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vhost-user: Send VHOST_RESET_OWNER on vhost stop 

Ensure that the vhost-user slave knows when the vrings are valid and
when they are invalid, for example during a guest reboot.

The vhost-user protocol says this of VHOST_RESET_OWNER:

      Issued when a new connection is about to be closed. The Master
      will no longer own this connection (and will usually close it).

Send this message to tell the vhost-user slave that the vhost session
has ended and that session state (e.g. vrings) is no longer valid.

Signed-off-by: Luke Gorrie <luke@snabb.co>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Luke Gorrie 2015-04-26 15:00:49 +02:00 committed by Michael S. Tsirkin
parent 658c27181b
commit 294ce717e0
1 changed files with 7 additions and 0 deletions
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7
hw/net/vhost_net.c
View File

@ -263,6 +263,13 @@ static void vhost_net_stop_one(struct vhost_net *net,
&file);
assert(r >= 0);
}
} else if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) {
for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
const VhostOps *vhost_ops = net->dev.vhost_ops;
int r = vhost_ops->vhost_call(&net->dev, VHOST_RESET_OWNER,
NULL);
assert(r >= 0);
}
}
if (net->nc->info->poll) {
net->nc->info->poll(net->nc, true);