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author | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-03-28 17:28:41 +0000 |
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committer | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-03-28 17:28:41 +0000 |
commit | 221f715d90ec5fec569a19119887445c037bca86 (patch) | |
tree | 01d6f162df77773cf09c6193c6dc84219f297370 /vnc.h | |
parent | 64a7fde8e85fbadb0dadee6ed1c293cd86f5fb29 (diff) |
new scsi-generic abstraction, use SG_IO (Christoph Hellwig)
Okay, I started looking into how to handle scsi-generic I/O in the
new world order.
I think the best is to use the SG_IO ioctl instead of the read/write
interface as that allows us to support scsi passthrough on disk/cdrom
devices, too. See Hannes patch on the kvm list from August for an
example.
Now that we always do ioctls we don't need another abstraction than
bdrv_ioctl for the synchronous requests for now, and for asynchronous
requests I've added a aio_ioctl abstraction keeping it simple.
Long-term we might want to move the ops to a higher-level abstraction
and let the low-level code fill out the request header, but I'm lazy
enough to leave that to the people trying to support scsi-passthrough
on a non-Linux OS.
Tested lightly by issuing various sg_ commands from sg3-utils in a guest
to a host CDROM device.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6895 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'vnc.h')
0 files changed, 0 insertions, 0 deletions