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Hi Brian, Bockjoo,

While waiting for Andy to be back from vacation and answer this question, as a temporary workaround, one can provide a checksum script to the xrootd.chksum directive to handle checksum verification.

regards,
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Wei Yang  |  [log in to unmask]  |  650-926-3338(O)

On 8/22/19, 9:08 PM, "[log in to unmask] on behalf of Bockelman, Brian" <[log in to unmask] on behalf of [log in to unmask]> wrote:

    Hi all,
    
    Bockjoo Kim (CC'd) at Florida utilizes the xrootd-multiuser plugin to allow Xrootd to change the thread-specific filesystem user when accessing their underlying Lustre filesystem.
    
    This works well *except* when saving the results of checksum calculation to extended attributes; in that case, a permission denied is received.  Looking at the code, it seems that the Linux setxattr function is called directly - as opposed to being managed by the OSS layer.
    
    Is it possible to get xattrs to be handled by the OSS layer (and change XrdCks to use OSS)?  That would allow a clean integration with Lustre at Florida.
    
    Thanks,
    
    Brian
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