/*
- * Copyright (c) 2011 Nicira Networks.
+ * Copyright (c) 2011, 2012, 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "route-table.h"
-#include <assert.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <linux/rtnetlink.h>
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
+/* Global change number for route-table, which should be incremented
+ * every time route_table_reset() is called. */
+static uint64_t rt_change_seq;
+
static unsigned int register_count = 0;
static struct nln *nln = NULL;
static struct route_table_msg rtmsg;
-static struct nln_notifier route_notifier;
-static struct nln_notifier name_notifier;
+static struct nln_notifier *route_notifier = NULL;
+static struct nln_notifier *name_notifier = NULL;
static bool route_table_valid = false;
static bool name_table_valid = false;
return false;
}
+uint64_t
+route_table_get_change_seq(void)
+{
+ return rt_change_seq;
+}
+
/* Users of the route_table module should register themselves with this
* function before making any other route_table function calls. */
void
route_table_register(void)
{
if (!register_count) {
- assert(!nln);
+ ovs_assert(!nln);
+ ovs_assert(!route_notifier);
nln = nln_create(NETLINK_ROUTE, RTNLGRP_IPV4_ROUTE,
(nln_parse_func *) route_table_parse, &rtmsg);
- nln_notifier_register(nln, &route_notifier,
- (nln_notify_func *) route_table_change, NULL);
+
+ route_notifier =
+ nln_notifier_create(nln, (nln_notify_func *) route_table_change,
+ NULL);
hmap_init(&route_map);
route_table_reset();
register_count--;
if (!register_count) {
+ nln_notifier_destroy(route_notifier);
+ route_notifier = NULL;
nln_destroy(nln);
nln = NULL;
if (nln) {
rtnetlink_link_run();
nln_run(nln);
+
+ if (!route_table_valid) {
+ route_table_reset();
+ }
}
}
static int
route_table_reset(void)
{
- int error;
struct nl_dump dump;
struct rtgenmsg *rtmsg;
- struct ofpbuf request, reply;
- static struct nl_sock *rtnl_sock;
+ uint64_t reply_stub[NL_DUMP_BUFSIZE / 8];
+ struct ofpbuf request, reply, buf;
route_map_clear();
route_table_valid = true;
-
- error = nl_sock_create(NETLINK_ROUTE, &rtnl_sock);
- if (error) {
- VLOG_WARN_RL(&rl, "failed to reset routing table, "
- "cannot create RTNETLINK_ROUTE socket");
- return error;
- }
+ rt_change_seq++;
ofpbuf_init(&request, 0);
rtmsg = ofpbuf_put_zeros(&request, sizeof *rtmsg);
rtmsg->rtgen_family = AF_INET;
- nl_dump_start(&dump, rtnl_sock, &request);
+ nl_dump_start(&dump, NETLINK_ROUTE, &request);
+ ofpbuf_uninit(&request);
- while (nl_dump_next(&dump, &reply)) {
+ ofpbuf_use_stub(&buf, reply_stub, sizeof reply_stub);
+ while (nl_dump_next(&dump, &reply, &buf)) {
struct route_table_msg msg;
if (route_table_parse(&reply, &msg)) {
route_table_handle_msg(&msg);
}
}
+ ofpbuf_uninit(&buf);
- error = nl_dump_done(&dump);
- nl_sock_destroy(rtnl_sock);
-
- return error;
+ return nl_dump_done(&dump);
}
[RTA_OIF] = { .type = NL_A_U32, .optional = false },
};
- static struct nlattr *attrs[ARRAY_SIZE(policy)];
+ struct nlattr *attrs[ARRAY_SIZE(policy)];
parsed = nl_policy_parse(buf, NLMSG_HDRLEN + sizeof(struct rtmsg),
policy, attrs, ARRAY_SIZE(policy));
const struct rtmsg *rtm;
const struct nlmsghdr *nlmsg;
- nlmsg = buf->data;
- rtm = (const struct rtmsg *) ((const char *) buf->data + NLMSG_HDRLEN);
+ nlmsg = ofpbuf_data(buf);
+ rtm = ofpbuf_at(buf, NLMSG_HDRLEN, sizeof *rtm);
if (rtm->rtm_family != AF_INET) {
VLOG_DBG_RL(&rl, "received non AF_INET rtnetlink route message");
name_table_init(void)
{
hmap_init(&name_map);
- rtnetlink_link_notifier_register(&name_notifier, name_table_change, NULL);
+ name_notifier = rtnetlink_link_notifier_create(name_table_change, NULL);
name_table_valid = false;
}
static void
name_table_uninit(void)
{
- rtnetlink_link_notifier_unregister(&name_notifier);
+ rtnetlink_link_notifier_destroy(name_notifier);
+ name_notifier = NULL;
name_map_clear();
hmap_destroy(&name_map);
}
static int
name_table_reset(void)
{
- int error;
struct nl_dump dump;
struct rtgenmsg *rtmsg;
- struct ofpbuf request, reply;
- static struct nl_sock *rtnl_sock;
+ uint64_t reply_stub[NL_DUMP_BUFSIZE / 8];
+ struct ofpbuf request, reply, buf;
name_table_valid = true;
name_map_clear();
- error = nl_sock_create(NETLINK_ROUTE, &rtnl_sock);
- if (error) {
- VLOG_WARN_RL(&rl, "failed to create NETLINK_ROUTE socket");
- return error;
- }
ofpbuf_init(&request, 0);
nl_msg_put_nlmsghdr(&request, sizeof *rtmsg, RTM_GETLINK, NLM_F_REQUEST);
rtmsg = ofpbuf_put_zeros(&request, sizeof *rtmsg);
rtmsg->rtgen_family = AF_INET;
- nl_dump_start(&dump, rtnl_sock, &request);
- while (nl_dump_next(&dump, &reply)) {
+ nl_dump_start(&dump, NETLINK_ROUTE, &request);
+ ofpbuf_uninit(&request);
+
+ ofpbuf_use_stub(&buf, reply_stub, sizeof reply_stub);
+ while (nl_dump_next(&dump, &reply, &buf)) {
struct rtnetlink_link_change change;
if (rtnetlink_link_parse(&reply, &change)
hmap_insert(&name_map, &nn->node, hash_int(nn->ifi_index, 0));
}
}
- nl_sock_destroy(rtnl_sock);
+ ofpbuf_uninit(&buf);
return nl_dump_done(&dump);
}