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-rw-r--r--include/linux/virtio_blk.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
index e0edb40ca7a..6d8e61c4856 100644
--- a/include/linux/virtio_blk.h
+++ b/include/linux/virtio_blk.h
@@ -37,8 +37,14 @@
#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */
#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/
#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */
-#define VIRTIO_BLK_F_FLUSH 9 /* Cache flush command support */
+#define VIRTIO_BLK_F_WCE 9 /* Writeback mode enabled after reset */
#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */
+#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in config */
+
+#ifndef __KERNEL__
+/* Old (deprecated) name for VIRTIO_BLK_F_WCE. */
+#define VIRTIO_BLK_F_FLUSH VIRTIO_BLK_F_WCE
+#endif
#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */
@@ -69,6 +75,8 @@ struct virtio_blk_config {
/* optimal sustained I/O size in logical blocks. */
__u32 opt_io_size;
+ /* writeback mode (if VIRTIO_BLK_F_CONFIG_WCE) */
+ __u8 wce;
} __attribute__((packed));
/*