io: get rid of bounce buffering in websock write path

Currently most outbound I/O on the websock channel gets copied into the
rawoutput buffer, and then immediately copied again into the encoutput
buffer, with a header prepended. Now that qio_channel_websock_encode
accepts a struct iovec, we can trivially remove this bounce buffering
and write directly to encoutput.

In doing so, we also now correctly validate the encoutput size against
the QIO_CHANNEL_WEBSOCK_MAX_BUFFER limit.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/io/channel-websock.h b/include/io/channel-websock.h
index 3762707b9c..a7e5e92e61 100644
--- a/include/io/channel-websock.h
+++ b/include/io/channel-websock.h
@@ -59,7 +59,6 @@ struct QIOChannelWebsock {
     Buffer encinput;
     Buffer encoutput;
     Buffer rawinput;
-    Buffer rawoutput;
     size_t payload_remain;
     size_t pong_remain;
     QIOChannelWebsockMask mask;