sk_err.bt

#include <net/sock.h>
#include <net/inet_sock.h>
#include <net/inet_connection_sock.h>
#include <net/tcp.h>
#include <linux/netdevice.h>

kprobe:sk_error_report {
    $sock = (struct sock *)arg0;
    $isock = (struct inet_sock *)arg0;
    $tsock = (struct tcp_sock *)arg0;
    printf ("%s - SK_ERR(%d) saddr=%p:%hu -snd_wnd %u\n%s\n",
                strftime("%H:%M:%S:%f", nsecs),
                $sock->sk_err,
                $isock->inet_saddr,
                $isock->inet_sport,
                $tsock->snd_wnd,
                kstack());
}

kprobe:tcp_send_probe0 {
    $sock = (struct sock *)arg0;
    $isock = (struct inet_sock *)arg0;
    $icsock = (struct inet_connection_sock *)arg0;
    $tsock = (struct tcp_sock *)arg0;
    printf ("%s - send_probe0 - saddr=%p:%hu - snd_wnd %u, icsk_probes_out = %u+1\n",
                strftime("%H:%M:%S:%f", nsecs), $isock->inet_saddr,
                $isock->inet_sport, $tsock->snd_wnd, $icsock->icsk_probes_out);
}

kprobe:tcp_write_timer_handler {
    $sock = (struct sock *)arg0;
    $isock = (struct inet_sock *)arg0;
    $icsock = (struct inet_connection_sock *)arg0;
    $tsock = (struct tcp_sock *)arg0;
    
    if ($icsock->icsk_pending == ICSK_TIME_PROBE0 || $icsock->icsk_pending == ICSK_TIME_RETRANS) {
        printf ("%s - write_timer - saddr=%p:%hu - snd_wnd %u, event %u\n",
                    strftime("%H:%M:%S:%f", nsecs), $isock->inet_saddr,
                    $isock->inet_sport, $tsock->snd_wnd, $icsock->icsk_pending);
    }
}

kprobe:netif_carrier_off {
    $dev = (struct net_device *)arg0;
    printf ("%s - netif_carrier_off %s\n",
                strftime("%H:%M:%S:%f", nsecs), $dev->name);
}

kprobe:dev_deactivate {
    $dev = (struct net_device *)arg0;
    printf ("%s - dev_deactivate %s\n",
                strftime("%H:%M:%S:%f", nsecs), $dev->name);
}
kprobe: linkwatch_fire_event {
    $dev = (struct net_device *)arg0;
    printf ("%s - linkwatch_fire_event (sched) %s - state %d\n%s\n",
                strftime("%H:%M:%S:%f", nsecs), $dev->name, $dev->state, kstack());
}

kprobe:linkwatch_do_dev {
 $dev = (struct net_device *)arg0;
    printf ("%s - linkwatch_do_dev %s - state %d\n",
                strftime("%H:%M:%S:%f", nsecs), $dev->name, $dev->state);
}

kretprobe:__dev_direct_xmit {
    if (!retval) {
        return;
    }
    printf ("%s - direct_xmit rc = %d\n",
                strftime("%H:%M:%S:%f", nsecs), retval);
}

kretprobe:dev_queue_xmit {
    if (!retval) {
        return;
    }
    printf ("%s - dev_queue_xmit rc = %d\n",
                strftime("%H:%M:%S:%f", nsecs), retval);
}