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sctp: support MSG_ERRQUEUE flag in recvmsg()

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For some reason sctp_poll() generates EPOLLERR if sk->sk_error_queue
is not empty but recvmsg() can not drain the error queue yet.

This is needed to better support timestamping.

I had to export inet_recv_error(), since sctp
can be compiled as a module.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Cc: Willem de Bruijn <willemb@google.com>
Acked-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/20231212145550.3872051-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet
2023-12-12 14:55:50 +00:00
committed by Jakub Kicinski
parent 36d8afbb2b
commit 4746b36b1a
2 changed files with 4 additions and 0 deletions
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1
net/ipv4/af_inet.c
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@@ -1633,6 +1633,7 @@ int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
#endif
return -EINVAL;
}
EXPORT_SYMBOL(inet_recv_error);
int inet_gro_complete(struct sk_buff *skb, int nhoff)
{