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| author | Richard W.M. Jones <rjones@redhat.com> | 2012-07-26 18:25:06 +0100 |
|---|---|---|
| committer | Richard W.M. Jones <rjones@redhat.com> | 2012-07-26 18:33:37 +0100 |
| commit | fe2253088ff51b51e2586f27a9408a38655170e3 (patch) | |
| tree | a4b24b0fe395a715cda5e6930adcba66715b0c5f | |
| parent | 0f837ec068783a6318ba6f7490b567566bce2aa4 (diff) | |
| download | libguestfs-fe2253088ff51b51e2586f27a9408a38655170e3.tar.gz libguestfs-fe2253088ff51b51e2586f27a9408a38655170e3.tar.xz libguestfs-fe2253088ff51b51e2586f27a9408a38655170e3.zip | |
appliance: Add '-drive detect-zero=on' flag if qemu supports it.
NB: The patch to implement this feature in qemu is not upstream, and
may never make it upstream. However this is so useful for
virt-sparsify that I decided to add this to libguestfs while we see
what qemu decides to do.
| -rw-r--r-- | src/launch-appliance.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/launch-appliance.c b/src/launch-appliance.c index 328cd196..bad9cb70 100644 --- a/src/launch-appliance.c +++ b/src/launch-appliance.c @@ -942,11 +942,12 @@ qemu_drive_param (guestfs_h *g, const struct drive *drv, size_t index) else iface = "virtio"; - snprintf (&r[i], len-i, "%s%s%s%s,id=hd%zu,if=%s", + snprintf (&r[i], len-i, "%s%s%s%s%s,id=hd%zu,if=%s", drv->readonly ? ",snapshot=on" : "", drv->use_cache_none ? ",cache=none" : "", drv->format ? ",format=" : "", drv->format ? drv->format : "", + qemu_supports (g, "detect-zero") ? ",detect-zero=on" : "", index, iface); |