*/
#include <config.h>
-
-#include "netdev-linux.h"
-
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include "openflow/openflow.h"
#include "packets.h"
#include "poll-loop.h"
+#include "rtnetlink.h"
#include "socket-util.h"
#include "shash.h"
#include "svec.h"
};
static struct shash cache_map = SHASH_INITIALIZER(&cache_map);
-static struct linux_netdev_notifier netdev_linux_cache_notifier;
-
-/* Policy for RTNLGRP_LINK messages.
- *
- * There are *many* more fields in these messages, but currently we only care
- * about interface names. */
-static const struct nl_policy rtnlgrp_link_policy[] = {
- [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false },
- [IFLA_MASTER] = { .type = NL_A_U32, .optional = true },
- [IFLA_STATS] = { .type = NL_A_UNSPEC, .optional = true,
- .min_len = sizeof(struct rtnl_link_stats) },
-};
+static struct rtnetlink_notifier netdev_linux_cache_notifier;
/* An AF_INET socket (used for ioctl operations). */
static int af_inet_sock = -1;
static struct shash netdev_linux_notifiers =
SHASH_INITIALIZER(&netdev_linux_notifiers);
-static struct linux_netdev_notifier netdev_linux_poll_notifier;
+static struct rtnetlink_notifier netdev_linux_poll_notifier;
/* This is set pretty low because we probably won't learn anything from the
* additional log messages. */
static void
netdev_linux_run(void)
{
- linux_netdev_notifier_run();
+ rtnetlink_notifier_run();
}
static void
netdev_linux_wait(void)
{
- linux_netdev_notifier_wait();
+ rtnetlink_notifier_wait();
}
static void
-netdev_linux_cache_cb(const struct linux_netdev_change *change,
+netdev_linux_cache_cb(const struct rtnetlink_change *change,
void *aux UNUSED)
{
struct netdev_linux_cache *cache;
netdev->cache = shash_find_data(&cache_map, suffix);
if (!netdev->cache) {
if (shash_is_empty(&cache_map)) {
- int error = linux_netdev_notifier_register(
+ int error = rtnetlink_notifier_register(
&netdev_linux_cache_notifier, netdev_linux_cache_cb, NULL);
if (error) {
netdev_close(&netdev->netdev);
free(netdev->cache);
if (shash_is_empty(&cache_map)) {
- linux_netdev_notifier_unregister(&netdev_linux_cache_notifier);
+ rtnetlink_notifier_unregister(&netdev_linux_cache_notifier);
}
}
if (netdev->netdev_fd >= 0) {
}
static void
-netdev_linux_poll_cb(const struct linux_netdev_change *change,
+netdev_linux_poll_cb(const struct rtnetlink_change *change,
void *aux UNUSED)
{
if (change) {
struct list *list;
if (shash_is_empty(&netdev_linux_notifiers)) {
- int error = linux_netdev_notifier_register(&netdev_linux_poll_notifier,
+ int error = rtnetlink_notifier_register(&netdev_linux_poll_notifier,
netdev_linux_poll_cb, NULL);
if (error) {
return error;
/* If that was the last notifier, unregister. */
if (shash_is_empty(&netdev_linux_notifiers)) {
- linux_netdev_notifier_unregister(&netdev_linux_poll_notifier);
+ rtnetlink_notifier_unregister(&netdev_linux_poll_notifier);
}
}
static int
get_stats_via_netlink(int ifindex, struct netdev_stats *stats)
{
+ /* Policy for RTNLGRP_LINK messages.
+ *
+ * There are *many* more fields in these messages, but currently we only
+ * care about these fields. */
+ static const struct nl_policy rtnlgrp_link_policy[] = {
+ [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false },
+ [IFLA_STATS] = { .type = NL_A_UNSPEC, .optional = true,
+ .min_len = sizeof(struct rtnl_link_stats) },
+ };
+
+
static struct nl_sock *rtnl_sock;
struct ofpbuf request;
struct ofpbuf *reply;
}
return 0;
}
-\f
-/* rtnetlink socket. */
-static struct nl_sock *notify_sock;
-
-/* All registered notifiers. */
-static struct list all_notifiers = LIST_INITIALIZER(&all_notifiers);
-
-static void linux_netdev_report_change(const struct nlmsghdr *,
- const struct ifinfomsg *,
- struct nlattr *attrs[]);
-static void linux_netdev_report_notify_error(void);
-
-int
-linux_netdev_notifier_register(struct linux_netdev_notifier *notifier,
- linux_netdev_notify_func *cb, void *aux)
-{
- if (!notify_sock) {
- int error = nl_sock_create(NETLINK_ROUTE, RTNLGRP_LINK, 0, 0,
- ¬ify_sock);
- if (error) {
- VLOG_WARN("could not create rtnetlink socket: %s",
- strerror(error));
- return error;
- }
- } else {
- /* Catch up on notification work so that the new notifier won't
- * receive any stale notifications. */
- linux_netdev_notifier_run();
- }
-
- list_push_back(&all_notifiers, ¬ifier->node);
- notifier->cb = cb;
- notifier->aux = aux;
- return 0;
-}
-
-void
-linux_netdev_notifier_unregister(struct linux_netdev_notifier *notifier)
-{
- list_remove(¬ifier->node);
- if (list_is_empty(&all_notifiers)) {
- nl_sock_destroy(notify_sock);
- notify_sock = NULL;
- }
-}
-
-void
-linux_netdev_notifier_run(void)
-{
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
-
- if (!notify_sock) {
- return;
- }
-
- for (;;) {
- struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)];
- struct ofpbuf *buf;
- int error;
-
- error = nl_sock_recv(notify_sock, &buf, false);
- if (!error) {
- if (nl_policy_parse(buf, NLMSG_HDRLEN + sizeof(struct ifinfomsg),
- rtnlgrp_link_policy,
- attrs, ARRAY_SIZE(rtnlgrp_link_policy))) {
- struct ifinfomsg *ifinfo;
-
- ifinfo = (void *) ((char *) buf->data + NLMSG_HDRLEN);
- linux_netdev_report_change(buf->data, ifinfo, attrs);
- } else {
- VLOG_WARN_RL(&rl, "received bad rtnl message");
- linux_netdev_report_notify_error();
- }
- ofpbuf_delete(buf);
- } else if (error == EAGAIN) {
- return;
- } else {
- if (error == ENOBUFS) {
- VLOG_WARN_RL(&rl, "rtnetlink receive buffer overflowed");
- } else {
- VLOG_WARN_RL(&rl, "error reading rtnetlink socket: %s",
- strerror(error));
- }
- linux_netdev_report_notify_error();
- }
- }
-}
-
-void
-linux_netdev_notifier_wait(void)
-{
- if (notify_sock) {
- nl_sock_wait(notify_sock, POLLIN);
- }
-}
-
-static void
-linux_netdev_report_change(const struct nlmsghdr *nlmsg,
- const struct ifinfomsg *ifinfo,
- struct nlattr *attrs[])
-{
- struct linux_netdev_notifier *notifier;
- struct linux_netdev_change change;
-
- COVERAGE_INC(linux_netdev_changed);
-
- change.nlmsg_type = nlmsg->nlmsg_type;
- change.ifi_index = ifinfo->ifi_index;
- change.ifname = nl_attr_get_string(attrs[IFLA_IFNAME]);
- change.master_ifindex = (attrs[IFLA_MASTER]
- ? nl_attr_get_u32(attrs[IFLA_MASTER]) : 0);
-
- LIST_FOR_EACH (notifier, struct linux_netdev_notifier, node,
- &all_notifiers) {
- notifier->cb(&change, notifier->aux);
- }
-}
-
-static void
-linux_netdev_report_notify_error(void)
-{
- struct linux_netdev_notifier *notifier;
-
- LIST_FOR_EACH (notifier, struct linux_netdev_notifier, node,
- &all_notifiers) {
- notifier->cb(NULL, notifier->aux);
- }
-}
projects / openvswitch / blobdiff