[libvirt] [PATCH] libxl: add discard support to libxl_device_disk
Translate libvirt discard settings into libxl-4.5 discard settings.
Signed-off-by: Olaf Hering <olaf(a)aepfle.de>
---
default means leave decision to libxl.
Not sure if that is what "default" in libvirt terms really means.
src/libxl/libxl_conf.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
index b7fed7f..4cb062e 100644
--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -713,6 +713,33 @@ libxlMakeDomBuildInfo(virDomainObjPtr vm, libxl_domain_config
*d_config)
return -1;
}
+static void
+libxlDiskSetDiscard(libxl_device_disk *x_disk, int discard)
+{
+ if (!x_disk->readwrite)
+ return;
+#if defined(LIBXL_HAVE_LIBXL_DEVICE_DISK_DISCARD_ENABLE)
+ switch (discard) {
+ case VIR_DOMAIN_DISK_DISCARD_DEFAULT:
+ break;
+ case VIR_DOMAIN_DISK_DISCARD_UNMAP:
+ libxl_defbool_set(&x_disk->discard_enable, true);
+ break;
+ default:
+ case VIR_DOMAIN_DISK_DISCARD_IGNORE:
+ libxl_defbool_set(&x_disk->discard_enable, false);
+ break;
+ }
+#else
+ if (discard == VIR_DOMAIN_DISK_DISCARD_DEFAULT)
+ return;
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("This version of libxenlight does not support "
+ "discard= option passing"));
+#endif
+}
+
+
int
libxlMakeDisk(virDomainDiskDefPtr l_disk, libxl_device_disk *x_disk)
{
@@ -827,6 +854,7 @@ libxlMakeDisk(virDomainDiskDefPtr l_disk, libxl_device_disk *x_disk)
x_disk->removable = 1;
x_disk->readwrite = !l_disk->readonly;
x_disk->is_cdrom = l_disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM ? 1 : 0;
+ libxlDiskSetDiscard(x_disk, l_disk->discard);
/* An empty CDROM must have the empty format, otherwise libxl fails. */
if (x_disk->is_cdrom && !x_disk->pdev_path)
x_disk->format = LIBXL_DISK_FORMAT_EMPTY;