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| author | Paolo Abeni <pabeni@redhat.com> | 2021-04-23 20:17:05 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-04-23 23:06:32 +0200 |
| commit | cb9d80f4940ee5d4b7c7cad7418a6c893c6c4279 (patch) | |
| tree | 4a8f8fe7df68ca0dff93faaf7f32819168535cab /net/mptcp/protocol.c | |
| parent | Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/n... (diff) | |
| download | linux-cb9d80f4940ee5d4b7c7cad7418a6c893c6c4279.tar.xz linux-cb9d80f4940ee5d4b7c7cad7418a6c893c6c4279.zip | |
mptcp: implement dummy MSG_ERRQUEUE support
mptcp_recvmsg() currently silently ignores MSG_ERRQUEUE, returning
input data instead of error cmsg.
This change provides a dummy implementation for MSG_ERRQUEUE - always
returns no data. That is consistent with the current lack of a suitable
IP_RECVERR setsockopt() support.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp/protocol.c')
| -rw-r--r-- | net/mptcp/protocol.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index c14ac2975736..1d5f23bd640c 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1945,6 +1945,10 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int target; long timeo; + /* MSG_ERRQUEUE is really a no-op till we support IP_RECVERR */ + if (unlikely(flags & MSG_ERRQUEUE)) + return inet_recv_error(sk, msg, len, addr_len); + if (msg->msg_flags & ~(MSG_WAITALL | MSG_DONTWAIT)) return -EOPNOTSUPP; |