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authorDavid Ahern <dsahern@gmail.com>2019-05-22 22:04:42 +0300
committerDavid S. Miller <davem@davemloft.net>2019-05-23 03:48:44 +0300
commit1bff1a0c9bbda06f1646030082123baf23ea8e7f (patch)
tree8407b2b1019025608d1e40d9b2b555229b76e6c4 /include/net/ip_fib.h
parent19a3b7eea42402accf52bcb9ddb51bfdb4d7a13b (diff)
downloadlinux-1bff1a0c9bbda06f1646030082123baf23ea8e7f.tar.xz
ipv4: Add function to send route updates
Add fib_info_notify_update to walk the fib and send RTM_NEWROUTE notifications with NLM_F_REPLACE set for entries linked to a fib_info that have nh_updated flag set. This helper will be used by the nexthop code to notify userspace of routes that are impacted when a nexthop config is updated via replace. The new function and its helper are similar to how fib_flush and fib_table_flush work for address delete and link down events. This notification is needed for legacy apps that do not understand the new nexthop object. Apps that are nexthop aware can use the RTA_NH_ID attribute in the route notification to just ignore it. In the future this should be wrapped in a sysctl to allow OS'es that are fully updated to avoid the notificaton storm. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip_fib.h')
-rw-r--r--include/net/ip_fib.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index d0e28f4ab099..ec6496c08f48 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -150,6 +150,7 @@ struct fib_info {
#define fib_advmss fib_metrics->metrics[RTAX_ADVMSS-1]
int fib_nhs;
bool fib_nh_is_v6;
+ bool nh_updated;
struct rcu_head rcu;
struct fib_nh fib_nh[0];
#define fib_dev fib_nh[0].fib_nh_dev
@@ -231,6 +232,7 @@ int call_fib4_notifiers(struct net *net, enum fib_event_type event_type,
int __net_init fib4_notifier_init(struct net *net);
void __net_exit fib4_notifier_exit(struct net *net);
+void fib_info_notify_update(struct net *net, struct nl_info *info);
void fib_notify(struct net *net, struct notifier_block *nb);
struct fib_table {