Re: Extended attributes support on udf file system
"王锋" <[email protected]> Fri, 20 Mar 2020 21:22:55 +0800
| Newsgroups | gmane.comp.audio.cd-record |
|---|---|
| Message-ID | <[email protected]> |
Hi Jörg, >> Hi all, >> >> Is there any tool which can create udf file system image supporting extended attributes? I tried mkudffs and mkisofs, but they all failed. > Hi, > what do you expect? > Since August 2006 mkisofs suports extended attributes for Mac OS. > Is this what you like? > Do you use the real mkisofs or one of the fake/outdated variants? On linux platform I'd like to create an udf image and mount it to a directory, then copy some files with extended attributes to the image. I hope the extended attributes to be reserved on the udf file system. The version of mkisofs I used is "mkisofs 3.02a10 2020/02/26 (x86_64-unknown-linux-gnu)". The following is what I did with mkisofs. #Check the version of mkisofs root@Ubuntu:x86_64-linux-gcc# ./mkisofs --version mkisofs 3.02a10 2020/02/26 (x86_64-unknown-linux-gnu) Copyright (C) 1993-1997 Eric Youngdale Copyright (C) 1997-2019 Joerg Schilling Copyright (C) 1997-2001 James Pearson Copyright (C) 2006 HELIOS Software GmbH #Set the extended attribute to the file. root@Ubuntu:x86_64-linux-gcc# setfattr -n "trusted.udf.test" -v "1234" ./100M-file root@Ubuntu:x86_64-linux-gcc# getfattr -d -m .* ./100M-file # file: 100M-file trusted.udf.test="1234" #Make the udf image file root@Ubuntu:x86_64-linux-gcc# ./mkisofs -o /tmp/a.udf -udf ./100M-file 9.69% done, estimate finish Fri Mar 20 21:09:54 2020 19.43% done, estimate finish Fri Mar 20 21:09:54 2020 29.10% done, estimate finish Fri Mar 20 21:09:54 2020 38.77% done, estimate finish Fri Mar 20 21:09:54 2020 48.44% done, estimate finish Fri Mar 20 21:09:54 2020 58.17% done, estimate finish Fri Mar 20 21:09:54 2020 67.84% done, estimate finish Fri Mar 20 21:09:54 2020 77.51% done, estimate finish Fri Mar 20 21:09:54 2020 87.18% done, estimate finish Fri Mar 20 21:09:54 2020 96.92% done, estimate finish Fri Mar 20 21:09:54 2020 Total translation table size: 0 Total rockridge attributes bytes: 0 Total directory bytes: 0 Path table size(bytes): 10 Max brk space used 0 51618 extents written (100 MB) root@Ubuntu:x86_64-linux-gcc# mount /tmp/a.udf /mnt mount: block device /tmp/a.udf is write-protected, mounting read-only #Check the extended the attribute after mount the image file. But we got nothing. root@Ubuntu:x86_64-linux-gcc# getfattr -d -m .* /mnt/100M-file root@Ubuntu:x86_64-linux-gcc# The extended attribute is lost. ------- For the mkudffs I got the error with "Operation not supported" message. root@Ubuntu:x86_64-linux-gcc# mkudffs -h mkudffs 1.0.0b2 for UDF FS 1.0.0-cvs, 2002/02/09 root@Ubuntu:x86_64-linux-gcc# truncate -s 150M a.udf root@Ubuntu:x86_64-linux-gcc# mkudffs ./a.udf start=0, blocks=16, type=RESERVED start=16, blocks=3, type=VRS start=19, blocks=237, type=USPACE start=256, blocks=1, type=ANCHOR start=257, blocks=16, type=PVDS start=273, blocks=1, type=LVID start=274, blocks=76269, type=PSPACE start=76543, blocks=1, type=ANCHOR start=76544, blocks=239, type=USPACE start=76783, blocks=16, type=RVDS start=76799, blocks=1, type=ANCHOR root@Ubuntu:x86_64-linux-gcc# getfattr -d -m .* ./100M-file # file: 100M-file trusted.udf.test="1234" root@Ubuntu:x86_64-linux-gcc# cp --preserve ./100M-file /mnt/ root@Ubuntu:x86_64-linux-gcc# getfattr -d -m .* /mnt/100M-file root@Ubuntu:x86_64-linux-gcc# setfattr -n "trusted.udf.test" -v "1234" /mnt/100M-file setfattr: /mnt/100M-file: Operation not supported According to the specification of UDF version 2.01, this feature should be supported. Is there something wrong with what I did? Best Regards, WF