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authorDavid S. Miller <davem@sunset.davemloft.net>2007-03-06 17:02:35 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:23:35 -0700
commitb558ff799977a4eda8b3823d1cf6c1c33becb671 (patch)
treeb68b90c1891120e2904fd5b68d9192ef6ae74d43
parentb7aa0bf70c4afb9e38be25f5c0922498d0f8684c (diff)
[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 <davem@davemloft.net>
-rw-r--r--net/netlink/af_netlink.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index c48b0f49f00..5890210d773 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;