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| author | Luigi Rizzo <rizzo@iet.unipi.it> | 2013-02-05 17:53:31 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-02-27 16:10:23 +0100 |
| commit | 199ee608f0d08510b5c6c37f31a7fbff211d63c4 (patch) | |
| tree | 62d264bb698419fdc701bd11830d47d905cab9e8 /net/hub.h | |
| parent | ee24aaf356f44ca7c8fbef136a438c12091cffd0 (diff) | |
net: fix qemu_flush_queued_packets() in presence of a hub
When frontend and backend are connected through a hub as below
(showing only one direction), and the frontend (or in general, all
output ports of the hub) cannot accept more traffic, the backend
queues packets in queue-A.
When the frontend (or in general, one output port) becomes ready again,
quemu tries to flush packets from queue-B, which is unfortunately empty.
e1000.0 <--[queue B]-- hub0port0(hub)hub0port1 <--[queue A]-- tap.0
To fix this i propose to introduce a new function net_hub_flush()
which is called when trying to flush a queue connected to a hub.
Signed-off-by: Luigi Rizzo <rizzo@iet.unipi.it>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'net/hub.h')
| -rw-r--r-- | net/hub.h | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -21,5 +21,6 @@ NetClientState *net_hub_add_port(int hub_id, const char *name); NetClientState *net_hub_find_client_by_name(int hub_id, const char *name); void net_hub_info(Monitor *mon); void net_hub_check_clients(void); +bool net_hub_flush(NetClientState *nc); #endif /* NET_HUB_H */ |