[PATCH 1/1] virtio: disable partitions scanning for no partitions block

[Yury Kamenev]

Signed-off-by: Yury Kamenev <damtev@yandex-team.ru>
---
 hw/block/virtio-blk.c                       | 4 ++++
 include/hw/virtio/virtio-blk.h              | 1 +
 include/standard-headers/linux/virtio_blk.h | 1 +
 3 files changed, 6 insertions(+)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index f139cd7cc9..abf375b490 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -1031,6 +1031,9 @@ static uint64_t virtio_blk_get_features(VirtIODevice 
*vdev, uint64_t features,
     if (s->conf.num_queues > 1) {
         virtio_add_feature(&features, VIRTIO_BLK_F_MQ);
     }
+    if (!s->conf.scan_parts) {
+        virtio_add_feature(&features, VIRTIO_BLK_F_NO_PS);
+    }
 
     return features;
 }
@@ -1295,6 +1298,7 @@ static Property virtio_blk_properties[] = {
 #endif
     DEFINE_PROP_BIT("request-merging", VirtIOBlock, conf.request_merging, 0,
                     true),
+    DEFINE_PROP_BOOL("scan-parts", VirtIOBlock, conf.scan_parts, true),
     DEFINE_PROP_UINT16("num-queues", VirtIOBlock, conf.num_queues,
                        VIRTIO_BLK_AUTO_NUM_QUEUES),
     DEFINE_PROP_UINT16("queue-size", VirtIOBlock, conf.queue_size, 256),
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index 29655a406d..706a789ad5 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -41,6 +41,7 @@ struct VirtIOBlkConf
     uint16_t num_queues;
     uint16_t queue_size;
     bool seg_max_adjust;
+    bool scan_parts;
     bool report_discard_granularity;
     uint32_t max_discard_sectors;
     uint32_t max_write_zeroes_sectors;
diff --git a/include/standard-headers/linux/virtio_blk.h 
b/include/standard-headers/linux/virtio_blk.h
index 2dcc90826a..6b7b2db29c 100644
--- a/include/standard-headers/linux/virtio_blk.h
+++ b/include/standard-headers/linux/virtio_blk.h
@@ -40,6 +40,7 @@
 #define VIRTIO_BLK_F_MQ                12      /* support more than one vq */
 #define VIRTIO_BLK_F_DISCARD   13      /* DISCARD is supported */
 #define VIRTIO_BLK_F_WRITE_ZEROES      14      /* WRITE ZEROES is supported */
+#define VIRTIO_BLK_F_NO_PS      16      /* Disable partitions scanning */
 
 /* Legacy feature bits */
 #ifndef VIRTIO_BLK_NO_LEGACY
-- 
2.24.3 (Apple Git-128)