src: Support netdev egress hook

Add userspace support for the netdev egress hook which is queued up for
v5.16-rc1, complete with documentation and tests.  Usage is identical to
the ingress hook.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index feb6287c..9e078880 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -54,6 +54,7 @@ enum nf_inet_hooks {
 
 enum nf_dev_hooks {
 	NF_NETDEV_INGRESS,
+	NF_NETDEV_EGRESS,
 	NF_NETDEV_NUMHOOKS
 };