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net/sched: act_tunnel_key: add support for "don't fragment"

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extend "act_tunnel_key" to allow specifying TUNNEL_DONT_FRAGMENT.

Suggested-by: Ilya Maximets <i.maximets@ovn.org>
Reviewed-by: Pedro Tammela <pctammela@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Davide Caratti 2023-03-29 11:54:52 +02:00 committed by Jakub Kicinski
parent 46e9acb7ae
commit 2384127e98
2 changed files with 6 additions and 0 deletions
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1
include/uapi/linux/tc_act/tc_tunnel_key.h
View File

@ -34,6 +34,7 @@ enum {
*/
TCA_TUNNEL_KEY_ENC_TOS, /* u8 */
TCA_TUNNEL_KEY_ENC_TTL, /* u8 */
TCA_TUNNEL_KEY_NO_FRAG, /* flag */
__TCA_TUNNEL_KEY_MAX,
};

5
net/sched/act_tunnel_key.c
View File

@ -420,6 +420,9 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
flags &= ~TUNNEL_CSUM;
if (nla_get_flag(tb[TCA_TUNNEL_KEY_NO_FRAG]))
flags |= TUNNEL_DONT_FRAGMENT;
if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
@ -747,6 +750,8 @@ static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
key->tp_dst)) ||
nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
!(key->tun_flags & TUNNEL_CSUM)) ||
((key->tun_flags & TUNNEL_DONT_FRAGMENT) &&
nla_put_flag(skb, TCA_TUNNEL_KEY_NO_FRAG)) ||
tunnel_key_opts_dump(skb, info))
goto nla_put_failure;