[PATCH 1/2] util: storage: Link to knowledge base when reporting missing image backing format

[Peter Krempa <pkrempa@xxxxxxxxxx>]

Mention the knowledge base article which has tips how to fix the backing
chain to work with current libvirt.

Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/util/virstoragefile.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index e46ac99219..1397f532fd 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -4979,7 +4979,8 @@ virStorageFileGetMetadataRecurse(virStorageSourcePtr src,
              */
             if (report_broken) {
                 virReportError(VIR_ERR_OPERATION_INVALID,
-                               _("format of backing image '%s' of image '%s' was not specified in the image metadata"),
+                               _("format of backing image '%s' of image '%s' was not specified in the image metadata "
+                                 "(See https://libvirt.org/kbase/backing_chains.html for troubleshooting)"),
                                src->backingStoreRaw, NULLSTR(src->path));
                 return -1;
             }
-- 
2.24.1

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