tree 16d9511c07bb1287d3763f5539634cc9bd9fd549
parent a0af710a6510213672d28f83681c391d36a7555e
author Jeff Layton <jlayton@redhat.com> 1352750448 -0500
committer J. Bruce Fields <bfields@redhat.com> 1352764510 -0500

nfsd: add a usermodehelper upcall for NFSv4 client ID tracking

Add a new client tracker upcall type that uses call_usermodehelper to
call out to a program. This seems to be the preferred method of
calling out to usermode these days for seldom-called upcalls. It's
simple and doesn't require a running daemon, so it should "just work"
as long as the binary is installed.

The client tracking exit operation is also changed to check for a
NULL pointer before running. The UMH upcall doesn't need to do anything
at module teardown time.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>