Re: [Libguestfs] [PATCH v2v v3 1/2] rhv-upload: Validate UUIDs passed to -oo rhv-disk-uuid (RHBZ#1789279)

The validation helps us fail early and with a sensible error message. The NIL UUID is not valid for oVirt, but other than that there is no other logic in there merely because the UUID types are a matter of the generator and they are just forwarded in this partucular case. Signed-off-by: Martin Kletzander <mkletzan(a)redhat.com&gt; --- v2v/output_rhv_upload.ml | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/v2v/output_rhv_upload.ml b/v2v/output_rhv_upload.ml index 9e60d8c73150..e833569318b3 100644 --- a/v2v/output_rhv_upload.ml +++ b/v2v/output_rhv_upload.ml @@ -49,6 +49,16 @@ after their uploads (if you do, you must supply one for each disk): -oo rhv-disk-uuid=UUID Disk UUID ") +let is_nonnil_uuid uuid = + let nil_uuid = "00000000-0000-0000-0000-000000000000" in + let rex_uuid = lazy ( + let hex = "[a-fA-F0-9]" in + let str = sprintf "^%s{8}-%s{4}-%s{4}-%s{4}-%s{12}$" hex hex hex hex hex in + PCRE.compile str + ) in + if uuid = nil_uuid then false + else PCRE.matches (Lazy.force rex_uuid) uuid + let parse_output_options options = let rhv_cafile = ref None in let rhv_cluster = ref None in @@ -71,6 +81,8 @@ let parse_output_options options = | "rhv-verifypeer", "" -> rhv_verifypeer := true | "rhv-verifypeer", v -> rhv_verifypeer := bool_of_string v | "rhv-disk-uuid", v -> + if not (is_nonnil_uuid v) then + error (f_"-o rhv-upload: invalid UUID for -oo rhv-disk-uuid"); rhv_disk_uuids := Some (v :: (Option.default [] !rhv_disk_uuids)) | k, _ -> error (f_"-o rhv-upload: unknown output option ‘-oo %s’") k --