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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.
*/
/* Resolves master_index to the actual interface. */
#include <errno.h>
#include <stdio.h>
#include "../handler.h"
#include "../match.h"
#include "../utils.h"
#include "master.h"
static int master_post(struct netns_entry *root);
static struct global_handler h_master = {
.post = master_post,
};
void handler_master_register(void)
{
global_handler_register(&h_master);
}
static int match_master(struct if_entry *entry, void *arg)
{
struct if_entry *slave = arg;
if (entry->if_index != slave->master_index)
return 0;
if (entry->ns == slave->ns)
return 2;
return 1;
}
static int match_link(struct if_entry *entry, void *arg)
{
struct if_entry *slave = arg;
if (entry->if_index != slave->link_index)
return 0;
if (entry->ns == slave->ns)
return 2;
return 1;
}
static int err_msg(int err, const char *type, struct if_entry *entry,
struct if_entry *check)
{
if (err > 0)
return err;
if (err < 0)
return if_add_warning(entry, "has a %s but failed to find it reliably", type);
if (!check)
return if_add_warning(entry, "has a %s but failed to find it", type);
return 0;
}
static int process(struct if_entry *entry, struct netns_entry *root)
{
int err;
if (entry->master_index) {
err = match_if_heur(&entry->master, root, 1, entry, match_master, entry);
if ((err = err_msg(err, "master", entry, entry->master)))
return err;
}
if (!entry->link && entry->link_index) {
err = match_if_heur(&entry->link, root, 1, entry, match_link, entry);
if ((err = err_msg(err, "link", entry, entry->link)))
return err;
}
return 0;
}
static int master_post(struct netns_entry *root)
{
struct netns_entry *ns;
struct if_entry *entry;
int err;
for (ns = root; ns; ns = ns->next) {
for (entry = ns->ifaces; entry; entry = entry->next) {
err = process(entry, root);
if (err)
return err;
}
}
return 0;
}
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