From: Paolo Abeni <pabeni@redhat.com>
To: mptcp@lists.linux.dev
Subject: [PATCH net-next 1/3] mptcp: implement dummy MSG_ERRQUEUE support
Date: Thu, 15 Apr 2021 18:02:05 +0200 [thread overview]
Message-ID: <372f93e8d85570f897fd1801cb90f591ef478c2a.1618502178.git.pabeni@redhat.com> (raw)
In-Reply-To: <cover.1618502178.git.pabeni@redhat.com>
mptcp_recvmsg() currently silently ignores MSG_ERRQUEUE, returning
input data instead of error cmsg.
This change provides a dummy implementation for MSG_ERRQUEUE - always
returns no data. That is consistent with the current lack of a suitable
IP_RECVERR setsockopt() support.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
net/mptcp/protocol.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 0437fe4f0552..ed9ada31f2da 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1945,6 +1945,10 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int target;
long timeo;
+ /* MSG_ERRQUEUE is really a no-op till we support IP_RECVERR */
+ if (unlikely(flags & MSG_ERRQUEUE))
+ return inet_recv_error(sk, msg, len, addr_len);
+
if (msg->msg_flags & ~(MSG_WAITALL | MSG_DONTWAIT))
return -EOPNOTSUPP;
--
2.26.2
next prev parent reply other threads:[~2021-04-15 16:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-15 16:02 [PATCH net-next 0/3] mptcp: improve MSG_* flags handling Paolo Abeni
2021-04-15 16:02 ` Paolo Abeni [this message]
2021-04-15 16:02 ` [PATCH net-next 2/3] mptcp: implement MSG_TRUNC support Paolo Abeni
2021-04-15 16:02 ` [PATCH net-next 3/3] mptcp: ignore unsupported msg flags Paolo Abeni
2021-04-16 23:01 ` [PATCH net-next 0/3] mptcp: improve MSG_* flags handling Mat Martineau
2021-04-19 16:39 ` Matthieu Baerts
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=372f93e8d85570f897fd1801cb90f591ef478c2a.1618502178.git.pabeni@redhat.com \
--to=pabeni@redhat.com \
--cc=mptcp@lists.linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).