diff options
| author | Willem de Bruijn <willemb@google.com> | 2014-11-26 14:53:02 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-11-26 15:45:04 -0500 |
| commit | f4713a3dfad045d46afcb9c2a7d0bba288920ed4 (patch) | |
| tree | de3059b95872e46370f0d61348044b6cb2b5981b /net/ipv4 | |
| parent | a7650238a0cf82d84d1d7aff4383f84807616d8f (diff) | |
| download | linux-f4713a3dfad045d46afcb9c2a7d0bba288920ed4.tar.bz2 | |
net-timestamp: make tcp_recvmsg call ipv6_recv_error for AF_INET6 socks
TCP timestamping introduced MSG_ERRQUEUE handling for TCP sockets.
If the socket is of family AF_INET6, call ipv6_recv_error instead
of ip_recv_error.
This change is more complex than a single branch due to the loadable
ipv6 module. It reuses a pre-existing indirect function call from
ping. The ping code is safe to call, because it is part of the core
ipv6 module and always present when AF_INET6 sockets are active.
Fixes: 4ed2d765 (net-timestamp: TCP timestamping)
Signed-off-by: Willem de Bruijn <willemb@google.com>
----
It may also be worthwhile to add WARN_ON_ONCE(sk->family == AF_INET6)
to ip_recv_error.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/af_inet.c | 11 | ||||
| -rw-r--r-- | net/ipv4/ping.c | 12 | ||||
| -rw-r--r-- | net/ipv4/tcp.c | 2 |
3 files changed, 14 insertions, 11 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 8b7fe5b03906..e67da4e6c324 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1386,6 +1386,17 @@ out: return pp; } +int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) +{ + if (sk->sk_family == AF_INET) + return ip_recv_error(sk, msg, len, addr_len); +#if IS_ENABLED(CONFIG_IPV6) + if (sk->sk_family == AF_INET6) + return pingv6_ops.ipv6_recv_error(sk, msg, len, addr_len); +#endif + return -EINVAL; +} + static int inet_gro_complete(struct sk_buff *skb, int nhoff) { __be16 newlen = htons(skb->len - nhoff); diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 85a02a75ad83..5d740cccf69e 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -855,16 +855,8 @@ int ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, if (flags & MSG_OOB) goto out; - if (flags & MSG_ERRQUEUE) { - if (family == AF_INET) { - return ip_recv_error(sk, msg, len, addr_len); -#if IS_ENABLED(CONFIG_IPV6) - } else if (family == AF_INET6) { - return pingv6_ops.ipv6_recv_error(sk, msg, len, - addr_len); -#endif - } - } + if (flags & MSG_ERRQUEUE) + return inet_recv_error(sk, msg, len, addr_len); skb = skb_recv_datagram(sk, flags, noblock, &err); if (!skb) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 39ec0c379545..38c2bcb8dd5d 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1598,7 +1598,7 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, u32 urg_hole = 0; if (unlikely(flags & MSG_ERRQUEUE)) - return ip_recv_error(sk, msg, len, addr_len); + return inet_recv_error(sk, msg, len, addr_len); if (sk_can_busy_loop(sk) && skb_queue_empty(&sk->sk_receive_queue) && (sk->sk_state == TCP_ESTABLISHED)) |