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tcp: add ca_state stat in SCM_TIMESTAMPING_OPT_STATS 

This patch adds TCP_NLA_CA_STATE stat into SCM_TIMESTAMPING_OPT_STATS.
It reports ca_state of socket, when timestamp is generated.

Signed-off-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Priyaranjan Jha 2018-03-04 10:38:36 -08:00 committed by David S. Miller
parent 87ecc95d81
commit be63189294
2 changed files with 3 additions and 1 deletions
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1
include/uapi/linux/tcp.h
View File

@ -242,6 +242,7 @@ enum {
TCP_NLA_RECUR_RETRANS, /* Recurring retransmits for the current pkt */
TCP_NLA_DELIVERY_RATE_APP_LMT, /* delivery rate application limited ? */
TCP_NLA_SNDQ_SIZE, /* Data (bytes) pending in send queue */
TCP_NLA_CA_STATE, /* ca_state of socket */
};

3
net/ipv4/tcp.c
View File

@ -3032,7 +3032,7 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk)
stats = alloc_skb(7 * nla_total_size_64bit(sizeof(u64)) +
4 * nla_total_size(sizeof(u32)) +
2 * nla_total_size(sizeof(u8)), GFP_ATOMIC);
3 * nla_total_size(sizeof(u8)), GFP_ATOMIC);
if (!stats)
return NULL;
@ -3063,6 +3063,7 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk)
nla_put_u8(stats, TCP_NLA_DELIVERY_RATE_APP_LMT, !!tp->rate_app_limited);
nla_put_u32(stats, TCP_NLA_SNDQ_SIZE, tp->write_seq - tp->snd_una);
nla_put_u8(stats, TCP_NLA_CA_STATE, inet_csk(sk)->icsk_ca_state);
return stats;
}