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tcp: add pacing_rate information into tcp_info 

Add two new fields to struct tcp_info, to report sk_pacing_rate
and sk_max_pacing_rate to monitoring applications, as ss from iproute2.

User exported fields are 64bit, even if kernel is currently using 32bit
fields.

lpaa5:~# ss -i
..
	 skmem:(r0,rb357120,t0,tb2097152,f1584,w1980880,o0,bl0) ts sack cubic
wscale:6,6 rto:400 rtt:0.875/0.75 mss:1448 cwnd:1 ssthresh:12 send
13.2Mbps pacing_rate 3336.2Mbps unacked:15 retrans:1/5448 lost:15
rcv_space:29200

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2014-02-13 14:27:40 -08:00 committed by David S. Miller
parent 1c213bd24a
commit 977cb0ecf8
2 changed files with 8 additions and 0 deletions
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3
include/uapi/linux/tcp.h
View File

@ -186,6 +186,9 @@ struct tcp_info {
__u32 tcpi_rcv_space;
__u32 tcpi_total_retrans;
__u64 tcpi_pacing_rate;
__u64 tcpi_max_pacing_rate;
};
/* for TCP_MD5SIG socket option */

5
net/ipv4/tcp.c
View File

@ -2794,6 +2794,11 @@ void tcp_get_info(const struct sock *sk, struct tcp_info *info)
info->tcpi_rcv_space = tp->rcvq_space.space;
info->tcpi_total_retrans = tp->total_retrans;
info->tcpi_pacing_rate = sk->sk_pacing_rate != ~0U ?
sk->sk_pacing_rate : ~0ULL;
info->tcpi_max_pacing_rate = sk->sk_max_pacing_rate != ~0U ?
sk->sk_max_pacing_rate : ~0ULL;
}
EXPORT_SYMBOL_GPL(tcp_get_info);