From b558ff799977a4eda8b3823d1cf6c1c33becb671 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 6 Mar 2007 17:02:35 -0800 Subject: [PATCH] [NETLINK]: Mirror UDP MSG_TRUNC semantics. If the user passes MSG_TRUNC in via msg_flags, return the full packet size not the truncated size. Idea from Herbert Xu and Thomas Graf. Signed-off-by: David S. Miller --- net/netlink/af_netlink.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index c48b0f49f003..5890210d7730 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1242,6 +1242,9 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock, scm_recv(sock, msg, siocb->scm, flags); + if (flags & MSG_TRUNC) + copied = skb->len; + out: netlink_rcv_wake(sk); return err ? : copied; -- 2.30.2