Re: [SeaBIOS] [PATCH] Support for booting from virtio disks

[Gleb Natapov]

On Sun, May 09, 2010 at 05:31:16PM +0100, Stefan Hajnoczi wrote:
> On Sun, May 9, 2010 at 4:23 PM, Gleb Natapov  wrote:
> Neat!  I believe SeaBIOS will see virtio-blk devices as harddisks and
> not attempt to boot ISOs?  Many existing OS installers probably cannot
> boot from virtio-blk, but in the longer term folks might like to get
> rid of ATAPI CD-ROMs in their VMs.

The patch assumes that all virtio-blk devices are disks and it can boot
from any of virtio-blk disks if there is more then one. I am not sure
CDROM can be attached via virtio-blk interface.
> > char *desc = malloc_tmphigh(MAXDESCSIZE);
> > struct virtiodrive_s *vdrive_g = malloc_fseg(sizeof(*vdrive_g));
> > struct vring_virtqueue *vq = malloc_low(sizeof(*vq));
> > if (!vdrive_g || !desc || !vq) {
> > warn_noalloc();
> > return;
> > }
>
> [...]
> > if (vp_find_vq(ioaddr, 0, vdrive_g->vq) < 0 ) {
> > free(vdrive_g);
> > dprintf(1, "fail to find vq for virtio-blk %x:%x\n",
> > pci_bdf_to_bus (bdf), pci_bdf_to_dev(bdf));
> > continue;
> > }
>
> Are desc, vdrive_g, and/or vq getting leaked on error?

vdrive_g is freed, but desc and vq are leaked. Will fix. Thanks!