From 31742c5a331766bc7df6b0d525df00c6cd20d5a6 Mon Sep 17 00:00:00 2001
From: Steve French <smfrench@gmail.com>
Date: Sun, 17 Aug 2014 08:38:47 -0500
Subject: [PATCH] enable fallocate punch hole ("fallocate -p") for SMB3

Implement FALLOC_FL_PUNCH_HOLE (which does not change the file size
fortunately so this matches the behavior of the equivalent SMB3
fsctl call) for SMB3 mounts.  This allows "fallocate -p" to work.
It requires that the server support setting files as sparse
(which Windows allows).

Signed-off-by: Steve French <smfrench@gmail.com>
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