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netdev-linux: Check notifications are for netdev-linux device.

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When receiving a change notification from rtnetlink we checked whether
a netdev of that name existed and if so tried to handle it.  This also
checks that the type of the device is one handled by netdev-linux.
This commit is contained in:
Jesse Gross
2010-03-30 18:39:20 -04:00
parent 2736b84e23
commit 15b3596a41
3 changed files with 29 additions and 8 deletions
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29
lib/netdev-linux.c
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@@ -157,6 +157,7 @@ static struct rtnetlink_notifier netdev_linux_poll_notifier;
* additional log messages. */
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
static int netdev_linux_init(void);
static int if_up(const char *name);
static int destroy_gre(const char *name);
static int netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *,
@@ -178,21 +179,28 @@ static int set_etheraddr(const char *netdev_name, int hwaddr_family,
static int get_stats_via_netlink(int ifindex, struct netdev_stats *stats);
static int get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats);
static bool
is_netdev_linux_class(const struct netdev_class *netdev_class)
{
return netdev_class->init == netdev_linux_init;
}
static struct netdev_dev_linux *
netdev_dev_linux_cast(const struct netdev_dev *netdev_dev)
{
const char *type = netdev_dev_get_type(netdev_dev);
assert(!strcmp(type, "system") || !strcmp(type, "tap")
|| !strcmp(type, "gre") || !strcmp(type, "patch"));
const struct netdev_class *netdev_class = netdev_dev_get_class(netdev_dev);
assert(is_netdev_linux_class(netdev_class));
return CONTAINER_OF(netdev_dev, struct netdev_dev_linux, netdev_dev);
}
static struct netdev_linux *
netdev_linux_cast(const struct netdev *netdev)
{
const char *type = netdev_get_type(netdev);
assert(!strcmp(type, "system") || !strcmp(type, "tap")
|| !strcmp(type, "gre") || !strcmp(type, "patch"));
struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
const struct netdev_class *netdev_class = netdev_dev_get_class(netdev_dev);
assert(is_netdev_linux_class(netdev_class));
return CONTAINER_OF(netdev, struct netdev_linux, netdev);
}
@@ -230,8 +238,13 @@ netdev_linux_cache_cb(const struct rtnetlink_change *change,
if (change) {
struct netdev_dev *base_dev = netdev_dev_from_name(change->ifname);
if (base_dev) {
dev = netdev_dev_linux_cast(base_dev);
dev->cache_valid = 0;
const struct netdev_class *netdev_class =
netdev_dev_get_class(base_dev);
if (is_netdev_linux_class(netdev_class)) {
dev = netdev_dev_linux_cast(base_dev);
dev->cache_valid = 0;
}
}
} else {
struct shash device_shash;