On 09/23/2016 08:28 AM, Pranith Kumar Karampuri wrote:
hi,
Jiffin found an interesting problem in posix xlator where we have
never been using setfsuid/gid (http://review.gluster.org/#/c/15545/),
what I am seeing regressions after this is, if the files are created
using non-root user then the file creation fails because that user
doesn't have permissions to create the gfid-link. So it seems like the
correct way forward for this patch is to write wrappers around
sys_<syscall> to do setfsuid/gid do the actual operation requested and
then set it back to old uid/gid and then do the internal operations. I
am planning to write posix_sys_<syscall>() to do the same, may be a macro?.
Why not otherwise around? As in can we switch to superuser when required
so that we know what all internal operations need root access and avoid
misusing it.
Thanks,
Soumya
I need inputs from you guys to let me know if I am on the right path
and if you see any issues with this approach.
--
Pranith
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