[Libguestfs] [PATCH v3 2/6] v2v: ova: don't detect compressed disks, read the OVF instead

The information whether the disk is gzip compressed or not is stored in the OVF. There is no reason to do the detection. Signed-off-by: Tomáš Golembiovský <tgolembi(a)redhat.com&gt; --- v2v/input_ova.ml | 28 +++++++++++++++++----------- v2v/test-v2v-i-ova-gz.ovf | 2 +- 2 files changed, 18 insertions(+), 12 deletions(-) diff --git a/v2v/input_ova.ml b/v2v/input_ova.ml index b283629..61930f0 100644 --- a/v2v/input_ova.ml +++ b/v2v/input_ova.ml @@ -275,6 +275,13 @@ object | None -> error (f_"no href in ovf:File (id=%s)") file_ref | Some s -> s in + let expr = sprintf "/ovf:Envelope/ovf:References/ovf:File[@ovf:id='%s']/@ovf:compression" file_ref in + let compressed = + match xpath_string expr with + | None | Some "identity" -> false + | Some "gzip" -> true + | Some s -> error (f_"unsupported compression in OVF: %s") s in + (* Does the file exist and is it readable? *) let filename = ovf_folder // filename in Unix.access filename [Unix.R_OK]; @@ -282,17 +289,16 @@ object (* The spec allows the file to be gzip-compressed, in which case * we must uncompress it into the tmpdir. *) - let filename = - if detect_file_type filename = `GZip then ( - let new_filename = tmpdir // String.random8 () ^ ".vmdk" in - let cmd = - sprintf "zcat %s > %s" (quote filename) (quote new_filename) in - if shell_command cmd <> 0 then - error (f_"error uncompressing %s, see earlier error messages") - filename; - new_filename - ) - else filename in + let filename = if compressed then ( + let new_filename = tmpdir // String.random8 () ^ ".vmdk" in + let cmd = + sprintf "zcat %s > %s" (quote filename) (quote new_filename) in + if shell_command cmd <> 0 then + error (f_"error uncompressing %s, see earlier error messages") + filename; + new_filename + ) + else filename in let disk = { s_disk_id = i; diff --git a/v2v/test-v2v-i-ova-gz.ovf b/v2v/test-v2v-i-ova-gz.ovf index e10ad2b..4a03e85 100644 --- a/v2v/test-v2v-i-ova-gz.ovf +++ b/v2v/test-v2v-i-ova-gz.ovf @@ -1,7 +1,7 @@ <?xml version="1.0" encoding="UTF-8"?> <Envelope vmw:buildId="build-1750787" xmlns="http://schemas.dmtf.org/ovf/envelope/1" xmlns:cim="http://schemas.dmtf.org/wbem/wscim/1/common" xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1" xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_Re... xmlns:vmw="http://www.vmware.com/schema/ovf" xmlns:vssd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_Vi... xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <References> - <File ovf:href="disk1.vmdk.gz" ovf:id="file1" ovf:size="7804077568"/> + <File ovf:href="disk1.vmdk.gz" ovf:id="file1" ovf:size="7804077568" ovf:compression="gzip"/> </References> <DiskSection> <Info>Virtual disk information</Info> -- 2.10.2