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ss: output dctcp diag information 

Dump useful DCTCP state/debug information gathered from diag.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
This commit is contained in:
Daniel Borkmann 2014-09-29 10:47:32 +02:00 committed by Stephen Hemminger
parent dddfc7f67e
commit 907e1aca5f
1 changed files with 13 additions and 0 deletions
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13
misc/ss.c
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@ -1578,6 +1578,19 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
rtt = vinfo->tcpv_rtt;
}
if (tb[INET_DIAG_DCTCPINFO]) {
const struct tcp_dctcp_info *dinfo
= RTA_DATA(tb[INET_DIAG_DCTCPINFO]);
if (dinfo->dctcp_enabled) {
printf(" ce_state %u alpha %u ab_ecn %u ab_tot %u",
dinfo->dctcp_ce_state, dinfo->dctcp_alpha,
dinfo->dctcp_ab_ecn, dinfo->dctcp_ab_tot);
} else {
printf(" fallback_mode");
}
}
if (rtt > 0 && info->tcpi_snd_mss && info->tcpi_snd_cwnd) {
printf(" send %sbps",
sprint_bw(b1, (double) info->tcpi_snd_cwnd *