RE: [Xen-devel] [PATCH] vscsi and symlinks

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

With signed-off-by line :)

By default, vscsi expects to be passed the final device name (eg
/dev/st3) instead of one of the various udev symlinks (eg
/dev/tape/by-path/pci-0000:01:08.0-scsi-0:0:2:0-st). The following patch
resolves the path to the real path if the name starts with /dev/

Signed-off-by: James Harper <james.harper@xxxxxxxxxxxxxxxx>

--- a/tools/python/xen/util/vscsi_util.py  2010-12-03 23:26:46.391655087
+1100
+++ b/tools/python/xen/util/vscsi_util.py  2011-02-07 12:20:37.599527204
+1100
@@ -158,6 +158,8 @@


 def vscsi_get_hctl_and_devname_by(target, scsi_devices = None):
+    if target.startswith('/dev/'):
+        target = os.path.realpath(target)
     if scsi_devices is None:
         if len(target.split(':')) == 4:
             scsi_devices = _vscsi_get_scsidevices_by_lsscsi(target)



> -----Original Message-----
> From: Ian Jackson [mailto:Ian.Jackson@xxxxxxxxxxxxx]
> Sent: Tuesday, 8 February 2011 03:23
> To: James Harper
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] [PATCH] vscsi and symlinks
> 
> James Harper writes ("[Xen-devel] [PATCH] vscsi and symlinks"):
> > By default, vscsi expects to be passed the final device name (eg
> > /dev/st3) instead of one of the various udev symlinks (eg
> > /dev/tape/by-path/pci-0000:01:08.0-scsi-0:0:2:0-st). The following
patch
> > resolves the path to the real path if the name starts with /dev/
> 
> Thanks.  I would have applied this patch but you didn't provide a
> "signed-off-by", to confirm that your contribution is in accordance
> with the Developer's Certificate of Origin.
> 
> From Documentation/SubmittingPatches in the Linux kernel tree:
> 
>         Developer's Certificate of Origin 1.1
> 
>         By making a contribution to this project, I certify that:
> 
>         (a) The contribution was created in whole or in part by me and
I
>             have the right to submit it under the open source license
>             indicated in the file; or
> 
>         (b) The contribution is based upon previous work that, to the
best
>             of my knowledge, is covered under an appropriate open
source
>             license and I have the right under that license to submit
that
>             work with modifications, whether created in whole or in
part
>             by me, under the same open source license (unless I am
>             permitted to submit under a different license), as
indicated
>             in the file; or
> 
>         (c) The contribution was provided directly to me by some other
>             person who certified (a), (b) or (c) and I have not
modified
>             it.
> 
>         (d) I understand and agree that this project and the
contribution
>             are public and that a record of the contribution
(including all
>             personal information I submit with it, including my
sign-off) is
>             maintained indefinitely and may be redistributed
consistent with
>             this project or the open source license(s) involved.
> 
> Ian.

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