On Thursday 24 January 2008 03:56:50 Christian Borntraeger wrote:
> Rusty,
>
> I currently try to make my guest boot from an virtio root device
> without having an external kernel. Some of the tools that I tried
> expect HDIO_GETGEO to work. The most interesting value is likely
> the geo.start value to get the offset of a partition. This value
> is filled by block/ioctl.c if fops->getgeo is set. This patch also
> fills in some standard values for heads, sectors and cylinders.
>
> Makes sense?
Perfect sense, applied.
I wonder if there's a standard helper for this?
> +/* We provide getgeo only to please some old bootloader/partitioning tools
> */ +static int virtblk_getgeo(struct block_device *bd, struct hd_geometry
> *geo) +{
> + /* some standard values, similar to sd */
> + geo->heads = 1 << 6;
> + geo->sectors = 1 << 5;
> + geo->cylinders = get_capacity(bd->bd_disk) >> 11;
> + return 0;
> +}
Thanks,
Rusty.
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