diff options
| author | Jason Wang <jasowang@redhat.com> | 2015-07-27 17:49:20 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2015-07-27 18:11:53 +0300 |
| commit | efb8206ca7f19f5a6ece1f2851a73a29de309b1e (patch) | |
| tree | 092d92ff2f2db1237da8e044acea01e5f7e547b7 /hw/block | |
| parent | 9d5b731dd2d64deb3bc798ef4e3c08603d54ae02 (diff) | |
virtio-blk: fail get_features when both scsi and 1.0 were set
SCSI passthrough was no longer supported in virtio 1.0, so this patch
fail the get_features() when both 1.0 and scsi is set. And also only
advertise VIRTIO_BLK_F_SCSI for legacy virtio-blk device.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/block')
| -rw-r--r-- | hw/block/virtio-blk.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index a6cf008ac0..ebd9d84ca2 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -731,8 +731,16 @@ static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features, virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY); virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY); virtio_add_feature(&features, VIRTIO_BLK_F_BLK_SIZE); - virtio_add_feature(&features, VIRTIO_BLK_F_SCSI); virtio_clear_feature(&features, VIRTIO_F_ANY_LAYOUT); + if (__virtio_has_feature(features, VIRTIO_F_VERSION_1)) { + if (s->conf.scsi) { + error_setg(errp, "Please set scsi=off for virtio-blk devices in order to use virtio 1.0"); + return 0; + } + virtio_add_feature(&features, VIRTIO_F_ANY_LAYOUT); + } else { + virtio_add_feature(&features, VIRTIO_BLK_F_SCSI); + } if (s->conf.config_wce) { virtio_add_feature(&features, VIRTIO_BLK_F_CONFIG_WCE); |