On 10/23/2012 08:07 AM, Rusty Russell wrote: > "Michael S. Tsirkin" <[email protected]> writes: >> On Thu, Oct 18, 2012 at 02:50:56PM +1030, Rusty Russell wrote: >>> Asias He <[email protected]> writes: >>>>>> +#define BLK_HDR 0 >>>>> >>>>> What's this for, exactly? Please add a comment. >>>> >>>> The block headr is in the first and separate buffer. >>> >>> Please don't assume this! We're trying to fix all the assumptions in >>> qemu at the moment. >>> >>> vhost_net handles this correctly, taking bytes off the descriptor chain >>> as required. >>> >>> Thanks, >>> Rusty. >> >> BTW are we agreed on the spec update that makes cmd 32 bytes? > > vhost-blk doesn't handle scsi requests, does it?
No, it doesn't handle scsi requests currently. > > But since we're forced to use a feature bit, we could just put the cmd > size in explicitly. Though Paulo seems convinced that 32 is always > sufficient. Whoever implements it gets to decide... > > Here's my TODO list: > 1) Create qemu helpers to efficiently handle iovecs. > 2) Switch all the qemu devices to use them. > 3) ... except a special hack for virtio-blk in old-layout mode. > 4) Implement pci capability layout RFC for qemu. > - Detect whether guest uses capabilities. > - Device config in new mode is le. > - Add strict checking mode for extra compliance checks? > 5) Add explicit size-based accessors to virtio_config in kernel. > 6) Update pci capability RFC patches for linux to match. > - Use explicit accessors to allow for endian conversion. > 6) Push virtio torture patch to test variable boundaries. > 7) Update spec. > > That should keep me amused for a while... > > Cheers, > Rusty. > -- Asias _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
