On Dec 13, 2010 5:14 AM, "अनुज" <anu...@gmail.com> wrote: > > Hi > > I am trying to implement VirtIO support for a proprietary OS. And It > would be great if I am able to process SCSI commands over VirtIO Block > device. > > I tried to execute INQUIRY command but the status returned is UNSUPPORTED. > If anyone provide example VirtIO SCSI Command request structure for > INQUIRY command as per VirtIO spec Appendix D would be a great help. > > And also, the paragraph from VirtIO spec - 0.8.9 is confusing for me : > > "Historically, devices assumed that the fields type, ioprio and > sector reside in > a single, separate read-only buffer; the fields errors, data_len, sense_len and > residual reside in a single, separate write-only buffer; the sense > eld in a separate > write-only buffer of size 96 bytes, by itself; the fields errors, > data_len, sense_len > and residual in a single write-only buffer; and the status field is a > separate readonly > buffer of size 1 byte, by itself." > > Here 'status field of buffer size 1 byte' is whether readonly or writeonly?
Writeonly > > I want to know from which version of Qemu-kvm supports processing of > scsi commands over VirtIO block device as a backend. > Although I checked the Host Feature fields in which VIRTIO_BLK_F_SCSI > bit is set. I am using qemu-kvm version 0.12.3. Make sure you have a scsi-generic block device in qemu-kvm, not just a regular file or physical block device. Open /dev/sg. Look at hw/virtio-blk.c in qemu-kvm for host implementation details. > > -- > Anuj Aggarwal > > .''`. > : :Ⓐ : # apt-get install hakuna-matata > `. `'` > `- >
