877 строки
21 KiB
C
877 строки
21 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/configfs.h>
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#include <linux/slab.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/dlmconstants.h>
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#include <net/ipv6.h>
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#include <net/sock.h>
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#include "config.h"
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#include "lowcomms.h"
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/*
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* /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
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* /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
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* /config/dlm/<cluster>/comms/<comm>/nodeid
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* /config/dlm/<cluster>/comms/<comm>/local
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* /config/dlm/<cluster>/comms/<comm>/addr (write only)
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* /config/dlm/<cluster>/comms/<comm>/addr_list (read only)
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* The <cluster> level is useless, but I haven't figured out how to avoid it.
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*/
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static struct config_group *space_list;
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static struct config_group *comm_list;
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static struct dlm_comm *local_comm;
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static uint32_t dlm_comm_count;
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struct dlm_clusters;
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struct dlm_cluster;
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struct dlm_spaces;
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struct dlm_space;
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struct dlm_comms;
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struct dlm_comm;
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struct dlm_nodes;
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struct dlm_node;
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static struct config_group *make_cluster(struct config_group *, const char *);
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static void drop_cluster(struct config_group *, struct config_item *);
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static void release_cluster(struct config_item *);
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static struct config_group *make_space(struct config_group *, const char *);
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static void drop_space(struct config_group *, struct config_item *);
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static void release_space(struct config_item *);
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static struct config_item *make_comm(struct config_group *, const char *);
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static void drop_comm(struct config_group *, struct config_item *);
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static void release_comm(struct config_item *);
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static struct config_item *make_node(struct config_group *, const char *);
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static void drop_node(struct config_group *, struct config_item *);
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static void release_node(struct config_item *);
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static struct configfs_attribute *comm_attrs[];
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static struct configfs_attribute *node_attrs[];
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struct dlm_cluster {
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struct config_group group;
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unsigned int cl_tcp_port;
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unsigned int cl_buffer_size;
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unsigned int cl_rsbtbl_size;
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unsigned int cl_recover_timer;
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unsigned int cl_toss_secs;
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unsigned int cl_scan_secs;
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unsigned int cl_log_debug;
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unsigned int cl_protocol;
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unsigned int cl_timewarn_cs;
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unsigned int cl_waitwarn_us;
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unsigned int cl_new_rsb_count;
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unsigned int cl_recover_callbacks;
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char cl_cluster_name[DLM_LOCKSPACE_LEN];
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};
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static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
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{
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return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
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NULL;
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}
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enum {
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CLUSTER_ATTR_TCP_PORT = 0,
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CLUSTER_ATTR_BUFFER_SIZE,
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CLUSTER_ATTR_RSBTBL_SIZE,
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CLUSTER_ATTR_RECOVER_TIMER,
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CLUSTER_ATTR_TOSS_SECS,
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CLUSTER_ATTR_SCAN_SECS,
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CLUSTER_ATTR_LOG_DEBUG,
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CLUSTER_ATTR_PROTOCOL,
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CLUSTER_ATTR_TIMEWARN_CS,
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CLUSTER_ATTR_WAITWARN_US,
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CLUSTER_ATTR_NEW_RSB_COUNT,
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CLUSTER_ATTR_RECOVER_CALLBACKS,
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CLUSTER_ATTR_CLUSTER_NAME,
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};
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static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf)
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{
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struct dlm_cluster *cl = config_item_to_cluster(item);
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return sprintf(buf, "%s\n", cl->cl_cluster_name);
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}
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static ssize_t cluster_cluster_name_store(struct config_item *item,
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const char *buf, size_t len)
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{
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struct dlm_cluster *cl = config_item_to_cluster(item);
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strlcpy(dlm_config.ci_cluster_name, buf,
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sizeof(dlm_config.ci_cluster_name));
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strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
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return len;
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}
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CONFIGFS_ATTR(cluster_, cluster_name);
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static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
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int *info_field, int check_zero,
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const char *buf, size_t len)
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{
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unsigned int x;
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int rc;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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rc = kstrtouint(buf, 0, &x);
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if (rc)
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return rc;
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if (check_zero && !x)
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return -EINVAL;
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*cl_field = x;
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*info_field = x;
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return len;
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}
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#define CLUSTER_ATTR(name, check_zero) \
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static ssize_t cluster_##name##_store(struct config_item *item, \
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const char *buf, size_t len) \
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{ \
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struct dlm_cluster *cl = config_item_to_cluster(item); \
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return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
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check_zero, buf, len); \
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} \
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static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \
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{ \
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struct dlm_cluster *cl = config_item_to_cluster(item); \
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return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
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} \
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CONFIGFS_ATTR(cluster_, name);
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CLUSTER_ATTR(tcp_port, 1);
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CLUSTER_ATTR(buffer_size, 1);
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CLUSTER_ATTR(rsbtbl_size, 1);
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CLUSTER_ATTR(recover_timer, 1);
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CLUSTER_ATTR(toss_secs, 1);
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CLUSTER_ATTR(scan_secs, 1);
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CLUSTER_ATTR(log_debug, 0);
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CLUSTER_ATTR(protocol, 0);
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CLUSTER_ATTR(timewarn_cs, 1);
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CLUSTER_ATTR(waitwarn_us, 0);
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CLUSTER_ATTR(new_rsb_count, 0);
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CLUSTER_ATTR(recover_callbacks, 0);
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static struct configfs_attribute *cluster_attrs[] = {
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[CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port,
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[CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size,
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[CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size,
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[CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer,
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[CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs,
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[CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs,
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[CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug,
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[CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
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[CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs,
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[CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us,
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[CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count,
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[CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks,
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[CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name,
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NULL,
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};
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enum {
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COMM_ATTR_NODEID = 0,
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COMM_ATTR_LOCAL,
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COMM_ATTR_ADDR,
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COMM_ATTR_ADDR_LIST,
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};
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enum {
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NODE_ATTR_NODEID = 0,
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NODE_ATTR_WEIGHT,
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};
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struct dlm_clusters {
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struct configfs_subsystem subsys;
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};
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struct dlm_spaces {
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struct config_group ss_group;
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};
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struct dlm_space {
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struct config_group group;
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struct list_head members;
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struct mutex members_lock;
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int members_count;
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};
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struct dlm_comms {
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struct config_group cs_group;
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};
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struct dlm_comm {
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struct config_item item;
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int seq;
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int nodeid;
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int local;
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int addr_count;
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struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
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};
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struct dlm_nodes {
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struct config_group ns_group;
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};
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struct dlm_node {
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struct config_item item;
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struct list_head list; /* space->members */
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int nodeid;
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int weight;
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int new;
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int comm_seq; /* copy of cm->seq when nd->nodeid is set */
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};
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static struct configfs_group_operations clusters_ops = {
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.make_group = make_cluster,
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.drop_item = drop_cluster,
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};
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static struct configfs_item_operations cluster_ops = {
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.release = release_cluster,
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};
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static struct configfs_group_operations spaces_ops = {
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.make_group = make_space,
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.drop_item = drop_space,
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};
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static struct configfs_item_operations space_ops = {
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.release = release_space,
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};
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static struct configfs_group_operations comms_ops = {
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.make_item = make_comm,
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.drop_item = drop_comm,
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};
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static struct configfs_item_operations comm_ops = {
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.release = release_comm,
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};
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static struct configfs_group_operations nodes_ops = {
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.make_item = make_node,
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.drop_item = drop_node,
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};
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static struct configfs_item_operations node_ops = {
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.release = release_node,
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};
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static struct config_item_type clusters_type = {
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.ct_group_ops = &clusters_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type cluster_type = {
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.ct_item_ops = &cluster_ops,
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.ct_attrs = cluster_attrs,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type spaces_type = {
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.ct_group_ops = &spaces_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type space_type = {
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.ct_item_ops = &space_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type comms_type = {
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.ct_group_ops = &comms_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type comm_type = {
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.ct_item_ops = &comm_ops,
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.ct_attrs = comm_attrs,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type nodes_type = {
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.ct_group_ops = &nodes_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type node_type = {
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.ct_item_ops = &node_ops,
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.ct_attrs = node_attrs,
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.ct_owner = THIS_MODULE,
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};
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static struct dlm_space *config_item_to_space(struct config_item *i)
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{
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return i ? container_of(to_config_group(i), struct dlm_space, group) :
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NULL;
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}
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static struct dlm_comm *config_item_to_comm(struct config_item *i)
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{
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return i ? container_of(i, struct dlm_comm, item) : NULL;
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}
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static struct dlm_node *config_item_to_node(struct config_item *i)
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{
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return i ? container_of(i, struct dlm_node, item) : NULL;
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}
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static struct config_group *make_cluster(struct config_group *g,
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const char *name)
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{
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struct dlm_cluster *cl = NULL;
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struct dlm_spaces *sps = NULL;
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struct dlm_comms *cms = NULL;
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void *gps = NULL;
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cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
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sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
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cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
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if (!cl || !gps || !sps || !cms)
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goto fail;
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config_group_init_type_name(&cl->group, name, &cluster_type);
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config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
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config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
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configfs_add_default_group(&sps->ss_group, &cl->group);
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configfs_add_default_group(&cms->cs_group, &cl->group);
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cl->cl_tcp_port = dlm_config.ci_tcp_port;
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cl->cl_buffer_size = dlm_config.ci_buffer_size;
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cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size;
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cl->cl_recover_timer = dlm_config.ci_recover_timer;
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cl->cl_toss_secs = dlm_config.ci_toss_secs;
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cl->cl_scan_secs = dlm_config.ci_scan_secs;
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cl->cl_log_debug = dlm_config.ci_log_debug;
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cl->cl_protocol = dlm_config.ci_protocol;
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cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
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cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us;
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cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
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cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
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memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
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DLM_LOCKSPACE_LEN);
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space_list = &sps->ss_group;
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comm_list = &cms->cs_group;
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return &cl->group;
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fail:
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kfree(cl);
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kfree(sps);
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kfree(cms);
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return ERR_PTR(-ENOMEM);
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}
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static void drop_cluster(struct config_group *g, struct config_item *i)
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{
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struct dlm_cluster *cl = config_item_to_cluster(i);
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configfs_remove_default_groups(&cl->group);
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space_list = NULL;
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comm_list = NULL;
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config_item_put(i);
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}
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static void release_cluster(struct config_item *i)
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{
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struct dlm_cluster *cl = config_item_to_cluster(i);
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kfree(cl);
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}
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static struct config_group *make_space(struct config_group *g, const char *name)
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{
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struct dlm_space *sp = NULL;
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struct dlm_nodes *nds = NULL;
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sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
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nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
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if (!sp || !nds)
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goto fail;
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config_group_init_type_name(&sp->group, name, &space_type);
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config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
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configfs_add_default_group(&nds->ns_group, &sp->group);
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INIT_LIST_HEAD(&sp->members);
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mutex_init(&sp->members_lock);
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sp->members_count = 0;
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return &sp->group;
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fail:
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kfree(sp);
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kfree(nds);
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return ERR_PTR(-ENOMEM);
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}
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static void drop_space(struct config_group *g, struct config_item *i)
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{
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struct dlm_space *sp = config_item_to_space(i);
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/* assert list_empty(&sp->members) */
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configfs_remove_default_groups(&sp->group);
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config_item_put(i);
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}
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static void release_space(struct config_item *i)
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{
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struct dlm_space *sp = config_item_to_space(i);
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kfree(sp);
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}
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static struct config_item *make_comm(struct config_group *g, const char *name)
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{
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struct dlm_comm *cm;
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cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS);
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if (!cm)
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return ERR_PTR(-ENOMEM);
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config_item_init_type_name(&cm->item, name, &comm_type);
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cm->seq = dlm_comm_count++;
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if (!cm->seq)
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cm->seq = dlm_comm_count++;
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cm->nodeid = -1;
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cm->local = 0;
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cm->addr_count = 0;
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return &cm->item;
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}
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static void drop_comm(struct config_group *g, struct config_item *i)
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{
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struct dlm_comm *cm = config_item_to_comm(i);
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if (local_comm == cm)
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local_comm = NULL;
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dlm_lowcomms_close(cm->nodeid);
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while (cm->addr_count--)
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kfree(cm->addr[cm->addr_count]);
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config_item_put(i);
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}
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static void release_comm(struct config_item *i)
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{
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struct dlm_comm *cm = config_item_to_comm(i);
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kfree(cm);
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}
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static struct config_item *make_node(struct config_group *g, const char *name)
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{
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struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
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struct dlm_node *nd;
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nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
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if (!nd)
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return ERR_PTR(-ENOMEM);
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config_item_init_type_name(&nd->item, name, &node_type);
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nd->nodeid = -1;
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nd->weight = 1; /* default weight of 1 if none is set */
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nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */
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mutex_lock(&sp->members_lock);
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list_add(&nd->list, &sp->members);
|
|
sp->members_count++;
|
|
mutex_unlock(&sp->members_lock);
|
|
|
|
return &nd->item;
|
|
}
|
|
|
|
static void drop_node(struct config_group *g, struct config_item *i)
|
|
{
|
|
struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
|
|
struct dlm_node *nd = config_item_to_node(i);
|
|
|
|
mutex_lock(&sp->members_lock);
|
|
list_del(&nd->list);
|
|
sp->members_count--;
|
|
mutex_unlock(&sp->members_lock);
|
|
|
|
config_item_put(i);
|
|
}
|
|
|
|
static void release_node(struct config_item *i)
|
|
{
|
|
struct dlm_node *nd = config_item_to_node(i);
|
|
kfree(nd);
|
|
}
|
|
|
|
static struct dlm_clusters clusters_root = {
|
|
.subsys = {
|
|
.su_group = {
|
|
.cg_item = {
|
|
.ci_namebuf = "dlm",
|
|
.ci_type = &clusters_type,
|
|
},
|
|
},
|
|
},
|
|
};
|
|
|
|
int __init dlm_config_init(void)
|
|
{
|
|
config_group_init(&clusters_root.subsys.su_group);
|
|
mutex_init(&clusters_root.subsys.su_mutex);
|
|
return configfs_register_subsystem(&clusters_root.subsys);
|
|
}
|
|
|
|
void dlm_config_exit(void)
|
|
{
|
|
configfs_unregister_subsystem(&clusters_root.subsys);
|
|
}
|
|
|
|
/*
|
|
* Functions for user space to read/write attributes
|
|
*/
|
|
|
|
static ssize_t comm_nodeid_show(struct config_item *item, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid);
|
|
}
|
|
|
|
static ssize_t comm_nodeid_store(struct config_item *item, const char *buf,
|
|
size_t len)
|
|
{
|
|
int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid);
|
|
|
|
if (rc)
|
|
return rc;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t comm_local_show(struct config_item *item, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", config_item_to_comm(item)->local);
|
|
}
|
|
|
|
static ssize_t comm_local_store(struct config_item *item, const char *buf,
|
|
size_t len)
|
|
{
|
|
struct dlm_comm *cm = config_item_to_comm(item);
|
|
int rc = kstrtoint(buf, 0, &cm->local);
|
|
|
|
if (rc)
|
|
return rc;
|
|
if (cm->local && !local_comm)
|
|
local_comm = cm;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t comm_addr_store(struct config_item *item, const char *buf,
|
|
size_t len)
|
|
{
|
|
struct dlm_comm *cm = config_item_to_comm(item);
|
|
struct sockaddr_storage *addr;
|
|
int rv;
|
|
|
|
if (len != sizeof(struct sockaddr_storage))
|
|
return -EINVAL;
|
|
|
|
if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
|
|
return -ENOSPC;
|
|
|
|
addr = kzalloc(sizeof(*addr), GFP_NOFS);
|
|
if (!addr)
|
|
return -ENOMEM;
|
|
|
|
memcpy(addr, buf, len);
|
|
|
|
rv = dlm_lowcomms_addr(cm->nodeid, addr, len);
|
|
if (rv) {
|
|
kfree(addr);
|
|
return rv;
|
|
}
|
|
|
|
cm->addr[cm->addr_count++] = addr;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t comm_addr_list_show(struct config_item *item, char *buf)
|
|
{
|
|
struct dlm_comm *cm = config_item_to_comm(item);
|
|
ssize_t s;
|
|
ssize_t allowance;
|
|
int i;
|
|
struct sockaddr_storage *addr;
|
|
struct sockaddr_in *addr_in;
|
|
struct sockaddr_in6 *addr_in6;
|
|
|
|
/* Taken from ip6_addr_string() defined in lib/vsprintf.c */
|
|
char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
|
|
|
|
|
|
/* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */
|
|
allowance = 4096;
|
|
buf[0] = '\0';
|
|
|
|
for (i = 0; i < cm->addr_count; i++) {
|
|
addr = cm->addr[i];
|
|
|
|
switch(addr->ss_family) {
|
|
case AF_INET:
|
|
addr_in = (struct sockaddr_in *)addr;
|
|
s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr);
|
|
break;
|
|
case AF_INET6:
|
|
addr_in6 = (struct sockaddr_in6 *)addr;
|
|
s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr);
|
|
break;
|
|
default:
|
|
s = sprintf(buf0, "%s\n", "<UNKNOWN>");
|
|
break;
|
|
}
|
|
allowance -= s;
|
|
if (allowance >= 0)
|
|
strcat(buf, buf0);
|
|
else {
|
|
allowance += s;
|
|
break;
|
|
}
|
|
}
|
|
return 4096 - allowance;
|
|
}
|
|
|
|
CONFIGFS_ATTR(comm_, nodeid);
|
|
CONFIGFS_ATTR(comm_, local);
|
|
CONFIGFS_ATTR_WO(comm_, addr);
|
|
CONFIGFS_ATTR_RO(comm_, addr_list);
|
|
|
|
static struct configfs_attribute *comm_attrs[] = {
|
|
[COMM_ATTR_NODEID] = &comm_attr_nodeid,
|
|
[COMM_ATTR_LOCAL] = &comm_attr_local,
|
|
[COMM_ATTR_ADDR] = &comm_attr_addr,
|
|
[COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list,
|
|
NULL,
|
|
};
|
|
|
|
static ssize_t node_nodeid_show(struct config_item *item, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid);
|
|
}
|
|
|
|
static ssize_t node_nodeid_store(struct config_item *item, const char *buf,
|
|
size_t len)
|
|
{
|
|
struct dlm_node *nd = config_item_to_node(item);
|
|
uint32_t seq = 0;
|
|
int rc = kstrtoint(buf, 0, &nd->nodeid);
|
|
|
|
if (rc)
|
|
return rc;
|
|
dlm_comm_seq(nd->nodeid, &seq);
|
|
nd->comm_seq = seq;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t node_weight_show(struct config_item *item, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", config_item_to_node(item)->weight);
|
|
}
|
|
|
|
static ssize_t node_weight_store(struct config_item *item, const char *buf,
|
|
size_t len)
|
|
{
|
|
int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight);
|
|
|
|
if (rc)
|
|
return rc;
|
|
return len;
|
|
}
|
|
|
|
CONFIGFS_ATTR(node_, nodeid);
|
|
CONFIGFS_ATTR(node_, weight);
|
|
|
|
static struct configfs_attribute *node_attrs[] = {
|
|
[NODE_ATTR_NODEID] = &node_attr_nodeid,
|
|
[NODE_ATTR_WEIGHT] = &node_attr_weight,
|
|
NULL,
|
|
};
|
|
|
|
/*
|
|
* Functions for the dlm to get the info that's been configured
|
|
*/
|
|
|
|
static struct dlm_space *get_space(char *name)
|
|
{
|
|
struct config_item *i;
|
|
|
|
if (!space_list)
|
|
return NULL;
|
|
|
|
mutex_lock(&space_list->cg_subsys->su_mutex);
|
|
i = config_group_find_item(space_list, name);
|
|
mutex_unlock(&space_list->cg_subsys->su_mutex);
|
|
|
|
return config_item_to_space(i);
|
|
}
|
|
|
|
static void put_space(struct dlm_space *sp)
|
|
{
|
|
config_item_put(&sp->group.cg_item);
|
|
}
|
|
|
|
static struct dlm_comm *get_comm(int nodeid)
|
|
{
|
|
struct config_item *i;
|
|
struct dlm_comm *cm = NULL;
|
|
int found = 0;
|
|
|
|
if (!comm_list)
|
|
return NULL;
|
|
|
|
mutex_lock(&clusters_root.subsys.su_mutex);
|
|
|
|
list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
|
|
cm = config_item_to_comm(i);
|
|
|
|
if (cm->nodeid != nodeid)
|
|
continue;
|
|
found = 1;
|
|
config_item_get(i);
|
|
break;
|
|
}
|
|
mutex_unlock(&clusters_root.subsys.su_mutex);
|
|
|
|
if (!found)
|
|
cm = NULL;
|
|
return cm;
|
|
}
|
|
|
|
static void put_comm(struct dlm_comm *cm)
|
|
{
|
|
config_item_put(&cm->item);
|
|
}
|
|
|
|
/* caller must free mem */
|
|
int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
|
|
int *count_out)
|
|
{
|
|
struct dlm_space *sp;
|
|
struct dlm_node *nd;
|
|
struct dlm_config_node *nodes, *node;
|
|
int rv, count;
|
|
|
|
sp = get_space(lsname);
|
|
if (!sp)
|
|
return -EEXIST;
|
|
|
|
mutex_lock(&sp->members_lock);
|
|
if (!sp->members_count) {
|
|
rv = -EINVAL;
|
|
printk(KERN_ERR "dlm: zero members_count\n");
|
|
goto out;
|
|
}
|
|
|
|
count = sp->members_count;
|
|
|
|
nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
|
|
if (!nodes) {
|
|
rv = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
node = nodes;
|
|
list_for_each_entry(nd, &sp->members, list) {
|
|
node->nodeid = nd->nodeid;
|
|
node->weight = nd->weight;
|
|
node->new = nd->new;
|
|
node->comm_seq = nd->comm_seq;
|
|
node++;
|
|
|
|
nd->new = 0;
|
|
}
|
|
|
|
*count_out = count;
|
|
*nodes_out = nodes;
|
|
rv = 0;
|
|
out:
|
|
mutex_unlock(&sp->members_lock);
|
|
put_space(sp);
|
|
return rv;
|
|
}
|
|
|
|
int dlm_comm_seq(int nodeid, uint32_t *seq)
|
|
{
|
|
struct dlm_comm *cm = get_comm(nodeid);
|
|
if (!cm)
|
|
return -EEXIST;
|
|
*seq = cm->seq;
|
|
put_comm(cm);
|
|
return 0;
|
|
}
|
|
|
|
int dlm_our_nodeid(void)
|
|
{
|
|
return local_comm ? local_comm->nodeid : 0;
|
|
}
|
|
|
|
/* num 0 is first addr, num 1 is second addr */
|
|
int dlm_our_addr(struct sockaddr_storage *addr, int num)
|
|
{
|
|
if (!local_comm)
|
|
return -1;
|
|
if (num + 1 > local_comm->addr_count)
|
|
return -1;
|
|
memcpy(addr, local_comm->addr[num], sizeof(*addr));
|
|
return 0;
|
|
}
|
|
|
|
/* Config file defaults */
|
|
#define DEFAULT_TCP_PORT 21064
|
|
#define DEFAULT_BUFFER_SIZE 4096
|
|
#define DEFAULT_RSBTBL_SIZE 1024
|
|
#define DEFAULT_RECOVER_TIMER 5
|
|
#define DEFAULT_TOSS_SECS 10
|
|
#define DEFAULT_SCAN_SECS 5
|
|
#define DEFAULT_LOG_DEBUG 0
|
|
#define DEFAULT_PROTOCOL 0
|
|
#define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */
|
|
#define DEFAULT_WAITWARN_US 0
|
|
#define DEFAULT_NEW_RSB_COUNT 128
|
|
#define DEFAULT_RECOVER_CALLBACKS 0
|
|
#define DEFAULT_CLUSTER_NAME ""
|
|
|
|
struct dlm_config_info dlm_config = {
|
|
.ci_tcp_port = DEFAULT_TCP_PORT,
|
|
.ci_buffer_size = DEFAULT_BUFFER_SIZE,
|
|
.ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
|
|
.ci_recover_timer = DEFAULT_RECOVER_TIMER,
|
|
.ci_toss_secs = DEFAULT_TOSS_SECS,
|
|
.ci_scan_secs = DEFAULT_SCAN_SECS,
|
|
.ci_log_debug = DEFAULT_LOG_DEBUG,
|
|
.ci_protocol = DEFAULT_PROTOCOL,
|
|
.ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
|
|
.ci_waitwarn_us = DEFAULT_WAITWARN_US,
|
|
.ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
|
|
.ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
|
|
.ci_cluster_name = DEFAULT_CLUSTER_NAME
|
|
};
|
|
|