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>

4 files changed, 87 insertions, 0 deletions

diff --git a/rpc/rpc-lib/src/protocol-common.h b/rpc/rpc-lib/src/protocol-common.h
index c645351eb9e..214e84009d2 100644
--- a/rpc/rpc-lib/src/protocol-common.h
+++ b/rpc/rpc-lib/src/protocol-common.h
@@ -53,6 +53,7 @@ enum gf_fop_procnum {
         GFS3_OP_SETATTR,
         GFS3_OP_FSETATTR,
         GFS3_OP_READDIRP,
+	GFS3_OP_FALLOCATE,
         GFS3_OP_RELEASE,
         GFS3_OP_RELEASEDIR,
         GFS3_OP_FREMOVEXATTR,
diff --git a/rpc/xdr/src/glusterfs3-xdr.c b/rpc/xdr/src/glusterfs3-xdr.c
index a502b2ea16c..2ce0b84ede9 100644
--- a/rpc/xdr/src/glusterfs3-xdr.c
+++ b/rpc/xdr/src/glusterfs3-xdr.c
@@ -1507,6 +1507,46 @@ xdr_gfs3_fsetattr_rsp (XDR *xdrs, gfs3_fsetattr_rsp *objp)
 }
 
 bool_t
+xdr_gfs3_fallocate_req (XDR *xdrs, gfs3_fallocate_req *objp)
+{
+	register int32_t *buf;
+        buf = NULL;
+
+	 if (!xdr_opaque (xdrs, objp->gfid, 16))
+		 return FALSE;
+	 if (!xdr_quad_t (xdrs, &objp->fd))
+		 return FALSE;
+	 if (!xdr_u_int (xdrs, &objp->flags))
+		 return FALSE;
+	 if (!xdr_u_quad_t (xdrs, &objp->offset))
+		 return FALSE;
+	 if (!xdr_u_quad_t (xdrs, &objp->size))
+		 return FALSE;
+	 if (!xdr_bytes (xdrs, (char **)&objp->xdata.xdata_val, (u_int *) &objp->xdata.xdata_len, ~0))
+		 return FALSE;
+	return TRUE;
+}
+
+bool_t
+xdr_gfs3_fallocate_rsp (XDR *xdrs, gfs3_fallocate_rsp *objp)
+{
+	register int32_t *buf;
+        buf = NULL;
+
+	 if (!xdr_int (xdrs, &objp->op_ret))
+		 return FALSE;
+	 if (!xdr_int (xdrs, &objp->op_errno))
+		 return FALSE;
+	 if (!xdr_gf_iatt (xdrs, &objp->statpre))
+		 return FALSE;
+	 if (!xdr_gf_iatt (xdrs, &objp->statpost))
+		 return FALSE;
+	 if (!xdr_bytes (xdrs, (char **)&objp->xdata.xdata_val, (u_int *) &objp->xdata.xdata_len, ~0))
+		 return FALSE;
+	return TRUE;
+}
+
+bool_t
 xdr_gfs3_rchecksum_req (XDR *xdrs, gfs3_rchecksum_req *objp)
 {
 	register int32_t *buf;
diff --git a/rpc/xdr/src/glusterfs3-xdr.h b/rpc/xdr/src/glusterfs3-xdr.h
index 0268d1a144a..2f9ba4b4552 100644
--- a/rpc/xdr/src/glusterfs3-xdr.h
+++ b/rpc/xdr/src/glusterfs3-xdr.h
@@ -887,6 +887,31 @@ struct gfs3_fsetattr_rsp {
 };
 typedef struct gfs3_fsetattr_rsp gfs3_fsetattr_rsp;
 
+struct gfs3_fallocate_req {
+	char gfid[16];
+	quad_t fd;
+	u_int flags;
+	u_quad_t offset;
+	u_quad_t size;
+	struct {
+		u_int xdata_len;
+		char *xdata_val;
+	} xdata;
+};
+typedef struct gfs3_fallocate_req gfs3_fallocate_req;
+
+struct gfs3_fallocate_rsp {
+	int op_ret;
+	int op_errno;
+	struct gf_iatt statpre;
+	struct gf_iatt statpost;
+	struct {
+		u_int xdata_len;
+		char *xdata_val;
+	} xdata;
+};
+typedef struct gfs3_fallocate_rsp gfs3_fallocate_rsp;
+
 struct gfs3_rchecksum_req {
 	quad_t fd;
 	u_quad_t offset;
@@ -1182,6 +1207,8 @@ extern  bool_t xdr_gfs3_setattr_req (XDR *, gfs3_setattr_req*);
 extern  bool_t xdr_gfs3_setattr_rsp (XDR *, gfs3_setattr_rsp*);
 extern  bool_t xdr_gfs3_fsetattr_req (XDR *, gfs3_fsetattr_req*);
 extern  bool_t xdr_gfs3_fsetattr_rsp (XDR *, gfs3_fsetattr_rsp*);
+extern  bool_t xdr_gfs3_fallocate_req (XDR *, gfs3_fallocate_req*);
+extern  bool_t xdr_gfs3_fallocate_rsp (XDR *, gfs3_fallocate_rsp*);
 extern  bool_t xdr_gfs3_rchecksum_req (XDR *, gfs3_rchecksum_req*);
 extern  bool_t xdr_gfs3_rchecksum_rsp (XDR *, gfs3_rchecksum_rsp*);
 extern  bool_t xdr_gf_setvolume_req (XDR *, gf_setvolume_req*);
@@ -1276,6 +1303,8 @@ extern bool_t xdr_gfs3_setattr_req ();
 extern bool_t xdr_gfs3_setattr_rsp ();
 extern bool_t xdr_gfs3_fsetattr_req ();
 extern bool_t xdr_gfs3_fsetattr_rsp ();
+extern bool_t xdr_gfs3_fallocate_req ();
+extern bool_t xdr_gfs3_fallocate_rsp ();
 extern bool_t xdr_gfs3_rchecksum_req ();
 extern bool_t xdr_gfs3_rchecksum_rsp ();
 extern bool_t xdr_gf_setvolume_req ();
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;