tcp: export data delivery rate

[cascardo/linux.git] / net / ipv4 / tcp.c

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 2250f89..f253e50 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2712,7 +2712,7 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
 {
        const struct tcp_sock *tp = tcp_sk(sk); /* iff sk_type == SOCK_STREAM */
        const struct inet_connection_sock *icsk = inet_csk(sk);
-       u32 now = tcp_time_stamp;
+       u32 now = tcp_time_stamp, intv;
        unsigned int start;
        int notsent_bytes;
        u64 rate64;
@@ -2802,6 +2802,15 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
        info->tcpi_min_rtt = tcp_min_rtt(tp);
        info->tcpi_data_segs_in = tp->data_segs_in;
        info->tcpi_data_segs_out = tp->data_segs_out;
+
+       info->tcpi_delivery_rate_app_limited = tp->rate_app_limited ? 1 : 0;
+       rate = READ_ONCE(tp->rate_delivered);
+       intv = READ_ONCE(tp->rate_interval_us);
+       if (rate && intv) {
+               rate64 = (u64)rate * tp->mss_cache * USEC_PER_SEC;
+               do_div(rate64, intv);
+               put_unaligned(rate64, &info->tcpi_delivery_rate);
+       }
 }
 EXPORT_SYMBOL_GPL(tcp_get_info);