sctp: support MSG_ERRQUEUE flag in recvmsg()

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[ Upstream commit 4746b36b1a ]

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: a562c0a2d6 ("sctp: fix busy polling")
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Eric Dumazet 2023-12-12 14:55:50 +00:00 • committed by Greg Kroah-Hartman

parent 3c0bd2b066

commit 9233a88f4b

2 changed files with 4 additions and 0 deletions

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1

net/ipv4/af_inet.c

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3

net/sctp/socket.c

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