usb-host: fix zero-length packets

[qemu.git] / hw / virtio-blk.h

diff --git a/hw/virtio-blk.h b/hw/virtio-blk.h
index f675375399fd1eaf706af1bbc0fd7eb6536240e8..244dce45aa31b9f6f85d3135c0d4e6cab3bf9475 100644 (file)
--- a/hw/virtio-blk.h
+++ b/hw/virtio-blk.h
@@ -34,6 +34,8 @@
 #define VIRTIO_BLK_F_WCACHE     9       /* write cache enabled */
 #define VIRTIO_BLK_F_TOPOLOGY   10      /* Topology information is available */
 
+#define VIRTIO_BLK_ID_BYTES     20      /* ID string length */
+
 struct virtio_blk_config
 {
     uint64_t capacity;
@@ -42,12 +44,12 @@ struct virtio_blk_config
     uint16_t cylinders;
     uint8_t heads;
     uint8_t sectors;
-    uint32_t _blk_size;    /* structure pad, currently unused */
+    uint32_t blk_size;
     uint8_t physical_block_exp;
     uint8_t alignment_offset;
     uint16_t min_io_size;
     uint32_t opt_io_size;
-} __attribute__((packed));
+} QEMU_PACKED;
 
 /* These two define direction. */
 #define VIRTIO_BLK_T_IN         0
@@ -59,6 +61,9 @@ struct virtio_blk_config
 /* Flush the volatile write cache */
 #define VIRTIO_BLK_T_FLUSH      4
 
+/* return the device ID string */
+#define VIRTIO_BLK_T_GET_ID     8
+
 /* Barrier before this op. */
 #define VIRTIO_BLK_T_BARRIER    0x80000000