[Xen-devel] [PATCH, v2] fix "xm block-detach 0 ..." for extended-ID devices

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

Simply taking stat()'s st_rdev doesn't work here, as the minor is
split into two parts, the major is present, and the "extended" bit
isn't set.

Rather than fixing this in a way that would likely be OS-dependent,
simply remove the access to the device file, and instead just parse
the provided string (as is done e.g. for block-attach).

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- a/tools/python/xen/util/blkif.py
+++ b/tools/python/xen/util/blkif.py
@@ -19,11 +19,6 @@ def blkdev_name_to_number(name):
     devname = 'virtual-device'
     devnum = None
 
-    try:
-        return (devname, os.stat(n).st_rdev)
-    except Exception, ex:
-        pass
-
     scsi_major = [ 8, 65, 66, 67, 68, 69, 70, 71, 128, 129, 130, 131, 132, 
133, 134, 135 ]
     if re.match( '/dev/sd[a-z]([1-9]|1[0-5])?$', n):
         major = scsi_major[(ord(n[7:8]) - ord('a')) / 16]

Attachment: blkif-dev-to-num.patch
Description: Text document

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