Jason Xing wrote: > Support sw SCM_TSTAMP_SND case for bpf timestamping. > > Add a new sock_ops callback, BPF_SOCK_OPS_TS_SW_OPT_CB. This > callback will occur at the same timestamping point as the user > space's software SCM_TSTAMP_SND. The BPF program can use it to > get the same SCM_TSTAMP_SND timestamp without modifying the > user-space application. > > Based on this patch, BPF program will get the software > timestamp when the driver is ready to send the skb. In the > sebsequent patch, the hardware timestamp will be supported. > > Signed-off-by: Jason Xing <kerneljasonxing@xxxxxxxxx> Reviewed-by: Willem de Bruijn <willemb@xxxxxxxxxx>
