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| author | Dima Stepanov <dimastep@yandex-team.ru> | 2020-09-11 11:39:44 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-09-29 02:14:29 -0400 |
| commit | 1e5a050f57984134c1d488238db3bc7ccaa36e52 (patch) | |
| tree | 71cf51d49e28387605d24a1f161410b7ed9b5d64 /hw/virtio/vhost.c | |
| parent | f5b22d06fb0526c9292568dd1fc13b9d1a8b003e (diff) | |
| download | focaccia-qemu-1e5a050f57984134c1d488238db3bc7ccaa36e52.tar.gz focaccia-qemu-1e5a050f57984134c1d488238db3bc7ccaa36e52.zip | |
vhost: check queue state in the vhost_dev_set_log routine
If the vhost-user-blk daemon provides only one virtqueue, but device was added with several queues, then QEMU will send more VHOST-USER command than expected by daemon side. The vhost_virtqueue_start() routine handles such case by checking the return value from the virtio_queue_get_desc_addr() function call. Add the same check to the vhost_dev_set_log() routine. Signed-off-by: Dima Stepanov <dimastep@yandex-team.ru> Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com> Message-Id: <6232946d5af09e9775076645909964a6539b8ab5.1599813294.git.dimastep@yandex-team.ru> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio/vhost.c')
| -rw-r--r-- | hw/virtio/vhost.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 60bc516003..68f0a75134 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -835,12 +835,24 @@ out: static int vhost_dev_set_log(struct vhost_dev *dev, bool enable_log) { int r, i, idx; + hwaddr addr; + r = vhost_dev_set_features(dev, enable_log); if (r < 0) { goto err_features; } for (i = 0; i < dev->nvqs; ++i) { idx = dev->vhost_ops->vhost_get_vq_index(dev, dev->vq_index + i); + addr = virtio_queue_get_desc_addr(dev->vdev, idx); + if (!addr) { + /* + * The queue might not be ready for start. If this + * is the case there is no reason to continue the process. + * The similar logic is used by the vhost_virtqueue_start() + * routine. + */ + continue; + } r = vhost_virtqueue_set_addr(dev, dev->vqs + i, idx, enable_log); if (r < 0) { |