blob: a0e7679f89531c405f230640da7a9d408e472496 [file] [log] [blame] [edit]
/*
* lib/route/link/api.c Link Info API
*
* This 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 version 2.1
* of the License.
*
* Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
*/
/**
* @ingroup link
* @defgroup link_info Link Info API
* @brief
*
* @par 1) Registering/Unregistering a new link info type
* @code
* static struct rtnl_link_info_ops vlan_info_ops = {
* .io_name = "vlan",
* .io_alloc = vlan_alloc,
* .io_parse = vlan_parse,
* .io_dump[NL_DUMP_BRIEF] = vlan_dump_brief,
* .io_dump[NL_DUMP_FULL] = vlan_dump_full,
* .io_free = vlan_free,
* };
*
* static void __init vlan_init(void)
* {
* rtnl_link_register_info(&vlan_info_ops);
* }
*
* static void __exit vlan_exit(void)
* {
* rtnl_link_unregister_info(&vlan_info_ops);
* }
* @endcode
*
* @{
*/
#include <netlink-local.h>
#include <netlink/netlink.h>
#include <netlink/utils.h>
#include <netlink/route/link.h>
#include <netlink/route/link/info-api.h>
static struct rtnl_link_info_ops *info_ops;
struct rtnl_link_info_ops *rtnl_link_info_ops_lookup(const char *name)
{
struct rtnl_link_info_ops *ops;
for (ops = info_ops; ops; ops = ops->io_next)
if (!strcmp(ops->io_name, name))
return ops;
return NULL;
}
int rtnl_link_register_info(struct rtnl_link_info_ops *ops)
{
if (ops->io_name == NULL)
return -NLE_INVAL;
if (rtnl_link_info_ops_lookup(ops->io_name))
return -NLE_EXIST;
NL_DBG(1, "Registered link info operations %s\n", ops->io_name);
ops->io_next = info_ops;
info_ops = ops;
return 0;
}
int rtnl_link_unregister_info(struct rtnl_link_info_ops *ops)
{
struct rtnl_link_info_ops *t, **tp;
for (tp = &info_ops; (t=*tp) != NULL; tp = &t->io_next)
if (t == ops)
break;
if (!t)
return -NLE_OPNOTSUPP;
if (t->io_refcnt > 0)
return -NLE_BUSY;
NL_DBG(1, "Unregistered link info perations %s\n", ops->io_name);
*tp = t->io_next;
return 0;
}
/** @} */