gluster: add fallocate fop support

Implement support for the fallocate file operation. fallocate
allocates blocks for a particular inode such that future writes
to the associated region of the file are guaranteed not to fail
with ENOSPC.

This patch adds fallocate support to the following areas:

	- libglusterfs
	- mount/fuse
	- io-stats
	- performance/md-cache,open-behind
	- quota
	- cluster/afr,dht,stripe
	- rpc/xdr
	- protocol/client,server
	- io-threads
	- marker
	- storage/posix
	- libgfapi

BUG: 949242
Change-Id: Ice8e61351f9d6115c5df68768bc844abbf0ce8bd
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-on: http://review.gluster.org/4969
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/rpc/xdr/src/glusterfs3-xdr.x b/rpc/xdr/src/glusterfs3-xdr.x
index 063f302d933..7fad58336a6 100644
--- a/rpc/xdr/src/glusterfs3-xdr.x
+++ b/rpc/xdr/src/glusterfs3-xdr.x
@@ -566,6 +566,23 @@ struct gfs3_fstat_req {
         opaque   xdata<>; /* Extra data */
 }  ;
 
+ struct gfs3_fallocate_req {
+	opaque		gfid[16];
+        hyper		fd;
+	unsigned int	flags;
+	unsigned hyper	offset;
+	unsigned hyper	size;
+        opaque   xdata<>; /* Extra data */
+}  ;
+
+ struct gfs3_fallocate_rsp {
+        int    op_ret;
+        int    op_errno;
+        struct gf_iatt statpre;
+        struct gf_iatt statpost;
+        opaque   xdata<>; /* Extra data */
+}  ;
+
  struct gfs3_rchecksum_req {
         hyper   fd;
         unsigned hyper  offset;