bugGNU tar - Bugs: bug #64023, Can't backup extended attributes...


bug #64023: Can't backup extended attributes system.cifs_acl

Submitter:  Felix Vollmer <fvollmer>
Submitted:  Tue 11 Apr 2023 06:45:00 AM UTC
Category:  None Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open
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Tue 11 Apr 2023 06:45:00 AM UTC, original submission:  

The linux kernel exposes the the acls of files via the extended attribute system.cifs_acl (see fs/cifs/xattr.c for all attributes). It seems impossible to backup those with gnu tar. I tried
tar --xattrs -xattrs-include=system.cifs_acl -cvf /target /source1

The issue seems that these extended attributes are "virtual"
getfattr -d -m ".*" filename
won't show that those attributes are available, but
getfattr -n system.cifs_acl filename
will show them. So you need to know their name.

Felix Vollmer

Felix Vollmer <fvollmer>


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

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