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, 19 insertions, 0 deletions

diff --git a/tests/fallocate.rc b/tests/fallocate.rc
new file mode 100644
index 00000000000..3756bb949bd
--- /dev/null
+++ b/tests/fallocate.rc
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Helper to verify a given fallocate command is supported and skip a test
+# otherwise. Older versions of the fallocate utility might not support all modes
+# (i.e., discard) and older versions of fuse might not support the associated
+# fallocate requests.
+
+function require_fallocate()
+{
+	output=`fallocate $* 2>&1`
+	ret=$?
+	if [ ! $ret -eq 0 ] && ([[ $output == *unsupported* ]] ||
+				[[ $output == *invalid* ]] ||
+				[[ $output == *"not supported"* ]])
+	then
+		SKIP_TESTS
+		exit
+	fi
+}