On 7/8/2017 9:01 PM, Theodore Ts'o wrote: > On Sat, Jul 08, 2017 at 12:44:54PM -0700, Linus Torvalds wrote: >> Yeah, I think attributes are likely much better than some random crazy >> ioctl interface. They can be listed with generic tools, and have >> various scripting interfaces in ways that ioctl's do not sanely have. > > I personally don't have a particular problem with these xattrs. For > one thing, they are read-only. You use them just to find out the AFS > cell, the AFS "fid", and the AFS volume name. > > I think the place where people will start getting nervous is when we > start adding "write-only" xattrs or where writing to an xattr causes a > side-effect to take place. Ted, The list of AFS pioctls and the proposed alternatives for kAFS are listed at https://www.infradead.org/~dhowells/kafs/user_interface.html While it is true that the majority of the proposed xattrs are read-only properties of AFS objects (cell, volume, fid, servers, sec_class, sec_mode) there is one exception that is read-write (acls). AuriStorFS permits acls to be set per-file; there was some per-file acl work begun for OpenAFS but it was never completed. Is there an alternative for fetching and setting ACLs that should be considered? Jeffrey Altman
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