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tcp: add send queue size stat in SCM_TIMESTAMPING_OPT_STATS

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This patch adds TCP_NLA_SENDQ_SIZE stat into SCM_TIMESTAMPING_OPT_STATS.
It reports no. of bytes present in send queue, 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 10:38:35 -08:00 • committed by David S. Miller
parent 200066a5bd
commit 87ecc95d81
2 changed files with 4 additions and 1 deletions
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1
include/uapi/linux/tcp.h
View file

@ -241,6 +241,7 @@ enum {
TCP_NLA_MIN_RTT, /* minimum RTT */ TCP_NLA_MIN_RTT, /* minimum RTT */
TCP_NLA_RECUR_RETRANS, /* Recurring retransmits for the current pkt */ TCP_NLA_RECUR_RETRANS, /* Recurring retransmits for the current pkt */
TCP_NLA_DELIVERY_RATE_APP_LMT, /* delivery rate application limited ? */ TCP_NLA_DELIVERY_RATE_APP_LMT, /* delivery rate application limited ? */
TCP_NLA_SNDQ_SIZE, /* Data (bytes) pending in send queue */
}; };

4
net/ipv4/tcp.c
View file

@ -3031,7 +3031,7 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk)
u32 rate; u32 rate;
stats = alloc_skb(7 * nla_total_size_64bit(sizeof(u64)) + stats = alloc_skb(7 * nla_total_size_64bit(sizeof(u64)) +
3 * nla_total_size(sizeof(u32)) + 4 * nla_total_size(sizeof(u32)) +
2 * nla_total_size(sizeof(u8)), GFP_ATOMIC); 2 * nla_total_size(sizeof(u8)), GFP_ATOMIC);
if (!stats) if (!stats)
return NULL; return NULL;
@ -3061,6 +3061,8 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk)
nla_put_u8(stats, TCP_NLA_RECUR_RETRANS, inet_csk(sk)->icsk_retransmits); nla_put_u8(stats, TCP_NLA_RECUR_RETRANS, inet_csk(sk)->icsk_retransmits);
nla_put_u8(stats, TCP_NLA_DELIVERY_RATE_APP_LMT, !!tp->rate_app_limited); 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);
return stats; return stats;
} }