path: root/net/ipv4/tcp_diag.c
diff options
authorSridhar Samudrala <sri@us.ibm.com>2006-06-27 13:29:00 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-29 16:57:57 -0700
commit47da8ee681d04e68ca1b1812c10e28162150d453 (patch)
tree05b9abc2438abe0e9ecef1b6632a9b114e6cb55b /net/ipv4/tcp_diag.c
parent[NETLINK]: Encapsulate eff_cap usage within security framework. (diff)
[TCP]: Export accept queue len of a TCP listening socket via rx_queue
While debugging a TCP server hang issue, we noticed that currently there is no way for a user to get the acceptq backlog value for a TCP listen socket. All the standard networking utilities that display socket info like netstat, ss and /proc/net/tcp have 2 fields called rx_queue and tx_queue. These fields do not mean much for listening sockets. This patch uses one of these unused fields(rx_queue) to export the accept queue len for listening sockets. Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_diag.c')
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index c148c1081880..b56399c7cc12 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -26,7 +26,10 @@ static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
const struct tcp_sock *tp = tcp_sk(sk);
struct tcp_info *info = _info;
- r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
+ if (sk->sk_state == TCP_LISTEN)
+ r->idiag_rqueue = sk->sk_ack_backlog;
+ else
+ r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
r->idiag_wqueue = tp->write_seq - tp->snd_una;
if (info != NULL)
tcp_get_info(sk, info);