Eric Dumazet 9702e7fb63 sctp: support MSG_ERRQUEUE flag in recvmsg()
[ Upstream commit 4746b36b1abe11ca32987b2d21e1e770deab17cc ]

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>
Stable-dep-of: a562c0a2d651 ("sctp: fix busy polling")
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-01-25 15:35:30 -08:00
..
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