openssh bugs - Dec 2011 - [Bug 1953] New: Implementation of xattr in sftp-server for sshfs

https://bugzilla.mindrot.org/show_bug.cgi?id=1953

             Bug #: 1953
           Summary: Implementation of xattr in sftp-server for sshfs
    Classification: Unclassified
           Product: Portable OpenSSH
           Version: 5.9p1
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: patch
          Severity: enhancement
          Priority: P2
         Component: sftp-server
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: e.kuemmerle at fz-juelich.de


Created attachment 2109
  --> https://bugzilla.mindrot.org/attachment.cgi?id=2109
Patch that implements xattr in sftp-server

In the attachment you will find a patch that implements xattr
functionality in the sftp-server, intended to be used by sshfs.
A corresponding patch to sshfs will be filed to the sshfs developers.

I did not implement xattr in sftp-client, because I think that it is
not really useful: For sshfs, the low level functions
set-/get-/list-/removexattr are needed. But for a user interface like
sftp-client, high level functions like set-/getfacl and set-/getfattr
would be necessary. These are rather complex and would unnecessarily
burden the sftp-client code in my opinion.

Additionally, I changed the limitation of entries per message in
process_readdir from max. 100 entries to a packet size limitation,
because the size per entry may be enlarged by xattr data. But
typically, much more than 100 entries can now be sent in one message.

I hope, that you are interested in my patch.

Thanks,
  Eberhard

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https://bugzilla.mindrot.org/show_bug.cgi?id=1953

Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |djm at mindrot.org

--- Comment #1 from Damien Miller <djm at mindrot.org> 2011-12-02 10:48:41
EST ---
I'm not sure we want to go beyond basic POSIX in our sftp. Keeping it
simple was one of the motivations for not implementing features from
draft-filexfer versions > 2

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