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-rw-r--r--include/uapi/linux/tipc_config.h5
-rw-r--r--net/tipc/udp_media.c4
2 files changed, 7 insertions, 2 deletions
diff --git a/include/uapi/linux/tipc_config.h b/include/uapi/linux/tipc_config.h
index 3f29e3c8ed06..4b2c93b1934c 100644
--- a/include/uapi/linux/tipc_config.h
+++ b/include/uapi/linux/tipc_config.h
@@ -185,6 +185,11 @@
#define TIPC_DEF_LINK_WIN 50
#define TIPC_MAX_LINK_WIN 8191
+/*
+ * Default MTU for UDP media
+ */
+
+#define TIPC_DEF_LINK_UDP_MTU 14000
struct tipc_node_info {
__be32 addr; /* network address of node */
diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index e7d91f5d5cae..9783101bc4a9 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -713,8 +713,7 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
err = -EINVAL;
goto err;
}
- b->mtu = dev->mtu - sizeof(struct iphdr)
- - sizeof(struct udphdr);
+ b->mtu = b->media->mtu;
#if IS_ENABLED(CONFIG_IPV6)
} else if (local.proto == htons(ETH_P_IPV6)) {
udp_conf.family = AF_INET6;
@@ -803,6 +802,7 @@ struct tipc_media udp_media_info = {
.priority = TIPC_DEF_LINK_PRI,
.tolerance = TIPC_DEF_LINK_TOL,
.window = TIPC_DEF_LINK_WIN,
+ .mtu = TIPC_DEF_LINK_UDP_MTU,
.type_id = TIPC_MEDIA_TYPE_UDP,
.hwaddr_len = 0,
.name = "udp"