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| author | Eric Dumazet <edumazet@google.com> | 2023-12-12 14:55:50 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-12-13 18:30:24 -0800 |
| commit | 4746b36b1abe11ca32987b2d21e1e770deab17cc (patch) | |
| tree | 2bef321b162bf78c928ecd84867341f612ede33a /net/sctp | |
| parent | 36d8afbb2b89cdd4af1051d0a9afebb5511099df (diff) | |
| download | lwn-4746b36b1abe11ca32987b2d21e1e770deab17cc.tar.gz lwn-4746b36b1abe11ca32987b2d21e1e770deab17cc.zip | |
sctp: support MSG_ERRQUEUE flag in recvmsg()
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>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/socket.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 7f89e43154c0..5fb02bbb4b34 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -2099,6 +2099,9 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, pr_debug("%s: sk:%p, msghdr:%p, len:%zd, flags:0x%x, addr_len:%p)\n", __func__, sk, msg, len, flags, addr_len); + if (unlikely(flags & MSG_ERRQUEUE)) + return inet_recv_error(sk, msg, len, addr_len); + lock_sock(sk); if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) && |