diff options
| author | Xin Long <lucien.xin@gmail.com> | 2023-05-14 15:52:27 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-05-15 10:21:20 +0100 |
| commit | 3ae6d66b605be604644d4bb5708a7ffd9cf1abe8 (patch) | |
| tree | 852a58a81d9f9746e4d7b8e98b379d46c90f0cce /net/tipc/bearer.c | |
| parent | b48a18644046c9bc0667493a147dfa01e8241eab (diff) | |
tipc: add tipc_bearer_min_mtu to calculate min mtu
As different media may requires different min mtu, and even the
same media with different net family requires different min mtu,
add tipc_bearer_min_mtu() to calculate min mtu accordingly.
This API will be used to check the new mtu when doing the link
mtu negotiation in the next patch.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/bearer.c')
| -rw-r--r-- | net/tipc/bearer.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 35cac7733fd3..0e9a29e1536b 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -541,6 +541,19 @@ int tipc_bearer_mtu(struct net *net, u32 bearer_id) return mtu; } +int tipc_bearer_min_mtu(struct net *net, u32 bearer_id) +{ + int mtu = TIPC_MIN_BEARER_MTU; + struct tipc_bearer *b; + + rcu_read_lock(); + b = bearer_get(net, bearer_id); + if (b) + mtu += b->encap_hlen; + rcu_read_unlock(); + return mtu; +} + /* tipc_bearer_xmit_skb - sends buffer to destination over bearer */ void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, |