netdev - [RFC net-next af_unix v1 1/1] af_unix: Allow delivery of SIGURG on AF

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Date:   Thu,  8 Oct 2020 13:03:58 -0700
From:   rao.shoaib@...cle.com
To:     netdev@...r.kernel.org
Cc:     Rao Shoaib <rao.shoaib@...cle.com>
Subject: [RFC net-next af_unix v1 1/1] af_unix: Allow delivery of SIGURG on AF_UNIX streams socket

From: Rao Shoaib <rao.shoaib@...cle.com>

For AF_UNIX stream socket send SIGURG to the peer if
the msg has MSG_OOB flag set.

Signed-off-by: Rao Shoaib <rao.shoaib@...cle.com>
---
 net/unix/af_unix.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 92784e5..4f01d74 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1840,8 +1840,6 @@ static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg,
 		return err;
 
 	err = -EOPNOTSUPP;
-	if (msg->msg_flags&MSG_OOB)
-		goto out_err;
 
 	if (msg->msg_namelen) {
 		err = sk->sk_state == TCP_ESTABLISHED ? -EISCONN : -EOPNOTSUPP;
@@ -1906,6 +1904,9 @@ static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg,
 		sent += size;
 	}
 
+	if (msg->msg_flags & MSG_OOB)
+		sk_send_sigurg(other);
+
 	scm_destroy(&scm);
 
 	return sent;
-- 
1.8.3.1