[Qemu-devel] [PATCH v3 2/3] io: include full error message in websocket handshake trace

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

When the websocket handshake fails it is useful to log the real
error message via the trace points for debugging purposes.

Fixes bug: #1715186

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 io/channel-websock.c | 7 ++++---
 io/trace-events      | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/io/channel-websock.c b/io/channel-websock.c
index cc93a23f8b..5d2df95596 100644
--- a/io/channel-websock.c
+++ b/io/channel-websock.c
@@ -508,7 +508,7 @@ static gboolean qio_channel_websock_handshake_send(QIOChannel *ioc,
                             &err);
 
     if (ret < 0) {
-        trace_qio_channel_websock_handshake_fail(ioc);
+        trace_qio_channel_websock_handshake_fail(ioc, error_get_pretty(err));
         qio_task_set_error(task, err);
         qio_task_complete(task);
         return FALSE;
@@ -517,7 +517,8 @@ static gboolean qio_channel_websock_handshake_send(QIOChannel *ioc,
     buffer_advance(&wioc->encoutput, ret);
     if (wioc->encoutput.offset == 0) {
         if (wioc->io_err) {
-            trace_qio_channel_websock_handshake_fail(ioc);
+            trace_qio_channel_websock_handshake_fail(
+                ioc, error_get_pretty(wioc->io_err));
             qio_task_set_error(task, wioc->io_err);
             wioc->io_err = NULL;
             qio_task_complete(task);
@@ -548,7 +549,7 @@ static gboolean qio_channel_websock_handshake_io(QIOChannel *ioc,
          * client connection, as most of the time we have an
          * HTTP 4xx err response to send instead
          */
-        trace_qio_channel_websock_handshake_fail(ioc);
+        trace_qio_channel_websock_handshake_fail(ioc, error_get_pretty(err));
         qio_task_set_error(task, err);
         qio_task_complete(task);
         return FALSE;
diff --git a/io/trace-events b/io/trace-events
index 3d233698d0..6459f71f5b 100644
--- a/io/trace-events
+++ b/io/trace-events
@@ -46,7 +46,7 @@ qio_channel_websock_new_server(void *ioc, void *master) "Websock new client ioc=
 qio_channel_websock_handshake_start(void *ioc) "Websock handshake start ioc=%p"
 qio_channel_websock_handshake_pending(void *ioc, int status) "Websock handshake pending ioc=%p status=%d"
 qio_channel_websock_handshake_reply(void *ioc) "Websock handshake reply ioc=%p"
-qio_channel_websock_handshake_fail(void *ioc) "Websock handshake fail ioc=%p"
+qio_channel_websock_handshake_fail(void *ioc, const char *msg) "Websock handshake fail ioc=%p err=%s"
 qio_channel_websock_handshake_complete(void *ioc) "Websock handshake complete ioc=%p"
 
 # io/channel-command.c
-- 
2.13.5