Re: cross-platform backup tool Rdiff-backup crashes when backing up to NFS (Devuan)

Hi Tobias,

Avoid cross-posting, this just creates noise, and then part of the 
information is one of the places and not the other.

Conversation continues at 
https://github.com/rdiff-backup/rdiff-backup/issues/789

On 21/11/2022 10:18, Tobias Leupold wrote:
> Hi all,
> 
> I've been using rdiff-backup without any problem now for years, but now 
> I have one: I'm about to migrate a small server from Gentoo to Devuan. I 
> got most of my stuff working, but my automated backup to an NFS share 
> doesn't work. Rdiff-backup crashes.
> 
> I can't even backup a single file to the share:
> 
>      # cd
>      # mkdir foo
>      # touch foo/bar
>      # rdiff-backup foo/ /nas/backup/test/

Is this really the only thing you backup? Could you then call 
`rdiff-backup -v9 foo/ /nas/backup/test/` and attach the full output to 
the issue (the logs are under /nas/backup/test/rdiff-backup-data)?

Thanks, Eric

>      Exception '[Errno 22] Invalid argument' raised of class '<class 
> 'OSError'>':
>      File "/usr/lib/python3/dist-packages/rdiff_backup/Main.py", line 
> 395, in error_check_Main
>          Main(arglist)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/Main.py", line 
> 417, in Main
>          take_action(rps)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/Main.py", line 
> 353, in take_action
>          Backup(rps[0], rps[1])
>      File "/usr/lib/python3/dist-packages/rdiff_backup/Main.py", line 
> 442, in Backup
>          backup.Mirror(rpin, rpout)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/backup.py", line 
> 39, in Mirror
>          DestS.patch(dest_rpath, source_diffiter)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/backup.py", line 
> 269, in patch
>          ITR(diff.index, diff)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/rorpiter.py", 
> line 313, in __call__
>          last_branch.fast_process(*args)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/backup.py", line 
> 587, in fast_process
>          if self.patch_to_temp(mirror_rp, diff_rorp, tf):
>      File "/usr/lib/python3/dist-packages/rdiff_backup/backup.py", line 
> 636, in patch_to_temp
>          rpath.copy_attribs(diff_rorp, new)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/rpath.py", line 
> 238, in copy_attribs
>          rpout.write_ea(rpin.get_ea())
>      File "/usr/lib/python3/dist-packages/rdiff_backup/rpath.py", line 
> 1664, in write_ea
>          ea.write_to_rp(self)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/eas_acls.py", 
> line 131, in write_to_rp
>          self.clear_rp(rp)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/eas_acls.py", 
> line 106, in clear_rp
>          rp.conn.xattr.remove(rp.path, name, rp.issym())
> 
>      Traceback (most recent call last):
>      File "/usr/bin/rdiff-backup", line 32, in <module>
>          rdiff_backup.Main.error_check_Main(sys.argv[1:])
>      File "/usr/lib/python3/dist-packages/rdiff_backup/Main.py", line 
> 395, in error_check_Main
>          Main(arglist)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/Main.py", line 
> 417, in Main
>          take_action(rps)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/Main.py", line 
> 353, in take_action
>          Backup(rps[0], rps[1])
>      File "/usr/lib/python3/dist-packages/rdiff_backup/Main.py", line 
> 442, in Backup
>          backup.Mirror(rpin, rpout)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/backup.py", line 
> 39, in Mirror
>          DestS.patch(dest_rpath, source_diffiter)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/backup.py", line 
> 269, in patch
>          ITR(diff.index, diff)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/rorpiter.py", 
> line 313, in __call__
>          last_branch.fast_process(*args)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/backup.py", line 
> 587, in fast_process
>          if self.patch_to_temp(mirror_rp, diff_rorp, tf):
>      File "/usr/lib/python3/dist-packages/rdiff_backup/backup.py", line 
> 636, in patch_to_temp
>          rpath.copy_attribs(diff_rorp, new)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/rpath.py", line 
> 238, in copy_attribs
>          rpout.write_ea(rpin.get_ea())
>      File "/usr/lib/python3/dist-packages/rdiff_backup/rpath.py", line 
> 1664, in write_ea
>          ea.write_to_rp(self)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/eas_acls.py", 
> line 131, in write_to_rp
>          self.clear_rp(rp)
>      File "/usr/lib/python3/dist-packages/rdiff_backup/eas_acls.py", 
> line 106, in clear_rp
>          rp.conn.xattr.remove(rp.path, name, rp.issym())
>      OSError: [Errno 22] Invalid argument
> 
> Using the very same share on another machine (running Gentoo and Artix) 
> letting rdiff-backup make some backup to it works without a problem, so 
> I suppose my NFS server is okay, and this is some Devuan (and also 
> Debian?) specific problem.
> 
> I'm a bit out of ideas now ... can anybody help me? Thanks in advance!
> 
> Cheers, Tobias
>