On Tue, Aug 22, 2017 at 5:08 PM, Mike Maloney <maloneyker...@gmail.com> wrote: > From: Mike Maloney <malo...@google.com> > > When SOF_TIMESTAMPING_RX_SOFTWARE is enabled for tcp sockets, return the > timestamp corresponding to the highest sequence number data returned. > > Previously the skb->tstamp is overwritten when a TCP packet is placed > in the out of order queue. While the packet is in the ooo queue, save the > timestamp in the TCB_SKB_CB. This space is shared with the gso_* > options which are only used on the tx path, and a previously unused 4 > byte hole. > > When skbs are coalesced either in the sk_receive_queue or the > out_of_order_queue always choose the timestamp of the appended skb to > maintain the invariant of returning the timestamp of the last byte in > the recvmsg buffer. > > Signed-off-by: Mike Maloney <malo...@google.com>
Acked-by: Willem de Bruijn <will...@google.com>
