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xen-blkfront: handle Xen major numbers other than XENVBD

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This patch makes sure blkfront handles correctly virtual device numbers
corresponding to Xen emulated IDE and SCSI disks: in those cases
blkfront translates the major number to XENVBD and the minor number to a
low xvd minor.

Note: this behaviour is different from what old xenlinux PV guests used
to do: they used to steal an IDE or SCSI major number and use it
instead.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
This commit is contained in:
Stefano Stabellini
2010-12-02 17:55:00 +00:00
parent cff520b9c2
commit c80a420995
2 changed files with 95 additions and 5 deletions
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21
include/xen/interface/io/blkif.h
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@ -91,4 +91,25 @@ 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__ */