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, 16 insertions, 0 deletions

diff --git a/libglusterfs/src/call-stub.h b/libglusterfs/src/call-stub.h
index 335111835b6..d940fe6f173 100644
--- a/libglusterfs/src/call-stub.h
+++ b/libglusterfs/src/call-stub.h
@@ -69,6 +69,7 @@ typedef struct {
 		fop_fxattrop_t fxattrop;
 		fop_setattr_t setattr;
 		fop_fsetattr_t fsetattr;
+		fop_fallocate_t fallocate;
 	} fn;
 
 	union {
@@ -113,6 +114,7 @@ typedef struct {
 		fop_fxattrop_cbk_t fxattrop;
 		fop_setattr_cbk_t setattr;
 		fop_fsetattr_cbk_t fsetattr;
+		fop_fallocate_cbk_t fallocate;
 	} fn_cbk;
 
 	struct {
@@ -713,6 +715,20 @@ fop_fsetattr_cbk_stub (call_frame_t *frame,
                        struct iatt *statpre,
                        struct iatt *statpost, dict_t *xdata);
 
+call_stub_t *
+fop_fallocate_stub(call_frame_t *frame,
+		   fop_fallocate_t fn,
+		   fd_t *fd,
+		   int32_t mode, off_t offset,
+		   size_t len, dict_t *xdata);
+
+call_stub_t *
+fop_fallocate_cbk_stub(call_frame_t *frame,
+		       fop_fallocate_cbk_t fn,
+                       int32_t op_ret, int32_t op_errno,
+                       struct iatt *statpre, struct iatt *statpost,
+                       dict_t *xdata);
+
 void call_resume (call_stub_t *stub);
 void call_stub_destroy (call_stub_t *stub);
 void call_unwind_error (call_stub_t *stub, int op_ret, int op_errno);