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launch: appliance: Disable virtio-scsi if qemu <= 1.1.

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Debian Wheezy (7) ships with old qemu 1.1 which claims to support
virtio-scsi but in reality it's broken.

Disable virtio-scsi in this case.
This commit is contained in:
Richard W.M. Jones
2012-12-13 10:46:22 +00:00
parent 9508b750fd
commit 14c7e9e52a
1 changed files with 16 additions and 6 deletions
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22
src/launch-appliance.c
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@@ -914,6 +914,11 @@ qemu_supports_virtio_scsi (guestfs_h *g)
{
int r;
if (!g->app.qemu_help) {
if (test_qemu (g) == -1)
return 0; /* safe option? */
}
/* g->app.virtio_scsi has these values:
* 0 = untested (after handle creation)
* 1 = supported
@@ -921,13 +926,18 @@ qemu_supports_virtio_scsi (guestfs_h *g)
* 3 = test failed (use virtio-blk)
*/
if (g->app.virtio_scsi == 0) {
r = qemu_supports_device (g, "virtio-scsi-pci");
if (r > 0)
g->app.virtio_scsi = 1;
else if (r == 0)
/* qemu 1.1 claims to support virtio-scsi but in reality it's broken. */
if (g->app.qemu_version_major == 1 && g->app.qemu_version_minor < 2)
g->app.virtio_scsi = 2;
else
g->app.virtio_scsi = 3;
else {
r = qemu_supports_device (g, "virtio-scsi-pci");
if (r > 0)
g->app.virtio_scsi = 1;
else if (r == 0)
g->app.virtio_scsi = 2;
else
g->app.virtio_scsi = 3;
}
}
return g->app.virtio_scsi == 1;