[Qemu-devel] [PATCH v2] io: fix handling of EOF / error conditions in websock GSource

[Daniel P . Berrangé]

We were never reporting the G_IO_HUP event when an end of file was hit
on the websocket channel.

We also didn't report G_IO_ERR when we hit a fatal error processing the
websocket protocol.

The latter in particular meant that the chardev code would not notice
when an eof/error was encountered on the websocket channel, unless the
guest OS happened to trigger a write operation.

This meant that once the first client had quit, the chardev would never
listen to accept a new client.

Fixes launchpad bug 1816819
Signed-off-by: Daniel P. Berrangé <address@hidden>
---

Changed in v2:
 - Fix typo
 - Remove use of G_IO_IN at same time as HUP/ERR since. It is
   not required since the websock source doesn't do a real
   poll itself.

 io/channel-websock.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/io/channel-websock.c b/io/channel-websock.c
index dc43dc6bb9..77d30f0e4a 100644
--- a/io/channel-websock.c
+++ b/io/channel-websock.c
@@ -1225,12 +1225,18 @@ qio_channel_websock_source_check(GSource *source)
     QIOChannelWebsockSource *wsource = (QIOChannelWebsockSource *)source;
     GIOCondition cond = 0;
 
-    if (wsource->wioc->rawinput.offset || wsource->wioc->io_eof) {
+    if (wsource->wioc->rawinput.offset) {
         cond |= G_IO_IN;
     }
     if (wsource->wioc->encoutput.offset < QIO_CHANNEL_WEBSOCK_MAX_BUFFER) {
         cond |= G_IO_OUT;
     }
+    if (wsource->wioc->io_eof) {
+        cond |= G_IO_HUP;
+    }
+    if (wsource->wioc->io_err) {
+        cond |= G_IO_ERR;
+    }
 
     return cond & wsource->condition;
 }
-- 
2.20.1