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| author | Paolo Abeni <pabeni@redhat.com> | 2018-11-07 12:38:30 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-11-07 16:23:04 -0800 |
| commit | bcd1665e3569b0a6f569514f023a41fc7df0b4a3 (patch) | |
| tree | 4e28d9a2711bdfa1069efdfb49350ede0e1d97f7 /include/linux | |
| parent | e20cf8d3f1f763ad28a9cb3b41305b8a8a42653e (diff) | |
| download | lwn-bcd1665e3569b0a6f569514f023a41fc7df0b4a3.tar.gz lwn-bcd1665e3569b0a6f569514f023a41fc7df0b4a3.zip | |
udp: add support for UDP_GRO cmsg
When UDP GRO is enabled, the UDP_GRO cmsg will carry the ingress
datagram size. User-space can use such info to compute the original
packets layout.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/udp.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/udp.h b/include/linux/udp.h index f613b329852e..e23d5024f42f 100644 --- a/include/linux/udp.h +++ b/include/linux/udp.h @@ -121,6 +121,17 @@ static inline bool udp_get_no_check6_rx(struct sock *sk) return udp_sk(sk)->no_check6_rx; } +static inline void udp_cmsg_recv(struct msghdr *msg, struct sock *sk, + struct sk_buff *skb) +{ + int gso_size; + + if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { + gso_size = skb_shinfo(skb)->gso_size; + put_cmsg(msg, SOL_UDP, UDP_GRO, sizeof(gso_size), &gso_size); + } +} + #define udp_portaddr_for_each_entry(__sk, list) \ hlist_for_each_entry(__sk, list, __sk_common.skc_portaddr_node) |