diff options
| author | fuyuanli <fuyuanli@didiglobal.com> | 2024-03-05 11:04:17 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-03-08 10:25:47 +0000 |
| commit | caabd859c41b50a571cfdf7747de9f245c5d531b (patch) | |
| tree | 29348feae2058257acf7bafa281bb5b6a3741fec | |
| parent | 6025b9135f7a8b46826a5fcf947259da43bac281 (diff) | |
tcp: Add skb addr and sock addr to arguments of tracepoint tcp_probe.
It is useful to expose skb addr and sock addr to user in tracepoint
tcp_probe, so that we can get more information while monitoring
receiving of tcp data, by ebpf or other ways.
For example, we need to identify a packet by seq and end_seq when
calculate transmit latency between layer 2 and layer 4 by ebpf, but which is
not available in tcp_probe, so we can only use kprobe hooking
tcp_rcv_established to get them. But we can use tcp_probe directly if skb
addr and sock addr are available, which is more efficient.
Signed-off-by: fuyuanli <fuyuanli@didiglobal.com>
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/trace/events/tcp.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h index 6ca3e0343666..699dafd204ea 100644 --- a/include/trace/events/tcp.h +++ b/include/trace/events/tcp.h @@ -259,6 +259,8 @@ TRACE_EVENT(tcp_probe, __field(__u32, srtt) __field(__u32, rcv_wnd) __field(__u64, sock_cookie) + __field(const void *, skbaddr) + __field(const void *, skaddr) ), TP_fast_assign( @@ -286,14 +288,18 @@ TRACE_EVENT(tcp_probe, __entry->ssthresh = tcp_current_ssthresh(sk); __entry->srtt = tp->srtt_us >> 3; __entry->sock_cookie = sock_gen_cookie(sk); + + __entry->skbaddr = skb; + __entry->skaddr = sk; ), - TP_printk("family=%s src=%pISpc dest=%pISpc mark=%#x data_len=%d snd_nxt=%#x snd_una=%#x snd_cwnd=%u ssthresh=%u snd_wnd=%u srtt=%u rcv_wnd=%u sock_cookie=%llx", + TP_printk("family=%s src=%pISpc dest=%pISpc mark=%#x data_len=%d snd_nxt=%#x snd_una=%#x snd_cwnd=%u ssthresh=%u snd_wnd=%u srtt=%u rcv_wnd=%u sock_cookie=%llx skbaddr=%p skaddr=%p", show_family_name(__entry->family), __entry->saddr, __entry->daddr, __entry->mark, __entry->data_len, __entry->snd_nxt, __entry->snd_una, __entry->snd_cwnd, __entry->ssthresh, __entry->snd_wnd, - __entry->srtt, __entry->rcv_wnd, __entry->sock_cookie) + __entry->srtt, __entry->rcv_wnd, __entry->sock_cookie, + __entry->skbaddr, __entry->skaddr) ); #define TP_STORE_ADDR_PORTS_SKB_V4(__entry, skb) \ |