On Tue, Mar 6, 2018 at 8:12 PM, Jesus Sanchez-Palencia <jesus.sanchez-palen...@intel.com> wrote: > From: Richard Cochran <rcoch...@linutronix.de> > > For udp packets, copy the desired future transmit time from the CMSG > cookie into the skb. > > Signed-off-by: Richard Cochran <rcoch...@linutronix.de> > Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palen...@intel.com> > --- > net/ipv4/udp.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c > index 3013404d0935..d683bbde526b 100644 > --- a/net/ipv4/udp.c > +++ b/net/ipv4/udp.c > @@ -926,6 +926,7 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, > size_t len) > } > > ipc.sockc.tsflags = sk->sk_tsflags; > + ipc.sockc.transmit_time = 0; > ipc.addr = inet->inet_saddr; > ipc.oif = sk->sk_bound_dev_if; > > @@ -1040,8 +1041,10 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, > size_t len) > sizeof(struct udphdr), &ipc, &rt, > msg->msg_flags); > err = PTR_ERR(skb); > - if (!IS_ERR_OR_NULL(skb)) > + if (!IS_ERR_OR_NULL(skb)) { > + skb->tstamp = ipc.sockc.transmit_time; > err = udp_send_skb(skb, fl4); > + }
similar comment to raw: this implements only for a subset of udp requests: those that can take the fast path.