This change introduces the netlink commands needed to add, delete and
swap keys for a specific peer.

Userspace is expected to use these commands to create, destroy and
rotate session keys for a specific peer.

Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
---
 Documentation/netlink/specs/ovpn.yaml |   2 +-
 drivers/net/ovpn/netlink-gen.c        |   2 +-
 drivers/net/ovpn/netlink.c            | 199 +++++++++++++++++++++++++-
 3 files changed, 198 insertions(+), 5 deletions(-)

diff --git a/Documentation/netlink/specs/ovpn.yaml b/Documentation/netlink/specs/ovpn.yaml
index 68ed88d03732..21c89f0bdcbb 100644
--- a/Documentation/netlink/specs/ovpn.yaml
+++ b/Documentation/netlink/specs/ovpn.yaml

@@ -153,7 +153,7 @@ attribute-sets:
           decryption
         type: u32
         checks:
-          max: 2
+          max: 7