Commit b558ff79 authored by David S. Miller's avatar David S. Miller
Browse files

[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: default avatarDavid S. Miller <>
parent b7aa0bf7
......@@ -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;
return err ? : copied;
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