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/*
* This file is a part of plotnetcfg, a tool to visualize network config.
* Copyright (C) 2014 Red Hat, Inc. -- Jiri Benc <jbenc@redhat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../ethtool.h"
#include "../handler.h"
#include "../match.h"
#include "../utils.h"
#include "veth.h"
static int veth_scan(struct if_entry *entry);
static int veth_post(struct if_entry *entry, struct netns_entry *root);
static struct handler h_veth = {
.driver = "veth",
.scan = veth_scan,
.post = veth_post,
};
void handler_veth_register(void)
{
handler_register(&h_veth);
}
static int veth_scan(struct if_entry *entry)
{
if (entry->link_index) {
entry->peer_index = entry->link_index;
entry->peer_netnsid = entry->link_netnsid;
entry->peer = entry->link;
entry->link_index = 0;
entry->link_netnsid = -1;
entry->link = NULL;
} else {
entry->peer_index = ethtool_veth_peer(entry->if_name);
}
return 0;
}
static int match_peer(struct if_entry *entry, void *arg)
{
struct if_entry *link = arg;
if (entry->if_index != link->peer_index ||
entry->peer_index != link->if_index ||
strcmp(entry->driver, "veth"))
return 0;
if (entry->peer && entry->peer != link)
return 0;
if (entry->ns == link->ns)
return 2;
return 1;
}
static int veth_post(struct if_entry *entry, struct netns_entry *root)
{
int err;
if (entry->peer)
return 0;
if (!entry->peer_index)
return ENOENT;
err = match_if_heur(&entry->peer, root, 1, entry, match_peer, entry);
if (err > 0)
return err;
if (err < 0)
return if_add_warning(entry, "failed to find the veth peer reliably");
if (!entry->peer)
return if_add_warning(entry, "failed to find the veth perr");
return 0;
}
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