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| author | GhantaKrishnamurthy MohanKrishna <mohan.krishna.ghanta.krishnamurthy@ericsson.com> | 2018-04-19 11:06:19 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-20 17:04:05 +0200 |
| commit | 901271e0403af638c224987c2a4e55cebade7e91 (patch) | |
| tree | c1d76383cebfd75ca87fb49ef212ee9c90f174e0 /net/tipc/udp_media.h | |
| parent | tipc: set default MTU for UDP media (diff) | |
| download | linux-901271e0403af638c224987c2a4e55cebade7e91.tar.xz linux-901271e0403af638c224987c2a4e55cebade7e91.zip | |
tipc: implement configuration of UDP media MTU
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>
Diffstat (limited to '')
| -rw-r--r-- | net/tipc/udp_media.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/net/tipc/udp_media.h b/net/tipc/udp_media.h index 281bbae87726..e7455cc73e16 100644 --- a/net/tipc/udp_media.h +++ b/net/tipc/udp_media.h @@ -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 |