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SubjectRe: [PATCH v2 net-next] net: tracepoint: exposing sk_faimily in tracepoint inet_sock_set_state
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> On Jan 6, 2018, at 10:31 PM, Yafang Shao <laoar.shao@gmail.com> wrote:
>
> As of now, there're two sk_family are traced with sock:inet_sock_set_state,
> which are AF_INET and AF_INET6.
> So the sk_family are exposed as well.
> Then we can conveniently use it to do the filter.
>
> Both sk_family and sk_protocol are showed in the printk message, so we need
> not expose them as tracepoint arguments.
>
> Suggested-by: Brendan Gregg <brendan.d.gregg@gmail.com>
> Suggested-by: Song Liu <songliubraving@fb.com>
> Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
> ---
> include/trace/events/sock.h | 15 +++++++++++++--
> 1 file changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/include/trace/events/sock.h b/include/trace/events/sock.h
> index 3537c5f..3176a39 100644
> --- a/include/trace/events/sock.h
> +++ b/include/trace/events/sock.h
> @@ -11,7 +11,11 @@
> #include <linux/ipv6.h>
> #include <linux/tcp.h>
>
> -/* The protocol traced by sock_set_state */
> +#define family_names \
> + EM(AF_INET) \
> + EMe(AF_INET6)
> +
> +/* The protocol traced by inet_sock_set_state */
> #define inet_protocol_names \
> EM(IPPROTO_TCP) \
> EM(IPPROTO_DCCP) \
> @@ -37,6 +41,7 @@
> #define EM(a) TRACE_DEFINE_ENUM(a);
> #define EMe(a) TRACE_DEFINE_ENUM(a);
>
> +family_names
> inet_protocol_names
> tcp_state_names
>
> @@ -45,6 +50,9 @@
> #define EM(a) { a, #a },
> #define EMe(a) { a, #a }
>
> +#define show_family_name(val) \
> + __print_symbolic(val, family_names)
> +
> #define show_inet_protocol_name(val) \
> __print_symbolic(val, inet_protocol_names)
>
> @@ -118,6 +126,7 @@
> __field(int, newstate)
> __field(__u16, sport)
> __field(__u16, dport)
> + __field(__u16, family)
> __field(__u8, protocol)
> __array(__u8, saddr, 4)
> __array(__u8, daddr, 4)
> @@ -134,6 +143,7 @@
> __entry->oldstate = oldstate;
> __entry->newstate = newstate;
>
> + __entry->family = sk->sk_family;
> __entry->protocol = sk->sk_protocol;
> __entry->sport = ntohs(inet->inet_sport);
> __entry->dport = ntohs(inet->inet_dport);
> @@ -160,7 +170,8 @@
> }
> ),
>
> - TP_printk("protocol=%s sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c oldstate=%s newstate=%s",
> + TP_printk("family=%s protocol=%s sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c oldstate=%s newstate=%s",
> + show_family_name(__entry->family),
> show_inet_protocol_name(__entry->protocol),
> __entry->sport, __entry->dport,
> __entry->saddr, __entry->daddr,
> --
> 1.8.3.1
>

Reviewed-by: Song Liu <songliubraving@fb.com>

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