On 12/14/2012 08:45 AM, Osier Yang wrote:
> Just like for domain starting, this sets the disk's unpriv_sgio
> if cdbfilter is specified when attaching disk.
> ---
> src/qemu/qemu_driver.c | 23 +++++++++++++++++------
> 1 files changed, 17 insertions(+), 6 deletions(-)
> +
> + /* Set sysfs unpriv_sgio if cdbfilter is specified. */
> + if (disk->cdbfilter) {
> + if (virSetDeviceUnprivSGIO(disk->src, NULL,
> + (disk->cdbfilter ==
> + VIR_DOMAIN_DISK_CDB_FILTER_NO)
> + ? 1 : 0) < 0) {
> + VIR_WARN("Failed to set unpriv_sgio of disk '%s'", disk->src);
> + goto end;
> + }
> + }
Again, does this do the right thing if some other domain already had
cdbfilter='no' (aka kernel allows SG_IO) but this domain omitted the
cdbfilter attribute (which defaults to cdbfilter='yes' but does not
satisfy the if(disk->cdbfilter) condition)? I suspect that will be
worked out when you rework things to use a tri-state rawio.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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