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/*
Copyright Red Hat, Inc. 2004
The Magma Cluster API Library is free software; you can redistribute
it and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either version
2.1 of the License, or (at your option) any later version.
The Magma Cluster API Library is distributed in the hope that it will
be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
*/
/** @file
Local information lookup code for Magma.
*/
#include <magma.h>
#include <stdint.h>
#include <ip_lookup.h>
#include <string.h>
static int
_get_local_info(cluster_plugin_t *cpp, char *groupname)
{
int x, ret = -1;
cluster_member_list_t *members;
if (cpp->cp_private.p_localid != NODE_ID_NONE) {
return 0;
}
members = cp_member_list(cpp, groupname);
if (!members)
return -1;
for (x=0; x < members->cml_count; x++) {
if (ip_lookup(members->cml_members[x].cm_name, NULL) == 0) {
cpp->cp_private.p_localid =
members->cml_members[x].cm_id;
strncpy(cpp->cp_private.p_localname,
members->cml_members[x].cm_name,
sizeof(cpp->cp_private.p_localname)-1);
ret = 0;
break;
}
}
free(members);
return ret;
}
/**
Returns the local node name using the given plugin as the data source.
This function caches this information in the provided cpp plugin structure
for future use.
@param cpp Cluster plugin structure. Should already be opened,
but does not need to be logged in to a group.
@param groupname Group name. If the local node is not a member
of this group, the call will fail.
@param name Preallocated char array into which the local member's
node name is copied.
@param namelen Size, in bytes, of name parameter.
@return 0 on success, or -1 if the node is not a member of
the specified group.
*/
int
cp_local_nodename(cluster_plugin_t *cpp, char *groupname, char *name,
size_t namelen)
{
if (!cpp) {
errno = EINVAL;
return -1;
}
if (cpp->cp_private.p_localid == NODE_ID_NONE) {
if (_get_local_info(cpp, groupname) < 0) {
return -1;
}
}
strncpy(name, cpp->cp_private.p_localname, namelen);
return 0;
}
/**
Returns the local node ID using the given plugin as the data source.
This function caches this information for future use.
@param cpp Cluster plugin structure. Should already be opened,
but does not need to be logged in to a group.
@param groupname Group name. If the local node is not a member
of this group, the call will fail.
@param nodeid Pointer to node ID (uint64_t). Node ID
is copied in here.
@return 0 on success, or -1 if the node is not a member of
the specified group.
*/
int
cp_local_nodeid(cluster_plugin_t *cpp, char *groupname,
uint64_t *nodeid)
{
if (!cpp) {
errno = EINVAL;
return -1;
}
if (cpp->cp_private.p_localid == NODE_ID_NONE) {
if (_get_local_info(cpp, groupname) < 0) {
return -1;
}
}
*nodeid = cpp->cp_private.p_localid;
return 0;
}

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