[PATCH] return useful listenq info in tcp_info and INET_DIAG_INFO

[Rick Jones]

Return some useful information such as the maximum listen backlog and the
current listen backlog in the tcp_info structure and INET_DIAG_INFO.

Signed-off-by: Rick Jones <[EMAIL PROTECTED]>
Signed-off-by: Eric Dumazet <[EMAIL PROTECTED]>
---

diff -r bdcdd0e1ee9d net/ipv4/tcp.c
--- a/net/ipv4/tcp.c    Sat Sep 01 07:00:31 2007 +0000
+++ b/net/ipv4/tcp.c    Tue Sep 18 11:02:26 2007 -0700
@@ -2030,8 +2030,14 @@ void tcp_get_info(struct sock *sk, struc
        info->tcpi_snd_mss = tp->mss_cache;
        info->tcpi_rcv_mss = icsk->icsk_ack.rcv_mss;
 
-       info->tcpi_unacked = tp->packets_out;
-       info->tcpi_sacked = tp->sacked_out;
+       if (sk->sk_state == TCP_LISTEN) {
+               info->tcpi_unacked = sk->sk_ack_backlog;
+               info->tcpi_sacked = sk->sk_max_ack_backlog;
+       }
+       else {
+               info->tcpi_unacked = tp->packets_out;
+               info->tcpi_sacked = tp->sacked_out;
+       }
        info->tcpi_lost = tp->lost_out;
        info->tcpi_retrans = tp->retrans_out;
        info->tcpi_fackets = tp->fackets_out;
diff -r bdcdd0e1ee9d net/ipv4/tcp_diag.c
--- a/net/ipv4/tcp_diag.c       Sat Sep 01 07:00:31 2007 +0000
+++ b/net/ipv4/tcp_diag.c       Tue Sep 18 11:02:26 2007 -0700
@@ -25,11 +25,14 @@ static void tcp_diag_get_info(struct soc
        const struct tcp_sock *tp = tcp_sk(sk);
        struct tcp_info *info = _info;
 
-       if (sk->sk_state == TCP_LISTEN)
+       if (sk->sk_state == TCP_LISTEN) {
                r->idiag_rqueue = sk->sk_ack_backlog;
-       else
+               r->idiag_wqueue = sk->sk_max_ack_backlog;
+       }
+       else {
                r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
-       r->idiag_wqueue = tp->write_seq - tp->snd_una;
+               r->idiag_wqueue = tp->write_seq - tp->snd_una;
+       }
        if (info != NULL)
                tcp_get_info(sk, info);
 }
-
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