On Friday 17 January 2020 12:22:54 Jan Kara wrote: > On Thu 16-01-20 16:46:43, Pali Rohár wrote: > > On Monday 13 January 2020 12:48:38 Jan Kara wrote: > > > On Sun 12-01-20 15:47:35, Pali Rohár wrote: > > > > So I think that UDF 2.60 is clear that for CD-RW medias (formatted in > > > > normal or MRW mode) should be used Overwritable access type. But all > > > > mentioned tools were probably written prior to existence of UDF 2.60 > > > > specifications, probably targeting only UDF 1.50 versions at that time. > > > > > > > > I checked that they use Unallocated Space Bitmap (and not Freed Space > > > > Bitmap), so writing to these filesystems should not be a problem. > > > > > > > > How to handle this situation? UDF 2.01 nor 1.50 does not say anything > > > > for access type on CD-RW and there are already tools which generates UDF > > > > 1.50 images which does not matches UDF 2.60 requirements. > > > > > > > > I think that the best would be to relax restrictions added in commit > > > > b085fbe2ef7fa to allow mounting mounting udf fs with rewritable access > > > > type in R/W mode if Freed Space Bitmap/Table is not used. > > > > > > > > I'm really not sure if existing udf implementations take CD-RW media > > > > with overwritable media type. E.g. prehistoric wrudf tool refuse to work > > > > with optical discs which have overwritable access type. I supports only > > > > UDF 1.50. > > > > > > Yeah, we should maintain compatibility with older tools where sanely > > > possible. So I agree with what you propose. Allow writing to > > > PD_ACCESS_TYPE_REWRITABLE disks if they don't use 'Freed Space > > > Bitmap/Table'. Will you send a patch or should I do the update? > > > > Could you do it, please? > > Sure, attached. Looks good, just you have specified wrong MIME enc: charset=iso-8859-1 It should be UTF-8. You can add my Reviewed-by keyword. -- Pali Rohár pali.rohar@xxxxxxxxx
