 return -EINVAL; 665 666 if (cm->addr_count >= DLM_MAX_ADDR_COUNT) 667 return -ENOSPC; 668 669 addr = kzalloc(sizeof(*addr), GFP_NOFS); 670 if (!addr) 671 return -ENOMEM; 672 673 memcpy(addr, buf, len); 674 675 rv = dlm_midcomms_addr(cm->nodeid, addr, len); 676 if (rv) { 677 kfree(addr); 678 return rv; 679 } 680 681 cm->addr[cm->addr_count++] = addr; 682 return len; 683 } 684 685 static ssize_t comm_addr_list_show(struct config_item *item, char *buf) 686 { 687 struct dlm_comm *cm = config_item_to_comm(item); 688 ssize_t s; 689 ssize_t allowance; 690 int i; 691 struct sockaddr_storage *addr; 692 struct sockaddr_in *addr_in; 693 struct sockaddr_in6 *addr_in6; 694 695 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ 696 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; 697 698 699 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ 700 allowance = 4096; 701 buf[0] = '\0'; 702 703 for (i = 0; i < cm->addr_count; i++) { 704 addr = cm->addr[i]; 705 706 switch(addr->ss_family) { 707 case AF_INET: 708 addr_in = (struct sockaddr_in *)addr; 709 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); 710 break; 711 case AF_INET6: 712 addr_in6 = (struct sockaddr_in6 *)addr; 713 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); 714 break; 715 default: 716 s = sprintf(buf0, "%s\n", "<UNKNOWN>"); 717 break; 718 } 719 allowance -= s; 720 if (allowance >= 0) 721 strcat(buf, buf0); 722 else { 723 allowance += s; 724 break; 725 } 726 } 727 return 4096 - allowance; 728 } 729 730 static ssize_t comm_mark_show(struct config_item *item, char *buf) 731 { 732 return sprintf(buf, "%u\n", config_item_to_comm(item)->mark); 733 } 734 735 static ssize_t comm_mark_store(struct config_item *item, const char *buf, 736 size_t len) 737 { 738 struct dlm_comm *comm; 739 unsigned int mark; 740 int rc; 741 742 rc = kstrtouint(buf, 0, &mark); 743 if (rc) 744 return rc; 745 746 if (mark == 0) 747 mark = dlm_config.ci_mark; 748 749 comm = config_item_to_comm(item); 750 rc = dlm_lowcomms_nodes_set_mark(comm->nodeid, mark); 751 if (rc) 752 return rc; 753 754 comm->mark = mark; 755 return len; 756 } 757 758 CONFIGFS_ATTR(comm_, nodeid); 759 CONFIGFS_ATTR(comm_, local); 760 CONFIGFS_ATTR(comm_, mark); 761 CONFIGFS_ATTR_WO(comm_, addr); 762 CONFIGFS_ATTR_RO(comm_, addr_list); 763 764 static struct configfs_attribute *comm_attrs[] = { 765 [COMM_ATTR_NODEID] = &comm_attr_nodeid, 766 [COMM_ATTR_LOCAL] = &comm_attr_local, 767 [COMM_ATTR_ADDR] = &comm_attr_addr, 768 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, 769 [COMM_ATTR_MARK] = &comm_attr_mark, 770 NULL, 771 }; 772 773 static ssize_t node_nodeid_show(struct config_item *item, char *buf) 774 { 775 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid); 776 } 777 778 static ssize_t node_nodeid_store(struct config_item *item, const char *buf, 779 size_t len) 780 { 781 struct dlm_node *nd = config_item_to_node(item); 782 uint32_t seq = 0; 783 int rc = kstrtoint(buf, 0, &nd->nodeid); 784 785 if (rc) 786 return rc; 787 dlm_comm_seq(nd->nodeid, &seq); 788 nd->comm_seq = seq; 789 return len; 790 } 791 792 static ssize_t node_weight_show(struct config_item *item, char *buf) 793 { 794 return sprintf(buf, "%d\n", config_item_to_node(item)->weight); 795 } 796 797 static ssize_t node_weight_store(struct config_item *item, const char *buf, 798 size_t len) 799 { 800 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); 801 802 if (rc) 803 return rc; 804 return len; 805 } 806 807 CONFIGFS_ATTR(node_, nodeid); 808 CONFIGFS_ATTR(node_, weight); 809 810 static struct configfs_attribute *node_attrs[] = { 811 [NODE_ATTR_NODEID] = &node_attr_nodeid, 812 [NODE_ATTR_WEIGHT] = &node_attr_weight, 813 NULL, 814 }; 815 816 /* 817 * Functions for the dlm to get the info that's been configured 818 */ 819 820 static struct dlm_space *get_space(char *name) 821 { 822 struct config_item *i; 823 824 if (!space_list) 825 return NULL; 826 827 mutex_lock(&space_list->cg_subsys->su_mutex); 828 i = config_group_find_item(space_list, name); 829 mutex_unlock(&space_list->cg_subsys->su_mutex); 830 831 return config_item_to_space(i); 832 } 833 834 static void put_space(struct dlm_space *sp) 835 { 836 config_item_put(&sp->group.cg_item); 837 } 838 839 static struct dlm_comm *get_comm(int nodeid) 840 { 841 struct config_item *i; 842 struct dlm_comm *cm = NULL; 843 int found = 0; 844 845 if (!comm_list) 846 return NULL; 847 848 mutex_lock(&clusters_root.subsys.su_mutex); 849 850 list_for_each_entry(i, &comm_list->cg_children, ci_entry) { 851 cm = config_item_to_comm(i); 852 853 if (cm->nodeid != nodeid) 854 continue; 855 found = 1; 856 config_item_get(i); 857 break; 858 } 859 mutex_unlock(&clusters_root.subsys.su_mutex); 860 861 if (!found) 862 cm = NULL; 863 return cm; 864 } 865 866 static void put_comm(struct dlm_comm *cm) 867 { 868 config_item_put(&cm->item); 869 } 870 871 /* caller must free mem */ 872 int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, 873 int *count_out) 874 { 875 struct dlm_space *sp; 876 struct dlm_node *nd; 877 struct dlm_config_node *nodes, *node; 878 int rv, count; 879 880 sp = get_space(lsname); 881 if (!sp) 882 return -EEXIST; 883 884 mutex_lock(&sp->members_lock); 885 if (!sp->members_count) { 886 rv = -EINVAL; 887 printk(KERN_ERR "dlm: zero members_count\n"); 888 goto out; 889 } 890 891 count = sp->members_count; 892 893 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS); 894 if (!nodes) { 895 rv = -ENOMEM; 896 goto out; 897 } 898 899 node = nodes; 900 list_for_each_entry(nd, &sp->members, list) { 901 node->nodeid = nd->nodeid; 902 node->weight = nd->weight; 903 node->new = nd->new; 904 node->comm_seq = nd->comm_seq; 905 node++; 906 907 nd->new = 0; 908 } 909 910 *count_out = count; 911 *nodes_out = nodes; 912 rv = 0; 913 out: 914 mutex_unlock(&sp->members_lock); 915 put_space(sp); 916 return rv; 917 } 918 919 int dlm_comm_seq(int nodeid, uint32_t *seq) 920 { 921 struct dlm_comm *cm = get_comm(nodeid); 922 if (!cm) 923 return -EEXIST; 924 *seq = cm->seq; 925 put_comm(cm); 926 return 0; 927 } 928 929 int dlm_our_nodeid(void) 930 { 931 return local_comm ? local_comm->nodeid : 0; 932 } 933 934 /* num 0 is first addr, num 1 is second addr */ 935 int dlm_our_addr(struct sockaddr_storage *addr, int num) 936 { 937 if (!local_comm) 938 return -1; 939 if (num + 1 > local_comm->addr_count) 940 return -1; 941 memcpy(addr, local_comm->addr[num], sizeof(*addr)); 942 return 0; 943 } 944 945 /* Config file defaults */ 946 #define DEFAULT_TCP_PORT 21064 947 #define DEFAULT_RSBTBL_SIZE 1024 948 #define DEFAULT_RECOVER_TIMER 5 949 #define DEFAULT_TOSS_SECS 10 950 #define DEFAULT_SCAN_SECS 5 951 #define DEFAULT_LOG_DEBUG 0 952 #define DEFAULT_LOG_INFO 1 953 #define DEFAULT_PROTOCOL DLM_PROTO_TCP 954 #define DEFAULT_MARK 0 955 #define DEFAULT_NEW_RSB_COUNT 128 956 #define DEFAULT_RECOVER_CALLBACKS 0 957 #define DEFAULT_CLUSTER_NAME "" 958 959 struct dlm_config_info dlm_config = { 960 .ci_tcp_port = DEFAULT_TCP_PORT, 961 .ci_buffer_size = DLM_MAX_SOCKET_BUFSIZE, 962 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, 963 .ci_recover_timer = DEFAULT_RECOVER_TIMER, 964 .ci_toss_secs = DEFAULT_TOSS_SECS, 965 .ci_scan_secs = DEFAULT_SCAN_SECS, 966 .ci_log_debug = DEFAULT_LOG_DEBUG, 967 .ci_log_info = DEFAULT_LOG_INFO, 968 .ci_protocol = DEFAULT_PROTOCOL, 969 .ci_mark = DEFAULT_MARK, 970 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, 971 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, 972 .ci_cluster_name = DEFAULT_CLUSTER_NAME 973 }; 974 975