[Qemu-devel] [PATCH 4/4] ui: extend VNC trottling tracing to SASL codepaths

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

In previous commit:

  commit 6aa22a29187e1908f5db738d27c64a9efc8d0bfa
  Author: Daniel P. Berrange <berrange@redhat.com>
  Date:   Mon Dec 18 19:12:27 2017 +0000

    ui: add trace events related to VNC client throttling

trace points related to unthrottling client I/O were missed from the
SASL codepaths.

Reported-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 ui/vnc-auth-sasl.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ui/vnc-auth-sasl.c b/ui/vnc-auth-sasl.c
index 8ebd0d3d00..3751a777a4 100644
--- a/ui/vnc-auth-sasl.c
+++ b/ui/vnc-auth-sasl.c
@@ -79,12 +79,23 @@ size_t vnc_client_write_sasl(VncState *vs)
 
     vs->sasl.encodedOffset += ret;
     if (vs->sasl.encodedOffset == vs->sasl.encodedLength) {
+        bool throttled = vs->force_update_offset != 0;
+        size_t offset;
         if (vs->sasl.encodedRawLength >= vs->force_update_offset) {
             vs->force_update_offset = 0;
         } else {
             vs->force_update_offset -= vs->sasl.encodedRawLength;
         }
+        if (throttled && vs->force_update_offset == 0) {
+            trace_vnc_client_unthrottle_forced(vs, vs->ioc);
+        }
+        offset = vs->output.offset;
         buffer_advance(&vs->output, vs->sasl.encodedRawLength);
+        if (offset >= vs->throttle_output_offset &&
+            vs->output.offset < vs->throttle_output_offset) {
+            trace_vnc_client_unthrottle_incremental(vs, vs->ioc,
+                                                    vs->output.offset);
+        }
         vs->sasl.encoded = NULL;
         vs->sasl.encodedOffset = vs->sasl.encodedLength = 0;
     }
-- 
2.14.3