File libvirt.libxl-Add-support-for-block-dmmd-drbd-npiv-scripts.patch of Package libvirt

From: "jfehlig@suse.com" <jfehlig@suse.com>
Date: Thu, 18 Feb 2016 16:49:00 +0000
Subject: libxl: Add support for block-{dmmd,drbd,npiv} scripts

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
---
 src/libxl/libxl_conf.c | 23 ++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -1051,24 +1051,43 @@ libxlDiskSetDiscard(libxl_device_disk *x_disk, virDomainDiskDiscard discard)
     case VIR_DOMAIN_DISK_DISCARD_DEFAULT:
     case VIR_DOMAIN_DISK_DISCARD_LAST:
         break;
     case VIR_DOMAIN_DISK_DISCARD_UNMAP:
         libxl_defbool_set(&x_disk->discard_enable, true);
         break;
     case VIR_DOMAIN_DISK_DISCARD_IGNORE:
         libxl_defbool_set(&x_disk->discard_enable, false);
         break;
     }
 }
 
+static void
+libxlDiskSetScript(libxl_device_disk *x_disk, const char *disk_spec)
+{
+    const char *p = NULL;
+
+    if (disk_spec == NULL)
+        return;
+
+    if (STRPREFIX(disk_spec, "dmmd:"))
+        p = "block-dmmd";
+    else if (STRPREFIX(disk_spec, "drbd:"))
+        p = "block-drbd";
+    else if (STRPREFIX(disk_spec, "npiv:"))
+        p = "block-npiv";
+
+    if (p)
+        x_disk->script = g_strdup("block-dmmd");
+}
+
 static char *
 libxlMakeNetworkDiskSrcStr(virStorageSource *src,
                            const char *username,
                            const char *secret)
 {
     g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
     size_t i;
 
     switch (src->protocol) {
     case VIR_STORAGE_NET_PROTOCOL_NBD:
     case VIR_STORAGE_NET_PROTOCOL_HTTP:
     case VIR_STORAGE_NET_PROTOCOL_HTTPS:
@@ -1167,38 +1186,39 @@ libxlMakeNetworkDiskSrc(virStorageSource *src, char **srcstr)
     *srcstr = libxlMakeNetworkDiskSrcStr(src, username, base64secret);
     virSecureEraseString(base64secret);
 
     if (!*srcstr)
         return -1;
 
     return 0;
 }
 
 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);
     virStorageType actual_type = virStorageSourceGetActualType(l_disk->src);
 
     if (actual_type == VIR_STORAGE_TYPE_NETWORK) {
         if (STRNEQ_NULLABLE(driver, "qemu")) {
             virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                            _("only the 'qemu' driver can be used with network disks"));
             return -1;
         }
         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);
 
     if (driver) {
         if (STREQ(driver, "tap") || STREQ(driver, "tap2")) {
             switch (format) {
             case VIR_STORAGE_FILE_QCOW:
                 x_disk->format = LIBXL_DISK_FORMAT_QCOW;
                 x_disk->backend = LIBXL_DISK_BACKEND_QDISK;
                 break;
             case VIR_STORAGE_FILE_QCOW2:
@@ -1281,24 +1301,25 @@ libxlMakeDisk(virDomainDiskDef *l_disk, libxl_device_disk *x_disk)
          * xl-disk-configuration.txt in the xen documentation and let
          * libxl pick a suitable backend.
          */
         x_disk->format = LIBXL_DISK_FORMAT_RAW;
         x_disk->backend = LIBXL_DISK_BACKEND_UNKNOWN;
     }
 
     /* XXX is this right? */
     x_disk->removable = 1;
     x_disk->readwrite = !l_disk->src->readonly;
     x_disk->is_cdrom = l_disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM ? 1 : 0;
     libxlDiskSetDiscard(x_disk, l_disk->discard);
+    libxlDiskSetScript(x_disk, src);
     /* 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;
     if (l_disk->transient) {
         virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                        _("libxenlight does not support transient disks"));
         return -1;
     }
 
     x_disk->backend_domname = g_strdup(l_disk->domain_name);
 
     return 0;