[rdiff-backup-users] fails trying to save xattr where no xattr exists

[martin f krafft]

I am trying to backup a host and rdiff backup fails spectacularly:

Regular copying ('etc', 'apache2', 'passwd', 'passwd.bit') to 
rdiff-backup/etc/apache2/passwd/rdiff-backup.tmp.476
Writing file object to rdiff-backup/etc/apache2/passwd/rdiff-backup.tmp.476
Copying attributes from ('etc', 'apache2', 'passwd', 'passwd.bit') to 
rdiff-backup/etc/apache2/passwd/rdiff-backup.tmp.476
Sending back exception [Errno 1] Operation not permitted of type 
exceptions.IOError: 
  File "/var/lib/python-support/python2.4/rdiff_backup/connection.py", line 
334, in answer_request
    result = apply(eval(request.function_string), argument_list)
  File "/var/lib/python-support/python2.4/rdiff_backup/backup.py", line 232, in 
patch
    ITR(diff.index, diff)
  File "/var/lib/python-support/python2.4/rdiff_backup/rorpiter.py", line 281, 
in __call__
    last_branch.fast_process(*args)
  File "/var/lib/python-support/python2.4/rdiff_backup/backup.py", line 529, in 
fast_process
    if self.patch_to_temp(mirror_rp, diff_rorp, tf):
  File "/var/lib/python-support/python2.4/rdiff_backup/backup.py", line 556, in 
patch_to_temp
    rpath.copy_attribs(diff_rorp, new)
  File "/var/lib/python-support/python2.4/rdiff_backup/rpath.py", line 178, in 
copy_attribs
    if Globals.eas_write: rpout.write_ea(rpin.get_ea())
  File "/var/lib/python-support/python2.4/rdiff_backup/rpath.py", line 1256, in 
write_ea
    ea.write_to_rp(self)
  File "/var/lib/python-support/python2.4/rdiff_backup/eas_acls.py", line 110, 
in write_to_rp
    rp.conn.xattr.setxattr(rp.path, name, value)


This suggests that there's some xattr-related stuff going on, but
/etc/apache2/passwd/passwd.bit does not have any xattr attached,
according to getfattr; the filesystem isn't even mounted with the
user_xattr option. Interestingly, rdiff-backup thinks that extended
attributes are supported:

-----------------------------------------------------------------
Detected abilities for source (read only) file system:
  Access control lists                         On
  Extended attributes                          On
[...]

And it recognises that the destination also supports them:

-----------------------------------------------------------------
Detected abilities for destination (read/write) file system:
[...]
  Access control lists                         On
  Extended attributes                          On

python-pylibacl and python-pyxattr (not python-xattr) are installed.
This is a Debian system.

Note that I am using 1.1.16, and 1.1.15 was previously able to back
this host up without errors.

What's going on? How can I fix this?

-- 
martin | http://madduck.net/ | http://two.sentenc.es/
 
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