[PATCH net-next v2 v2 2/2] net: mctp: support MSG_ERRQUEUE in recvmsg()
From: Jian Zhang <hidden>
Date: 2026-01-16 09:00:57
Also in:
lkml
Subsystem:
management component transport protocol (mctp), networking [general], the rest · Maintainers:
Jeremy Kerr, Matt Johnston, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This enables userspace to retrieve struct sock_extended_err for locally detected transmit failures, using the standard socket error queue mechanism. At this point, only the generic errno information is reported. No MCTP-specific control messages or extended error details are provided. Signed-off-by: Jian Zhang <redacted> --- net/mctp/af_mctp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/mctp/af_mctp.c b/net/mctp/af_mctp.c
index 209a963112e3..353599812a0a 100644
--- a/net/mctp/af_mctp.c
+++ b/net/mctp/af_mctp.c@@ -291,9 +291,12 @@ static int mctp_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, u8 type; int rc; - if (flags & ~(MSG_DONTWAIT | MSG_TRUNC | MSG_PEEK)) + if (flags & ~(MSG_DONTWAIT | MSG_TRUNC | MSG_PEEK | MSG_ERRQUEUE)) return -EOPNOTSUPP; + if (flags & MSG_ERRQUEUE) + return sock_recv_errqueue(sk, msg, len, SOL_MCTP, 0); + skb = skb_recv_datagram(sk, flags, &rc); if (!skb) return rc;
--
2.20.1