diff options
| author | Arnaldo Carvalho de Melo <acme@mandriva.com> | 2005-08-24 06:52:35 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2005-08-30 01:05:07 +0200 |
| commit | 2babe1f6fea717c36c008c878fe095d1ca5696c1 (patch) | |
| tree | f2ce23b6e5898a6bec8726f17104074516559397 /net/dccp/diag.c | |
| parent | [CCID3]: Calculate the RTT in the RX half connection (diff) | |
| download | linux-2babe1f6fea717c36c008c878fe095d1ca5696c1.tar.xz linux-2babe1f6fea717c36c008c878fe095d1ca5696c1.zip | |
[DCCP]: Introduce dccp_get_info
And also hc_tx and hc_rx get_info functions for the CCIDs to fill in
information that is specific to them.
For now reusing struct tcp_info, later I'll try to figure out a better
solution, for now its really nice to get this kind of info:
[root@qemu ~]# ./ss -danemi
State Recv-Q Send-Q Local Addr:Port Peer Addr:Port
LISTEN 0 0 *:5001 *:* ino:628 sk:c1340040
mem:(r0,w0,f0,t0) cwnd:0 ssthresh:0
ESTAB 0 0 172.20.0.2:5001 172.20.0.1:32785 ino:629 sk:c13409a0
mem:(r0,w0,f0,t0) ts rto:1000 rtt:0.004/0 cwnd:0 ssthresh:0 rcv_rtt:61.377
This, for instance, shows that we're not congestion controlling ACKs,
as the above output is in the ttcp receiving host, and ttcp is a one
way app, i.e. the received never calls sendmsg, so
ccid_hc_tx_send_packet is never called, so the TX half connection
stays in TFRC_SSTATE_NO_SENT state and hctx_rtt is never calculated,
stays with the value set in ccid3_hc_tx_init, 4us, as show above in
milliseconds (0.004ms), upcoming patches will fix this.
rcv_rtt seems sane tho, matching ping results :-)
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/diag.c')
| -rw-r--r-- | net/dccp/diag.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/net/dccp/diag.c b/net/dccp/diag.c index 0b10c176c35a..f675d8e642d3 100644 --- a/net/dccp/diag.c +++ b/net/dccp/diag.c @@ -14,19 +14,43 @@ #include <linux/module.h> #include <linux/inet_diag.h> +#include "ccid.h" #include "dccp.h" +static void dccp_get_info(struct sock *sk, struct tcp_info *info) +{ + struct dccp_sock *dp = dccp_sk(sk); + const struct inet_connection_sock *icsk = inet_csk(sk); + + memset(info, 0, sizeof(*info)); + + info->tcpi_state = sk->sk_state; + info->tcpi_retransmits = icsk->icsk_retransmits; + info->tcpi_probes = icsk->icsk_probes_out; + info->tcpi_backoff = icsk->icsk_backoff; + info->tcpi_pmtu = dp->dccps_pmtu_cookie; + + if (dp->dccps_options.dccpo_send_ack_vector) + info->tcpi_options |= TCPI_OPT_SACK; + + ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info); + ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info); +} + static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, void *_info) { r->idiag_rqueue = r->idiag_wqueue = 0; + + if (_info != NULL) + dccp_get_info(sk, _info); } static struct inet_diag_handler dccp_diag_handler = { .idiag_hashinfo = &dccp_hashinfo, .idiag_get_info = dccp_diag_get_info, .idiag_type = DCCPDIAG_GETSOCK, - .idiag_info_size = 0, + .idiag_info_size = sizeof(struct tcp_info), }; static int __init dccp_diag_init(void) |