xen/blkback: correctly respond to unknown, non-native requests

[linux-drm-fsl-dcu.git] / include / xen / interface / io / blkif.h

diff --git a/include/xen/interface/io/blkif.h b/include/xen/interface/io/blkif.h
index 01c3d62436ef8c44c4d0deffc3393bd2d02b8116..ffd4652de91ca390fff537f18f524300bf470246 100644 (file)
--- a/include/xen/interface/io/blkif.h
+++ b/include/xen/interface/io/blkif.h
@@ -138,11 +138,21 @@ struct blkif_request_discard {
        uint8_t        _pad3;
 } __attribute__((__packed__));
 
+struct blkif_request_other {
+       uint8_t      _pad1;
+       blkif_vdev_t _pad2;        /* only for read/write requests         */
+#ifdef CONFIG_X86_64
+       uint32_t     _pad3;        /* offsetof(blkif_req..,u.other.id)==8*/
+#endif
+       uint64_t     id;           /* private guest value, echoed in resp  */
+} __attribute__((__packed__));
+
 struct blkif_request {
        uint8_t        operation;    /* BLKIF_OP_???                         */
        union {
                struct blkif_request_rw rw;
                struct blkif_request_discard discard;
+               struct blkif_request_other other;
        } u;
 } __attribute__((__packed__));