Re: [Xen-devel] [PATCH v7] libxl: allow 'phy' backend to use empty files

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

El 19/2/16 a les 19:01, Roger Pau Monne ha escrit:
> This was introduced by 97ee1f (~5 years ago), but was probably never
> surfaced because most people used regular files as CDROM images, so the PHY
> backend was actually never selected. A year ago this was changed, and now
> regular RAW files are also handled by the PHY backend, which has made this
> bug suface.
> 
> Fix it by allowing empty disks to use the PHY backend, skipping the stat
> tests.
> 
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> Reported-by: Alex Braunegg <alex.braunegg@xxxxxxxxx>
> ---
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> Cc: Alex Braunegg <alex.braunegg@xxxxxxxxx>
> ---
> Changes since v6:
>  - Turn the assert into a check at libxl__device_disk_set_backend.
> 
> Changes since v4:
>  - Split form the rest of the series.
>  - Fix disk_try_backend.

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