On 11/28/2018 04:01 PM, Stephen Hemminger wrote:

On Mon, 26 Nov 2018 14:29:53 -0800
Eric Dumazet [off-list ref] wrote:

quoted

Kernel support was added in linux-4.18 in commit feb5f2ec6464
("tcp: export packets delivery info")

Tested:

ss -ti
...
ESTAB   0 2270520      [2607:f8b0:8099:e16::]:47646   [2607:f8b0:8099:e18::]:38953
	 ts sack cubic wscale:8,8 rto:7 rtt:2.824/0.278 mss:1428
     pmtu:1500 rcvmss:536 advmss:1428 cwnd:89 ssthresh:62 bytes_acked:2097871945
    segs_out:1469144 segs_in:65221 data_segs_out:1469142 send 360.0Mbps lastsnd:2
    lastrcv:99231 lastack:2 pacing_rate 431.9Mbps delivery_rate 246.4Mbps
(*) delivered:1469099 delivered_ce:424799
    busy:99231ms unacked:44 rcv_space:14280 rcv_ssthresh:65535
    notsent:2207688 minrtt:0.228

Signed-off-by: Eric Dumazet <edumazet@google.com>

Applied

Thanks Stephen

BTW, it seems ss had some recent regression :

Old ss command was happy with "ss dst 127.0.0.1 and not dst :12865"

But current one is not.

root@edumazet-glaptop:/usr/src/iproute2# ss -V
ss utility, iproute2-ss171113

root@edumazet-glaptop:/usr/src/iproute2# ss dst 127.0.0.1 and not dst :12865
Netid  State      Recv-Q Send-Q                        Local Address:Port                                         Peer Address:Port                
tcp    ESTAB      0      0                                 127.0.0.1:45368                                           127.0.0.1:999                  
tcp    ESTAB      0      0                                 127.0.0.1:999                                             127.0.0.1:45368   

             
root@edumazet-glaptop:/usr/src/iproute2# misc/ss -V
ss utility, iproute2-ss181023

root@edumazet-glaptop:/usr/src/iproute2# misc/ss dst 127.0.0.1 and not dst :12865
ss: bison bellows (while parsing filter): "syntax error!" Sorry.
Usage: ss [ OPTIONS ]
       ss [ OPTIONS ] [ FILTER ]
...