diff options
| author | David Ahern <dsahern@gmail.com> | 2017-08-07 18:44:21 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-07 21:39:22 +0300 |
| commit | 4297a0ef085729af98adab9131d128c576ed3044 (patch) | |
| tree | 4514e23109aff1005bb066d732a64f340b3f6617 /include/net/tcp.h | |
| parent | 1801b570dd2ae50b90231f283e79a9a94fbe7875 (diff) | |
| download | linux-4297a0ef085729af98adab9131d128c576ed3044.tar.xz | |
net: ipv6: add second dif to inet6 socket lookups
Add a second device index, sdif, to inet6 socket lookups. sdif is the
index for ingress devices enslaved to an l3mdev. It allows the lookups
to consider the enslaved device as well as the L3 domain when searching
for a socket.
TCP moves the data in the cb. Prior to tcp_v4_rcv (e.g., early demux) the
ingress index is obtained from IPCB using inet_sdif and after tcp_v4_rcv
tcp_v4_sdif is used.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tcp.h')
| -rw-r--r-- | include/net/tcp.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 2b89f1ab8552..999f3efe572b 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -827,6 +827,16 @@ static inline int tcp_v6_iif(const struct sk_buff *skb) return l3_slave ? skb->skb_iif : TCP_SKB_CB(skb)->header.h6.iif; } + +/* TCP_SKB_CB reference means this can not be used from early demux */ +static inline int tcp_v6_sdif(const struct sk_buff *skb) +{ +#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) + if (skb && ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags)) + return TCP_SKB_CB(skb)->header.h6.iif; +#endif + return 0; +} #endif /* TCP_SKB_CB reference means this can not be used from early demux */ |