975 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/******************************************************************************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>/nodeid28 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight29 * /config/dlm/<cluster>/comms/<comm>/nodeid30 * /config/dlm/<cluster>/comms/<comm>/local31 * /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 36static struct config_group *space_list;37static struct config_group *comm_list;38static struct dlm_comm *local_comm;39static uint32_t dlm_comm_count;40 41struct dlm_clusters;42struct dlm_cluster;43struct dlm_spaces;44struct dlm_space;45struct dlm_comms;46struct dlm_comm;47struct dlm_nodes;48struct dlm_node;49 50static struct config_group *make_cluster(struct config_group *, const char *);51static void drop_cluster(struct config_group *, struct config_item *);52static void release_cluster(struct config_item *);53static struct config_group *make_space(struct config_group *, const char *);54static void drop_space(struct config_group *, struct config_item *);55static void release_space(struct config_item *);56static struct config_item *make_comm(struct config_group *, const char *);57static void drop_comm(struct config_group *, struct config_item *);58static void release_comm(struct config_item *);59static struct config_item *make_node(struct config_group *, const char *);60static void drop_node(struct config_group *, struct config_item *);61static void release_node(struct config_item *);62 63static struct configfs_attribute *comm_attrs[];64static struct configfs_attribute *node_attrs[];65 66const 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 74struct 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 94static 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 100enum {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 116static 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 122static 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 133CONFIGFS_ATTR(cluster_, cluster_name);134 135static 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) \161static 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} \168static 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} \173CONFIGFS_ATTR(cluster_, name);174 175static 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 194static 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 205static int dlm_check_zero(unsigned int x)206{207 if (!x)208 return -EINVAL;209 210 return 0;211}212 213static 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 221CLUSTER_ATTR(tcp_port, dlm_check_zero_and_dlm_running);222CLUSTER_ATTR(buffer_size, dlm_check_buffer_size);223CLUSTER_ATTR(rsbtbl_size, dlm_check_zero);224CLUSTER_ATTR(recover_timer, dlm_check_zero);225CLUSTER_ATTR(toss_secs, dlm_check_zero);226CLUSTER_ATTR(scan_secs, dlm_check_zero);227CLUSTER_ATTR(log_debug, NULL);228CLUSTER_ATTR(log_info, NULL);229CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running);230CLUSTER_ATTR(mark, NULL);231CLUSTER_ATTR(new_rsb_count, NULL);232CLUSTER_ATTR(recover_callbacks, NULL);233 234static 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 251enum {252 COMM_ATTR_NODEID = 0,253 COMM_ATTR_LOCAL,254 COMM_ATTR_ADDR,255 COMM_ATTR_ADDR_LIST,256 COMM_ATTR_MARK,257};258 259enum {260 NODE_ATTR_NODEID = 0,261 NODE_ATTR_WEIGHT,262};263 264struct dlm_clusters {265 struct configfs_subsystem subsys;266};267 268struct dlm_spaces {269 struct config_group ss_group;270};271 272struct 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 280struct dlm_comms {281 struct config_group cs_group;282};283 284struct 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 294struct dlm_nodes {295 struct config_group ns_group;296};297 298struct 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 307static struct configfs_group_operations clusters_ops = {308 .make_group = make_cluster,309 .drop_item = drop_cluster,310};311 312static struct configfs_item_operations cluster_ops = {313 .release = release_cluster,314};315 316static struct configfs_group_operations spaces_ops = {317 .make_group = make_space,318 .drop_item = drop_space,319};320 321static struct configfs_item_operations space_ops = {322 .release = release_space,323};324 325static struct configfs_group_operations comms_ops = {326 .make_item = make_comm,327 .drop_item = drop_comm,328};329 330static struct configfs_item_operations comm_ops = {331 .release = release_comm,332};333 334static struct configfs_group_operations nodes_ops = {335 .make_item = make_node,336 .drop_item = drop_node,337};338 339static struct configfs_item_operations node_ops = {340 .release = release_node,341};342 343static const struct config_item_type clusters_type = {344 .ct_group_ops = &clusters_ops,345 .ct_owner = THIS_MODULE,346};347 348static 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 354static const struct config_item_type spaces_type = {355 .ct_group_ops = &spaces_ops,356 .ct_owner = THIS_MODULE,357};358 359static const struct config_item_type space_type = {360 .ct_item_ops = &space_ops,361 .ct_owner = THIS_MODULE,362};363 364static const struct config_item_type comms_type = {365 .ct_group_ops = &comms_ops,366 .ct_owner = THIS_MODULE,367};368 369static 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 375static const struct config_item_type nodes_type = {376 .ct_group_ops = &nodes_ops,377 .ct_owner = THIS_MODULE,378};379 380static 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 386static 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 392static 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 397static 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 402static 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 451static 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 463static 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 472static 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 500static 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 510static 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 517static 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 538static 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 549static void release_comm(struct config_item *i)550{551 struct dlm_comm *cm = config_item_to_comm(i);552 kfree(cm);553}554 555static 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 577static 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 590static void release_node(struct config_item *i)591{592 struct dlm_node *nd = config_item_to_node(i);593 kfree(nd);594}595 596static 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 607int __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 614void dlm_config_exit(void)615{616 configfs_unregister_subsystem(&clusters_root.subsys);617}618 619/*620 * Functions for user space to read/write attributes621 */622 623static 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 628static 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 638static 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 643static 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 656static 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);676 if (rv) {677 kfree(addr);678 return rv;679 }680 681 cm->addr[cm->addr_count++] = addr;682 return len;683}684 685static 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 730static 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 735static 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 758CONFIGFS_ATTR(comm_, nodeid);759CONFIGFS_ATTR(comm_, local);760CONFIGFS_ATTR(comm_, mark);761CONFIGFS_ATTR_WO(comm_, addr);762CONFIGFS_ATTR_RO(comm_, addr_list);763 764static 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 773static 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 778static 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 792static 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 797static 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 807CONFIGFS_ATTR(node_, nodeid);808CONFIGFS_ATTR(node_, weight);809 810static 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 configured818 */819 820static 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 834static void put_space(struct dlm_space *sp)835{836 config_item_put(&sp->group.cg_item);837}838 839static 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 866static void put_comm(struct dlm_comm *cm)867{868 config_item_put(&cm->item);869}870 871/* caller must free mem */872int 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 919int 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 929int dlm_our_nodeid(void)930{931 return local_comm->nodeid;932}933 934/* num 0 is first addr, num 1 is second addr */935int 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 21064947#define DEFAULT_RSBTBL_SIZE 1024948#define DEFAULT_RECOVER_TIMER 5949#define DEFAULT_TOSS_SECS 10950#define DEFAULT_SCAN_SECS 5951#define DEFAULT_LOG_DEBUG 0952#define DEFAULT_LOG_INFO 1953#define DEFAULT_PROTOCOL DLM_PROTO_TCP954#define DEFAULT_MARK 0955#define DEFAULT_NEW_RSB_COUNT 128956#define DEFAULT_RECOVER_CALLBACKS 0957#define DEFAULT_CLUSTER_NAME ""958 959struct 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_NAME973};974 975