On 14/02/2025 11:06, Markus Armbruster wrote:
Laurent Vivier <lviv...@redhat.com> writes:
The netdev reports NETDEV_VHOST_USER_CONNECTED event when
the chardev is connected, and NETDEV_VHOST_USER_DISCONNECTED
when it is disconnected.
The NETDEV_VHOST_USER_CONNECTED event includes the ChardevInfo
(label, filename and frontend_open).
This allows a system manager like libvirt to detect when the server
fails.
For instance with passt:
{ 'execute': 'qmp_capabilities' }
{ "return": { } }
[killing passt here]
{ "timestamp": { "seconds": 1739517243, "microseconds": 115081 },
"event": "NETDEV_VHOST_USER_DISCONNECTED",
"data": { "netdev-id": "netdev0" } }
[automatic reconnection with reconnect-ms]
{ "timestamp": { "seconds": 1739517290, "microseconds": 343777 },
"event": "NETDEV_VHOST_USER_CONNECTED",
"data": { "netdev-id": "netdev0",
"info": { "frontend-open": true,
"filename": "unix:",
"label": "chr0" } } }
Signed-off-by: Laurent Vivier <lviv...@redhat.com>
Standard question for events: if a management application misses an
event, say because it restarts and reconnects, is there a way to obtain
the missed information with a query command?
query-chardev could help but it doesn't provide the netdev id.
in HMP, "info network" has the information, but for QMP we had a try with a query-netdev
in the past but the series has been reverted.
f9bb0c1f9862 ("Revert "qapi: net: Add query-netdev command"")
d32ad10a14d4 ("qapi: net: Add query-netdev command")
Thanks,
Laurent
Thanks
Laurent
