Xen devel - Jul 2008 - [PATCH]linux/blkfront: Add "media" file to vbd sysfs directory

Patch adds "media" file to the vbd sysfs directory.  File contains a
string,  cdrom or disk.

Currently all PV vbd devices are seen by HAL as "disk".  Applications
that query HAL info.capabilities attribute to determine a block devices
capabilities fail to see a PV cdrom as having CDROM capabilities. With
the attached patch and a small corresponding patch to HAL, applications
that query HAL for the storage type of the block device will see it as a
disk or a cdrom.  Standard Linux IDE devices use this same mechanism.

lshal of vbd without patches:
     info.capabilities = {''storage'',
''block''} (string list)
lshal of vbd with patches:
    info.capabilities = {''storage'', ''block'',
''storage.cdrom''} (string list)

Please apply to tip of linux-2.6.18-xen.hg

Signed-off-by: Pat Campbell  <plc@novell.com>




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