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| author | Guillaume Nault <g.nault@alphalink.fr> | 2018-08-03 12:38:34 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-08-03 10:03:57 -0700 |
| commit | 1f5cd2a0107d4ed95cbd9118e6a5f7ccd3d4d12a (patch) | |
| tree | 1ee06be60cafbb3e7c7df779677842c976d5716d /net/l2tp/l2tp_eth.c | |
| parent | f3184645cb0409d4ab0e63d65a0adcb565f55df4 (diff) | |
| download | linux-1f5cd2a0107d4ed95cbd9118e6a5f7ccd3d4d12a.tar.gz linux-1f5cd2a0107d4ed95cbd9118e6a5f7ccd3d4d12a.tar.bz2 linux-1f5cd2a0107d4ed95cbd9118e6a5f7ccd3d4d12a.zip | |
l2tp: define l2tp_tunnel_dst_mtu()
Consolidate retrieval of tunnel's socket mtu in order to simplify
l2tp_eth and l2tp_ppp a bit.
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp/l2tp_eth.c')
| -rw-r--r-- | net/l2tp/l2tp_eth.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c index 5c366ecfa1cb..cfca5e63ae31 100644 --- a/net/l2tp/l2tp_eth.c +++ b/net/l2tp/l2tp_eth.c @@ -226,8 +226,8 @@ static void l2tp_eth_adjust_mtu(struct l2tp_tunnel *tunnel, struct net_device *dev) { unsigned int overhead = 0; - struct dst_entry *dst; u32 l3_overhead = 0; + u32 mtu; /* if the encap is UDP, account for UDP header size */ if (tunnel->encap == L2TP_ENCAPTYPE_UDP) { @@ -256,15 +256,9 @@ static void l2tp_eth_adjust_mtu(struct l2tp_tunnel *tunnel, overhead += session->hdr_len + ETH_HLEN + l3_overhead; /* If PMTU discovery was enabled, use discovered MTU on L2TP device */ - dst = sk_dst_get(tunnel->sock); - if (dst) { - /* dst_mtu will use PMTU if found, else fallback to intf MTU */ - u32 pmtu = dst_mtu(dst); - - if (pmtu != 0) - dev->mtu = pmtu; - dst_release(dst); - } + mtu = l2tp_tunnel_dst_mtu(tunnel); + if (mtu) + dev->mtu = mtu; session->mtu = dev->mtu - overhead; dev->mtu = session->mtu; dev->needed_headroom += session->hdr_len; |