libvirt/libxl-support-block-script.patch

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libxl: set script field of libxl_device_disk
Add a hack to the libvirt libxl driver to set
libxl_device_disk->script when the disk configuration starts
with some well-known Xen external block scripts: dmmd, drbd,
and npiv.
For more details, see bsc#954872 and FATE#319810
Index: libvirt-7.3.0/src/libxl/libxl_conf.c
===================================================================
--- libvirt-7.3.0.orig/src/libxl/libxl_conf.c
+++ libvirt-7.3.0/src/libxl/libxl_conf.c
@@ -917,6 +917,22 @@ libxlDiskSetDiscard(libxl_device_disk *x
#endif
}
+static int
+libxlDiskSetScript(libxl_device_disk *x_disk, const char *disk_spec)
+{
+ if (disk_spec == NULL)
+ return 0;
+
+ if (STRPREFIX(disk_spec, "dmmd:"))
+ x_disk->script = g_strdup("block-dmmd");
+ else if (STRPREFIX(disk_spec, "drbd:"))
+ x_disk->script = g_strdup("block-drbd");
+ else if (STRPREFIX(disk_spec, "npiv:"))
+ x_disk->script = g_strdup("block-npiv");
+
+ return 0;
+}
+
static void
libxlDiskSetCacheMode(libxl_device_disk *x_disk, int cachemode)
{
@@ -1058,6 +1074,7 @@ libxlMakeNetworkDiskSrc(virStorageSource
int
libxlMakeDisk(virDomainDiskDef *l_disk, libxl_device_disk *x_disk)
{
+ const char *src = virDomainDiskGetSource(l_disk);
const char *driver = virDomainDiskGetDriver(l_disk);
int format = virDomainDiskGetFormat(l_disk);
int actual_type = virStorageSourceGetActualType(l_disk->src);
@@ -1073,7 +1090,7 @@ libxlMakeDisk(virDomainDiskDef *l_disk,
if (libxlMakeNetworkDiskSrc(l_disk->src, &x_disk->pdev_path) < 0)
return -1;
} else {
- x_disk->pdev_path = g_strdup(virDomainDiskGetSource(l_disk));
+ x_disk->pdev_path = g_strdup(src);
}
x_disk->vdev = g_strdup(l_disk->dst);
@@ -1184,6 +1201,9 @@ libxlMakeDisk(virDomainDiskDef *l_disk,
if (libxlDiskSetDiscard(x_disk, l_disk->discard) < 0)
return -1;
libxlDiskSetCacheMode(x_disk, l_disk->cachemode);
+ if (libxlDiskSetScript(x_disk, src) < 0)
+ return -1;
+
/* 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;