libceph: wrap auth methods in a mutex
commit e9966076 upstream. The auth code is called from a variety of contexts, include the mon_client (protected by the monc's mutex) and the messenger callbacks (currently protected by nothing). Avoid chaos by protecting all auth state with a mutex. Nothing is blocking, so this should be simple and lightweight. Signed-off-by:Sage Weil <sage@inktank.com> Reviewed-by:
Alex Elder <elder@inktank.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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