Re: [PATCH v1 7/7] migration/tls: add trace points for multifd-tls

["Daniel P. Berrangé" <berrange@redhat.com>]

On Wed, Sep 09, 2020 at 10:52:57PM +0800, Chuan Zheng wrote:
> add trace points for multifd-tls for debug.
> 
> Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
> Signed-off-by: Yan Jin <jinyan12@huawei.com>
> ---
>  migration/multifd.c    | 10 +++++++++-
>  migration/trace-events |  5 +++++
>  2 files changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/migration/multifd.c b/migration/multifd.c
> index 2509187..26935b6 100644
> --- a/migration/multifd.c
> +++ b/migration/multifd.c
> @@ -730,7 +730,11 @@ static void multifd_tls_outgoing_handshake(QIOTask *task,
>      QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
>      Error *err = NULL;
>  
> -    qio_task_propagate_error(task, &err);
> +    if (qio_task_propagate_error(task, &err)) {
> +        trace_multifd_tls_outgoing_handshake_error(error_get_pretty(err));
> +    } else {
> +        trace_multifd_tls_outgoing_handshake_complete();
> +    }
>      multifd_channel_connect(p, ioc, err);
>  }
>  
> @@ -747,6 +751,7 @@ static void multifd_tls_channel_connect(MultiFDSendParams *p,
>          return;
>      }
>  
> +    trace_multifd_tls_outgoing_handshake_start(hostname);
>      qio_channel_set_name(QIO_CHANNEL(tioc), "multifd-tls-outgoing");
>      qio_channel_tls_handshake(tioc,
>                                multifd_tls_outgoing_handshake,
> @@ -762,6 +767,9 @@ static bool multifd_channel_connect(MultiFDSendParams *p,
>  {
>      MigrationState *s = p->s;
>  
> +    trace_multifd_set_outgoing_channel(
> +        ioc, object_get_typename(OBJECT(ioc)), s->hostname, error);
> +
>      if (!error) {
>          if (s->parameters.tls_creds &&
>              *s->parameters.tls_creds &&
> diff --git a/migration/trace-events b/migration/trace-events
> index 4ab0a50..860d2c4 100644
> --- a/migration/trace-events
> +++ b/migration/trace-events
> @@ -109,6 +109,11 @@ multifd_send_sync_main_wait(uint8_t id) "channel %d"
>  multifd_send_terminate_threads(bool error) "error %d"
>  multifd_send_thread_end(uint8_t id, uint64_t packets, uint64_t pages) "channel %d packets %" PRIu64 " pages %"  PRIu64
>  multifd_send_thread_start(uint8_t id) "%d"
> +multifd_tls_outgoing_handshake_start(const char *hostname) "hostname=%s"
> +multifd_tls_outgoing_handshake_error(const char *err) "err=%s"
> +multifd_tls_outgoing_handshake_complete(void) ""

I'd suggest adding 'void *ioc' for all of these to make it clearer to
correlate the traces.

> +multifd_set_outgoing_channel(void *ioc, const char *ioctype, const char *hostname, void *err)  "ioc=%p ioctype=%s hostname=%s err=%p"
> +
>  ram_discard_range(const char *rbname, uint64_t start, size_t len) "%s: start: %" PRIx64 " %zx"
>  ram_load_loop(const char *rbname, uint64_t addr, int flags, void *host) "%s: addr: 0x%" PRIx64 " flags: 0x%x host: %p"
>  ram_load_postcopy_loop(uint64_t addr, int flags) "@%" PRIx64 " %x"
> -- 
> 1.8.3.1
> 

Regards,
Daniel
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