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| author | Hawkins Jiawei <yin31149@gmail.com> | 2023-07-04 11:34:34 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-07-10 18:59:32 -0400 |
| commit | f45fd95ec9e8104f6af801c734375029dda0f542 (patch) | |
| tree | 6ce543c7a8839b7e4e030afe2013693836b18969 /net | |
| parent | b479bc3c9d5e473553137641fd31069c251f0d6e (diff) | |
| download | qemu-f45fd95ec9e8104f6af801c734375029dda0f542.zip qemu-f45fd95ec9e8104f6af801c734375029dda0f542.tar.gz qemu-f45fd95ec9e8104f6af801c734375029dda0f542.tar.bz2 | |
vdpa: Return -EIO if device ack is VIRTIO_NET_ERR in _load_mq()
According to VirtIO standard, "The class, command and
command-specific-data are set by the driver,
and the device sets the ack byte.
There is little it can do except issue a diagnostic
if ack is not VIRTIO_NET_OK."
Therefore, QEMU should stop sending the queued SVQ commands and
cancel the device startup if the device's ack is not VIRTIO_NET_OK.
Yet the problem is that, vhost_vdpa_net_load_mq() returns 1 based on
`*s->status != VIRTIO_NET_OK` when the device's ack is VIRTIO_NET_ERR.
As a result, net->nc->info->load() also returns 1, this makes
vhost_net_start_one() incorrectly assume the device state is
successfully loaded by vhost_vdpa_net_load() and return 0, instead of
goto `fail` label to cancel the device startup, as vhost_net_start_one()
only cancels the device startup when net->nc->info->load() returns a
negative value.
This patch fixes this problem by returning -EIO when the device's
ack is not VIRTIO_NET_OK.
Fixes: f64c7cda69 ("vdpa: Add vhost_vdpa_net_load_mq")
Signed-off-by: Hawkins Jiawei <yin31149@gmail.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <ec515ebb0b4f56368751b9e318e245a5d994fa72.1688438055.git.yin31149@gmail.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/vhost-vdpa.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 345a301..8477ed2 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -677,8 +677,11 @@ static int vhost_vdpa_net_load_mq(VhostVDPAState *s, if (unlikely(dev_written < 0)) { return dev_written; } + if (*s->status != VIRTIO_NET_OK) { + return -EIO; + } - return *s->status != VIRTIO_NET_OK; + return 0; } static int vhost_vdpa_net_load_offloads(VhostVDPAState *s, |