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-rw-r--r--include/xen/interface/io/blkif.h37
1 files changed, 32 insertions, 5 deletions
diff --git a/include/xen/interface/io/blkif.h b/include/xen/interface/io/blkif.h
index c2d1fa4dc1e..61e523af3c4 100644
--- a/include/xen/interface/io/blkif.h
+++ b/include/xen/interface/io/blkif.h
@@ -51,11 +51,7 @@ typedef uint64_t blkif_sector_t;
*/
#define BLKIF_MAX_SEGMENTS_PER_REQUEST 11
-struct blkif_request {
- uint8_t operation; /* BLKIF_OP_??? */
- uint8_t nr_segments; /* number of segments */
- blkif_vdev_t handle; /* only for read/write requests */
- uint64_t id; /* private guest value, echoed in resp */
+struct blkif_request_rw {
blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */
struct blkif_request_segment {
grant_ref_t gref; /* reference to I/O buffer frame */
@@ -65,6 +61,16 @@ struct blkif_request {
} seg[BLKIF_MAX_SEGMENTS_PER_REQUEST];
};
+struct blkif_request {
+ uint8_t operation; /* BLKIF_OP_??? */
+ uint8_t nr_segments; /* number of segments */
+ blkif_vdev_t handle; /* only for read/write requests */
+ uint64_t id; /* private guest value, echoed in resp */
+ union {
+ struct blkif_request_rw rw;
+ } u;
+};
+
struct blkif_response {
uint64_t id; /* copied from request */
uint8_t operation; /* copied from request */
@@ -91,4 +97,25 @@ DEFINE_RING_TYPES(blkif, struct blkif_request, struct blkif_response);
#define VDISK_REMOVABLE 0x2
#define VDISK_READONLY 0x4
+/* Xen-defined major numbers for virtual disks, they look strangely
+ * familiar */
+#define XEN_IDE0_MAJOR 3
+#define XEN_IDE1_MAJOR 22
+#define XEN_SCSI_DISK0_MAJOR 8
+#define XEN_SCSI_DISK1_MAJOR 65
+#define XEN_SCSI_DISK2_MAJOR 66
+#define XEN_SCSI_DISK3_MAJOR 67
+#define XEN_SCSI_DISK4_MAJOR 68
+#define XEN_SCSI_DISK5_MAJOR 69
+#define XEN_SCSI_DISK6_MAJOR 70
+#define XEN_SCSI_DISK7_MAJOR 71
+#define XEN_SCSI_DISK8_MAJOR 128
+#define XEN_SCSI_DISK9_MAJOR 129
+#define XEN_SCSI_DISK10_MAJOR 130
+#define XEN_SCSI_DISK11_MAJOR 131
+#define XEN_SCSI_DISK12_MAJOR 132
+#define XEN_SCSI_DISK13_MAJOR 133
+#define XEN_SCSI_DISK14_MAJOR 134
+#define XEN_SCSI_DISK15_MAJOR 135
+
#endif /* __XEN_PUBLIC_IO_BLKIF_H__ */