SMB3 Posix Setinfo class?

David Mulder dmulder at
Mon Sep 26 17:12:28 UTC 2022

Currently I've defined in the smb3 posix spec a set info request to use 
the FilePosixInformation class defined here:

I noticed that MS-FSCC (section 2.4) defines different info classes for 
set and query.

It seems to me that FilePosixInformation, as it's currently defined, is 
better defined as a query only class. Most of the attributes are not 
modifiable via a setinfo. I think we should define an additional info 
class for setinfo, allowing you to set POSIXPerms (any other attributes 
make sense here?).

Either way, I don't think anyone has implemented setinfo for 
FilePosixInformation anyway (it's not in Samba at least).


David Mulder
Labs Software Engineer, Samba
1221 S Valley Grove Way, Suite 500
Pleasant Grove, UT 84062
(P)+1 385.208.2989
dmulder at

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