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tipc: implement configuration of UDP media MTU

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In previous commit, we changed the default emulated MTU for UDP bearers
to 14k.

This commit adds the functionality to set/change the default value
by configuring new MTU for UDP media. UDP bearer(s) have to be disabled
and enabled back for the new MTU to take effect.

Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: GhantaKrishnamurthy MohanKrishna <mohan.krishna.ghanta.krishnamurthy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
GhantaKrishnamurthy MohanKrishna
2018-04-19 11:06:19 +02:00
committed by David S. Miller
parent a4dfa72d0a
commit 901271e040
4 changed files with 31 additions and 0 deletions
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13
net/tipc/bearer.c
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@@ -1029,6 +1029,9 @@ static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
goto prop_msg_full;
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
goto prop_msg_full;
if (media->type_id == TIPC_MEDIA_TYPE_UDP)
if (nla_put_u32(msg->skb, TIPC_NLA_PROP_MTU, media->mtu))
goto prop_msg_full;
nla_nest_end(msg->skb, prop);
nla_nest_end(msg->skb, attrs);
@@ -1158,6 +1161,16 @@ int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
if (props[TIPC_NLA_PROP_WIN])
m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
if (props[TIPC_NLA_PROP_MTU]) {
if (m->type_id != TIPC_MEDIA_TYPE_UDP)
return -EINVAL;
#ifdef CONFIG_TIPC_MEDIA_UDP
if (tipc_udp_mtu_bad(nla_get_u32
(props[TIPC_NLA_PROP_MTU])))
return -EINVAL;
m->mtu = nla_get_u32(props[TIPC_NLA_PROP_MTU]);
#endif
}
}
return 0;