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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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14
net/tipc/udp_media.h
View File

@@ -38,9 +38,23 @@
#ifndef _TIPC_UDP_MEDIA_H
#define _TIPC_UDP_MEDIA_H
#include <linux/ip.h>
#include <linux/udp.h>
int tipc_udp_nl_bearer_add(struct tipc_bearer *b, struct nlattr *attr);
int tipc_udp_nl_add_bearer_data(struct tipc_nl_msg *msg, struct tipc_bearer *b);
int tipc_udp_nl_dump_remoteip(struct sk_buff *skb, struct netlink_callback *cb);
/* check if configured MTU is too low for tipc headers */
static inline bool tipc_udp_mtu_bad(u32 mtu)
{
if (mtu >= (TIPC_MIN_BEARER_MTU + sizeof(struct iphdr) +
sizeof(struct udphdr)))
return false;
pr_warn("MTU too low for tipc bearer\n");
return true;
}
#endif
#endif